summaryrefslogtreecommitdiffstats
path: root/daemon/daemon.c
diff options
context:
space:
mode:
Diffstat (limited to 'daemon/daemon.c')
-rw-r--r--daemon/daemon.c162
1 files changed, 98 insertions, 64 deletions
diff --git a/daemon/daemon.c b/daemon/daemon.c
index 2b8a6552b..0d1d17324 100644
--- a/daemon/daemon.c
+++ b/daemon/daemon.c
@@ -20,7 +20,7 @@ void get_netdata_execution_path(void)
exepath_size = sizeof(exepath) - 1;
ret = uv_exepath(exepath, &exepath_size);
if (0 != ret) {
- error("uv_exepath(\"%s\", %u) (user: %s) failed (%s).", exepath, (unsigned)exepath_size, user,
+ netdata_log_error("uv_exepath(\"%s\", %u) (user: %s) failed (%s).", exepath, (unsigned)exepath_size, user,
uv_strerror(ret));
fatal("Cannot start netdata without getting execution path.");
}
@@ -33,29 +33,49 @@ static void chown_open_file(int fd, uid_t uid, gid_t gid) {
struct stat buf;
if(fstat(fd, &buf) == -1) {
- error("Cannot fstat() fd %d", fd);
+ netdata_log_error("Cannot fstat() fd %d", fd);
return;
}
if((buf.st_uid != uid || buf.st_gid != gid) && S_ISREG(buf.st_mode)) {
if(fchown(fd, uid, gid) == -1)
- error("Cannot fchown() fd %d.", fd);
+ netdata_log_error("Cannot fchown() fd %d.", fd);
}
}
-void create_needed_dir(const char *dir, uid_t uid, gid_t gid)
+static void fix_directory_file_permissions(const char *dirname, uid_t uid, gid_t gid, bool recursive)
{
- // attempt to create the directory
- if(mkdir(dir, 0755) == 0) {
- // we created it
+ char filename[FILENAME_MAX + 1];
- // chown it to match the required user
- if(chown(dir, uid, gid) == -1)
- error("Cannot chown directory '%s' to %u:%u", dir, (unsigned int)uid, (unsigned int)gid);
+ DIR *dir = opendir(dirname);
+ if (!dir)
+ return;
+
+ struct dirent *de = NULL;
+
+ while ((de = readdir(dir))) {
+ if (de->d_type == DT_DIR && (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")))
+ continue;
+
+ (void) snprintfz(filename, FILENAME_MAX, "%s/%s", dirname, de->d_name);
+ if (de->d_type == DT_REG || recursive) {
+ if (chown(filename, uid, gid) == -1)
+ netdata_log_error("Cannot chown %s '%s' to %u:%u", de->d_type == DT_DIR ? "directory" : "file", filename, (unsigned int)uid, (unsigned int)gid);
+ }
+
+ if (de->d_type == DT_DIR && recursive)
+ fix_directory_file_permissions(filename, uid, gid, recursive);
}
- else if(errno != EEXIST)
- // log an error only if the directory does not exist
- error("Cannot create directory '%s'", dir);
+
+ closedir(dir);
+}
+
+void change_dir_ownership(const char *dir, uid_t uid, gid_t gid, bool recursive)
+{
+ if (chown(dir, uid, gid) == -1)
+ netdata_log_error("Cannot chown directory '%s' to %u:%u", dir, (unsigned int)uid, (unsigned int)gid);
+
+ fix_directory_file_permissions(dir, uid, gid, recursive);
}
void clean_directory(char *dirname)
@@ -69,33 +89,45 @@ void clean_directory(char *dirname)
while((de = readdir(dir)))
if(de->d_type == DT_REG)
if (unlinkat(dir_fd, de->d_name, 0))
- error("Cannot delete %s/%s", dirname, de->d_name);
+ netdata_log_error("Cannot delete %s/%s", dirname, de->d_name);
closedir(dir);
}
+void prepare_required_directories(uid_t uid, gid_t gid) {
+ change_dir_ownership(netdata_configured_cache_dir, uid, gid, true);
+ change_dir_ownership(netdata_configured_varlib_dir, uid, gid, false);
+ change_dir_ownership(netdata_configured_lock_dir, uid, gid, false);
+ change_dir_ownership(netdata_configured_log_dir, uid, gid, false);
+ change_dir_ownership(claimingdirectory, uid, gid, false);
+
+ char filename[FILENAME_MAX + 1];
+ snprintfz(filename, FILENAME_MAX, "%s/registry", netdata_configured_varlib_dir);
+ change_dir_ownership(filename, uid, gid, false);
+
+ clean_directory(netdata_configured_lock_dir);
+}
+
int become_user(const char *username, int pid_fd) {
int am_i_root = (getuid() == 0)?1:0;
struct passwd *pw = getpwnam(username);
if(!pw) {
- error("User %s is not present.", username);
+ netdata_log_error("User %s is not present.", username);
return -1;
}
uid_t uid = pw->pw_uid;
gid_t gid = pw->pw_gid;
- create_needed_dir(netdata_configured_cache_dir, uid, gid);
- create_needed_dir(netdata_configured_varlib_dir, uid, gid);
- create_needed_dir(netdata_configured_lock_dir, uid, gid);
- create_needed_dir(claimingdirectory, uid, gid);
+ if (am_i_root)
+ netdata_log_info("I am root, so checking permissions");
- clean_directory(netdata_configured_lock_dir);
+ prepare_required_directories(uid, gid);
if(pidfile[0]) {
if(chown(pidfile, uid, gid) == -1)
- error("Cannot chown '%s' to %u:%u", pidfile, (unsigned int)uid, (unsigned int)gid);
+ netdata_log_error("Cannot chown '%s' to %u:%u", pidfile, (unsigned int)uid, (unsigned int)gid);
}
int ngroups = (int)sysconf(_SC_NGROUPS_MAX);
@@ -108,7 +140,7 @@ int become_user(const char *username, int pid_fd) {
if(getgrouplist(username, gid, supplementary_groups, &ngroups) == -1) {
#endif /* __APPLE__ */
if(am_i_root)
- error("Cannot get supplementary groups of user '%s'.", username);
+ netdata_log_error("Cannot get supplementary groups of user '%s'.", username);
ngroups = 0;
}
@@ -122,7 +154,7 @@ int become_user(const char *username, int pid_fd) {
if(supplementary_groups && ngroups > 0) {
if(setgroups((size_t)ngroups, supplementary_groups) == -1) {
if(am_i_root)
- error("Cannot set supplementary groups for user '%s'", username);
+ netdata_log_error("Cannot set supplementary groups for user '%s'", username);
}
ngroups = 0;
}
@@ -135,7 +167,7 @@ int become_user(const char *username, int pid_fd) {
#else
if(setresgid(gid, gid, gid) != 0) {
#endif /* __APPLE__ */
- error("Cannot switch to user's %s group (gid: %u).", username, gid);
+ netdata_log_error("Cannot switch to user's %s group (gid: %u).", username, gid);
return -1;
}
@@ -144,24 +176,24 @@ int become_user(const char *username, int pid_fd) {
#else
if(setresuid(uid, uid, uid) != 0) {
#endif /* __APPLE__ */
- error("Cannot switch to user %s (uid: %u).", username, uid);
+ netdata_log_error("Cannot switch to user %s (uid: %u).", username, uid);
return -1;
}
if(setgid(gid) != 0) {
- error("Cannot switch to user's %s group (gid: %u).", username, gid);
+ netdata_log_error("Cannot switch to user's %s group (gid: %u).", username, gid);
return -1;
}
if(setegid(gid) != 0) {
- error("Cannot effectively switch to user's %s group (gid: %u).", username, gid);
+ netdata_log_error("Cannot effectively switch to user's %s group (gid: %u).", username, gid);
return -1;
}
if(setuid(uid) != 0) {
- error("Cannot switch to user %s (uid: %u).", username, uid);
+ netdata_log_error("Cannot switch to user %s (uid: %u).", username, uid);
return -1;
}
if(seteuid(uid) != 0) {
- error("Cannot effectively switch to user %s (uid: %u).", username, uid);
+ netdata_log_error("Cannot effectively switch to user %s (uid: %u).", username, uid);
return -1;
}
@@ -181,7 +213,7 @@ static void oom_score_adj(void) {
// read the existing score
if(read_single_signed_number_file("/proc/self/oom_score_adj", &old_score)) {
- error("Out-Of-Memory (OOM) score setting is not supported on this system.");
+ netdata_log_error("Out-Of-Memory (OOM) score setting is not supported on this system.");
return;
}
@@ -202,26 +234,26 @@ static void oom_score_adj(void) {
if(s && *s && (isdigit(*s) || *s == '-' || *s == '+'))
wanted_score = atoll(s);
else if(s && !strcmp(s, "keep")) {
- info("Out-Of-Memory (OOM) kept as-is (running with %d)", (int) old_score);
+ netdata_log_info("Out-Of-Memory (OOM) kept as-is (running with %d)", (int) old_score);
return;
}
else {
- info("Out-Of-Memory (OOM) score not changed due to non-numeric setting: '%s' (running with %d)", s, (int)old_score);
+ netdata_log_info("Out-Of-Memory (OOM) score not changed due to non-numeric setting: '%s' (running with %d)", s, (int)old_score);
return;
}
if(wanted_score < OOM_SCORE_ADJ_MIN) {
- error("Wanted Out-Of-Memory (OOM) score %d is too small. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MIN);
+ netdata_log_error("Wanted Out-Of-Memory (OOM) score %d is too small. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MIN);
wanted_score = OOM_SCORE_ADJ_MIN;
}
if(wanted_score > OOM_SCORE_ADJ_MAX) {
- error("Wanted Out-Of-Memory (OOM) score %d is too big. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MAX);
+ netdata_log_error("Wanted Out-Of-Memory (OOM) score %d is too big. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MAX);
wanted_score = OOM_SCORE_ADJ_MAX;
}
if(old_score == wanted_score) {
- info("Out-Of-Memory (OOM) score is already set to the wanted value %d", (int)old_score);
+ netdata_log_info("Out-Of-Memory (OOM) score is already set to the wanted value %d", (int)old_score);
return;
}
@@ -235,25 +267,27 @@ static void oom_score_adj(void) {
if(written) {
if(read_single_signed_number_file("/proc/self/oom_score_adj", &final_score))
- error("Adjusted my Out-Of-Memory (OOM) score to %d, but cannot verify it.", (int)wanted_score);
+ netdata_log_error("Adjusted my Out-Of-Memory (OOM) score to %d, but cannot verify it.", (int)wanted_score);
else if(final_score == wanted_score)
- info("Adjusted my Out-Of-Memory (OOM) score from %d to %d.", (int)old_score, (int)final_score);
+ netdata_log_info("Adjusted my Out-Of-Memory (OOM) score from %d to %d.", (int)old_score, (int)final_score);
else
- error("Adjusted my Out-Of-Memory (OOM) score from %d to %d, but it has been set to %d.", (int)old_score, (int)wanted_score, (int)final_score);
+ netdata_log_error("Adjusted my Out-Of-Memory (OOM) score from %d to %d, but it has been set to %d.", (int)old_score, (int)wanted_score, (int)final_score);
analytics_report_oom_score(final_score);
}
else
- error("Failed to adjust my Out-Of-Memory (OOM) score to %d. Running with %d. (systemd systems may change it via netdata.service)", (int)wanted_score, (int)old_score);
+ netdata_log_error("Failed to adjust my Out-Of-Memory (OOM) score to %d. Running with %d. (systemd systems may change it via netdata.service)", (int)wanted_score, (int)old_score);
}
else
- error("Failed to adjust my Out-Of-Memory (OOM) score. Cannot open /proc/self/oom_score_adj for writing.");
+ netdata_log_error("Failed to adjust my Out-Of-Memory (OOM) score. Cannot open /proc/self/oom_score_adj for writing.");
}
static void process_nice_level(void) {
#ifdef HAVE_NICE
int nice_level = (int)config_get_number(CONFIG_SECTION_GLOBAL, "process nice level", 19);
- if(nice(nice_level) == -1) error("Cannot set netdata CPU nice level to %d.", nice_level);
- else debug(D_SYSTEM, "Set netdata nice level to %d.", nice_level);
+ if(nice(nice_level) == -1)
+ netdata_log_error("Cannot set netdata CPU nice level to %d.", nice_level);
+ else
+ netdata_log_debug(D_SYSTEM, "Set netdata nice level to %d.", nice_level);
#endif // HAVE_NICE
};
@@ -309,7 +343,7 @@ struct sched_def {
static void sched_getscheduler_report(void) {
int sched = sched_getscheduler(0);
if(sched == -1) {
- error("Cannot get my current process scheduling policy.");
+ netdata_log_error("Cannot get my current process scheduling policy.");
return;
}
else {
@@ -319,23 +353,23 @@ static void sched_getscheduler_report(void) {
if(scheduler_defaults[i].flags & SCHED_FLAG_PRIORITY_CONFIGURABLE) {
struct sched_param param;
if(sched_getparam(0, &param) == -1) {
- error("Cannot get the process scheduling priority for my policy '%s'", scheduler_defaults[i].name);
+ netdata_log_error("Cannot get the process scheduling priority for my policy '%s'", scheduler_defaults[i].name);
return;
}
else {
- info("Running with process scheduling policy '%s', priority %d", scheduler_defaults[i].name, param.sched_priority);
+ netdata_log_info("Running with process scheduling policy '%s', priority %d", scheduler_defaults[i].name, param.sched_priority);
}
}
else if(scheduler_defaults[i].flags & SCHED_FLAG_USE_NICE) {
#ifdef HAVE_GETPRIORITY
int n = getpriority(PRIO_PROCESS, 0);
- info("Running with process scheduling policy '%s', nice level %d", scheduler_defaults[i].name, n);
+ netdata_log_info("Running with process scheduling policy '%s', nice level %d", scheduler_defaults[i].name, n);
#else // !HAVE_GETPRIORITY
- info("Running with process scheduling policy '%s'", scheduler_defaults[i].name);
+ netdata_log_info("Running with process scheduling policy '%s'", scheduler_defaults[i].name);
#endif // !HAVE_GETPRIORITY
}
else {
- info("Running with process scheduling policy '%s'", scheduler_defaults[i].name);
+ netdata_log_info("Running with process scheduling policy '%s'", scheduler_defaults[i].name);
}
return;
@@ -374,14 +408,14 @@ static void sched_setscheduler_set(void) {
#ifdef HAVE_SCHED_GET_PRIORITY_MIN
errno = 0;
if(priority < sched_get_priority_min(policy)) {
- error("scheduler %s (%d) priority %d is below the minimum %d. Using the minimum.", name, policy, priority, sched_get_priority_min(policy));
+ netdata_log_error("scheduler %s (%d) priority %d is below the minimum %d. Using the minimum.", name, policy, priority, sched_get_priority_min(policy));
priority = sched_get_priority_min(policy);
}
#endif
#ifdef HAVE_SCHED_GET_PRIORITY_MAX
errno = 0;
if(priority > sched_get_priority_max(policy)) {
- error("scheduler %s (%d) priority %d is above the maximum %d. Using the maximum.", name, policy, priority, sched_get_priority_max(policy));
+ netdata_log_error("scheduler %s (%d) priority %d is above the maximum %d. Using the maximum.", name, policy, priority, sched_get_priority_max(policy));
priority = sched_get_priority_max(policy);
}
#endif
@@ -390,7 +424,7 @@ static void sched_setscheduler_set(void) {
}
if(!found) {
- error("Unknown scheduling policy '%s' - falling back to nice", name);
+ netdata_log_error("Unknown scheduling policy '%s' - falling back to nice", name);
goto fallback;
}
@@ -401,10 +435,13 @@ static void sched_setscheduler_set(void) {
errno = 0;
i = sched_setscheduler(0, policy, &param);
if(i != 0) {
- error("Cannot adjust netdata scheduling policy to %s (%d), with priority %d. Falling back to nice.", name, policy, priority);
+ netdata_log_error("Cannot adjust netdata scheduling policy to %s (%d), with priority %d. Falling back to nice.",
+ name,
+ policy,
+ priority);
}
else {
- info("Adjusted netdata scheduling policy to %s (%d), with priority %d.", name, policy, priority);
+ netdata_log_info("Adjusted netdata scheduling policy to %s (%d), with priority %d.", name, policy, priority);
if(!(flags & SCHED_FLAG_USE_NICE))
goto report;
}
@@ -457,15 +494,16 @@ int become_daemon(int dont_fork, const char *user)
pidfd = open(pidfile, O_WRONLY | O_CREAT, 0644);
if(pidfd >= 0) {
if(ftruncate(pidfd, 0) != 0)
- error("Cannot truncate pidfile '%s'.", pidfile);
+ netdata_log_error("Cannot truncate pidfile '%s'.", pidfile);
char b[100];
sprintf(b, "%d\n", getpid());
ssize_t i = write(pidfd, b, strlen(b));
if(i <= 0)
- error("Cannot write pidfile '%s'.", pidfile);
+ netdata_log_error("Cannot write pidfile '%s'.", pidfile);
}
- else error("Failed to open pidfile '%s'.", pidfile);
+ else
+ netdata_log_error("Failed to open pidfile '%s'.", pidfile);
}
// Set new file permissions
@@ -482,17 +520,13 @@ int become_daemon(int dont_fork, const char *user)
if(user && *user) {
if(become_user(user, pidfd) != 0) {
- error("Cannot become user '%s'. Continuing as we are.", user);
+ netdata_log_error("Cannot become user '%s'. Continuing as we are.", user);
}
- else debug(D_SYSTEM, "Successfully became user '%s'.", user);
+ else
+ netdata_log_debug(D_SYSTEM, "Successfully became user '%s'.", user);
}
else {
- create_needed_dir(netdata_configured_cache_dir, getuid(), getgid());
- create_needed_dir(netdata_configured_varlib_dir, getuid(), getgid());
- create_needed_dir(netdata_configured_lock_dir, getuid(), getgid());
- create_needed_dir(claimingdirectory, getuid(), getgid());
-
- clean_directory(netdata_configured_lock_dir);
+ prepare_required_directories(getuid(), getgid());
}
if(pidfd != -1)
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-21 07:42:37 +0000