[openssh.git] / misc.c

/*     $OpenBSD: misc.c,v 1.1 2001/01/21 19:05:52 markus Exp $ */

/*
 * Copyright (c) 2000 Markus Friedl.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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"
RCSID("$OpenBSD: misc.c,v 1.1 2001/01/21 19:05:52 markus Exp $");

#include "misc.h"
#include "ssh.h"
#include "log.h"

char *
chop(char *s)
{
	char *t = s;
	while (*t) {
		if(*t == '\n' || *t == '\r') {
			*t = '\0';
			return s;
		}
		t++;
	}
	return s;

}

void
set_nonblock(int fd)
{
	int val;
	val = fcntl(fd, F_GETFL, 0);
	if (val < 0) {
		error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
		return;
	}
	if (val & O_NONBLOCK) {
		debug("fd %d IS O_NONBLOCK", fd);
		return;
	}
	debug("fd %d setting O_NONBLOCK", fd);
	val |= O_NONBLOCK;
	if (fcntl(fd, F_SETFL, val) == -1)
		if (errno != ENODEV)
			error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
			    fd, strerror(errno));
}

/* Characters considered whitespace in strsep calls. */
#define WHITESPACE " \t\r\n"

char *
strdelim(char **s)
{
	char *old;
	int wspace = 0;

	if (*s == NULL)
		return NULL;

	old = *s;

	*s = strpbrk(*s, WHITESPACE "=");
	if (*s == NULL)
		return (old);

	/* Allow only one '=' to be skipped */
	if (*s[0] == '=')
		wspace = 1;
	*s[0] = '\0';

	*s += strspn(*s + 1, WHITESPACE) + 1;
	if (*s[0] == '=' && !wspace)
		*s += strspn(*s + 1, WHITESPACE) + 1;

	return (old);
}

mysig_t
mysignal(int sig, mysig_t act)
{
#ifdef HAVE_SIGACTION
	struct sigaction sa, osa;

	if (sigaction(sig, 0, &osa) == -1)
		return (mysig_t) -1;
	if (osa.sa_handler != act) {
		memset(&sa, 0, sizeof sa);
		sigemptyset(&sa.sa_mask);
		sa.sa_flags = 0;
		sa.sa_handler = act;
		if (sigaction(sig, &sa, 0) == -1)
			return (mysig_t) -1;
	}
	return (osa.sa_handler);
#else
	return (signal(sig, act));
#endif
}
Commit	Line	Data
54322434	1	/* $OpenBSD: misc.c,v 1.1 2001/01/21 19:05:52 markus Exp $ */
bcbf86ec	2
	3	/*
	4	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	16	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	17	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	18	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	19	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	20	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	21	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	22	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	23	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	24	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	25	*/
	26
6d24277f	27	#include "includes.h"
b35eb612	28	RCSID("$OpenBSD: misc.c,v 1.1 2001/01/21 19:05:52 markus Exp $");
6d24277f	29
1aa00dcb	30	#include "misc.h"
6d24277f	31	#include "ssh.h"
42f11eb2	32	#include "log.h"
6d24277f	33
	34	char *
	35	chop(char *s)
	36	{
	37	char *t = s;
	38	while (*t) {
	39	if(t == '\n' \|\| t == '\r') {
	40	*t = '\0';
	41	return s;
	42	}
	43	t++;
	44	}
	45	return s;
	46
	47	}
	48
	49	void
	50	set_nonblock(int fd)
	51	{
	52	int val;
6d24277f	53	val = fcntl(fd, F_GETFL, 0);
	54	if (val < 0) {
	55	error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
	56	return;
	57	}
a22aff1f	58	if (val & O_NONBLOCK) {
a22aff1f	59	debug("fd %d IS O_NONBLOCK", fd);
6d24277f	60	return;
a22aff1f	61	}
6d24277f	62	debug("fd %d setting O_NONBLOCK", fd);
	63	val \|= O_NONBLOCK;
	64	if (fcntl(fd, F_SETFL, val) == -1)
14a9a859	65	if (errno != ENODEV)
	66	error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
	67	fd, strerror(errno));
6d24277f	68	}
	69
	70	/* Characters considered whitespace in strsep calls. */
	71	#define WHITESPACE " \t\r\n"
	72
	73	char *
	74	strdelim(char **s)
	75	{
	76	char *old;
	77	int wspace = 0;
	78
	79	if (*s == NULL)
	80	return NULL;
	81
	82	old = *s;
	83
	84	s = strpbrk(s, WHITESPACE "=");
	85	if (*s == NULL)
	86	return (old);
	87
	88	/* Allow only one '=' to be skipped */
	89	if (*s[0] == '=')
	90	wspace = 1;
	91	*s[0] = '\0';
	92
	93	s += strspn(s + 1, WHITESPACE) + 1;
	94	if (*s[0] == '=' && !wspace)
	95	s += strspn(s + 1, WHITESPACE) + 1;
	96
	97	return (old);
	98	}
1aa00dcb	99
	100	mysig_t
	101	mysignal(int sig, mysig_t act)
	102	{
	103	#ifdef HAVE_SIGACTION
	104	struct sigaction sa, osa;
	105
	106	if (sigaction(sig, 0, &osa) == -1)
	107	return (mysig_t) -1;
	108	if (osa.sa_handler != act) {
	109	memset(&sa, 0, sizeof sa);
	110	sigemptyset(&sa.sa_mask);
	111	sa.sa_flags = 0;
	112	sa.sa_handler = act;
	113	if (sigaction(sig, &sa, 0) == -1)
	114	return (mysig_t) -1;
	115	}
	116	return (osa.sa_handler);
	117	#else
	118	return (signal(sig, act));
	119	#endif
	120	}