148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
/* $OpenBSD: misc.c,v 1.4 2001/02/28 17:52:54 deraadt Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: misc.c,v 1.4 2001/02/28 17:52:54 deraadt Exp $");
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#include "misc.h"
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#include "log.h"
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#include "xmalloc.h"
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char *
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chop(char *s)
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{
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char *t = s;
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while (*t) {
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if(*t == '\n' || *t == '\r') {
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*t = '\0';
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return s;
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}
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t++;
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}
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return s;
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}
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void
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set_nonblock(int fd)
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{
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int val;
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val = fcntl(fd, F_GETFL, 0);
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if (val < 0) {
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error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
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return;
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}
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if (val & O_NONBLOCK) {
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debug("fd %d IS O_NONBLOCK", fd);
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return;
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}
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debug("fd %d setting O_NONBLOCK", fd);
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val |= O_NONBLOCK;
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if (fcntl(fd, F_SETFL, val) == -1)
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if (errno != ENODEV)
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error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
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fd, strerror(errno));
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}
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/* Characters considered whitespace in strsep calls. */
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#define WHITESPACE " \t\r\n"
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char *
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strdelim(char **s)
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{
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char *old;
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int wspace = 0;
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if (*s == NULL)
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return NULL;
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old = *s;
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*s = strpbrk(*s, WHITESPACE "=");
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if (*s == NULL)
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return (old);
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/* Allow only one '=' to be skipped */
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if (*s[0] == '=')
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wspace = 1;
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*s[0] = '\0';
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*s += strspn(*s + 1, WHITESPACE) + 1;
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if (*s[0] == '=' && !wspace)
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*s += strspn(*s + 1, WHITESPACE) + 1;
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return (old);
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}
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struct passwd *
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pwcopy(struct passwd *pw)
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{
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struct passwd *copy = xmalloc(sizeof(*copy));
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memset(copy, 0, sizeof(*copy));
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copy->pw_name = xstrdup(pw->pw_name);
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copy->pw_passwd = xstrdup(pw->pw_passwd);
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copy->pw_gecos = xstrdup(pw->pw_gecos);
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copy->pw_uid = pw->pw_uid;
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copy->pw_gid = pw->pw_gid;
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#ifdef HAVE_PW_CLASS_IN_PASSWD
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copy->pw_class = xstrdup(pw->pw_class);
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#endif
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copy->pw_dir = xstrdup(pw->pw_dir);
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copy->pw_shell = xstrdup(pw->pw_shell);
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return copy;
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}
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mysig_t
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mysignal(int sig, mysig_t act)
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{
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#ifdef HAVE_SIGACTION
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struct sigaction sa, osa;
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if (sigaction(sig, NULL, &osa) == -1)
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return (mysig_t) -1;
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if (osa.sa_handler != act) {
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memset(&sa, 0, sizeof(sa));
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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#if defined(SA_RESTART)
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if (sig == SIGCHLD)
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sa.sa_flags |= SA_RESTART;
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#endif
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#if defined(SA_INTERRUPT)
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if (sig == SIGALRM)
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sa.sa_flags |= SA_INTERRUPT;
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#endif
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sa.sa_handler = act;
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if (sigaction(sig, &sa, NULL) == -1)
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return (mysig_t) -1;
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}
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return (osa.sa_handler);
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#else
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return (signal(sig, act));
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#endif
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}
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