diff options
Diffstat (limited to 'linux/LinuxProcessList.c')
| -rw-r--r-- | linux/LinuxProcessList.c | 2302 |
1 files changed, 2302 insertions, 0 deletions
diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c new file mode 100644 index 0000000..eca9459 --- /dev/null +++ b/linux/LinuxProcessList.c @@ -0,0 +1,2302 @@ +/* +htop - LinuxProcessList.c +(C) 2014 Hisham H. Muhammad +Released under the GNU GPLv2+, see the COPYING file +in the source distribution for its full text. +*/ + +#include "config.h" // IWYU pragma: keep + +#include "linux/LinuxProcessList.h" + +#include <assert.h> +#include <ctype.h> +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <math.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#include <time.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/types.h> + +#ifdef HAVE_DELAYACCT +#include <linux/netlink.h> +#include <linux/taskstats.h> +#include <netlink/attr.h> +#include <netlink/handlers.h> +#include <netlink/msg.h> +#include <netlink/netlink.h> +#include <netlink/socket.h> +#include <netlink/genl/genl.h> +#include <netlink/genl/ctrl.h> +#endif + +#include "Compat.h" +#include "CRT.h" +#include "Macros.h" +#include "Object.h" +#include "Process.h" +#include "Settings.h" +#include "XUtils.h" +#include "linux/CGroupUtils.h" +#include "linux/LinuxProcess.h" +#include "linux/Platform.h" // needed for GNU/hurd to get PATH_MAX // IWYU pragma: keep + +#if defined(MAJOR_IN_MKDEV) +#include <sys/mkdev.h> +#elif defined(MAJOR_IN_SYSMACROS) +#include <sys/sysmacros.h> +#endif + +#ifdef HAVE_SENSORS_SENSORS_H +#include "LibSensors.h" +#endif + +#ifndef O_PATH +#define O_PATH 010000000 // declare for ancient glibc versions +#endif + +/* Not exposed yet. Defined at include/linux/sched.h */ +#ifndef PF_KTHREAD +#define PF_KTHREAD 0x00200000 +#endif + +static long long btime = -1; + +static long jiffy; + +static FILE* fopenat(openat_arg_t openatArg, const char* pathname, const char* mode) { + assert(String_eq(mode, "r")); /* only currently supported mode */ + + int fd = Compat_openat(openatArg, pathname, O_RDONLY); + if (fd < 0) + return NULL; + + FILE* stream = fdopen(fd, mode); + if (!stream) + close(fd); + + return stream; +} + +static int sortTtyDrivers(const void* va, const void* vb) { + const TtyDriver* a = (const TtyDriver*) va; + const TtyDriver* b = (const TtyDriver*) vb; + + int r = SPACESHIP_NUMBER(a->major, b->major); + if (r) + return r; + + return SPACESHIP_NUMBER(a->minorFrom, b->minorFrom); +} + +static void LinuxProcessList_initTtyDrivers(LinuxProcessList* this) { + TtyDriver* ttyDrivers; + + char buf[16384]; + ssize_t r = xReadfile(PROCTTYDRIVERSFILE, buf, sizeof(buf)); + if (r < 0) + return; + + int numDrivers = 0; + int allocd = 10; + ttyDrivers = xMallocArray(allocd, sizeof(TtyDriver)); + char* at = buf; + while (*at != '\0') { + at = strchr(at, ' '); // skip first token + while (*at == ' ') at++; // skip spaces + const char* token = at; // mark beginning of path + at = strchr(at, ' '); // find end of path + *at = '\0'; at++; // clear and skip + ttyDrivers[numDrivers].path = xStrdup(token); // save + while (*at == ' ') at++; // skip spaces + token = at; // mark beginning of major + at = strchr(at, ' '); // find end of major + *at = '\0'; at++; // clear and skip + ttyDrivers[numDrivers].major = atoi(token); // save + while (*at == ' ') at++; // skip spaces + token = at; // mark beginning of minorFrom + while (*at >= '0' && *at <= '9') at++; //find end of minorFrom + if (*at == '-') { // if has range + *at = '\0'; at++; // clear and skip + ttyDrivers[numDrivers].minorFrom = atoi(token); // save + token = at; // mark beginning of minorTo + at = strchr(at, ' '); // find end of minorTo + *at = '\0'; at++; // clear and skip + ttyDrivers[numDrivers].minorTo = atoi(token); // save + } else { // no range + *at = '\0'; at++; // clear and skip + ttyDrivers[numDrivers].minorFrom = atoi(token); // save + ttyDrivers[numDrivers].minorTo = atoi(token); // save + } + at = strchr(at, '\n'); // go to end of line + at++; // skip + numDrivers++; + if (numDrivers == allocd) { + allocd += 10; + ttyDrivers = xReallocArray(ttyDrivers, allocd, sizeof(TtyDriver)); + } + } + numDrivers++; + ttyDrivers = xRealloc(ttyDrivers, sizeof(TtyDriver) * numDrivers); + ttyDrivers[numDrivers - 1].path = NULL; + qsort(ttyDrivers, numDrivers - 1, sizeof(TtyDriver), sortTtyDrivers); + this->ttyDrivers = ttyDrivers; +} + +#ifdef HAVE_DELAYACCT + +static void LinuxProcessList_initNetlinkSocket(LinuxProcessList* this) { + this->netlink_socket = nl_socket_alloc(); + if (this->netlink_socket == NULL) { + return; + } + if (nl_connect(this->netlink_socket, NETLINK_GENERIC) < 0) { + return; + } + this->netlink_family = genl_ctrl_resolve(this->netlink_socket, TASKSTATS_GENL_NAME); +} + +#endif + +static unsigned int scanAvailableCPUsFromCPUinfo(LinuxProcessList* this) { + FILE* file = fopen(PROCCPUINFOFILE, "r"); + if (file == NULL) + return this->super.existingCPUs; + + unsigned int availableCPUs = 0; + + while (!feof(file)) { + char buffer[PROC_LINE_LENGTH]; + + if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL) + break; + + if (String_startsWith(buffer, "processor")) + availableCPUs++; + } + + fclose(file); + + return availableCPUs ? availableCPUs : 1; +} + +static void LinuxProcessList_updateCPUcount(ProcessList* super) { + /* Similar to get_nprocs_conf(3) / _SC_NPROCESSORS_CONF + * https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/getsysstats.c;hb=HEAD + */ + + LinuxProcessList* this = (LinuxProcessList*) super; + unsigned int existing = 0, active = 0; + + // Initialize the cpuData array before anything else. + if (!this->cpuData) { + this->cpuData = xCalloc(2, sizeof(CPUData)); + this->cpuData[0].online = true; /* average is always "online" */ + this->cpuData[1].online = true; + super->activeCPUs = 1; + super->existingCPUs = 1; + } + + DIR* dir = opendir("/sys/devices/system/cpu"); + if (!dir) + return; + + unsigned int currExisting = super->existingCPUs; + + const struct dirent* entry; + while ((entry = readdir(dir)) != NULL) { + if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN) + continue; + + if (!String_startsWith(entry->d_name, "cpu")) + continue; + + char* endp; + unsigned long int id = strtoul(entry->d_name + 3, &endp, 10); + if (id == ULONG_MAX || endp == entry->d_name + 3 || *endp != '\0') + continue; + +#ifdef HAVE_OPENAT + int cpuDirFd = openat(dirfd(dir), entry->d_name, O_DIRECTORY | O_PATH | O_NOFOLLOW); + if (cpuDirFd < 0) + continue; +#else + char cpuDirFd[4096]; + xSnprintf(cpuDirFd, sizeof(cpuDirFd), "/sys/devices/system/cpu/%s", entry->d_name); +#endif + + existing++; + + /* readdir() iterates with no specific order */ + unsigned int max = MAXIMUM(existing, id + 1); + if (max > currExisting) { + this->cpuData = xReallocArrayZero(this->cpuData, currExisting ? (currExisting + 1) : 0, max + /* aggregate */ 1, sizeof(CPUData)); + this->cpuData[0].online = true; /* average is always "online" */ + currExisting = max; + } + + char buffer[8]; + ssize_t res = xReadfileat(cpuDirFd, "online", buffer, sizeof(buffer)); + /* If the file "online" does not exist or on failure count as active */ + if (res < 1 || buffer[0] != '0') { + active++; + this->cpuData[id + 1].online = true; + } else { + this->cpuData[id + 1].online = false; + } + + Compat_openatArgClose(cpuDirFd); + } + + closedir(dir); + + // return if no CPU is found + if (existing < 1) + return; + + if (Running_containerized) { + /* LXC munges /proc/cpuinfo but not the /sys/devices/system/cpu/ files, + * so limit the visible CPUs to what the guest has been configured to see: */ + currExisting = active = scanAvailableCPUsFromCPUinfo(this); + } + +#ifdef HAVE_SENSORS_SENSORS_H + /* When started with offline CPUs, libsensors does not monitor those, + * even when they become online. */ + if (super->existingCPUs != 0 && (active > super->activeCPUs || currExisting > super->existingCPUs)) + LibSensors_reload(); +#endif + + super->activeCPUs = active; + assert(Running_containerized || (existing == currExisting)); + super->existingCPUs = currExisting; +} + +ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) { + LinuxProcessList* this = xCalloc(1, sizeof(LinuxProcessList)); + ProcessList* pl = &(this->super); + + ProcessList_init(pl, Class(LinuxProcess), usersTable, dynamicMeters, dynamicColumns, pidMatchList, userId); + LinuxProcessList_initTtyDrivers(this); + + // Initialize page size + pageSize = sysconf(_SC_PAGESIZE); + if (pageSize == -1) + CRT_fatalError("Cannot get pagesize by sysconf(_SC_PAGESIZE)"); + pageSizeKB = pageSize / ONE_K; + + // Initialize clock ticks + jiffy = sysconf(_SC_CLK_TCK); + if (jiffy == -1) + CRT_fatalError("Cannot get clock ticks by sysconf(_SC_CLK_TCK)"); + + // Test /proc/PID/smaps_rollup availability (faster to parse, Linux 4.14+) + this->haveSmapsRollup = (access(PROCDIR "/self/smaps_rollup", R_OK) == 0); + + // Read btime (the kernel boot time, as number of seconds since the epoch) + FILE* statfile = fopen(PROCSTATFILE, "r"); + if (statfile == NULL) + CRT_fatalError("Cannot open " PROCSTATFILE); + while (true) { + char buffer[PROC_LINE_LENGTH + 1]; + if (fgets(buffer, sizeof(buffer), statfile) == NULL) + break; + if (String_startsWith(buffer, "btime ") == false) + continue; + if (sscanf(buffer, "btime %lld\n", &btime) == 1) + break; + CRT_fatalError("Failed to parse btime from " PROCSTATFILE); + } + + fclose(statfile); + + if (btime == -1) + CRT_fatalError("No btime in " PROCSTATFILE); + + // Initialize CPU count + LinuxProcessList_updateCPUcount(pl); + + return pl; +} + +void ProcessList_delete(ProcessList* pl) { + LinuxProcessList* this = (LinuxProcessList*) pl; + ProcessList_done(pl); + free(this->cpuData); + if (this->ttyDrivers) { + for (int i = 0; this->ttyDrivers[i].path; i++) { + free(this->ttyDrivers[i].path); + } + free(this->ttyDrivers); + } + #ifdef HAVE_DELAYACCT + if (this->netlink_socket) { + nl_close(this->netlink_socket); + nl_socket_free(this->netlink_socket); + } + #endif + free(this); +} + +static inline unsigned long long LinuxProcessList_adjustTime(unsigned long long t) { + return t * 100 / jiffy; +} + +/* Taken from: https://github.com/torvalds/linux/blob/64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc/fs/proc/array.c#L120 */ +static inline ProcessState LinuxProcessList_getProcessState(char state) { + switch (state) { + case 'S': return SLEEPING; + case 'X': return DEFUNCT; + case 'Z': return ZOMBIE; + case 't': return TRACED; + case 'T': return STOPPED; + case 'D': return UNINTERRUPTIBLE_WAIT; + case 'R': return RUNNING; + case 'P': return BLOCKED; + case 'I': return IDLE; + default: return UNKNOWN; + } +} + +static bool LinuxProcessList_readStatFile(Process* process, openat_arg_t procFd, char* command, size_t commLen) { + LinuxProcess* lp = (LinuxProcess*) process; + + char buf[MAX_READ + 1]; + ssize_t r = xReadfileat(procFd, "stat", buf, sizeof(buf)); + if (r < 0) + return false; + + /* (1) pid - %d */ + assert(process->pid == atoi(buf)); + char* location = strchr(buf, ' '); + if (!location) + return false; + + /* (2) comm - (%s) */ + location += 2; + char* end = strrchr(location, ')'); + if (!end) + return false; + + String_safeStrncpy(command, location, MINIMUM((size_t)(end - location + 1), commLen)); + + location = end + 2; + + /* (3) state - %c */ + process->state = LinuxProcessList_getProcessState(location[0]); + location += 2; + + /* (4) ppid - %d */ + process->ppid = strtol(location, &location, 10); + location += 1; + + /* (5) pgrp - %d */ + process->pgrp = strtol(location, &location, 10); + location += 1; + + /* (6) session - %d */ + process->session = strtol(location, &location, 10); + location += 1; + + /* (7) tty_nr - %d */ + process->tty_nr = strtoul(location, &location, 10); + location += 1; + + /* (8) tpgid - %d */ + process->tpgid = strtol(location, &location, 10); + location += 1; + + /* (9) flags - %u */ + lp->flags = strtoul(location, &location, 10); + location += 1; + + /* (10) minflt - %lu */ + process->minflt = strtoull(location, &location, 10); + location += 1; + + /* (11) cminflt - %lu */ + lp->cminflt = strtoull(location, &location, 10); + location += 1; + + /* (12) majflt - %lu */ + process->majflt = strtoull(location, &location, 10); + location += 1; + + /* (13) cmajflt - %lu */ + lp->cmajflt = strtoull(location, &location, 10); + location += 1; + + /* (14) utime - %lu */ + lp->utime = LinuxProcessList_adjustTime(strtoull(location, &location, 10)); + location += 1; + + /* (15) stime - %lu */ + lp->stime = LinuxProcessList_adjustTime(strtoull(location, &location, 10)); + location += 1; + + /* (16) cutime - %ld */ + lp->cutime = LinuxProcessList_adjustTime(strtoull(location, &location, 10)); + location += 1; + + /* (17) cstime - %ld */ + lp->cstime = LinuxProcessList_adjustTime(strtoull(location, &location, 10)); + location += 1; + + /* (18) priority - %ld */ + process->priority = strtol(location, &location, 10); + location += 1; + + /* (19) nice - %ld */ + process->nice = strtol(location, &location, 10); + location += 1; + + /* (20) num_threads - %ld */ + process->nlwp = strtol(location, &location, 10); + location += 1; + + /* Skip (21) itrealvalue - %ld */ + location = strchr(location, ' ') + 1; + + /* (22) starttime - %llu */ + if (process->starttime_ctime == 0) { + process->starttime_ctime = btime + LinuxProcessList_adjustTime(strtoll(location, &location, 10)) / 100; + } else { + location = strchr(location, ' '); + } + location += 1; + + /* Skip (23) - (38) */ + for (int i = 0; i < 16; i++) { + location = strchr(location, ' ') + 1; + } + + assert(location != NULL); + + /* (39) processor - %d */ + process->processor = strtol(location, &location, 10); + + /* Ignore further fields */ + + process->time = lp->utime + lp->stime; + + return true; +} + + +static bool LinuxProcessList_updateUser(ProcessList* processList, Process* process, openat_arg_t procFd) { + struct stat sstat; +#ifdef HAVE_OPENAT + int statok = fstat(procFd, &sstat); +#else + int statok = stat(procFd, &sstat); +#endif + if (statok == -1) + return false; + + if (process->st_uid != sstat.st_uid) { + process->st_uid = sstat.st_uid; + process->user = UsersTable_getRef(processList->usersTable, sstat.st_uid); + } + + return true; +} + +static void LinuxProcessList_readIoFile(LinuxProcess* process, openat_arg_t procFd, unsigned long long realtimeMs) { + char buffer[1024]; + ssize_t r = xReadfileat(procFd, "io", buffer, sizeof(buffer)); + if (r < 0) { + process->io_rate_read_bps = NAN; + process->io_rate_write_bps = NAN; + process->io_rchar = ULLONG_MAX; + process->io_wchar = ULLONG_MAX; + process->io_syscr = ULLONG_MAX; + process->io_syscw = ULLONG_MAX; + process->io_read_bytes = ULLONG_MAX; + process->io_write_bytes = ULLONG_MAX; + process->io_cancelled_write_bytes = ULLONG_MAX; + process->io_last_scan_time_ms = realtimeMs; + return; + } + + unsigned long long last_read = process->io_read_bytes; + unsigned long long last_write = process->io_write_bytes; + unsigned long long time_delta = realtimeMs > process->io_last_scan_time_ms ? realtimeMs - process->io_last_scan_time_ms : 0; + + char* buf = buffer; + const char* line; + while ((line = strsep(&buf, "\n")) != NULL) { + switch (line[0]) { + case 'r': + if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) { + process->io_rchar = strtoull(line + 7, NULL, 10); + } else if (String_startsWith(line + 1, "ead_bytes: ")) { + process->io_read_bytes = strtoull(line + 12, NULL, 10); + process->io_rate_read_bps = time_delta ? (process->io_read_bytes - last_read) * /*ms to s*/1000. / time_delta : NAN; + } + break; + case 'w': + if (line[1] == 'c' && String_startsWith(line + 2, "har: ")) { + process->io_wchar = strtoull(line + 7, NULL, 10); + } else if (String_startsWith(line + 1, "rite_bytes: ")) { + process->io_write_bytes = strtoull(line + 13, NULL, 10); + process->io_rate_write_bps = time_delta ? (process->io_write_bytes - last_write) * /*ms to s*/1000. / time_delta : NAN; + } + break; + case 's': + if (line[4] == 'r' && String_startsWith(line + 1, "yscr: ")) { + process->io_syscr = strtoull(line + 7, NULL, 10); + } else if (String_startsWith(line + 1, "yscw: ")) { + process->io_syscw = strtoull(line + 7, NULL, 10); + } + break; + case 'c': + if (String_startsWith(line + 1, "ancelled_write_bytes: ")) { + process->io_cancelled_write_bytes = strtoull(line + 23, NULL, 10); + } + } + } + + process->io_last_scan_time_ms = realtimeMs; +} + +typedef struct LibraryData_ { + uint64_t size; + bool exec; +} LibraryData; + +static inline uint64_t fast_strtoull_dec(char** str, int maxlen) { + register uint64_t result = 0; + + if (!maxlen) + --maxlen; + + while (maxlen-- && **str >= '0' && **str <= '9') { + result *= 10; + result += **str - '0'; + (*str)++; + } + + return result; +} + +static inline uint64_t fast_strtoull_hex(char** str, int maxlen) { + register uint64_t result = 0; + register int nibble, letter; + const long valid_mask = 0x03FF007E; + + if (!maxlen) + --maxlen; + + while (maxlen--) { + nibble = (unsigned char)**str; + if (!(valid_mask & (1 << (nibble & 0x1F)))) + break; + if ((nibble < '0') || (nibble & ~0x20) > 'F') + break; + letter = (nibble & 0x40) ? 'A' - '9' - 1 : 0; + nibble &=~0x20; // to upper + nibble ^= 0x10; // switch letters and digits + nibble -= letter; + nibble &= 0x0f; + result <<= 4; + result += (uint64_t)nibble; + (*str)++; + } + + return result; +} + +static void LinuxProcessList_calcLibSize_helper(ATTR_UNUSED ht_key_t key, void* value, void* data) { + if (!data) + return; + + if (!value) + return; + + const LibraryData* v = (const LibraryData*)value; + uint64_t* d = (uint64_t*)data; + if (!v->exec) + return; + + *d += v->size; +} + +static void LinuxProcessList_readMaps(LinuxProcess* process, openat_arg_t procFd, bool calcSize, bool checkDeletedLib) { + Process* proc = (Process*)process; + + proc->usesDeletedLib = false; + + FILE* mapsfile = fopenat(procFd, "maps", "r"); + if (!mapsfile) + return; + + Hashtable* ht = NULL; + if (calcSize) + ht = Hashtable_new(64, true); + + char buffer[1024]; + while (fgets(buffer, sizeof(buffer), mapsfile)) { + uint64_t map_start; + uint64_t map_end; + bool map_execute; + unsigned int map_devmaj; + unsigned int map_devmin; + uint64_t map_inode; + + // Short circuit test: Look for a slash + if (!strchr(buffer, '/')) + continue; + + // Parse format: "%Lx-%Lx %4s %x %2x:%2x %Ld" + char* readptr = buffer; + + map_start = fast_strtoull_hex(&readptr, 16); + if ('-' != *readptr++) + continue; + + map_end = fast_strtoull_hex(&readptr, 16); + if (' ' != *readptr++) + continue; + + map_execute = (readptr[2] == 'x'); + readptr += 4; + if (' ' != *readptr++) + continue; + + while (*readptr > ' ') + readptr++; // Skip parsing this hex value + if (' ' != *readptr++) + continue; + + map_devmaj = fast_strtoull_hex(&readptr, 4); + if (':' != *readptr++) + continue; + + map_devmin = fast_strtoull_hex(&readptr, 4); + if (' ' != *readptr++) + continue; + + //Minor shortcut: Once we know there's no file for this region, we skip + if (!map_devmaj && !map_devmin) + continue; + + map_inode = fast_strtoull_dec(&readptr, 20); + if (!map_inode) + continue; + + if (calcSize) { + LibraryData* libdata = Hashtable_get(ht, map_inode); + if (!libdata) { + libdata = xCalloc(1, sizeof(LibraryData)); + Hashtable_put(ht, map_inode, libdata); + } + + libdata->size += map_end - map_start; + libdata->exec |= map_execute; + } + + if (checkDeletedLib && map_execute && !proc->usesDeletedLib) { + while (*readptr == ' ') + readptr++; + + if (*readptr != '/') + continue; + + if (String_startsWith(readptr, "/memfd:")) + continue; + + /* Virtualbox maps /dev/zero for memory allocation. That results in + * false positive, so ignore. */ + if (String_eq(readptr, "/dev/zero (deleted)\n")) + continue; + + if (strstr(readptr, " (deleted)\n")) { + proc->usesDeletedLib = true; + if (!calcSize) + break; + } + } + } + + fclose(mapsfile); + + if (calcSize) { + uint64_t total_size = 0; + Hashtable_foreach(ht, LinuxProcessList_calcLibSize_helper, &total_size); + + Hashtable_delete(ht); + + process->m_lrs = total_size / pageSize; + } +} + +static bool LinuxProcessList_readStatmFile(LinuxProcess* process, openat_arg_t procFd) { + FILE* statmfile = fopenat(procFd, "statm", "r"); + if (!statmfile) + return false; + + long int dummy, dummy2; + + int r = fscanf(statmfile, "%ld %ld %ld %ld %ld %ld %ld", + &process->super.m_virt, + &process->super.m_resident, + &process->m_share, + &process->m_trs, + &dummy, /* unused since Linux 2.6; always 0 */ + &process->m_drs, + &dummy2); /* unused since Linux 2.6; always 0 */ + fclose(statmfile); + + if (r == 7) { + process->super.m_virt *= pageSizeKB; + process->super.m_resident *= pageSizeKB; + } + + return r == 7; +} + +static bool LinuxProcessList_checkPidNamespace(Process* process, openat_arg_t procFd) { + FILE* statusfile = fopenat(procFd, "status", "r"); + if (!statusfile) + return false; + + while (true) { + char buffer[PROC_LINE_LENGTH + 1]; + if (fgets(buffer, sizeof(buffer), statusfile) == NULL) + break; + + if (!String_startsWith(buffer, "NSpid:")) + continue; + + char* ptr = buffer; + int pid_ns_count = 0; + while (*ptr && *ptr != '\n' && !isdigit(*ptr)) + ++ptr; + + while (*ptr && *ptr != '\n') { + if (isdigit(*ptr)) + pid_ns_count++; + while (isdigit(*ptr)) + ++ptr; + while (*ptr && *ptr != '\n' && !isdigit(*ptr)) + ++ptr; + } + + if (pid_ns_count > 1) + process->isRunningInContainer = true; + + break; + } + + fclose(statusfile); + return true; +} + +static bool LinuxProcessList_readSmapsFile(LinuxProcess* process, openat_arg_t procFd, bool haveSmapsRollup) { + //http://elixir.free-electrons.com/linux/v4.10/source/fs/proc/task_mmu.c#L719 + //kernel will return data in chunks of size PAGE_SIZE or less. + FILE* f = fopenat(procFd, haveSmapsRollup ? "smaps_rollup" : "smaps", "r"); + if (!f) + return false; + + process->m_pss = 0; + process->m_swap = 0; + process->m_psswp = 0; + + char buffer[256]; + while (fgets(buffer, sizeof(buffer), f)) { + if (!strchr(buffer, '\n')) { + // Partial line, skip to end of this line + while (fgets(buffer, sizeof(buffer), f)) { + if (strchr(buffer, '\n')) { + break; + } + } + continue; + } + + if (String_startsWith(buffer, "Pss:")) { + process->m_pss += strtol(buffer + 4, NULL, 10); + } else if (String_startsWith(buffer, "Swap:")) { + process->m_swap += strtol(buffer + 5, NULL, 10); + } else if (String_startsWith(buffer, "SwapPss:")) { + process->m_psswp += strtol(buffer + 8, NULL, 10); + } + } + + fclose(f); + return true; +} + +#ifdef HAVE_OPENVZ + +static void LinuxProcessList_readOpenVZData(LinuxProcess* process, openat_arg_t procFd) { + if (access(PROCDIR "/vz", R_OK) != 0) { + free(process->ctid); + process->ctid = NULL; + process->vpid = process->super.pid; + return; + } + + FILE* file = fopenat(procFd, "status", "r"); + if (!file) { + free(process->ctid); + process->ctid = NULL; + process->vpid = process->super.pid; + return; + } + + bool foundEnvID = false; + bool foundVPid = false; + char linebuf[256]; + while (fgets(linebuf, sizeof(linebuf), file) != NULL) { + if (strchr(linebuf, '\n') == NULL) { + // Partial line, skip to end of this line + while (fgets(linebuf, sizeof(linebuf), file) != NULL) { + if (strchr(linebuf, '\n') != NULL) { + break; + } + } + continue; + } + + char* name_value_sep = strchr(linebuf, ':'); + if (name_value_sep == NULL) { + continue; + } + + int field; + if (0 == strncasecmp(linebuf, "envID", name_value_sep - linebuf)) { + field = 1; + } else if (0 == strncasecmp(linebuf, "VPid", name_value_sep - linebuf)) { + field = 2; + } else { + continue; + } + + do { + name_value_sep++; + } while (*name_value_sep != '\0' && *name_value_sep <= 32); + + char* value_end = name_value_sep; + + while (*value_end > 32) { + value_end++; + } + + if (name_value_sep == value_end) { + continue; + } + + *value_end = '\0'; + + switch (field) { + case 1: + foundEnvID = true; + if (!String_eq(name_value_sep, process->ctid ? process->ctid : "")) + free_and_xStrdup(&process->ctid, name_value_sep); + break; + case 2: + foundVPid = true; + process->vpid = strtoul(name_value_sep, NULL, 0); + break; + default: + //Sanity Check: Should never reach here, or the implementation is missing something! + assert(false && "OpenVZ handling: Unimplemented case for field handling reached."); + } + } + + fclose(file); + + if (!foundEnvID) { + free(process->ctid); + process->ctid = NULL; + } + + if (!foundVPid) { + process->vpid = process->super.pid; + } +} + +#endif + +static bool isContainerOrVMSlice(char* cgroup) { + if (String_startsWith(cgroup, "/user") || String_startsWith(cgroup, "/system")) + return false; + + return true; +} + +static void LinuxProcessList_readCGroupFile(LinuxProcess* process, openat_arg_t procFd) { + FILE* file = fopenat(procFd, "cgroup", "r"); + if (!file) { + if (process->cgroup) { + free(process->cgroup); + process->cgroup = NULL; + } + if (process->cgroup_short) { + free(process->cgroup_short); + process->cgroup_short = NULL; + } + return; + } + char output[PROC_LINE_LENGTH + 1]; + output[0] = '\0'; + char* at = output; + int left = PROC_LINE_LENGTH; + while (!feof(file) && left > 0) { + char buffer[PROC_LINE_LENGTH + 1]; + const char* ok = fgets(buffer, PROC_LINE_LENGTH, file); + if (!ok) + break; + + char* group = buffer; + for (size_t i = 0; i < 2; i++) { + group = strchrnul(group, ':'); + if (!*group) + break; + group++; + } + + char* eol = strchrnul(group, '\n'); + *eol = '\0'; + + if (at != output) { + *at = ';'; + at++; + left--; + } + int wrote = snprintf(at, left, "%s", group); + left -= wrote; + } + fclose(file); + + bool changed = !process->cgroup || !String_eq(process->cgroup, output); + + Process_updateFieldWidth(CGROUP, strlen(output)); + free_and_xStrdup(&process->cgroup, output); + + if (!changed) { + if (process->cgroup_short) { + Process_updateFieldWidth(CCGROUP, strlen(process->cgroup_short)); + } else { + //CCGROUP is alias to normal CGROUP if shortening fails + Process_updateFieldWidth(CCGROUP, strlen(process->cgroup)); + } + return; + } + + char* cgroup_short = CGroup_filterName(process->cgroup); + if (cgroup_short) { + Process_updateFieldWidth(CCGROUP, strlen(cgroup_short)); + free_and_xStrdup(&process->cgroup_short, cgroup_short); + free(cgroup_short); + } else { + //CCGROUP is alias to normal CGROUP if shortening fails + Process_updateFieldWidth(CCGROUP, strlen(process->cgroup)); + free(process->cgroup_short); + process->cgroup_short = NULL; + } +} + +#ifdef HAVE_VSERVER + +static void LinuxProcessList_readVServerData(LinuxProcess* process, openat_arg_t procFd) { + FILE* file = fopenat(procFd, "status", "r"); + if (!file) + return; + + char buffer[PROC_LINE_LENGTH + 1]; + process->vxid = 0; + while (fgets(buffer, PROC_LINE_LENGTH, file)) { + if (String_startsWith(buffer, "VxID:")) { + int vxid; + int ok = sscanf(buffer, "VxID:\t%32d", &vxid); + if (ok >= 1) { + process->vxid = vxid; + } + } + #if defined HAVE_ANCIENT_VSERVER + else if (String_startsWith(buffer, "s_context:")) { + int vxid; + int ok = sscanf(buffer, "s_context:\t%32d", &vxid); + if (ok >= 1) { + process->vxid = vxid; + } + } + #endif + } + fclose(file); +} + +#endif + +static void LinuxProcessList_readOomData(LinuxProcess* process, openat_arg_t procFd) { + FILE* file = fopenat(procFd, "oom_score", "r"); + if (!file) + return; + + char buffer[PROC_LINE_LENGTH + 1]; + if (fgets(buffer, PROC_LINE_LENGTH, file)) { + unsigned int oom; + int ok = sscanf(buffer, "%u", &oom); + if (ok >= 1) { + process->oom = oom; + } + } + fclose(file); +} + +static void LinuxProcessList_readAutogroup(LinuxProcess* process, openat_arg_t procFd) { + process->autogroup_id = -1; + + char autogroup[64]; // space for two numeric values and fixed length strings + ssize_t amtRead = xReadfileat(procFd, "autogroup", autogroup, sizeof(autogroup)); + if (amtRead < 0) + return; + + long int identity; + int nice; + int ok = sscanf(autogroup, "/autogroup-%ld nice %d", &identity, &nice); + if (ok == 2) { + process->autogroup_id = identity; + process->autogroup_nice = nice; + } +} + +static void LinuxProcessList_readCtxtData(LinuxProcess* process, openat_arg_t procFd) { + FILE* file = fopenat(procFd, "status", "r"); + if (!file) + return; + + char buffer[PROC_LINE_LENGTH + 1]; + unsigned long ctxt = 0; + while (fgets(buffer, PROC_LINE_LENGTH, file)) { + if (String_startsWith(buffer, "voluntary_ctxt_switches:")) { + unsigned long vctxt; + int ok = sscanf(buffer, "voluntary_ctxt_switches:\t%lu", &vctxt); + if (ok >= 1) { + ctxt += vctxt; + } + } else if (String_startsWith(buffer, "nonvoluntary_ctxt_switches:")) { + unsigned long nvctxt; + int ok = sscanf(buffer, "nonvoluntary_ctxt_switches:\t%lu", &nvctxt); + if (ok >= 1) { + ctxt += nvctxt; + } + } + } + fclose(file); + process->ctxt_diff = (ctxt > process->ctxt_total) ? (ctxt - process->ctxt_total) : 0; + process->ctxt_total = ctxt; +} + +static void LinuxProcessList_readSecattrData(LinuxProcess* process, openat_arg_t procFd) { + FILE* file = fopenat(procFd, "attr/current", "r"); + if (!file) { + free(process->secattr); + process->secattr = NULL; + return; + } + + char buffer[PROC_LINE_LENGTH + 1]; + const char* res = fgets(buffer, sizeof(buffer), file); + fclose(file); + if (!res) { + free(process->secattr); + process->secattr = NULL; + return; + } + char* newline = strchr(buffer, '\n'); + if (newline) { + *newline = '\0'; + } + + Process_updateFieldWidth(SECATTR, strlen(buffer)); + + if (process->secattr && String_eq(process->secattr, buffer)) { + return; + } + free_and_xStrdup(&process->secattr, buffer); +} + +static void LinuxProcessList_readCwd(LinuxProcess* process, openat_arg_t procFd) { + char pathBuffer[PATH_MAX + 1] = {0}; + +#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT) + ssize_t r = readlinkat(procFd, "cwd", pathBuffer, sizeof(pathBuffer) - 1); +#else + ssize_t r = Compat_readlink(procFd, "cwd", pathBuffer, sizeof(pathBuffer) - 1); +#endif + + if (r < 0) { + free(process->super.procCwd); + process->super.procCwd = NULL; + return; + } + + pathBuffer[r] = '\0'; + + if (process->super.procCwd && String_eq(process->super.procCwd, pathBuffer)) + return; + + free_and_xStrdup(&process->super.procCwd, pathBuffer); +} + +#ifdef HAVE_DELAYACCT + +static int handleNetlinkMsg(struct nl_msg* nlmsg, void* linuxProcess) { + struct nlmsghdr* nlhdr; + struct nlattr* nlattrs[TASKSTATS_TYPE_MAX + 1]; + const struct nlattr* nlattr; + struct taskstats stats; + int rem; + LinuxProcess* lp = (LinuxProcess*) linuxProcess; + + nlhdr = nlmsg_hdr(nlmsg); + + if (genlmsg_parse(nlhdr, 0, nlattrs, TASKSTATS_TYPE_MAX, NULL) < 0) { + return NL_SKIP; + } + + if ((nlattr = nlattrs[TASKSTATS_TYPE_AGGR_PID]) || (nlattr = nlattrs[TASKSTATS_TYPE_NULL])) { + memcpy(&stats, nla_data(nla_next(nla_data(nlattr), &rem)), sizeof(stats)); + assert(lp->super.pid == (pid_t)stats.ac_pid); + + unsigned long long int timeDelta = stats.ac_etime * 1000 - lp->delay_read_time; + #define BOUNDS(x) (isnan(x) ? 0.0 : ((x) > 100) ? 100.0 : (x)) + #define DELTAPERC(x,y) BOUNDS((float) ((x) - (y)) / timeDelta * 100) + lp->cpu_delay_percent = DELTAPERC(stats.cpu_delay_total, lp->cpu_delay_total); + lp->blkio_delay_percent = DELTAPERC(stats.blkio_delay_total, lp->blkio_delay_total); + lp->swapin_delay_percent = DELTAPERC(stats.swapin_delay_total, lp->swapin_delay_total); + #undef DELTAPERC + #undef BOUNDS + + lp->swapin_delay_total = stats.swapin_delay_total; + lp->blkio_delay_total = stats.blkio_delay_total; + lp->cpu_delay_total = stats.cpu_delay_total; + lp->delay_read_time = stats.ac_etime * 1000; + } + return NL_OK; +} + +static void LinuxProcessList_readDelayAcctData(LinuxProcessList* this, LinuxProcess* process) { + struct nl_msg* msg; + + if (!this->netlink_socket) { + LinuxProcessList_initNetlinkSocket(this); + if (!this->netlink_socket) { + goto delayacct_failure; + } + } + + if (nl_socket_modify_cb(this->netlink_socket, NL_CB_VALID, NL_CB_CUSTOM, handleNetlinkMsg, process) < 0) { + goto delayacct_failure; + } + + if (! (msg = nlmsg_alloc())) { + goto delayacct_failure; + } + + if (! genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, this->netlink_family, 0, NLM_F_REQUEST, TASKSTATS_CMD_GET, TASKSTATS_VERSION)) { + nlmsg_free(msg); + } + + if (nla_put_u32(msg, TASKSTATS_CMD_ATTR_PID, process->super.pid) < 0) { + nlmsg_free(msg); + } + + if (nl_send_sync(this->netlink_socket, msg) < 0) { + goto delayacct_failure; + } + + if (nl_recvmsgs_default(this->netlink_socket) < 0) { + goto delayacct_failure; + } + + return; + +delayacct_failure: + process->swapin_delay_percent = NAN; + process->blkio_delay_percent = NAN; + process->cpu_delay_percent = NAN; +} + +#endif + +static bool LinuxProcessList_readCmdlineFile(Process* process, openat_arg_t procFd) { + char command[4096 + 1]; // max cmdline length on Linux + ssize_t amtRead = xReadfileat(procFd, "cmdline", command, sizeof(command)); + if (amtRead <= 0) + return false; + + int tokenEnd = 0; + int tokenStart = 0; + int lastChar = 0; + bool argSepNUL = false; + bool argSepSpace = false; + + for (int i = 0; i < amtRead; i++) { + /* newline used as delimiter - when forming the mergedCommand, newline is + * converted to space by Process_makeCommandStr */ + if (command[i] == '\0') { + command[i] = '\n'; + } else { + /* Record some information for the argument parsing heuristic below. */ + if (tokenEnd) + argSepNUL = true; + if (command[i] <= ' ') + argSepSpace = true; + } + + if (command[i] == '\n') { + if (tokenEnd == 0) { + tokenEnd = i; + } + } else { + /* htop considers the next character after the last / that is before + * basenameOffset, as the start of the basename in cmdline - see + * Process_writeCommand */ + if (!tokenEnd && command[i] == '/') { + tokenStart = i + 1; + } + lastChar = i; + } + } + + command[lastChar + 1] = '\0'; + + if (!argSepNUL && argSepSpace) { + /* Argument parsing heuristic. + * + * This heuristic is used for processes that rewrite their command line. + * Normally the command line is split by using NUL bytes between each argument. + * But some programs like chrome flatten this using spaces. + * + * This heuristic tries its best to undo this loss of information. + * To achieve this, we treat every character <= 32 as argument separators + * (i.e. all of ASCII control sequences and space). + * We then search for the basename of the cmdline in the first argument we found that way. + * As path names may contain we try to cross-validate if the path we got that way exists. + */ + + tokenStart = tokenEnd = 0; + + // From initial scan we know there's at least one space. + // Check if that's part of a filename for an existing file. + if (Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) != 0) { + // If we reach here the path does not exist. + // Thus begin searching for the part of it that actually is. + + int tokenArg0Start = 0; + + for (int i = 0; i <= lastChar; i++) { + /* Any ASCII control or space used as delimiter */ + char tmpCommandChar = command[i]; + + if (command[i] <= ' ') { + if (!tokenEnd) { + command[i] = '\0'; + + bool found = Compat_faccessat(AT_FDCWD, command, F_OK, AT_SYMLINK_NOFOLLOW) == 0; + + // Restore if this wasn't it + command[i] = found ? '\n' : tmpCommandChar; + + if (found) + tokenEnd = i; + if (!tokenArg0Start) + tokenArg0Start = tokenStart; + } else { + // Split on every further separator, regardless of path correctness + command[i] = '\n'; + } + } else if (!tokenEnd) { + if (command[i] == '/' || (command[i] == '\\' && (!tokenStart || command[tokenStart - 1] == '\\'))) { + tokenStart = i + 1; + } else if (command[i] == ':' && (command[i + 1] != '/' && command[i + 1] != '\\')) { + tokenEnd = i; + } + } + } + + if (!tokenEnd) { + tokenStart = tokenArg0Start; + + // No token delimiter found, forcibly split + for (int i = 0; i <= lastChar; i++) { + if (command[i] <= ' ') { + command[i] = '\n'; + if (!tokenEnd) { + tokenEnd = i; + } + } + } + } + } + + /* Some command lines are hard to parse, like + * file.so [kdeinit5] file local:/run/user/1000/klauncherdqbouY.1.slave-socket local:/run/user/1000/kded5TwsDAx.1.slave-socket + * Reset if start is behind end. + */ + if (tokenStart >= tokenEnd) + tokenStart = tokenEnd = 0; + } + + if (tokenEnd == 0) { + tokenEnd = lastChar + 1; + } + + Process_updateCmdline(process, command, tokenStart, tokenEnd); + + /* /proc/[pid]/comm could change, so should be updated */ + if ((amtRead = xReadfileat(procFd, "comm", command, sizeof(command))) > 0) { + command[amtRead - 1] = '\0'; + Process_updateComm(process, command); + } else { + Process_updateComm(process, NULL); + } + + char filename[MAX_NAME + 1]; + + /* execve could change /proc/[pid]/exe, so procExe should be updated */ +#if defined(HAVE_READLINKAT) && defined(HAVE_OPENAT) + amtRead = readlinkat(procFd, "exe", filename, sizeof(filename) - 1); +#else + amtRead = Compat_readlink(procFd, "exe", filename, sizeof(filename) - 1); +#endif + if (amtRead > 0) { + filename[amtRead] = 0; + if (!process->procExe || + (!process->procExeDeleted && !String_eq(filename, process->procExe)) || + process->procExeDeleted) { + + const char* deletedMarker = " (deleted)"; + const size_t markerLen = strlen(deletedMarker); + const size_t filenameLen = strlen(filename); + + if (filenameLen > markerLen) { + bool oldExeDeleted = process->procExeDeleted; + + process->procExeDeleted = String_eq(filename + filenameLen - markerLen, deletedMarker); + + if (process->procExeDeleted) + filename[filenameLen - markerLen] = '\0'; + + if (oldExeDeleted != process->procExeDeleted) + process->mergedCommand.lastUpdate = 0; + } + + Process_updateExe(process, filename); + } + } else if (process->procExe) { + Process_updateExe(process, NULL); + process->procExeDeleted = false; + } + + return true; +} + +static char* LinuxProcessList_updateTtyDevice(TtyDriver* ttyDrivers, unsigned long int tty_nr) { + unsigned int maj = major(tty_nr); + unsigned int min = minor(tty_nr); + + int i = -1; + for (;;) { + i++; + if ((!ttyDrivers[i].path) || maj < ttyDrivers[i].major) { + break; + } + if (maj > ttyDrivers[i].major) { + continue; + } + if (min < ttyDrivers[i].minorFrom) { + break; + } + if (min > ttyDrivers[i].minorTo) { + continue; + } + unsigned int idx = min - ttyDrivers[i].minorFrom; + struct stat sstat; + char* fullPath; + for (;;) { + xAsprintf(&fullPath, "%s/%d", ttyDrivers[i].path, idx); + int err = stat(fullPath, &sstat); + if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) { + return fullPath; + } + free(fullPath); + + xAsprintf(&fullPath, "%s%d", ttyDrivers[i].path, idx); + err = stat(fullPath, &sstat); + if (err == 0 && major(sstat.st_rdev) == maj && minor(sstat.st_rdev) == min) { + return fullPath; + } + free(fullPath); + + if (idx == min) { + break; + } + + idx = min; + } + int err = stat(ttyDrivers[i].path, &sstat); + if (err == 0 && tty_nr == sstat.st_rdev) { + return xStrdup(ttyDrivers[i].path); + } + } + char* out; + xAsprintf(&out, "/dev/%u:%u", maj, min); + return out; +} + +static bool isOlderThan(const ProcessList* pl, const Process* proc, unsigned int seconds) { + assert(pl->realtimeMs > 0); + + /* Starttime might not yet be parsed */ + if (proc->starttime_ctime <= 0) + return false; + + uint64_t realtime = pl->realtimeMs / 1000; + + if (realtime < (uint64_t)proc->starttime_ctime) + return false; + + return realtime - proc->starttime_ctime > seconds; +} + +static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_t parentFd, const char* dirname, const Process* parent, double period) { + ProcessList* pl = (ProcessList*) this; + const struct dirent* entry; + const Settings* settings = pl->settings; + const ScreenSettings* ss = settings->ss; + +#ifdef HAVE_OPENAT + int dirFd = openat(parentFd, dirname, O_RDONLY | O_DIRECTORY | O_NOFOLLOW); + if (dirFd < 0) + return false; + DIR* dir = fdopendir(dirFd); +#else + char dirFd[4096]; + xSnprintf(dirFd, sizeof(dirFd), "%s/%s", parentFd, dirname); + DIR* dir = opendir(dirFd); +#endif + if (!dir) { + Compat_openatArgClose(dirFd); + return false; + } + + const unsigned int activeCPUs = pl->activeCPUs; + const bool hideKernelThreads = settings->hideKernelThreads; + const bool hideUserlandThreads = settings->hideUserlandThreads; + const bool hideRunningInContainer = settings->hideRunningInContainer; + while ((entry = readdir(dir)) != NULL) { + const char* name = entry->d_name; + + // Ignore all non-directories + if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN) { + continue; + } + + // The RedHat kernel hides threads with a dot. + // I believe this is non-standard. + if (name[0] == '.') { + name++; + } + + // Just skip all non-number directories. + if (name[0] < '0' || name[0] > '9') { + continue; + } + + // filename is a number: process directory + int pid; + { + char* endptr; + unsigned long parsedPid = strtoul(name, &endptr, 10); + if (parsedPid == 0 || parsedPid == ULONG_MAX || *endptr != '\0') + continue; + pid = parsedPid; + } + + // Skip task directory of main thread + if (parent && pid == parent->pid) + continue; + +#ifdef HAVE_OPENAT + int procFd = openat(dirFd, entry->d_name, O_RDONLY | O_DIRECTORY | O_NOFOLLOW); + if (procFd < 0) + continue; +#else + char procFd[4096]; + xSnprintf(procFd, sizeof(procFd), "%s/%s", dirFd, entry->d_name); +#endif + + bool preExisting; + Process* proc = ProcessList_getProcess(pl, pid, &preExisting, LinuxProcess_new); + LinuxProcess* lp = (LinuxProcess*) proc; + + proc->tgid = parent ? parent->pid : pid; + proc->isUserlandThread = proc->pid != proc->tgid; + + LinuxProcessList_recurseProcTree(this, procFd, "task", proc, period); + + if (ss->flags & PROCESS_FLAG_LINUX_CGROUP || hideRunningInContainer) { + LinuxProcessList_readCGroupFile(lp, procFd); + if (hideRunningInContainer && lp->cgroup && isContainerOrVMSlice(lp->cgroup)) { + if (!LinuxProcessList_checkPidNamespace(proc, procFd)) { + goto errorReadingProcess; + } + } + } + + /* + * These conditions will not trigger on first occurrence, cause we need to + * add the process to the ProcessList and do all one time scans + * (e.g. parsing the cmdline to detect a kernel thread) + * But it will short-circuit subsequent scans. + */ + if (preExisting && hideKernelThreads && Process_isKernelThread(proc)) { + proc->updated = true; + proc->show = false; + pl->kernelThreads++; + pl->totalTasks++; + Compat_openatArgClose(procFd); + continue; + } + if (preExisting && hideUserlandThreads && Process_isUserlandThread(proc)) { + proc->updated = true; + proc->show = false; + pl->userlandThreads++; + pl->totalTasks++; + Compat_openatArgClose(procFd); + continue; + } + if (preExisting && hideRunningInContainer && proc->isRunningInContainer) { + proc->updated = true; + proc->show = false; + Compat_openatArgClose(procFd); + continue; + } + + if (ss->flags & PROCESS_FLAG_IO) + LinuxProcessList_readIoFile(lp, procFd, pl->realtimeMs); + + if (!LinuxProcessList_readStatmFile(lp, procFd)) + goto errorReadingProcess; + + { + bool prev = proc->usesDeletedLib; + + if (!proc->isKernelThread && !proc->isUserlandThread && + ((ss->flags & PROCESS_FLAG_LINUX_LRS_FIX) || (settings->highlightDeletedExe && !proc->procExeDeleted && isOlderThan(pl, proc, 10)))) { + + // Check if we really should recalculate the M_LRS value for this process + uint64_t passedTimeInMs = pl->realtimeMs - lp->last_mlrs_calctime; + + uint64_t recheck = ((uint64_t)rand()) % 2048; + + if (passedTimeInMs > recheck) { + lp->last_mlrs_calctime = pl->realtimeMs; + LinuxProcessList_readMaps(lp, procFd, ss->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe); + } + } else { + /* Copy from process structure in threads and reset if setting got disabled */ + proc->usesDeletedLib = (proc->isUserlandThread && parent) ? parent->usesDeletedLib : false; + lp->m_lrs = (proc->isUserlandThread && parent) ? ((const LinuxProcess*)parent)->m_lrs : 0; + } + + if (prev != proc->usesDeletedLib) + proc->mergedCommand.lastUpdate = 0; + } + + if ((ss->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) { + if (!parent) { + // Read smaps file of each process only every second pass to improve performance + static int smaps_flag = 0; + if ((pid & 1) == smaps_flag) { + LinuxProcessList_readSmapsFile(lp, procFd, this->haveSmapsRollup); + } + if (pid == 1) { + smaps_flag = !smaps_flag; + } + } else { + lp->m_pss = ((const LinuxProcess*)parent)->m_pss; + } + } + + char statCommand[MAX_NAME + 1]; + unsigned long long int lasttimes = (lp->utime + lp->stime); + unsigned long int tty_nr = proc->tty_nr; + if (!LinuxProcessList_readStatFile(proc, procFd, statCommand, sizeof(statCommand))) + goto errorReadingProcess; + + if (lp->flags & PF_KTHREAD) { + proc->isKernelThread = true; + } + + if (tty_nr != proc->tty_nr && this->ttyDrivers) { + free(proc->tty_name); + proc->tty_name = LinuxProcessList_updateTtyDevice(this->ttyDrivers, proc->tty_nr); + } + + if (ss->flags & PROCESS_FLAG_LINUX_IOPRIO) { + LinuxProcess_updateIOPriority(lp); + } + + /* period might be 0 after system sleep */ + float percent_cpu = (period < 1E-6) ? 0.0F : ((lp->utime + lp->stime - lasttimes) / period * 100.0); + proc->percent_cpu = CLAMP(percent_cpu, 0.0F, activeCPUs * 100.0F); + proc->percent_mem = proc->m_resident / (double)(pl->totalMem) * 100.0; + Process_updateCPUFieldWidths(proc->percent_cpu); + + if (! LinuxProcessList_updateUser(pl, proc, procFd)) + goto errorReadingProcess; + + if (!preExisting) { + + #ifdef HAVE_OPENVZ + if (ss->flags & PROCESS_FLAG_LINUX_OPENVZ) { + LinuxProcessList_readOpenVZData(lp, procFd); + } + #endif + + #ifdef HAVE_VSERVER + if (ss->flags & PROCESS_FLAG_LINUX_VSERVER) { + LinuxProcessList_readVServerData(lp, procFd); + } + #endif + + if (proc->isKernelThread) { + Process_updateCmdline(proc, NULL, 0, 0); + } else if (!LinuxProcessList_readCmdlineFile(proc, procFd)) { + Process_updateCmdline(proc, statCommand, 0, strlen(statCommand)); + } + + Process_fillStarttimeBuffer(proc); + + ProcessList_add(pl, proc); + } else { + if (settings->updateProcessNames && proc->state != ZOMBIE) { + if (proc->isKernelThread) { + Process_updateCmdline(proc, NULL, 0, 0); + } else if (!LinuxProcessList_readCmdlineFile(proc, procFd)) { + Process_updateCmdline(proc, statCommand, 0, strlen(statCommand)); + } + } + } + + #ifdef HAVE_DELAYACCT + if (ss->flags & PROCESS_FLAG_LINUX_DELAYACCT) { + LinuxProcessList_readDelayAcctData(this, lp); + } + #endif + + if (ss->flags & PROCESS_FLAG_LINUX_OOM) { + LinuxProcessList_readOomData(lp, procFd); + } + + if (ss->flags & PROCESS_FLAG_LINUX_CTXT) { + LinuxProcessList_readCtxtData(lp, procFd); + } + + if (ss->flags & PROCESS_FLAG_LINUX_SECATTR) { + LinuxProcessList_readSecattrData(lp, procFd); + } + + if (ss->flags & PROCESS_FLAG_CWD) { + LinuxProcessList_readCwd(lp, procFd); + } + + if ((ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) { + LinuxProcessList_readAutogroup(lp, procFd); + } + + if (!proc->cmdline && statCommand[0] && + (proc->state == ZOMBIE || Process_isKernelThread(proc) || settings->showThreadNames)) { + Process_updateCmdline(proc, statCommand, 0, strlen(statCommand)); + } + + if (Process_isKernelThread(proc)) { + pl->kernelThreads++; + } else if (Process_isUserlandThread(proc)) { + pl->userlandThreads++; + } + + /* Set at the end when we know if a new entry is a thread */ + proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc))); + + pl->totalTasks++; + /* runningTasks is set in LinuxProcessList_scanCPUTime() from /proc/stat */ + proc->updated = true; + Compat_openatArgClose(procFd); + continue; + + // Exception handler. + +errorReadingProcess: + { +#ifdef HAVE_OPENAT + if (procFd >= 0) + close(procFd); +#endif + + if (preExisting) { + /* + * The only real reason for coming here (apart from Linux violating the /proc API) + * would be the process going away with its /proc files disappearing (!HAVE_OPENAT). + * However, we want to keep in the process list for now for the "highlight dying" mode. + */ + } else { + /* A really short-lived process that we don't have full info about */ + Process_delete((Object*)proc); + } + } + } + closedir(dir); + return true; +} + +static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) { + memory_t availableMem = 0; + memory_t freeMem = 0; + memory_t totalMem = 0; + memory_t buffersMem = 0; + memory_t cachedMem = 0; + memory_t sharedMem = 0; + memory_t swapTotalMem = 0; + memory_t swapCacheMem = 0; + memory_t swapFreeMem = 0; + memory_t sreclaimableMem = 0; + + FILE* file = fopen(PROCMEMINFOFILE, "r"); + if (!file) + CRT_fatalError("Cannot open " PROCMEMINFOFILE); + + char buffer[128]; + while (fgets(buffer, sizeof(buffer), file)) { + + #define tryRead(label, variable) \ + if (String_startsWith(buffer, label)) { \ + memory_t parsed_; \ + if (sscanf(buffer + strlen(label), "%llu kB", &parsed_) == 1) { \ + (variable) = parsed_; \ + } \ + break; \ + } else (void) 0 /* Require a ";" after the macro use. */ + + switch (buffer[0]) { + case 'M': + tryRead("MemAvailable:", availableMem); + tryRead("MemFree:", freeMem); + tryRead("MemTotal:", totalMem); + break; + case 'B': + tryRead("Buffers:", buffersMem); + break; + case 'C': + tryRead("Cached:", cachedMem); + break; + case 'S': + switch (buffer[1]) { + case 'h': + tryRead("Shmem:", sharedMem); + break; + case 'w': + tryRead("SwapTotal:", swapTotalMem); + tryRead("SwapCached:", swapCacheMem); + tryRead("SwapFree:", swapFreeMem); + break; + case 'R': + tryRead("SReclaimable:", sreclaimableMem); + break; + } + break; + } + + #undef tryRead + } + + fclose(file); + + /* + * Compute memory partition like procps(free) + * https://gitlab.com/procps-ng/procps/-/blob/master/proc/sysinfo.c + * + * Adjustments: + * - Shmem in part of Cached (see https://lore.kernel.org/patchwork/patch/648763/), + * do not show twice by subtracting from Cached and do not subtract twice from used. + */ + this->totalMem = totalMem; + this->cachedMem = cachedMem + sreclaimableMem - sharedMem; + this->sharedMem = sharedMem; + const memory_t usedDiff = freeMem + cachedMem + sreclaimableMem + buffersMem; + this->usedMem = (totalMem >= usedDiff) ? totalMem - usedDiff : totalMem - freeMem; + this->buffersMem = buffersMem; + this->availableMem = availableMem != 0 ? MINIMUM(availableMem, totalMem) : freeMem; + this->totalSwap = swapTotalMem; + this->usedSwap = swapTotalMem - swapFreeMem - swapCacheMem; + this->cachedSwap = swapCacheMem; +} + +static void LinuxProcessList_scanHugePages(LinuxProcessList* this) { + this->totalHugePageMem = 0; + for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) { + this->usedHugePageMem[i] = MEMORY_MAX; + } + + DIR* dir = opendir("/sys/kernel/mm/hugepages"); + if (!dir) + return; + + const struct dirent* entry; + while ((entry = readdir(dir)) != NULL) { + const char* name = entry->d_name; + + /* Ignore all non-directories */ + if (entry->d_type != DT_DIR && entry->d_type != DT_UNKNOWN) + continue; + + if (!String_startsWith(name, "hugepages-")) + continue; + + char* endptr; + unsigned long int hugePageSize = strtoul(name + strlen("hugepages-"), &endptr, 10); + if (!endptr || *endptr != 'k') + continue; + + char content[64]; + char hugePagePath[128]; + ssize_t r; + + xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/nr_hugepages", name); + r = xReadfile(hugePagePath, content, sizeof(content)); + if (r <= 0) + continue; + + memory_t total = strtoull(content, NULL, 10); + if (total == 0) + continue; + + xSnprintf(hugePagePath, sizeof(hugePagePath), "/sys/kernel/mm/hugepages/%s/free_hugepages", name); + r = xReadfile(hugePagePath, content, sizeof(content)); + if (r <= 0) + continue; + + memory_t free = strtoull(content, NULL, 10); + + int shift = ffsl(hugePageSize) - 1 - (HTOP_HUGEPAGE_BASE_SHIFT - 10); + assert(shift >= 0 && shift < HTOP_HUGEPAGE_COUNT); + + this->totalHugePageMem += total * hugePageSize; + this->usedHugePageMem[shift] = (total - free) * hugePageSize; + } + + closedir(dir); +} + +static inline void LinuxProcessList_scanZramInfo(LinuxProcessList* this) { + memory_t totalZram = 0; + memory_t usedZramComp = 0; + memory_t usedZramOrig = 0; + + char mm_stat[34]; + char disksize[34]; + + unsigned int i = 0; + for (;;) { + xSnprintf(mm_stat, sizeof(mm_stat), "/sys/block/zram%u/mm_stat", i); + xSnprintf(disksize, sizeof(disksize), "/sys/block/zram%u/disksize", i); + i++; + FILE* disksize_file = fopen(disksize, "r"); + FILE* mm_stat_file = fopen(mm_stat, "r"); + if (disksize_file == NULL || mm_stat_file == NULL) { + if (disksize_file) { + fclose(disksize_file); + } + if (mm_stat_file) { + fclose(mm_stat_file); + } + break; + } + memory_t size = 0; + memory_t orig_data_size = 0; + memory_t compr_data_size = 0; + + if (!fscanf(disksize_file, "%llu\n", &size) || + !fscanf(mm_stat_file, " %llu %llu", &orig_data_size, &compr_data_size)) { + fclose(disksize_file); + fclose(mm_stat_file); + break; + } + + totalZram += size; + usedZramComp += compr_data_size; + usedZramOrig += orig_data_size; + + fclose(disksize_file); + fclose(mm_stat_file); + } + + this->zram.totalZram = totalZram / 1024; + this->zram.usedZramComp = usedZramComp / 1024; + this->zram.usedZramOrig = usedZramOrig / 1024; +} + +static inline void LinuxProcessList_scanZfsArcstats(LinuxProcessList* lpl) { + memory_t dbufSize = 0; + memory_t dnodeSize = 0; + memory_t bonusSize = 0; + + FILE* file = fopen(PROCARCSTATSFILE, "r"); + if (file == NULL) { + lpl->zfs.enabled = 0; + return; + } + char buffer[128]; + while (fgets(buffer, 128, file)) { + #define tryRead(label, variable) \ + if (String_startsWith(buffer, label)) { \ + sscanf(buffer + strlen(label), " %*2u %32llu", variable); \ + break; \ + } else (void) 0 /* Require a ";" after the macro use. */ + #define tryReadFlag(label, variable, flag) \ + if (String_startsWith(buffer, label)) { \ + (flag) = sscanf(buffer + strlen(label), " %*2u %32llu", variable); \ + break; \ + } else (void) 0 /* Require a ";" after the macro use. */ + + switch (buffer[0]) { + case 'c': + tryRead("c_min", &lpl->zfs.min); + tryRead("c_max", &lpl->zfs.max); + tryReadFlag("compressed_size", &lpl->zfs.compressed, lpl->zfs.isCompressed); + break; + case 'u': + tryRead("uncompressed_size", &lpl->zfs.uncompressed); + break; + case 's': + tryRead("size", &lpl->zfs.size); + break; + case 'h': + tryRead("hdr_size", &lpl->zfs.header); + break; + case 'd': + tryRead("dbuf_size", &dbufSize); + tryRead("dnode_size", &dnodeSize); + break; + case 'b': + tryRead("bonus_size", &bonusSize); + break; + case 'a': + tryRead("anon_size", &lpl->zfs.anon); + break; + case 'm': + tryRead("mfu_size", &lpl->zfs.MFU); + tryRead("mru_size", &lpl->zfs.MRU); + break; + } + #undef tryRead + #undef tryReadFlag + } + fclose(file); + + lpl->zfs.enabled = (lpl->zfs.size > 0 ? 1 : 0); + lpl->zfs.size /= 1024; + lpl->zfs.min /= 1024; + lpl->zfs.max /= 1024; + lpl->zfs.MFU /= 1024; + lpl->zfs.MRU /= 1024; + lpl->zfs.anon /= 1024; + lpl->zfs.header /= 1024; + lpl->zfs.other = (dbufSize + dnodeSize + bonusSize) / 1024; + if ( lpl->zfs.isCompressed ) { + lpl->zfs.compressed /= 1024; + lpl->zfs.uncompressed /= 1024; + } +} + +static inline double LinuxProcessList_scanCPUTime(ProcessList* super) { + LinuxProcessList* this = (LinuxProcessList*) super; + + LinuxProcessList_updateCPUcount(super); + + FILE* file = fopen(PROCSTATFILE, "r"); + if (!file) + CRT_fatalError("Cannot open " PROCSTATFILE); + + unsigned int existingCPUs = super->existingCPUs; + unsigned int lastAdjCpuId = 0; + + for (unsigned int i = 0; i <= existingCPUs; i++) { + char buffer[PROC_LINE_LENGTH + 1]; + unsigned long long int usertime, nicetime, systemtime, idletime; + unsigned long long int ioWait = 0, irq = 0, softIrq = 0, steal = 0, guest = 0, guestnice = 0; + + const char* ok = fgets(buffer, sizeof(buffer), file); + if (!ok) + break; + + // cpu fields are sorted first + if (!String_startsWith(buffer, "cpu")) + break; + + // Depending on your kernel version, + // 5, 7, 8 or 9 of these fields will be set. + // The rest will remain at zero. + unsigned int adjCpuId; + if (i == 0) { + (void) sscanf(buffer, "cpu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice); + adjCpuId = 0; + } else { + unsigned int cpuid; + (void) sscanf(buffer, "cpu%4u %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &cpuid, &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice); + adjCpuId = cpuid + 1; + } + + if (adjCpuId > super->existingCPUs) + break; + + for (unsigned int j = lastAdjCpuId + 1; j < adjCpuId; j++) { + // Skipped an ID, but /proc/stat is ordered => got offline CPU + memset(&(this->cpuData[j]), '\0', sizeof(CPUData)); + } + lastAdjCpuId = adjCpuId; + + // Guest time is already accounted in usertime + usertime -= guest; + nicetime -= guestnice; + // Fields existing on kernels >= 2.6 + // (and RHEL's patched kernel 2.4...) + unsigned long long int idlealltime = idletime + ioWait; + unsigned long long int systemalltime = systemtime + irq + softIrq; + unsigned long long int virtalltime = guest + guestnice; + unsigned long long int totaltime = usertime + nicetime + systemalltime + idlealltime + steal + virtalltime; + CPUData* cpuData = &(this->cpuData[adjCpuId]); + // Since we do a subtraction (usertime - guest) and cputime64_to_clock_t() + // used in /proc/stat rounds down numbers, it can lead to a case where the + // integer overflow. + cpuData->userPeriod = saturatingSub(usertime, cpuData->userTime); + cpuData->nicePeriod = saturatingSub(nicetime, cpuData->niceTime); + cpuData->systemPeriod = saturatingSub(systemtime, cpuData->systemTime); + cpuData->systemAllPeriod = saturatingSub(systemalltime, cpuData->systemAllTime); + cpuData->idleAllPeriod = saturatingSub(idlealltime, cpuData->idleAllTime); + cpuData->idlePeriod = saturatingSub(idletime, cpuData->idleTime); + cpuData->ioWaitPeriod = saturatingSub(ioWait, cpuData->ioWaitTime); + cpuData->irqPeriod = saturatingSub(irq, cpuData->irqTime); + cpuData->softIrqPeriod = saturatingSub(softIrq, cpuData->softIrqTime); + cpuData->stealPeriod = saturatingSub(steal, cpuData->stealTime); + cpuData->guestPeriod = saturatingSub(virtalltime, cpuData->guestTime); + cpuData->totalPeriod = saturatingSub(totaltime, cpuData->totalTime); + cpuData->userTime = usertime; + cpuData->niceTime = nicetime; + cpuData->systemTime = systemtime; + cpuData->systemAllTime = systemalltime; + cpuData->idleAllTime = idlealltime; + cpuData->idleTime = idletime; + cpuData->ioWaitTime = ioWait; + cpuData->irqTime = irq; + cpuData->softIrqTime = softIrq; + cpuData->stealTime = steal; + cpuData->guestTime = virtalltime; + cpuData->totalTime = totaltime; + } + + double period = (double)this->cpuData[0].totalPeriod / super->activeCPUs; + + char buffer[PROC_LINE_LENGTH + 1]; + while (fgets(buffer, sizeof(buffer), file)) { + if (String_startsWith(buffer, "procs_running")) { + super->runningTasks = strtoul(buffer + strlen("procs_running"), NULL, 10); + break; + } + } + + fclose(file); + + return period; +} + +static int scanCPUFrequencyFromSysCPUFreq(LinuxProcessList* this) { + unsigned int existingCPUs = this->super.existingCPUs; + int numCPUsWithFrequency = 0; + unsigned long totalFrequency = 0; + + /* + * On some AMD and Intel CPUs read()ing scaling_cur_freq is quite slow (> 1ms). This delay + * accumulates for every core. For details see issue#471. + * If the read on CPU 0 takes longer than 500us bail out and fall back to reading the + * frequencies from /proc/cpuinfo. + * Once the condition has been met, bail out early for the next couple of scans. + */ + static int timeout = 0; + + if (timeout > 0) { + timeout--; + return -1; + } + + for (unsigned int i = 0; i < existingCPUs; ++i) { + if (!ProcessList_isCPUonline(&this->super, i)) + continue; + + char pathBuffer[64]; + xSnprintf(pathBuffer, sizeof(pathBuffer), "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq", i); + + struct timespec start; + if (i == 0) + clock_gettime(CLOCK_MONOTONIC, &start); + + FILE* file = fopen(pathBuffer, "r"); + if (!file) + return -errno; + + unsigned long frequency; + if (fscanf(file, "%lu", &frequency) == 1) { + /* convert kHz to MHz */ + frequency = frequency / 1000; + this->cpuData[i + 1].frequency = frequency; + numCPUsWithFrequency++; + totalFrequency += frequency; + } + + fclose(file); + + if (i == 0) { + struct timespec end; + clock_gettime(CLOCK_MONOTONIC, &end); + const time_t timeTakenUs = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_nsec - start.tv_nsec) / 1000; + if (timeTakenUs > 500) { + timeout = 30; + return -1; + } + } + + } + + if (numCPUsWithFrequency > 0) + this->cpuData[0].frequency = (double)totalFrequency / numCPUsWithFrequency; + + return 0; +} + +static void scanCPUFrequencyFromCPUinfo(LinuxProcessList* this) { + FILE* file = fopen(PROCCPUINFOFILE, "r"); + if (file == NULL) + return; + + unsigned int existingCPUs = this->super.existingCPUs; + int numCPUsWithFrequency = 0; + double totalFrequency = 0; + int cpuid = -1; + + while (!feof(file)) { + double frequency; + char buffer[PROC_LINE_LENGTH]; + + if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL) + break; + + if (sscanf(buffer, "processor : %d", &cpuid) == 1) { + continue; + } else if ( + (sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) || + (sscanf(buffer, "clock : %lfMHz", &frequency) == 1) + ) { + if (cpuid < 0 || (unsigned int)cpuid > (existingCPUs - 1)) { + continue; + } + + CPUData* cpuData = &(this->cpuData[cpuid + 1]); + /* do not override sysfs data */ + if (isnan(cpuData->frequency)) { + cpuData->frequency = frequency; + } + numCPUsWithFrequency++; + totalFrequency += frequency; + } else if (buffer[0] == '\n') { + cpuid = -1; + } + } + fclose(file); + + if (numCPUsWithFrequency > 0) { + this->cpuData[0].frequency = totalFrequency / numCPUsWithFrequency; + } +} + +static void LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) { + unsigned int existingCPUs = this->super.existingCPUs; + + for (unsigned int i = 0; i <= existingCPUs; i++) { + this->cpuData[i].frequency = NAN; + } + + if (scanCPUFrequencyFromSysCPUFreq(this) == 0) { + return; + } + + scanCPUFrequencyFromCPUinfo(this); +} + +void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) { + LinuxProcessList* this = (LinuxProcessList*) super; + const Settings* settings = super->settings; + + LinuxProcessList_scanMemoryInfo(super); + LinuxProcessList_scanHugePages(this); + LinuxProcessList_scanZfsArcstats(this); + LinuxProcessList_scanZramInfo(this); + + double period = LinuxProcessList_scanCPUTime(super); + + if (settings->showCPUFrequency) { + LinuxProcessList_scanCPUFrequency(this); + } + + #ifdef HAVE_SENSORS_SENSORS_H + if (settings->showCPUTemperature) + LibSensors_getCPUTemperatures(this->cpuData, this->super.existingCPUs, this->super.activeCPUs); + #endif + + // in pause mode only gather global data for meters (CPU/memory/...) + if (pauseProcessUpdate) { + return; + } + + if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) { + // Refer to sched(7) 'autogroup feature' section + // The kernel feature can be enabled/disabled through procfs at + // any time, so check for it at the start of each sample - only + // read from per-process procfs files if it's globally enabled. + this->haveAutogroup = LinuxProcess_isAutogroupEnabled(); + } else { + this->haveAutogroup = false; + } + + /* PROCDIR is an absolute path */ + assert(PROCDIR[0] == '/'); +#ifdef HAVE_OPENAT + openat_arg_t rootFd = AT_FDCWD; +#else + openat_arg_t rootFd = ""; +#endif + + LinuxProcessList_recurseProcTree(this, rootFd, PROCDIR, NULL, period); +} + +bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id) { + assert(id < super->existingCPUs); + + const LinuxProcessList* this = (const LinuxProcessList*) super; + return this->cpuData[id + 1].online; +} |