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755a02c6 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
755a02c6 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
755a02c6 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
755a02c6 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
755a02c6 | 22 | #include <errno.h> |
abad76cc | 23 | #include <fcntl.h> |
3f6fd1ba LP |
24 | #include <getopt.h> |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <unistd.h> | |
755a02c6 | 28 | |
3f6fd1ba | 29 | #include "sd-journal.h" |
755a02c6 | 30 | |
3ffd4af2 | 31 | #include "fd-util.h" |
07630cea | 32 | #include "string-util.h" |
755a02c6 | 33 | #include "util.h" |
755a02c6 LP |
34 | |
35 | static char *arg_identifier = NULL; | |
d508ac0b | 36 | static int arg_priority = LOG_INFO; |
755a02c6 LP |
37 | static bool arg_level_prefix = true; |
38 | ||
601185b4 | 39 | static void help(void) { |
755a02c6 LP |
40 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" |
41 | "Execute process with stdout/stderr connected to the journal.\n\n" | |
42 | " -h --help Show this help\n" | |
43 | " --version Show package version\n" | |
44 | " -t --identifier=STRING Set syslog identifier\n" | |
45 | " -p --priority=PRIORITY Set priority value (0..7)\n" | |
601185b4 ZJS |
46 | " --level-prefix=BOOL Control whether level prefix shall be parsed\n" |
47 | , program_invocation_short_name); | |
755a02c6 LP |
48 | } |
49 | ||
50 | static int parse_argv(int argc, char *argv[]) { | |
51 | ||
52 | enum { | |
53 | ARG_VERSION = 0x100, | |
54 | ARG_LEVEL_PREFIX | |
55 | }; | |
56 | ||
57 | static const struct option options[] = { | |
58 | { "help", no_argument, NULL, 'h' }, | |
9aac0b2c | 59 | { "version", no_argument, NULL, ARG_VERSION }, |
755a02c6 LP |
60 | { "identifier", required_argument, NULL, 't' }, |
61 | { "priority", required_argument, NULL, 'p' }, | |
62 | { "level-prefix", required_argument, NULL, ARG_LEVEL_PREFIX }, | |
eb9da376 | 63 | {} |
755a02c6 LP |
64 | }; |
65 | ||
66 | int c; | |
67 | ||
68 | assert(argc >= 0); | |
69 | assert(argv); | |
70 | ||
601185b4 | 71 | while ((c = getopt_long(argc, argv, "+ht:p:", options, NULL)) >= 0) |
755a02c6 LP |
72 | |
73 | switch (c) { | |
74 | ||
75 | case 'h': | |
601185b4 ZJS |
76 | help(); |
77 | return 0; | |
755a02c6 LP |
78 | |
79 | case ARG_VERSION: | |
3f6fd1ba | 80 | return version(); |
755a02c6 LP |
81 | |
82 | case 't': | |
83 | free(arg_identifier); | |
84 | if (isempty(optarg)) | |
85 | arg_identifier = NULL; | |
86 | else { | |
87 | arg_identifier = strdup(optarg); | |
0d0f0c50 SL |
88 | if (!arg_identifier) |
89 | return log_oom(); | |
755a02c6 LP |
90 | } |
91 | break; | |
92 | ||
93 | case 'p': | |
94 | arg_priority = log_level_from_string(optarg); | |
95 | if (arg_priority < 0) { | |
96 | log_error("Failed to parse priority value."); | |
e4603df5 | 97 | return -EINVAL; |
755a02c6 LP |
98 | } |
99 | break; | |
100 | ||
101 | case ARG_LEVEL_PREFIX: { | |
102 | int k; | |
103 | ||
104 | k = parse_boolean(optarg); | |
939c173f LP |
105 | if (k < 0) |
106 | return log_error_errno(k, "Failed to parse level prefix value."); | |
107 | ||
755a02c6 LP |
108 | arg_level_prefix = k; |
109 | break; | |
110 | } | |
111 | ||
eb9da376 | 112 | case '?': |
755a02c6 | 113 | return -EINVAL; |
eb9da376 LP |
114 | |
115 | default: | |
116 | assert_not_reached("Unhandled option"); | |
755a02c6 | 117 | } |
755a02c6 LP |
118 | |
119 | return 1; | |
120 | } | |
121 | ||
122 | int main(int argc, char *argv[]) { | |
939c173f LP |
123 | _cleanup_close_ int fd = -1, saved_stderr = -1; |
124 | int r; | |
755a02c6 LP |
125 | |
126 | log_parse_environment(); | |
127 | log_open(); | |
128 | ||
129 | r = parse_argv(argc, argv); | |
130 | if (r <= 0) | |
131 | goto finish; | |
132 | ||
133 | fd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix); | |
134 | if (fd < 0) { | |
939c173f | 135 | r = log_error_errno(fd, "Failed to create stream fd: %m"); |
755a02c6 LP |
136 | goto finish; |
137 | } | |
138 | ||
139 | saved_stderr = fcntl(STDERR_FILENO, F_DUPFD_CLOEXEC, 3); | |
140 | ||
141 | if (dup3(fd, STDOUT_FILENO, 0) < 0 || | |
142 | dup3(fd, STDERR_FILENO, 0) < 0) { | |
76ef789d | 143 | r = log_error_errno(errno, "Failed to duplicate fd: %m"); |
755a02c6 LP |
144 | goto finish; |
145 | } | |
146 | ||
147 | if (fd >= 3) | |
03e334a1 | 148 | safe_close(fd); |
755a02c6 LP |
149 | fd = -1; |
150 | ||
151 | if (argc <= optind) | |
939c173f | 152 | (void) execl("/bin/cat", "/bin/cat", NULL); |
755a02c6 | 153 | else |
939c173f | 154 | (void) execvp(argv[optind], argv + optind); |
9aac0b2c LP |
155 | r = -errno; |
156 | ||
755a02c6 LP |
157 | /* Let's try to restore a working stderr, so we can print the error message */ |
158 | if (saved_stderr >= 0) | |
939c173f | 159 | (void) dup3(saved_stderr, STDERR_FILENO, 0); |
755a02c6 | 160 | |
da927ba9 | 161 | log_error_errno(r, "Failed to execute process: %m"); |
755a02c6 LP |
162 | |
163 | finish: | |
755a02c6 LP |
164 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
165 | } |