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/* $NetBSD: exec.c,v 1.5 2003/09/23 13:22:40 grant Exp $ */
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
#ifndef lint
#if 0
static const char *rcsid = "from FreeBSD Id: exec.c,v 1.6 1997/10/08 07:47:50 charnier Exp";
#else
__RCSID("$NetBSD: exec.c,v 1.5 2003/09/23 13:22:40 grant Exp $");
#endif
#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.
*
*/
#if HAVE_ERR_H
#include <err.h>
#endif
#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) {
warnx("vsystem can't alloc arg space");
return 1;
}
va_start(args, fmt);
if (vsnprintf(cmd, maxargs, fmt, args) >= maxargs) {
warnx("vsystem args are too long");
va_end(args);
free(cmd);
return 1;
}
#ifdef VSYSTEM_DEBUG
printf("vsystem(\"%s\")\n", cmd);
#endif
ret = system(cmd);
va_end(args);
free(cmd);
return ret;
}
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