X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fjournal%2Fjournalctl.c;h=daf428106518a55632d0297e282aafd419250b19;hp=4c20ff66a89eaaa4135ac3540b3d69d0f9647487;hb=509407003de0c77259e5e46b567d2a464acbb6f4;hpb=86aa7ba4f9969bbfc75ebd51f944313695f1a0a1
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 4c20ff66a..daf428106 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -6,16 +6,16 @@
Copyright 2011 Lennart Poettering
systemd 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 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
@@ -29,31 +29,44 @@
#include
#include
#include
+#include
+
+#include
-#include "sd-journal.h"
#include "log.h"
#include "util.h"
#include "build.h"
#include "pager.h"
#include "logs-show.h"
-static output_mode arg_output = OUTPUT_SHORT;
+#define SD_JOURNALCTL_EXE "_EXE="
+static OutputMode arg_output = OUTPUT_SHORT;
static bool arg_follow = false;
static bool arg_show_all = false;
static bool arg_no_pager = false;
-
+static int arg_lines = -1;
+static bool arg_no_tail = false;
+static bool arg_new_id128 = false;
+static bool arg_quiet = false;
+static bool arg_local = false;
static int help(void) {
- printf("%s [OPTIONS...] {COMMAND} ...\n\n"
- "Send control commands to or query the login manager.\n\n"
+ printf("%s [OPTIONS...] [MATCH]\n\n"
+ "Send control commands to or query the journal.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
- " -a --all Show all properties, including long and unprintable\n"
+ " -a --all Show all fields, including long and unprintable\n"
" -f --follow Follow journal\n"
- " -o --output=STRING Change output mode (short, verbose, export, json)\n",
+ " -n --lines=INTEGER Journal entries to show\n"
+ " --no-tail Show all lines, even in follow mode\n"
+ " -o --output=STRING Change journal output mode (short, short-monotonic,\n"
+ " verbose, export, json, cat)\n"
+ " -q --quiet Don't show privilege warning\n"
+ " --new-id128 Generate a new 128 Bit id\n"
+ " -l --local Only local entries\n",
program_invocation_short_name);
return 0;
@@ -63,7 +76,9 @@ static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
- ARG_NO_PAGER
+ ARG_NO_PAGER,
+ ARG_NO_TAIL,
+ ARG_NEW_ID128
};
static const struct option options[] = {
@@ -73,15 +88,20 @@ static int parse_argv(int argc, char *argv[]) {
{ "follow", no_argument, NULL, 'f' },
{ "output", required_argument, NULL, 'o' },
{ "all", no_argument, NULL, 'a' },
+ { "lines", required_argument, NULL, 'n' },
+ { "no-tail", no_argument, NULL, ARG_NO_TAIL },
+ { "new-id128", no_argument, NULL, ARG_NEW_ID128 },
+ { "quiet", no_argument, NULL, 'q' },
+ { "local", no_argument, NULL, 'l' },
{ NULL, 0, NULL, 0 }
};
- int c;
+ int c, r;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hfo:a", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "hfo:an:ql", options, NULL)) >= 0) {
switch (c) {
@@ -104,24 +124,42 @@ static int parse_argv(int argc, char *argv[]) {
break;
case 'o':
- if (streq(optarg, "short"))
- arg_output = OUTPUT_SHORT;
- else if (streq(optarg, "verbose"))
- arg_output = OUTPUT_VERBOSE;
- else if (streq(optarg, "export"))
- arg_output = OUTPUT_EXPORT;
- else if (streq(optarg, "json"))
- arg_output = OUTPUT_JSON;
- else {
+ arg_output = output_mode_from_string(optarg);
+ if (arg_output < 0) {
log_error("Unknown output '%s'.", optarg);
return -EINVAL;
}
+
break;
case 'a':
arg_show_all = true;
break;
+ case 'n':
+ r = safe_atoi(optarg, &arg_lines);
+ if (r < 0 || arg_lines < 0) {
+ log_error("Failed to parse lines '%s'", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case ARG_NO_TAIL:
+ arg_no_tail = true;
+ break;
+
+ case ARG_NEW_ID128:
+ arg_new_id128 = true;
+ break;
+
+ case 'q':
+ arg_quiet = true;
+ break;
+
+ case 'l':
+ arg_local = true;
+ break;
+
case '?':
return -EINVAL;
@@ -131,13 +169,47 @@ static int parse_argv(int argc, char *argv[]) {
}
}
+ if (arg_follow && !arg_no_tail && arg_lines < 0)
+ arg_lines = 10;
+
return 1;
}
+static int generate_new_id128(void) {
+ sd_id128_t id;
+ int r;
+ unsigned i;
+
+ r = sd_id128_randomize(&id);
+ if (r < 0) {
+ log_error("Failed to generate ID: %s", strerror(-r));
+ return r;
+ }
+
+ printf("As string:\n"
+ SD_ID128_FORMAT_STR "\n\n"
+ "As UUID:\n"
+ "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n"
+ "As macro:\n"
+ "#define MESSAGE_XYZ SD_ID128_MAKE(",
+ SD_ID128_FORMAT_VAL(id),
+ SD_ID128_FORMAT_VAL(id));
+
+ for (i = 0; i < 16; i++)
+ printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
+
+ fputs(")\n", stdout);
+
+ return 0;
+}
+
int main(int argc, char *argv[]) {
int r, i, fd;
sd_journal *j = NULL;
unsigned line = 0;
+ bool need_seek = false;
+ struct stat st;
+ char* journal_exe_buff;
log_parse_environment();
log_open();
@@ -146,14 +218,42 @@ int main(int argc, char *argv[]) {
if (r <= 0)
goto finish;
- r = sd_journal_open(&j, 0);
+ if (arg_new_id128) {
+ r = generate_new_id128();
+ goto finish;
+ }
+
+#ifdef HAVE_ACL
+ if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
+ log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off.");
+#endif
+
+ r = sd_journal_open(&j, arg_local ? SD_JOURNAL_LOCAL_ONLY : 0);
if (r < 0) {
log_error("Failed to open journal: %s", strerror(-r));
goto finish;
}
for (i = optind; i < argc; i++) {
- r = sd_journal_add_match(j, argv[i], strlen(argv[i]));
+ if (strchr(argv[i], '=')) {
+ r = sd_journal_add_match(j, argv[i], strlen(argv[i]));
+ } else {
+ if (stat(argv[i], &st) < 0) {
+ log_error("Failed to add match: %s", strerror(-r));
+ goto finish; /* maybe try sd_journal_add_match() when stat() fails,
+ * even thought we know there is no '=' ? */
+ } else if (S_ISREG(st.st_mode) &&
+ S_IXUSR & st.st_mode) {
+ journal_exe_buff = malloc(strlen(SD_JOURNALCTL_EXE) + strlen(argv[i]) + 1);
+ journal_exe_buff = strcpy(journal_exe_buff, SD_JOURNALCTL_EXE);
+ strncat(journal_exe_buff, argv[i], strlen(argv[i]));
+ r = sd_journal_add_match(j, journal_exe_buff, strlen(journal_exe_buff));
+ free(journal_exe_buff);
+ } else {
+ log_error("File is not a regular file or is not executable: %s", argv[i]);
+ goto finish;
+ }
+ }
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
goto finish;
@@ -166,9 +266,26 @@ int main(int argc, char *argv[]) {
goto finish;
}
- r = sd_journal_seek_head(j);
+ if (arg_lines >= 0) {
+ r = sd_journal_seek_tail(j);
+ if (r < 0) {
+ log_error("Failed to seek to tail: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_journal_previous_skip(j, arg_lines);
+ } else {
+ r = sd_journal_seek_head(j);
+ if (r < 0) {
+ log_error("Failed to seek to head: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_journal_next(j);
+ }
+
if (r < 0) {
- log_error("Failed to seek to head: %s", strerror(-r));
+ log_error("Failed to iterate through journal: %s", strerror(-r));
goto finish;
}
@@ -183,14 +300,13 @@ int main(int argc, char *argv[]) {
}
for (;;) {
- struct pollfd pollfd;
-
for (;;) {
- r = sd_journal_next(j);
-
- if (r < 0) {
- log_error("Failed to iterate through journal: %s", strerror(-r));
- goto finish;
+ if (need_seek) {
+ r = sd_journal_next(j);
+ if (r < 0) {
+ log_error("Failed to iterate through journal: %s", strerror(-r));
+ goto finish;
+ }
}
if (r == 0)
@@ -198,24 +314,19 @@ int main(int argc, char *argv[]) {
line ++;
- r = output_journal(j, arg_output, line, arg_show_all);
+ r = output_journal(j, arg_output, line, 0, arg_show_all);
if (r < 0)
goto finish;
+
+ need_seek = true;
}
if (!arg_follow)
break;
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = POLLIN;
-
- if (poll(&pollfd, 1, -1) < 0) {
- if (errno == EINTR)
- break;
-
- log_error("poll(): %m");
- r = -errno;
+ r = fd_wait_for_event(fd, POLLIN, (usec_t) -1);
+ if (r < 0) {
+ log_error("Couldn't wait for event: %s", strerror(-r));
goto finish;
}