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/* $OpenBSD: misc.c,v 1.4 2001/02/28 17:52:54 deraadt 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 1.4 2001/02/28 17:52:54 deraadt Exp $");
#include "misc.h"
#include "log.h"
#include "xmalloc.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);
}
struct passwd *
pwcopy(struct passwd *pw)
{
struct passwd *copy = xmalloc(sizeof(*copy));
memset(copy, 0, sizeof(*copy));
copy->pw_name = xstrdup(pw->pw_name);
copy->pw_passwd = xstrdup(pw->pw_passwd);
copy->pw_gecos = xstrdup(pw->pw_gecos);
copy->pw_uid = pw->pw_uid;
copy->pw_gid = pw->pw_gid;
#ifdef HAVE_PW_CLASS_IN_PASSWD
copy->pw_class = xstrdup(pw->pw_class);
#endif
copy->pw_dir = xstrdup(pw->pw_dir);
copy->pw_shell = xstrdup(pw->pw_shell);
return copy;
}
mysig_t
mysignal(int sig, mysig_t act)
{
#ifdef HAVE_SIGACTION
struct sigaction sa, osa;
if (sigaction(sig, NULL, &osa) == -1)
return (mysig_t) -1;
if (osa.sa_handler != act) {
memset(&sa, 0, sizeof(sa));
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
#if defined(SA_RESTART)
if (sig == SIGCHLD)
sa.sa_flags |= SA_RESTART;
#endif
#if defined(SA_INTERRUPT)
if (sig == SIGALRM)
sa.sa_flags |= SA_INTERRUPT;
#endif
sa.sa_handler = act;
if (sigaction(sig, &sa, NULL) == -1)
return (mysig_t) -1;
}
return (osa.sa_handler);
#else
return (signal(sig, act));
#endif
}
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