1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _PROCESS_H_
#define _PROCESS_H_
#ifdef RTE_EXEC_ENV_BSDAPP
#define self "curproc"
#define exe "file"
#else
#define self "self"
#define exe "exe"
#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, fd, status;
char path[32];
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;
/* close all open file descriptors, check /proc/self/fd to only
* call close on open fds. Exclude fds 0, 1 and 2*/
for (fd = getdtablesize(); fd > 2; fd-- ) {
snprintf(path, sizeof(path), "/proc/" exe "/fd/%d", fd);
if (access(path, F_OK) == 0)
close(fd);
}
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");
if (execv("/proc/" self "/" exe, argv_cpy) < 0)
rte_panic("Cannot exec\n");
}
/* parent process does a wait */
while (wait(&status) != pid)
;
return status;
}
#endif /* _PROCESS_H_ */
|
