shadow/libmisc/pwd_init.c

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#include <config.h>
#include "rcsid.h"
RCSID("$Id: pwd_init.c,v 1.1 1997/12/07 23:27:07 marekm Exp $")
#include "defines.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
/*
* 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);
}