From acd09007a12e4901aa5d221af18de9c42044d970 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sun, 28 Oct 2018 13:41:35 +0100 Subject: Remove usyslogd/klogd and syslog utility program This is split out to a seperate package. Signed-off-by: David Oberhollenzer --- syslogd/syslogd.c | 273 ------------------------------------------------------ 1 file changed, 273 deletions(-) delete mode 100644 syslogd/syslogd.c (limited to 'syslogd/syslogd.c') diff --git a/syslogd/syslogd.c b/syslogd/syslogd.c deleted file mode 100644 index 3b88299..0000000 --- a/syslogd/syslogd.c +++ /dev/null @@ -1,273 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * Copyright (C) 2018 - David Oberhollenzer - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "syslogd.h" -#include "util.h" - -static const struct option long_opts[] = { - { "help", no_argument, NULL, 'h' }, - { "version", no_argument, NULL, 'V' }, - { "rotate-replace", no_argument, NULL, 'r' }, - { "chroot", no_argument, NULL, 'c' }, - { "max-size", required_argument, NULL, 'm' }, - { "user", required_argument, NULL, 'u' }, - { "group", required_argument, NULL, 'g' }, - { NULL, 0, NULL, 0 }, -}; - -static const char *short_opts = "hVcrm:u:g:"; - -const char *usage_string = -"Usage: usyslogd [OPTIONS..]\n\n" -"The following options are supported:\n" -" -h, --help Print this help text and exit\n" -" -V, --version Print version information and exit\n" -" -r, --rotate-replace Replace old log files when doing log rotation.\n" -" -m, --max-size Automatically rotate log files bigger than this.\n" -" -u, --user Run the syslog daemon as this user. If not set,\n" -" try to use the user '" DEFAULT_USER "'.\n" -" -g, --group Run the syslog daemon as this group. If not set,\n" -" try to use the group '" DEFAULT_GROUP "'.\n" -" -c, --chroot If set, do a chroot into the log file path.\n"; - - - -static volatile sig_atomic_t syslog_run = 1; -static volatile sig_atomic_t syslog_rotate = 0; -static int log_flags = 0; -static size_t max_size = 0; -static uid_t uid = 0; -static gid_t gid = 0; -static bool dochroot = false; - - - -static void sighandler(int signo) -{ - switch (signo) { - case SIGINT: - case SIGTERM: - syslog_run = 0; - break; - case SIGHUP: - syslog_rotate = 1; - break; - default: - break; - } -} - -static void signal_setup(void) -{ - struct sigaction act; - - memset(&act, 0, sizeof(act)); - act.sa_handler = sighandler; - - sigaction(SIGINT, &act, NULL); - sigaction(SIGTERM, &act, NULL); - sigaction(SIGHUP, &act, NULL); -} - -static int handle_data(int fd) -{ - char buffer[2048]; - syslog_msg_t msg; - ssize_t ret; - - memset(buffer, 0, sizeof(buffer)); - - ret = read(fd, buffer, sizeof(buffer)); - if (ret <= 0) - return -1; - - if (syslog_msg_parse(&msg, buffer)) - return -1; - - return logmgr->write(logmgr, &msg); -} - -static void process_options(int argc, char **argv) -{ - struct passwd *pw = getpwnam(DEFAULT_USER); - struct group *grp = getgrnam(DEFAULT_GROUP); - char *end; - int i; - - if (pw != NULL) - uid = pw->pw_uid; - - if (grp != NULL) - gid = grp->gr_gid; - - for (;;) { - i = getopt_long(argc, argv, short_opts, long_opts, NULL); - if (i == -1) - break; - - switch (i) { - case 'r': - log_flags |= LOG_ROTATE_OVERWRITE; - break; - case 'm': - log_flags |= LOG_ROTATE_SIZE_LIMIT; - max_size = strtol(optarg, &end, 10); - if (max_size == 0 || *end != '\0') { - fputs("Numeric argument > 0 expected for -m\n", - stderr); - goto fail; - } - break; - case 'u': - pw = getpwnam(optarg); - if (pw == NULL) { - fprintf(stderr, "Cannot get UID for user %s\n", - optarg); - goto fail; - } - uid = pw->pw_uid; - break; - case 'g': - grp = getgrnam(optarg); - if (grp == NULL) { - fprintf(stderr, - "Cannot get GID for group %s\n", - optarg); - goto fail; - } - gid = grp->gr_gid; - break; - case 'c': - dochroot = true; - break; - case 'h': - fputs(usage_string, stdout); - exit(EXIT_SUCCESS); - case 'V': - print_version("usyslogd"); - default: - goto fail; - } - } - return; -fail: - fputs("Try `usyslogd --help' for more information\n", stderr); - exit(EXIT_FAILURE); -} - -static int chroot_setup(void) -{ - if (mkdir(SYSLOG_PATH, 0750)) { - if (errno != EEXIST) { - perror("mkdir " SYSLOG_PATH); - return -1; - } - } - - if (uid > 0 && gid > 0 && chown(SYSLOG_PATH, uid, gid) != 0) { - perror("chown " SYSLOG_PATH); - return -1; - } - - if (chmod(SYSLOG_PATH, 0750)) { - perror("chmod " SYSLOG_PATH); - return -1; - } - - if (chdir(SYSLOG_PATH)) { - perror("cd " SYSLOG_PATH); - return -1; - } - - if (dochroot && chroot(SYSLOG_PATH) != 0) { - perror("chroot " SYSLOG_PATH); - return -1; - } - - return 0; -} - -static int user_setup(void) -{ - if (gid > 0 && setresgid(gid, gid, gid) != 0) { - perror("setgid"); - return -1; - } - if (uid > 0 && setresuid(uid, uid, uid) != 0) { - perror("setuid"); - return -1; - } - return 0; -} - -int main(int argc, char **argv) -{ - int sfd, status = EXIT_FAILURE; - - process_options(argc, argv); - - signal_setup(); - - sfd = mksock(SYSLOG_SOCKET, SOCK_FLAG_EVERYONE | SOCK_FLAG_DGRAM); - if (sfd < 0) - return EXIT_FAILURE; - - if (uid > 0 && gid > 0 && chown(SYSLOG_SOCKET, uid, gid) != 0) { - perror("chown " SYSLOG_SOCKET); - return -1; - } - - if (chroot_setup()) - return EXIT_FAILURE; - - if (user_setup()) - return EXIT_FAILURE; - - if (logmgr->init(logmgr, log_flags, max_size)) - goto out; - - while (syslog_run) { - if (syslog_rotate) { - logmgr->rotate(logmgr); - syslog_rotate = 0; - } - - handle_data(sfd); - } - - status = EXIT_SUCCESS; -out: - logmgr->cleanup(logmgr); - if (sfd > 0) - close(sfd); - unlink(SYSLOG_SOCKET); - return status; -} -- cgit v1.2.3