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-rw-r--r--syslogd/syslogd.c273
1 files changed, 0 insertions, 273 deletions
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 <https://www.gnu.org/licenses/>.
- */
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <string.h>
-#include <getopt.h>
-#include <errno.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <grp.h>
-
-#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 <size> Automatically rotate log files bigger than this.\n"
-" -u, --user <name> Run the syslog daemon as this user. If not set,\n"
-" try to use the user '" DEFAULT_USER "'.\n"
-" -g, --group <name> 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;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 07:19:30 +0000