/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <errno.h>
#include <fcntl.h>
#include "sd-journal.h"
+#include "alloc-util.h"
#include "fd-util.h"
+#include "main-func.h"
#include "parse-util.h"
+#include "pretty-print.h"
#include "string-util.h"
#include "syslog-util.h"
#include "util.h"
static const char *arg_identifier = NULL;
static int arg_priority = LOG_INFO;
+static int arg_stderr_priority = -1;
static bool arg_level_prefix = true;
-static void help(void) {
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-cat", "1", &link);
+ if (r < 0)
+ return log_oom();
+
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Execute process with stdout/stderr connected to the journal.\n\n"
- " -h --help Show this help\n"
- " --version Show package version\n"
- " -t --identifier=STRING Set syslog identifier\n"
- " -p --priority=PRIORITY Set priority value (0..7)\n"
- " --level-prefix=BOOL Control whether level prefix shall be parsed\n"
- , program_invocation_short_name);
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " -t --identifier=STRING Set syslog identifier\n"
+ " -p --priority=PRIORITY Set priority value (0..7)\n"
+ " --stderr-priority=PRIORITY Set priority value (0..7) used for stderr\n"
+ " --level-prefix=BOOL Control whether level prefix shall be parsed\n"
+ "\nSee the %s for details.\n"
+ , program_invocation_short_name
+ , link
+ );
+
+ return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
+ ARG_STDERR_PRIORITY,
ARG_LEVEL_PREFIX
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "identifier", required_argument, NULL, 't' },
- { "priority", required_argument, NULL, 'p' },
- { "level-prefix", required_argument, NULL, ARG_LEVEL_PREFIX },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "identifier", required_argument, NULL, 't' },
+ { "priority", required_argument, NULL, 'p' },
+ { "stderr-priority", required_argument, NULL, ARG_STDERR_PRIORITY },
+ { "level-prefix", required_argument, NULL, ARG_LEVEL_PREFIX },
{}
};
case 'p':
arg_priority = log_level_from_string(optarg);
- if (arg_priority < 0) {
- log_error("Failed to parse priority value.");
- return -EINVAL;
- }
+ if (arg_priority < 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to parse priority value.");
+ break;
+
+ case ARG_STDERR_PRIORITY:
+ arg_stderr_priority = log_level_from_string(optarg);
+ if (arg_stderr_priority < 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to parse stderr priority value.");
break;
case ARG_LEVEL_PREFIX: {
return 1;
}
-int main(int argc, char *argv[]) {
- _cleanup_close_ int fd = -1, saved_stderr = -1;
+static int run(int argc, char *argv[]) {
+ _cleanup_close_ int outfd = -1, errfd = -1, saved_stderr = -1;
int r;
log_parse_environment();
r = parse_argv(argc, argv);
if (r <= 0)
- goto finish;
+ return r;
- fd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix);
- if (fd < 0) {
- r = log_error_errno(fd, "Failed to create stream fd: %m");
- goto finish;
+ outfd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix);
+ if (outfd < 0)
+ return log_error_errno(outfd, "Failed to create stream fd: %m");
+
+ if (arg_stderr_priority >= 0 && arg_stderr_priority != arg_priority) {
+ errfd = sd_journal_stream_fd(arg_identifier, arg_stderr_priority, arg_level_prefix);
+ if (errfd < 0)
+ return log_error_errno(errfd, "Failed to create stream fd: %m");
}
saved_stderr = fcntl(STDERR_FILENO, F_DUPFD_CLOEXEC, 3);
- if (dup3(fd, STDOUT_FILENO, 0) < 0 ||
- dup3(fd, STDERR_FILENO, 0) < 0) {
- r = log_error_errno(errno, "Failed to duplicate fd: %m");
- goto finish;
- }
-
- if (fd >= 3)
- safe_close(fd);
- fd = -1;
+ r = rearrange_stdio(STDIN_FILENO, outfd, errfd < 0 ? outfd : errfd); /* Invalidates fd on success + error! */
+ TAKE_FD(outfd);
+ TAKE_FD(errfd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to rearrange stdout/stderr: %m");
if (argc <= optind)
(void) execl("/bin/cat", "/bin/cat", NULL);
if (saved_stderr >= 0)
(void) dup3(saved_stderr, STDERR_FILENO, 0);
- log_error_errno(r, "Failed to execute process: %m");
-
-finish:
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return log_error_errno(r, "Failed to execute process: %m");
}
+
+DEFINE_MAIN_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff