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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2017-02-01 22:24:41 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2017-02-01 22:32:19 -0500
commit256c1eba6b9eb31e2e9aa5cf82ed38eb441a6a51 (patch)
treee538cbce22643688be9b84464ff4bbc0d1f0b2ce
parente7aa3f5014d601b91c7bf8f3a20d5b5c1a0a5908 (diff)
cgls: allow --unit, --user-unit to take optional argument
The following are all equivalent: --unit foo.service bar.service --unit=foo.service bar.service --unit=foo.service --unit=bar.service foo.service bar.service --unit Similarly for --user-unit. The only case that doesn't work well is when --unit and --user-unit are mixed: --unit=foo.service --user-unit=bar.service We'll treat both names as user units. I think this is OK.
-rw-r--r--src/cgls/cgls.c41
1 files changed, 27 insertions, 14 deletions
diff --git a/src/cgls/cgls.c b/src/cgls/cgls.c
index b64a0df542..82b4d9ccb3 100644
--- a/src/cgls/cgls.c
+++ b/src/cgls/cgls.c
@@ -34,6 +34,7 @@
#include "output-mode.h"
#include "pager.h"
#include "path-util.h"
+#include "strv.h"
#include "unit-name.h"
#include "util.h"
@@ -46,6 +47,7 @@ static enum {
SHOW_UNIT_SYSTEM,
SHOW_UNIT_USER,
} arg_show_unit = SHOW_UNIT_NONE;
+static char **arg_names = NULL;
static int arg_full = -1;
static char* arg_machine = NULL;
@@ -80,8 +82,8 @@ static int parse_argv(int argc, char *argv[]) {
{ "all", no_argument, NULL, 'a' },
{ "full", no_argument, NULL, 'l' },
{ "machine", required_argument, NULL, 'M' },
- { "unit", no_argument, NULL, 'u' },
- { "user-unit", no_argument, NULL, ARG_USER_UNIT },
+ { "unit", optional_argument, NULL, 'u' },
+ { "user-unit", optional_argument, NULL, ARG_USER_UNIT },
{}
};
@@ -90,7 +92,7 @@ static int parse_argv(int argc, char *argv[]) {
assert(argc >= 1);
assert(argv);
- while ((c = getopt_long(argc, argv, "hkalM:u", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "-hkalM:u::", options, NULL)) >= 0)
switch (c) {
@@ -111,10 +113,20 @@ static int parse_argv(int argc, char *argv[]) {
case 'u':
arg_show_unit = SHOW_UNIT_SYSTEM;
+ if (strv_push(&arg_names, optarg) < 0) /* push optarg if not empty */
+ return log_oom();
break;
case ARG_USER_UNIT:
arg_show_unit = SHOW_UNIT_USER;
+ if (strv_push(&arg_names, optarg) < 0) /* push optarg if not empty */
+ return log_oom();
+ break;
+
+ case 1:
+ /* positional argument */
+ if (strv_push(&arg_names, optarg) < 0)
+ return log_oom();
break;
case 'l':
@@ -174,12 +186,12 @@ int main(int argc, char *argv[]) {
(arg_full > 0) * OUTPUT_FULL_WIDTH |
arg_kernel_threads * OUTPUT_KERNEL_THREADS;
- if (optind < argc) {
+ if (arg_names) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_free_ char *root = NULL;
- int i;
+ char **name;
- for (i = optind; i < argc; i++) {
+ STRV_FOREACH(name, arg_names) {
int q;
if (arg_show_unit != SHOW_UNIT_NONE) {
@@ -197,27 +209,27 @@ int main(int argc, char *argv[]) {
}
}
- q = show_cgroup_get_unit_path_and_warn(bus, argv[i], &cgroup);
+ q = show_cgroup_get_unit_path_and_warn(bus, *name, &cgroup);
if (q < 0)
goto failed;
if (isempty(cgroup)) {
- log_warning("Unit %s not found.", argv[i]);
+ log_warning("Unit %s not found.", *name);
q = -ENOENT;
goto failed;
}
- printf("Unit %s (%s):\n", argv[i], cgroup);
+ printf("Unit %s (%s):\n", *name, cgroup);
fflush(stdout);
q = show_cgroup_by_path(cgroup, NULL, 0, output_flags);
- } else if (path_startswith(argv[i], "/sys/fs/cgroup")) {
+ } else if (path_startswith(*name, "/sys/fs/cgroup")) {
- printf("Directory %s:\n", argv[i]);
+ printf("Directory %s:\n", *name);
fflush(stdout);
- q = show_cgroup_by_path(argv[i], NULL, 0, output_flags);
+ q = show_cgroup_by_path(*name, NULL, 0, output_flags);
} else {
_cleanup_free_ char *c = NULL, *p = NULL, *j = NULL;
const char *controller, *path;
@@ -229,9 +241,9 @@ int main(int argc, char *argv[]) {
goto finish;
}
- r = cg_split_spec(argv[i], &c, &p);
+ r = cg_split_spec(*name, &c, &p);
if (r < 0) {
- log_error_errno(r, "Failed to split argument %s: %m", argv[i]);
+ log_error_errno(r, "Failed to split argument %s: %m", *name);
goto failed;
}
@@ -298,6 +310,7 @@ int main(int argc, char *argv[]) {
finish:
pager_close();
+ free(arg_names); /* don't free the strings */
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}