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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _PROCESS_H_
#define _PROCESS_H_
#include <errno.h> /* errno */
#include <limits.h> /* PATH_MAX */
#include <libgen.h> /* basename et al */
#include <stdlib.h> /* NULL */
#include <string.h> /* strerror */
#include <unistd.h> /* readlink */
#include <dirent.h>
#include <sys/wait.h>
#include <rte_string_fns.h> /* strlcpy */
#ifdef RTE_EXEC_ENV_FREEBSD
#define self "curproc"
#define exe "file"
#else
#define self "self"
#define exe "exe"
#endif
#ifdef RTE_LIBRTE_PDUMP
#ifdef RTE_LIBRTE_RING_PMD
#include <pthread.h>
extern void *send_pkts(void *empty);
extern uint16_t flag_for_send_pkts;
#endif
#endif
/*
* launches a second copy of the test process using the given argv parameters,
* which should include argv[0] as the process name. To identify in the
* subprocess the source of the call, the env_value parameter is set in the
* environment as $RTE_TEST
*/
static inline int
process_dup(const char *const argv[], int numargs, const char *env_value)
{
int num;
char *argv_cpy[numargs + 1];
int i, status;
char path[32];
#ifdef RTE_LIBRTE_PDUMP
#ifdef RTE_LIBRTE_RING_PMD
pthread_t thread;
#endif
#endif
pid_t pid = fork();
if (pid < 0)
return -1;
else if (pid == 0) {
/* make a copy of the arguments to be passed to exec */
for (i = 0; i < numargs; i++)
argv_cpy[i] = strdup(argv[i]);
argv_cpy[i] = NULL;
num = numargs;
#ifdef RTE_EXEC_ENV_LINUX
{
const char *procdir = "/proc/" self "/fd/";
struct dirent *dirent;
char *endptr;
int fd, fdir;
DIR *dir;
/* close all open file descriptors, check /proc/self/fd
* to only call close on open fds. Exclude fds 0, 1 and
* 2
*/
dir = opendir(procdir);
if (dir == NULL) {
rte_panic("Error opening %s: %s\n", procdir,
strerror(errno));
}
fdir = dirfd(dir);
if (fdir < 0) {
status = errno;
closedir(dir);
rte_panic("Error %d obtaining fd for dir %s: %s\n",
fdir, procdir,
strerror(status));
}
while ((dirent = readdir(dir)) != NULL) {
errno = 0;
fd = strtol(dirent->d_name, &endptr, 10);
if (errno != 0 || endptr[0] != '\0') {
printf("Error converting name fd %d %s:\n",
fd, dirent->d_name);
continue;
}
if (fd == fdir || fd <= 2)
continue;
close(fd);
}
closedir(dir);
}
#endif
printf("Running binary with argv[]:");
for (i = 0; i < num; i++)
printf("'%s' ", argv_cpy[i]);
printf("\n");
/* set the environment variable */
if (setenv(RECURSIVE_ENV_VAR, env_value, 1) != 0)
rte_panic("Cannot export environment variable\n");
strlcpy(path, "/proc/" self "/" exe, sizeof(path));
if (execv(path, argv_cpy) < 0) {
if (errno == ENOENT) {
printf("Could not find '%s', is procfs mounted?\n",
path);
}
rte_panic("Cannot exec: %s\n", strerror(errno));
}
}
/* parent process does a wait */
#ifdef RTE_LIBRTE_PDUMP
#ifdef RTE_LIBRTE_RING_PMD
if ((strcmp(env_value, "run_pdump_server_tests") == 0))
pthread_create(&thread, NULL, &send_pkts, NULL);
#endif
#endif
while (wait(&status) != pid)
;
#ifdef RTE_LIBRTE_PDUMP
#ifdef RTE_LIBRTE_RING_PMD
if ((strcmp(env_value, "run_pdump_server_tests") == 0)) {
flag_for_send_pkts = 0;
pthread_join(thread, NULL);
}
#endif
#endif
return status;
}
/* FreeBSD doesn't support file prefixes, so force compile failures for any
* tests attempting to use this function on FreeBSD.
*/
#ifdef RTE_EXEC_ENV_LINUX
static char *
get_current_prefix(char *prefix, int size)
{
char path[PATH_MAX] = {0};
char buf[PATH_MAX] = {0};
/* get file for config (fd is always 3) */
snprintf(path, sizeof(path), "/proc/self/fd/%d", 3);
/* return NULL on error */
if (readlink(path, buf, sizeof(buf)) == -1)
return NULL;
/* get the prefix */
snprintf(prefix, size, "%s", basename(dirname(buf)));
return prefix;
}
#endif
#endif /* _PROCESS_H_ */
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