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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
755a02c6 | 2 | /*** |
755a02c6 | 3 | Copyright 2012 Lennart Poettering |
755a02c6 LP |
4 | ***/ |
5 | ||
755a02c6 | 6 | #include <errno.h> |
abad76cc | 7 | #include <fcntl.h> |
3f6fd1ba LP |
8 | #include <getopt.h> |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <unistd.h> | |
755a02c6 | 12 | |
3f6fd1ba | 13 | #include "sd-journal.h" |
755a02c6 | 14 | |
3ffd4af2 | 15 | #include "fd-util.h" |
6bedfcbb | 16 | #include "parse-util.h" |
07630cea | 17 | #include "string-util.h" |
7ccbd1ae | 18 | #include "syslog-util.h" |
755a02c6 | 19 | #include "util.h" |
755a02c6 | 20 | |
2afcd690 | 21 | static const char *arg_identifier = NULL; |
d508ac0b | 22 | static int arg_priority = LOG_INFO; |
755a02c6 LP |
23 | static bool arg_level_prefix = true; |
24 | ||
601185b4 | 25 | static void help(void) { |
755a02c6 LP |
26 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" |
27 | "Execute process with stdout/stderr connected to the journal.\n\n" | |
28 | " -h --help Show this help\n" | |
29 | " --version Show package version\n" | |
30 | " -t --identifier=STRING Set syslog identifier\n" | |
31 | " -p --priority=PRIORITY Set priority value (0..7)\n" | |
601185b4 ZJS |
32 | " --level-prefix=BOOL Control whether level prefix shall be parsed\n" |
33 | , program_invocation_short_name); | |
755a02c6 LP |
34 | } |
35 | ||
36 | static int parse_argv(int argc, char *argv[]) { | |
37 | ||
38 | enum { | |
39 | ARG_VERSION = 0x100, | |
40 | ARG_LEVEL_PREFIX | |
41 | }; | |
42 | ||
43 | static const struct option options[] = { | |
44 | { "help", no_argument, NULL, 'h' }, | |
9aac0b2c | 45 | { "version", no_argument, NULL, ARG_VERSION }, |
755a02c6 LP |
46 | { "identifier", required_argument, NULL, 't' }, |
47 | { "priority", required_argument, NULL, 'p' }, | |
48 | { "level-prefix", required_argument, NULL, ARG_LEVEL_PREFIX }, | |
eb9da376 | 49 | {} |
755a02c6 LP |
50 | }; |
51 | ||
52 | int c; | |
53 | ||
54 | assert(argc >= 0); | |
55 | assert(argv); | |
56 | ||
601185b4 | 57 | while ((c = getopt_long(argc, argv, "+ht:p:", options, NULL)) >= 0) |
755a02c6 LP |
58 | |
59 | switch (c) { | |
60 | ||
61 | case 'h': | |
601185b4 ZJS |
62 | help(); |
63 | return 0; | |
755a02c6 LP |
64 | |
65 | case ARG_VERSION: | |
3f6fd1ba | 66 | return version(); |
755a02c6 LP |
67 | |
68 | case 't': | |
755a02c6 LP |
69 | if (isempty(optarg)) |
70 | arg_identifier = NULL; | |
2afcd690 LP |
71 | else |
72 | arg_identifier = optarg; | |
755a02c6 LP |
73 | break; |
74 | ||
75 | case 'p': | |
76 | arg_priority = log_level_from_string(optarg); | |
77 | if (arg_priority < 0) { | |
78 | log_error("Failed to parse priority value."); | |
e4603df5 | 79 | return -EINVAL; |
755a02c6 LP |
80 | } |
81 | break; | |
82 | ||
83 | case ARG_LEVEL_PREFIX: { | |
84 | int k; | |
85 | ||
86 | k = parse_boolean(optarg); | |
939c173f LP |
87 | if (k < 0) |
88 | return log_error_errno(k, "Failed to parse level prefix value."); | |
89 | ||
755a02c6 LP |
90 | arg_level_prefix = k; |
91 | break; | |
92 | } | |
93 | ||
eb9da376 | 94 | case '?': |
755a02c6 | 95 | return -EINVAL; |
eb9da376 LP |
96 | |
97 | default: | |
98 | assert_not_reached("Unhandled option"); | |
755a02c6 | 99 | } |
755a02c6 LP |
100 | |
101 | return 1; | |
102 | } | |
103 | ||
104 | int main(int argc, char *argv[]) { | |
939c173f LP |
105 | _cleanup_close_ int fd = -1, saved_stderr = -1; |
106 | int r; | |
755a02c6 LP |
107 | |
108 | log_parse_environment(); | |
109 | log_open(); | |
110 | ||
111 | r = parse_argv(argc, argv); | |
112 | if (r <= 0) | |
113 | goto finish; | |
114 | ||
115 | fd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix); | |
116 | if (fd < 0) { | |
939c173f | 117 | r = log_error_errno(fd, "Failed to create stream fd: %m"); |
755a02c6 LP |
118 | goto finish; |
119 | } | |
120 | ||
121 | saved_stderr = fcntl(STDERR_FILENO, F_DUPFD_CLOEXEC, 3); | |
122 | ||
2b33ab09 LP |
123 | r = rearrange_stdio(STDIN_FILENO, fd, fd); /* Invalidates fd on succcess + error! */ |
124 | fd = -1; | |
125 | if (r < 0) { | |
126 | log_error_errno(r, "Failed to rearrange stdout/stderr: %m"); | |
755a02c6 LP |
127 | goto finish; |
128 | } | |
129 | ||
755a02c6 | 130 | if (argc <= optind) |
939c173f | 131 | (void) execl("/bin/cat", "/bin/cat", NULL); |
755a02c6 | 132 | else |
939c173f | 133 | (void) execvp(argv[optind], argv + optind); |
9aac0b2c LP |
134 | r = -errno; |
135 | ||
755a02c6 LP |
136 | /* Let's try to restore a working stderr, so we can print the error message */ |
137 | if (saved_stderr >= 0) | |
939c173f | 138 | (void) dup3(saved_stderr, STDERR_FILENO, 0); |
755a02c6 | 139 | |
da927ba9 | 140 | log_error_errno(r, "Failed to execute process: %m"); |
755a02c6 LP |
141 | |
142 | finish: | |
755a02c6 LP |
143 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
144 | } |