diff options
Diffstat (limited to 'libmisc/pwd_init.c')
| -rw-r--r-- | libmisc/pwd_init.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libmisc/pwd_init.c b/libmisc/pwd_init.c new file mode 100644 index 0000000..774ba9b --- /dev/null +++ b/libmisc/pwd_init.c @@ -0,0 +1,102 @@ +/* + * Copyright (c) 1990 - 1994, Julianne Frances Haugh + * Copyright (c) 1997 , Marek Michałkiewicz + * Copyright (c) 2003 - 2005, Tomasz Kłoczko + * Copyright (c) 2008 , Nicolas François + * 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. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * HOLDERS 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 <config.h> + +#ident "$Id$" + +#include "defines.h" +#include <signal.h> +#include <sys/types.h> +#include <sys/stat.h> +#ifdef HAVE_SYS_RESOURCE_H +#include <sys/resource.h> +#endif + +#include "prototypes.h" + +/* + * pwd_init - ignore signals, and set resource limits to safe + * values. Call this before modifying password files, so that + * it is less likely to fail in the middle of operation. + */ +void pwd_init (void) +{ +#ifdef HAVE_SYS_RESOURCE_H + struct rlimit rlim; + +#ifdef RLIMIT_CORE + rlim.rlim_cur = rlim.rlim_max = 0; + setrlimit (RLIMIT_CORE, &rlim); +#endif + rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY; +#ifdef RLIMIT_AS + setrlimit (RLIMIT_AS, &rlim); +#endif +#ifdef RLIMIT_CPU + setrlimit (RLIMIT_CPU, &rlim); +#endif +#ifdef RLIMIT_DATA + setrlimit (RLIMIT_DATA, &rlim); +#endif +#ifdef RLIMIT_FSIZE + setrlimit (RLIMIT_FSIZE, &rlim); +#endif +#ifdef RLIMIT_NOFILE + setrlimit (RLIMIT_NOFILE, &rlim); +#endif +#ifdef RLIMIT_RSS + setrlimit (RLIMIT_RSS, &rlim); +#endif +#ifdef RLIMIT_STACK + setrlimit (RLIMIT_STACK, &rlim); +#endif +#else /* !HAVE_SYS_RESOURCE_H */ + set_filesize_limit (30000); + /* don't know how to set the other limits... */ +#endif /* !HAVE_SYS_RESOURCE_H */ + + signal (SIGALRM, SIG_IGN); + signal (SIGHUP, SIG_IGN); + signal (SIGINT, SIG_IGN); + signal (SIGPIPE, SIG_IGN); + signal (SIGQUIT, SIG_IGN); + signal (SIGTERM, SIG_IGN); +#ifdef SIGTSTP + signal (SIGTSTP, SIG_IGN); +#endif +#ifdef SIGTTOU + signal (SIGTTOU, SIG_IGN); +#endif + + umask (077); +} |