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journal-cat: various modernizations

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This commit is contained in:
Lennart Poettering 2015-09-23 19:39:51 +02:00
parent e4603df5cf
commit 939c173f60
1 changed files with 9 additions and 15 deletions
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24
src/journal/cat.c
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@ -100,10 +100,9 @@ static int parse_argv(int argc, char *argv[]) {
int k;
k = parse_boolean(optarg);
if (k < 0) {
log_error("Failed to parse level prefix value.");
return k;
}
if (k < 0)
return log_error_errno(k, "Failed to parse level prefix value.");
arg_level_prefix = k;
break;
}
@ -119,7 +118,8 @@ static int parse_argv(int argc, char *argv[]) {
}
int main(int argc, char *argv[]) {
int r, fd = -1, saved_stderr = -1;
_cleanup_close_ int fd = -1, saved_stderr = -1;
int r;
log_parse_environment();
log_open();
@ -130,8 +130,7 @@ int main(int argc, char *argv[]) {
fd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix);
if (fd < 0) {
log_error_errno(fd, "Failed to create stream fd: %m");
r = fd;
r = log_error_errno(fd, "Failed to create stream fd: %m");
goto finish;
}
@ -145,25 +144,20 @@ int main(int argc, char *argv[]) {
if (fd >= 3)
safe_close(fd);
fd = -1;
if (argc <= optind)
execl("/bin/cat", "/bin/cat", NULL);
(void) execl("/bin/cat", "/bin/cat", NULL);
else
execvp(argv[optind], argv + optind);
(void) execvp(argv[optind], argv + optind);
r = -errno;
/* Let's try to restore a working stderr, so we can print the error message */
if (saved_stderr >= 0)
dup3(saved_stderr, STDERR_FILENO, 0);
(void) dup3(saved_stderr, STDERR_FILENO, 0);
log_error_errno(r, "Failed to execute process: %m");
finish:
safe_close(fd);
safe_close(saved_stderr);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}