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
|
/* $OpenBSD: exec.c,v 1.7 2003/07/04 17:31:19 avsm Exp $ */
#ifndef lint
static const char rcsid[] = "$OpenBSD: exec.c,v 1.7 2003/07/04 17:31:19 avsm Exp $";
#endif
/*
* FreeBSD install - a package for the installation and maintainance
* of non-core utilities.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Jordan K. Hubbard
* 18 July 1993
*
* Miscellaneous system routines.
*
*/
#include <err.h>
#include "lib.h"
/*
* Unusual system() substitute. Accepts format string and args,
* builds and executes command. Returns exit code.
*/
int
vsystem(const char *fmt, ...)
{
va_list args;
char *cmd;
size_t maxargs;
int ret;
maxargs = (size_t) sysconf(_SC_ARG_MAX);
maxargs -= 32; /* some slop for the sh -c */
if ((cmd = (char *) malloc(maxargs)) == (char *) NULL) {
pwarnx("vsystem can't alloc arg space");
return 1;
}
va_start(args, fmt);
if (vsnprintf(cmd, maxargs, fmt, args) > maxargs) {
pwarnx("vsystem args are too long");
return 1;
}
#ifdef DEBUG
printf("Executing %s\n", cmd);
#endif
ret = system(cmd);
va_end(args);
free(cmd);
return ret;
}
|
