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
65
66
67
68
69
70
|
/* Copyright (C) 2001 Red Hat, Inc.
Written by Jakub Jelinek <jakub@redhat.com>, 2001.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <config.h>
#include <errno.h>
#include <error.h>
#include <stdio.h>
#include <sys/wait.h>
#include <unistd.h>
static pid_t pid;
int
execve_close (FILE *f)
{
pid_t p;
int status;
if (f != NULL)
fclose (f);
while ((p = waitpid (pid, &status, 0)) == -1 && errno == EINTR);
if (p == -1 || ! WIFEXITED (status))
return -1;
return WEXITSTATUS (status);
}
FILE *
execve_open (const char *path, char *const argv[], char *const envp[])
{
int p[2];
FILE *f;
if (pipe (p) < 0)
{
error (0, errno, "Could not run %s", path);
return NULL;
}
switch (pid = vfork ())
{
case -1:
error (0, errno, "Could not run %s", path);
return NULL;
case 0:
close (p[0]);
if (p[1] != 1)
{
dup2 (p[1], 1);
close (p[1]);
}
dup2 (1, 2);
execve (path, argv, envp);
error (0, errno, "Could not run %s", path);
_exit (127);
}
close (p[1]);
f = fdopen (p[0], "r");
if (f == NULL)
{
close (p[0]);
execve_close (NULL);
}
return f;
}
|
