hush/libbb/libc5.c
2002-08-15 03:29:56 +00:00

185 lines
5.6 KiB
C

/* vi: set sw=4 ts=4: */
#include <features.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <paths.h>
#include <unistd.h>
#if ! defined __dietlibc__ && __GNU_LIBRARY__ < 5
/*
* Some systems already have updwtmp(). Some don't... This is
* the updwtmp() implementation from uClibc, Copyright 2002 by
* Erik Andersen <andersee@debian.org>
*/
extern void updwtmp(const char *wtmp_file, const struct utmp *lutmp)
{
int fd;
fd = open(wtmp_file, O_APPEND | O_WRONLY, 0);
if (fd >= 0) {
if (lockf(fd, F_LOCK, 0)==0) {
write(fd, (const char *) lutmp, sizeof(struct utmp));
lockf(fd, F_ULOCK, 0);
close(fd);
}
}
}
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* Modified by Manuel Novoa III Mar 1, 2001
*
* Converted original strtok.c code of strtok to __strtok_r.
* Cleaned up logic and reduced code size.
*/
char *strtok_r(char *s, const char *delim, char **save_ptr)
{
char *token;
token = 0; /* Initialize to no token. */
if (s == 0) { /* If not first time called... */
s = *save_ptr; /* restart from where we left off. */
}
if (s != 0) { /* If not finished... */
*save_ptr = 0;
s += strspn(s, delim); /* Skip past any leading delimiters. */
if (*s != '\0') { /* We have a token. */
token = s;
*save_ptr = strpbrk(token, delim); /* Find token's end. */
if (*save_ptr != 0) {
/* Terminate the token and make SAVE_PTR point past it. */
*(*save_ptr)++ = '\0';
}
}
}
return token;
}
/* Basically getdelim() with the delimiter hard wired to '\n' */
ssize_t getline(char **linebuf, size_t *n, FILE *file)
{
return (getdelim (linebuf, n, '\n', file));
}
/*
* daemon implementation for uClibc
*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Modified for uClibc by Erik Andersen <andersee@debian.org>
*
* The uClibc Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the GNU C Library; see the file COPYING.LIB. If not,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Original copyright notice is retained at the end of this file.
*/
int daemon( int nochdir, int noclose )
{
int fd;
switch (fork()) {
case -1:
return(-1);
case 0:
break;
default:
_exit(0);
}
if (setsid() == -1)
return(-1);
if (!nochdir)
chdir("/");
if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
if (fd > 2)
close(fd);
}
return(0);
}
/*-
* Copyright (c) 1990, 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. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 4. 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.
*/
#endif