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systemctl: add --value option 

With this option, systemctl will only print the rhs in show:
$ systemctl show -p Wants,After systemd-journald --value
systemd-journald.socket ...
systemd-journald-dev-log.socket ...

This is useful in scripts, because the need to call awk or similar
is removed.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2015-08-02 14:22:10 -04:00
parent 897d202923
commit 4f9a91055c
5 changed files with 87 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
man/systemctl.xml
View File

@ -232,6 +232,16 @@
</listitem>
</varlistentry>
<varlistentry>
<term><option>--value</option></term>
<listitem>
<para>When printing properties with <command>show</command>,
only print the value, and skip the property name and
<literal>=</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--show-types</option></term>

2
src/login/loginctl.c
View File

@ -757,7 +757,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
break;
}
r = bus_print_property(name, m, arg_all);
r = bus_print_property(name, m, false, arg_all);
if (r < 0)
return bus_log_parse_error(r);

42
src/shared/bus-util.c
View File

@ -712,7 +712,15 @@ int bus_connect_user_systemd(sd_bus **_bus) {
return 0;
}
int bus_print_property(const char *name, sd_bus_message *property, bool all) {
#define print_property(name, fmt, ...) \
do { \
if (value) \
printf(fmt "\n", __VA_ARGS__); \
else \
printf("%s=" fmt "\n", name, __VA_ARGS__); \
} while(0)
int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all) {
char type;
const char *contents;
int r;
@ -740,7 +748,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (!escaped)
return -ENOMEM;
printf("%s=%s\n", name, escaped);
print_property(name, "%s", escaped);
}
return 1;
@ -753,7 +761,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (r < 0)
return r;
printf("%s=%s\n", name, yes_no(b));
print_property(name, "%s", yes_no(b));
return 1;
}
@ -773,14 +781,14 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
t = format_timestamp(timestamp, sizeof(timestamp), u);
if (t || all)
printf("%s=%s\n", name, strempty(t));
print_property(name, "%s", strempty(t));
} else if (strstr(name, "USec")) {
char timespan[FORMAT_TIMESPAN_MAX];
printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));
print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
} else
printf("%s=%llu\n", name, (unsigned long long) u);
print_property(name, "%"PRIu64, u);
return 1;
}
@ -792,7 +800,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (r < 0)
return r;
printf("%s=%lld\n", name, (long long) i);
print_property(name, "%"PRIi64, i);
return 1;
}
@ -805,9 +813,9 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
return r;
if (strstr(name, "UMask") || strstr(name, "Mode"))
printf("%s=%04o\n", name, u);
print_property(name, "%04o", u);
else
printf("%s=%u\n", name, (unsigned) u);
print_property(name, "%"PRIu32, u);
return 1;
}
@ -819,7 +827,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (r < 0)
return r;
printf("%s=%i\n", name, (int) i);
print_property(name, "%"PRIi32, i);
return 1;
}
@ -830,7 +838,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (r < 0)
return r;
printf("%s=%g\n", name, d);
print_property(name, "%g", d);
return 1;
}
@ -846,7 +854,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
_cleanup_free_ char *escaped = NULL;
if (first)
if (first && !value)
printf("%s=", name);
escaped = xescape(str, "\n ");
@ -860,7 +868,7 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (r < 0)
return r;
if (first && all)
if (first && all && !value)
printf("%s=", name);
if (!first || all)
puts("");
@ -882,7 +890,8 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (all || n > 0) {
unsigned int i;
printf("%s=", name);
if (!value)
printf("%s=", name);
for (i = 0; i < n; i++)
printf("%02x", u[i]);
@ -903,7 +912,8 @@ int bus_print_property(const char *name, sd_bus_message *property, bool all) {
if (all || n > 0) {
unsigned int i;
printf("%s=", name);
if (!value)
printf("%s=", name);
for (i = 0; i < n; i++)
printf("%08x", u[i]);
@ -960,7 +970,7 @@ int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, ch
if (r < 0)
return r;
r = bus_print_property(name, reply, all);
r = bus_print_property(name, reply, false, all);
if (r < 0)
return r;
if (r == 0) {

2
src/shared/bus-util.h
View File

@ -78,7 +78,7 @@ int bus_connect_user_systemd(sd_bus **_bus);
int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **bus);
int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus);
int bus_print_property(const char *name, sd_bus_message *property, bool all);
int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all);
int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool all);
int bus_property_get_bool(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);

78
src/systemctl/systemctl.c
View File

@ -103,6 +103,7 @@ static bool arg_no_pager = false;
static bool arg_no_wtmp = false;
static bool arg_no_wall = false;
static bool arg_no_reload = false;
static bool arg_value = false;
static bool arg_show_types = false;
static bool arg_ignore_inhibitors = false;
static bool arg_dry = false;
@ -4111,6 +4112,14 @@ skip:
return 0;
}
#define print_prop(name, fmt, ...) \
do { \
if (arg_value) \
printf(fmt "\n", __VA_ARGS__); \
else \
printf("%s=" fmt "\n", name, __VA_ARGS__); \
} while(0)
static int print_property(const char *name, sd_bus_message *m, const char *contents) {
int r;
@ -4138,9 +4147,9 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
if (u > 0)
printf("%s=%"PRIu32"\n", name, u);
print_prop(name, "%"PRIu32, u);
else if (arg_all)
printf("%s=\n", name);
print_prop(name, "%s", "");
return 0;
@ -4152,7 +4161,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
if (arg_all || !isempty(s))
printf("%s=%s\n", name, s);
print_prop(name, "%s", s);
return 0;
@ -4164,7 +4173,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
if (arg_all || !isempty(a) || !isempty(b))
printf("%s=%s \"%s\"\n", name, strempty(a), strempty(b));
print_prop(name, "%s \"%s\"", strempty(a), strempty(b));
return 0;
} else if (streq_ptr(name, "SystemCallFilter")) {
@ -4191,8 +4200,10 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
bool first = true;
char **i;
fputs(name, stdout);
fputc('=', stdout);
if (!arg_value) {
fputs(name, stdout);
fputc('=', stdout);
}
if (!whitelist)
fputc('~', stdout);
@ -4224,7 +4235,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(sb)", &path, &ignore)) > 0)
printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
print_prop("EnvironmentFile", "%s (ignore_errors=%s)\n", path, yes_no(ignore));
if (r < 0)
return bus_log_parse_error(r);
@ -4243,7 +4254,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(ss)", &type, &path)) > 0)
printf("%s=%s\n", type, path);
print_prop(type, "%s", path);
if (r < 0)
return bus_log_parse_error(r);
@ -4261,7 +4272,10 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(ss)", &type, &path)) > 0)
printf("Listen%s=%s\n", type, path);
if (arg_value)
puts(path);
else
printf("Listen%s=%s\n", type, path);
if (r < 0)
return bus_log_parse_error(r);
@ -4282,10 +4296,9 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
while ((r = sd_bus_message_read(m, "(stt)", &base, &value, &next_elapse)) > 0) {
char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
printf("%s={ value=%s ; next_elapse=%s }\n",
base,
format_timespan(timespan1, sizeof(timespan1), value, 0),
format_timespan(timespan2, sizeof(timespan2), next_elapse, 0));
print_prop(base, "{ value=%s ; next_elapse=%s }",
format_timespan(timespan1, sizeof(timespan1), value, 0),
format_timespan(timespan2, sizeof(timespan2), next_elapse, 0));
}
if (r < 0)
return bus_log_parse_error(r);
@ -4309,18 +4322,18 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
tt = strv_join(info.argv, " ");
printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid="PID_FMT" ; code=%s ; status=%i%s%s }\n",
name,
strna(info.path),
strna(tt),
yes_no(info.ignore),
strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
info.pid,
sigchld_code_to_string(info.code),
info.status,
info.code == CLD_EXITED ? "" : "/",
strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
print_prop(name,
"{ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid="PID_FMT" ; code=%s ; status=%i%s%s }",
strna(info.path),
strna(tt),
yes_no(info.ignore),
strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
info.pid,
sigchld_code_to_string(info.code),
info.status,
info.code == CLD_EXITED ? "" : "/",
strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
free(info.path);
strv_free(info.argv);
@ -4341,7 +4354,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(ss)", &path, &rwm)) > 0)
printf("%s=%s %s\n", name, strna(path), strna(rwm));
print_prop(name, "%s %s", strna(path), strna(rwm));
if (r < 0)
return bus_log_parse_error(r);
@ -4360,7 +4373,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(st)", &path, &weight)) > 0)
printf("%s=%s %" PRIu64 "\n", name, strna(path), weight);
print_prop(name, "%s %"PRIu64, strna(path), weight);
if (r < 0)
return bus_log_parse_error(r);
@ -4379,7 +4392,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(st)", &path, &bandwidth)) > 0)
printf("%s=%s %" PRIu64 "\n", name, strna(path), bandwidth);
print_prop(name, "%s %"PRIu64, strna(path), bandwidth);
if (r < 0)
return bus_log_parse_error(r);
@ -4393,7 +4406,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
break;
}
r = bus_print_property(name, m, arg_all);
r = bus_print_property(name, m, arg_value, arg_all);
if (r < 0)
return bus_log_parse_error(r);
@ -6238,6 +6251,7 @@ static void systemctl_help(void) {
" --job-mode=MODE Specify how to deal with already queued jobs, when\n"
" queueing a new job\n"
" --show-types When showing sockets, explicitly show their type\n"
" --value When showing properties, only print the value\n"
" -i --ignore-inhibitors\n"
" When shutting down or sleeping, ignore inhibitors\n"
" --kill-who=WHO Who to send signal to\n"
@ -6489,6 +6503,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
ARG_SHOW_TYPES,
ARG_IRREVERSIBLE,
ARG_IGNORE_DEPENDENCIES,
ARG_VALUE,
ARG_VERSION,
ARG_USER,
ARG_SYSTEM,
@ -6530,6 +6545,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
{ "irreversible", no_argument, NULL, ARG_IRREVERSIBLE }, /* compatibility only */
{ "ignore-dependencies", no_argument, NULL, ARG_IGNORE_DEPENDENCIES }, /* compatibility only */
{ "ignore-inhibitors", no_argument, NULL, 'i' },
{ "value", no_argument, NULL, ARG_VALUE },
{ "user", no_argument, NULL, ARG_USER },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "global", no_argument, NULL, ARG_GLOBAL },
@ -6681,6 +6697,10 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
arg_show_types = true;
break;
case ARG_VALUE:
arg_value = true;
break;
case ARG_JOB_MODE:
arg_job_mode = optarg;
break;