diff options
Diffstat (limited to 'ntpsnmpd/netsnmp_daemonize.c')
| -rw-r--r-- | ntpsnmpd/netsnmp_daemonize.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/ntpsnmpd/netsnmp_daemonize.c b/ntpsnmpd/netsnmp_daemonize.c new file mode 100644 index 000000000000..43cba8922ca1 --- /dev/null +++ b/ntpsnmpd/netsnmp_daemonize.c @@ -0,0 +1,266 @@ +/* + * system.c + */ +/* Portions of this file are subject to the following copyright(s). See + * the Net-SNMP's COPYING file for more details and other copyrights + * that may apply: + */ +/*********************************************************** + Copyright 1992 by Carnegie Mellon University + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of CMU not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. +******************************************************************/ +/* + * Portions of this file are copyrighted by: + * Copyright © 2003 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms specified in the COPYING file + * distributed with the Net-SNMP package. + */ +/* + * System dependent routines go here + */ +#include <net-snmp/net-snmp-config.h> +#undef PACKAGE_BUGREPORT +#undef PACKAGE_NAME +#undef PACKAGE_STRING +#undef PACKAGE_TARNAME +#undef PACKAGE_VERSION +#include <config.h> + +#ifdef NEED_NETSNMP_DAEMONIZE + +#include <stdio.h> +#include <ctype.h> +#include <errno.h> + +#if HAVE_UNISTD_H +#include <unistd.h> +#endif +#if HAVE_STDLIB_H +#include <stdlib.h> +#endif + +#if TIME_WITH_SYS_TIME +# ifdef WIN32 +# include <sys/timeb.h> +# else +# include <sys/time.h> +# endif +# include <time.h> +#else +# if HAVE_SYS_TIME_H +# include <sys/time.h> +# else +# include <time.h> +# endif +#endif + +#include <sys/types.h> + +#if HAVE_NETINET_IN_H +#include <netinet/in.h> +#endif + +#if HAVE_WINSOCK_H +#include <winsock.h> +#endif +#if HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif +#if HAVE_NET_IF_H +#include <net/if.h> +#endif + +#if HAVE_SYS_SOCKIO_H +#include <sys/sockio.h> +#endif + +#if HAVE_SYS_IOCTL_H +#include <sys/ioctl.h> +#endif + +#ifdef HAVE_NLIST_H +#include <nlist.h> +#endif + +#if HAVE_SYS_FILE_H +#include <sys/file.h> +#endif + +#if HAVE_KSTAT_H +#include <kstat.h> +#endif + +#if HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif +#if HAVE_SYS_SYSCTL_H +#include <sys/sysctl.h> +#endif + +#if HAVE_STRING_H +#include <string.h> +#else +#include <strings.h> +#endif + +#if HAVE_DMALLOC_H +#include <dmalloc.h> +#endif + +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#if HAVE_FCNTL_H +#include <fcntl.h> +#endif + +#if defined(hpux10) || defined(hpux11) +#include <sys/pstat.h> +#endif + +#if HAVE_SYS_UTSNAME_H +#include <sys/utsname.h> +#endif + +#if HAVE_SYS_SYSTEMCFG_H +#include <sys/systemcfg.h> +#endif + +#if HAVE_SYS_SYSTEMINFO_H +#include <sys/systeminfo.h> +#endif + +#include <net-snmp/types.h> +#include <net-snmp/output_api.h> +#include <net-snmp/utilities.h> +#include <net-snmp/library/system.h> /* for "internal" definitions */ + +#include <net-snmp/library/snmp_api.h> +#include <net-snmp/library/read_config.h> /* for get_temp_file_pattern() */ + +#ifndef IFF_LOOPBACK +# define IFF_LOOPBACK 0 +#endif + +#ifdef INADDR_LOOPBACK +# define LOOPBACK INADDR_LOOPBACK +#else +# define LOOPBACK 0x7f000001 +#endif + +/** + * fork current process into the background. + * + * This function forks a process into the background, in order to + * become a daemon process. It does a few things along the way: + * + * - becoming a process/session group leader, and forking a second time so + * that process/session group leader can exit. + * + * - changing the working directory to / + * + * - closing stdin, stdout and stderr (unless stderr_log is set) and + * redirecting them to /dev/null + * + * @param quit_immediately : indicates if the parent process should + * exit after a successful fork. + * @param stderr_log : indicates if stderr is being used for + * logging and shouldn't be closed + * @returns -1 : fork error + * 0 : child process returning + * >0 : parent process returning. returned value is the child PID. + */ +int +netsnmp_daemonize(int quit_immediately, int stderr_log) +{ + int i = 0; + DEBUGMSGT(("daemonize","deamonizing...\n")); +#if HAVE_WORKING_FORK + /* + * Fork to return control to the invoking process and to + * guarantee that we aren't a process group leader. + */ + i = fork(); + if (i != 0) { + /* Parent. */ + DEBUGMSGT(("daemonize","first fork returned %d.\n", i)); + if(i == -1) { + snmp_log(LOG_ERR,"first fork failed (errno %d) in " + "netsnmp_daemonize()\n", errno); + return -1; + } + if (quit_immediately) { + DEBUGMSGT(("daemonize","parent exiting\n")); + exit(0); + } + } else { + /* Child. */ +#ifdef HAVE_SETSID + /* Become a process/session group leader. */ + setsid(); +#endif + /* + * Fork to let the process/session group leader exit. + */ + if ((i = fork()) != 0) { + DEBUGMSGT(("daemonize","second fork returned %d.\n", i)); + if(i == -1) { + snmp_log(LOG_ERR,"second fork failed (errno %d) in " + "netsnmp_daemonize()\n", errno); + } + /* Parent. */ + exit(0); + } +#ifndef WIN32 + else { + /* Child. */ + + DEBUGMSGT(("daemonize","child continuing\n")); + + /* Avoid keeping any directory in use. */ + chdir("/"); + + if (!stderr_log) { + /* + * Close inherited file descriptors to avoid + * keeping unnecessary references. + */ + close(0); + close(1); + close(2); + + /* + * Redirect std{in,out,err} to /dev/null, just in + * case. + */ + open("/dev/null", O_RDWR); + dup(0); + dup(0); + } + } +#endif /* !WIN32 */ + } +#endif /* HAVE_WORKING_FORK */ + return i; +} + +#else /* !NEED_NETSNMP_DAEMONIZE */ +int netsnp_daemonize_bs; +#endif |