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/* $Id: osdep-freebsd.c,v 1.2 2009-01-20 22:17:53 nicm Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef __FreeBSD__
#include <sys/param.h>
#include <sys/sysctl.h>
#include <err.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *get_argv0(pid_t);
char *
get_argv0(pid_t pgrp)
{
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_ARGS, 0 };
size_t size;
char *args, *args2, *procname;
procname = NULL;
mib[3] = pgrp;
args = NULL;
size = 128;
while (size < SIZE_MAX / 2) {
size *= 2;
if ((args2 = realloc(args, size)) == NULL)
break;
args = args2;
if (sysctl(mib, 4, args, &size, NULL, 0) == -1) {
if (errno == ENOMEM)
continue;
break;
}
procname = strdup(args);
break;
}
free(args);
return (procname);
}
#endif
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