[gssapi-openssh.git] / openssh / openbsd-compat / setproctitle.c

/* Based on conf.c from UCB sendmail 8.8.8 */

/*
 * Copyright 2003 Damien Miller
 * Copyright (c) 1983, 1995-1997 Eric P. Allman
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "includes.h"

#ifndef HAVE_SETPROCTITLE

#include <unistd.h>
#ifdef HAVE_SYS_PSTAT_H
#include <sys/pstat.h>
#endif

#define SPT_NONE	0	/* don't use it at all */
#define SPT_PSTAT	1	/* use pstat(PSTAT_SETCMD, ...) */
#define SPT_REUSEARGV	2	/* cover argv with title information */

#ifndef SPT_TYPE
# define SPT_TYPE	SPT_NONE
#endif

#ifndef SPT_PADCHAR
# define SPT_PADCHAR	'\0'
#endif

#if SPT_TYPE == SPT_REUSEARGV
static char *argv_start = NULL;
static size_t argv_env_len = 0;
#endif

#endif /* HAVE_SETPROCTITLE */

void
compat_init_setproctitle(int argc, char *argv[])
{
#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
	extern char **environ;
	char *lastargv = NULL;
	char **envp = environ;
	int i;

	/*
	 * NB: This assumes that argv has already been copied out of the
	 * way. This is true for sshd, but may not be true for other 
	 * programs. Beware.
	 */

	if (argc == 0 || argv[0] == NULL)
		return;

	/* Fail if we can't allocate room for the new environment */
	for (i = 0; envp[i] != NULL; i++)
		;
	if ((environ = malloc(sizeof(*environ) * (i + 1))) == NULL) {
		environ = envp;	/* put it back */
		return;
	}

	/*
	 * Find the last argv string or environment variable within 
	 * our process memory area.
	 */
	for (i = 0; i < argc; i++) {
		if (lastargv == NULL || lastargv + 1 == argv[i])
			lastargv = argv[i] + strlen(argv[i]);
	}
	for (i = 0; envp[i] != NULL; i++) {
		if (lastargv + 1 == envp[i])
			lastargv = envp[i] + strlen(envp[i]);
	}

	argv[1] = NULL;
	argv_start = argv[0];
	argv_env_len = lastargv - argv[0] - 1;

	/* 
	 * Copy environment 
	 * XXX - will truncate env on strdup fail
	 */
	for (i = 0; envp[i] != NULL; i++)
		environ[i] = strdup(envp[i]);
	environ[i] = NULL;
#endif /* SPT_REUSEARGV */
}

#ifndef HAVE_SETPROCTITLE
void
setproctitle(const char *fmt, ...)
{
#if SPT_TYPE != SPT_NONE
	va_list ap;
	char buf[1024];
	size_t len;
	extern char *__progname;
#if SPT_TYPE == SPT_PSTAT
	union pstun pst;
#endif

#if SPT_TYPE == SPT_REUSEARGV
	if (argv_env_len <= 0)
		return;
#endif

	strlcpy(buf, __progname, sizeof(buf));

	va_start(ap, fmt);
	if (fmt != NULL) {
		len = strlcat(buf, ": ", sizeof(buf));
		if (len < sizeof(buf))
			vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
	}
	va_end(ap);

#if SPT_TYPE == SPT_PSTAT
	pst.pst_command = buf;
	pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0);
#elif SPT_TYPE == SPT_REUSEARGV
/*	debug("setproctitle: copy \"%s\" into len %d", 
	    buf, argv_env_len); */
	len = strlcpy(argv_start, buf, argv_env_len);
	for(; len < argv_env_len; len++)
		argv_start[len] = SPT_PADCHAR;
#endif

#endif /* SPT_NONE */
}

#endif /* HAVE_SETPROCTITLE */
Commit	Line	Data
70791e56	1	/* Based on conf.c from UCB sendmail 8.8.8 */
3c0ef626	2
70791e56	3	/*
	4	* Copyright 2003 Damien Miller
	5	* Copyright (c) 1983, 1995-1997 Eric P. Allman
	6	* Copyright (c) 1988, 1993
	7	* The Regents of the University of California. All rights reserved.
3c0ef626	8	*
70791e56	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in the
	16	* documentation and/or other materials provided with the distribution.
	17	* 3. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
3c0ef626	20	*
70791e56	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
3c0ef626	32	*/
3c0ef626	33
3c0ef626	34	#include "includes.h"
	35
	36	#ifndef HAVE_SETPROCTITLE
	37
1c14df9e	38	#include <unistd.h>
1c14df9e	39	#ifdef HAVE_SYS_PSTAT_H
70791e56	40	#include <sys/pstat.h>
1c14df9e	41	#endif
1c14df9e	42
70791e56	43	#define SPT_NONE 0 /* don't use it at all */
416fd2a8	44	#define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */
416fd2a8	45	#define SPT_REUSEARGV 2 /* cover argv with title information */
1c14df9e	46
70791e56	47	#ifndef SPT_TYPE
70791e56	48	# define SPT_TYPE SPT_NONE
3c0ef626	49	#endif
3c0ef626	50
70791e56	51	#ifndef SPT_PADCHAR
70791e56	52	# define SPT_PADCHAR '\0'
1c14df9e	53	#endif
3c0ef626	54
70791e56	55	#if SPT_TYPE == SPT_REUSEARGV
	56	static char *argv_start = NULL;
	57	static size_t argv_env_len = 0;
1c14df9e	58	#endif
1c14df9e	59
70791e56	60	#endif /* HAVE_SETPROCTITLE */
3c0ef626	61
3c0ef626	62	void
70791e56	63	compat_init_setproctitle(int argc, char *argv[])
3c0ef626	64	{
70791e56	65	#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
	66	extern char **environ;
	67	char *lastargv = NULL;
	68	char **envp = environ;
	69	int i;
1c14df9e	70
1c14df9e	71	/*
70791e56	72	* NB: This assumes that argv has already been copied out of the
	73	* way. This is true for sshd, but may not be true for other
	74	* programs. Beware.
1c14df9e	75	*/
1c14df9e	76
70791e56	77	if (argc == 0 \|\| argv[0] == NULL)
	78	return;
	79
	80	/* Fail if we can't allocate room for the new environment */
	81	for (i = 0; envp[i] != NULL; i++)
	82	;
	83	if ((environ = malloc(sizeof(environ) (i + 1))) == NULL) {
	84	environ = envp; /* put it back */
	85	return;
	86	}
1c14df9e	87
1c14df9e	88	/*
70791e56	89	* Find the last argv string or environment variable within
70791e56	90	* our process memory area.
1c14df9e	91	*/
70791e56	92	for (i = 0; i < argc; i++) {
	93	if (lastargv == NULL \|\| lastargv + 1 == argv[i])
	94	lastargv = argv[i] + strlen(argv[i]);
	95	}
	96	for (i = 0; envp[i] != NULL; i++) {
	97	if (lastargv + 1 == envp[i])
	98	lastargv = envp[i] + strlen(envp[i]);
1c14df9e	99	}
1c14df9e	100
70791e56	101	argv[1] = NULL;
	102	argv_start = argv[0];
	103	argv_env_len = lastargv - argv[0] - 1;
1c14df9e	104
70791e56	105	/*
	106	* Copy environment
	107	* XXX - will truncate env on strdup fail
	108	*/
	109	for (i = 0; envp[i] != NULL; i++)
	110	environ[i] = strdup(envp[i]);
	111	environ[i] = NULL;
	112	#endif /* SPT_REUSEARGV */
3c0ef626	113	}
1c14df9e	114
70791e56	115	#ifndef HAVE_SETPROCTITLE
1c14df9e	116	void
70791e56	117	setproctitle(const char *fmt, ...)
1c14df9e	118	{
70791e56	119	#if SPT_TYPE != SPT_NONE
	120	va_list ap;
	121	char buf[1024];
	122	size_t len;
	123	extern char *__progname;
	124	#if SPT_TYPE == SPT_PSTAT
	125	union pstun pst;
1c14df9e	126	#endif
1c14df9e	127
70791e56	128	#if SPT_TYPE == SPT_REUSEARGV
70791e56	129	if (argv_env_len <= 0)
1c14df9e	130	return;
70791e56	131	#endif
1c14df9e	132
70791e56	133	strlcpy(buf, __progname, sizeof(buf));
	134
	135	va_start(ap, fmt);
	136	if (fmt != NULL) {
	137	len = strlcat(buf, ": ", sizeof(buf));
	138	if (len < sizeof(buf))
	139	vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
1c14df9e	140	}
70791e56	141	va_end(ap);
1c14df9e	142
70791e56	143	#if SPT_TYPE == SPT_PSTAT
	144	pst.pst_command = buf;
	145	pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0);
	146	#elif SPT_TYPE == SPT_REUSEARGV
	147	/* debug("setproctitle: copy \"%s\" into len %d",
	148	buf, argv_env_len); */
	149	len = strlcpy(argv_start, buf, argv_env_len);
	150	for(; len < argv_env_len; len++)
	151	argv_start[len] = SPT_PADCHAR;
	152	#endif
1c14df9e	153
70791e56	154	#endif /* SPT_NONE */
1c14df9e	155	}
1c14df9e	156
70791e56	157	#endif /* HAVE_SETPROCTITLE */