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rc-status: add -f option to allow formatting output

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The -f option can be used when showing the status of services in
runlevels to allow making the output more easily parsable.
Currently, the .ini format is the only one supported.
This commit is contained in:
William Hubbs 2019-02-15 14:21:43 -06:00
parent f43cec34ca
commit 427a1ce299
3 changed files with 81 additions and 38 deletions
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5
NEWS.md
View File

@ -6,6 +6,11 @@ the information in this file is in reverse order.
## OpenRC 0.41.
This version adds the ability to format the output of rc-status when
showing the status of services in a runlevel so that it may be parsed.
Currently, the -f switch only accepts ini as an argument which
causes the output to be in the .ini format.
This version adds an experimental build time switch to allow setting the
default shell to use for service scripts.
By default, this is set to /bin/sh if it is changed, the new shell must

4
man/rc-status.8
View File

@ -17,6 +17,7 @@
.Sh SYNOPSIS
.Nm
.Op Fl aclsuC
.Op Fl f Ar ini
.Op Ar runlevel
.Sh DESCRIPTION
.Nm
@ -37,6 +38,9 @@ The options are as follows:
Show all runlevels and their services.
.It Fl c , -crashed
List all services that have crashed.
.It Fl f , -format
Select a format for the output. Currently, the only one that can be
specified is ini, which outputs in *.ini format.
.It Fl l , -list
List all defined runlevels.
.It Fl m , -manual

90
src/rc/rc-status.c
View File

@ -27,12 +27,18 @@
#include "rc-misc.h"
#include "_usage.h"
enum format_t {
FORMAT_DEFAULT,
FORMAT_INI,
};
const char *applet = NULL;
const char *extraopts = NULL;
const char *getoptstring = "aclmrsSu" getoptstring_COMMON;
const char *getoptstring = "acf:lmrsSu" getoptstring_COMMON;
const struct option longopts[] = {
{"all", 0, NULL, 'a'},
{"crashed", 0, NULL, 'c'},
{"format", 1, NULL, 'f'},
{"list", 0, NULL, 'l'},
{"manual", 0, NULL, 'm'},
{"runlevel", 0, NULL, 'r'},
@ -44,6 +50,7 @@ const struct option longopts[] = {
const char * const longopts_help[] = {
"Show services from all run levels",
"Show crashed services",
"format status to be parsable (currently arg must be ini)",
"Show list of run levels",
"Show manually started services",
"Show the name of the current runlevel",
@ -53,7 +60,7 @@ const char * const longopts_help[] = {
longopts_help_COMMON
};
const char *usagestring = "" \
"Usage: rc-status [options] <runlevel>...\n" \
"Usage: rc-status [options] -f ini <runlevel>...\n" \
" or: rc-status [options] [-a | -c | -l | -m | -r | -s | -u]";
static RC_DEPTREE *deptree;
@ -62,18 +69,27 @@ static RC_STRINGLIST *types;
static RC_STRINGLIST *levels, *services, *tmp, *alist;
static RC_STRINGLIST *sservices, *nservices, *needsme;
static void print_level(const char *prefix, const char *level)
static void print_level(const char *prefix, const char *level,
enum format_t format)
{
switch (format) {
case FORMAT_DEFAULT:
if (prefix)
printf("%s ", prefix);
printf ("Runlevel: ");
if (isatty(fileno(stdout)))
printf("%s%s%s\n",
ecolor(ECOLOR_HILITE),
level,
ecolor(ECOLOR_NORMAL));
ecolor(ECOLOR_HILITE), level, ecolor(ECOLOR_NORMAL));
else
printf("%s\n", level);
break;
case FORMAT_INI:
printf("%s", "[");
if (prefix)
printf("%s ", prefix);
printf("%s]\n", level);
break;
}
}
static char *get_uptime(const char *service)
@ -124,13 +140,13 @@ static char *get_uptime(const char *service)
return uptime;
}
static void print_service(const char *service)
static void print_service(const char *service, enum format_t format)
{
char *status = NULL;
char *uptime = NULL;
char *child_pid = NULL;
char *start_time = NULL;
int cols = printf(" %s", service);
int cols;
const char *c = ecolor(ECOLOR_GOOD);
RC_SERVICE state = rc_service_state(service);
ECOLOR color = ECOLOR_BAD;
@ -174,13 +190,22 @@ static void print_service(const char *service)
xasprintf(&status, " stopped ");
errno = 0;
switch(format) {
case FORMAT_DEFAULT:
cols = printf(" %s", service);
if (c && *c && isatty(fileno(stdout)))
printf("\n");
ebracket(cols, color, status);
break;
case FORMAT_INI:
printf("%s = %s\n", service, status);
break;
}
free(status);
}
static void print_services(const char *runlevel, RC_STRINGLIST *svcs)
static void print_services(const char *runlevel, RC_STRINGLIST *svcs,
enum format_t format)
{
RC_STRINGLIST *l = NULL;
RC_STRING *s;
@ -194,7 +219,7 @@ static void print_services(const char *runlevel, RC_STRINGLIST *svcs)
TAILQ_FOREACH(s, svcs, entries)
if (!runlevel ||
rc_service_in_runlevel(s->value, runlevel))
print_service(s->value);
print_service(s->value, format);
return;
}
if (!types) {
@ -214,12 +239,12 @@ static void print_services(const char *runlevel, RC_STRINGLIST *svcs)
if (!rc_stringlist_find(svcs, s->value))
continue;
if (!runlevel || rc_service_in_runlevel(s->value, runlevel))
print_service(s->value);
print_service(s->value, format);
}
rc_stringlist_free(l);
}
static void print_stacked_services(const char *runlevel)
static void print_stacked_services(const char *runlevel, enum format_t format)
{
RC_STRINGLIST *stackedlevels, *servicelist;
RC_STRING *stackedlevel;
@ -228,9 +253,9 @@ static void print_stacked_services(const char *runlevel)
TAILQ_FOREACH(stackedlevel, stackedlevels, entries) {
if (rc_stringlist_find(levels, stackedlevel->value) != NULL)
continue;
print_level("Stacked", stackedlevel->value);
print_level("Stacked", stackedlevel->value, format);
servicelist = rc_services_in_runlevel(stackedlevel->value);
print_services(stackedlevel->value, servicelist);
print_services(stackedlevel->value, servicelist, format);
rc_stringlist_free(servicelist);
}
rc_stringlist_free(stackedlevels);
@ -241,6 +266,8 @@ int main(int argc, char **argv)
{
RC_SERVICE state;
RC_STRING *s, *l, *t, *level;
enum format_t format = FORMAT_DEFAULT;
bool levels_given = false;
bool show_all = false;
char *p, *runlevel = NULL;
int opt, retval = 0;
@ -263,6 +290,12 @@ int main(int argc, char **argv)
}
goto exit;
/* NOTREACHED */
case 'f':
if (strcasecmp(optarg, "ini") == 0)
format = FORMAT_INI;
else
eerrorx("%s: invalid argument to --format switch\n", applet);
break;
case 'l':
levels = rc_runlevel_list();
TAILQ_FOREACH(l, levels, entries)
@ -287,7 +320,7 @@ int main(int argc, char **argv)
free(s->value);
free(s);
}
print_services(NULL, services);
print_services(NULL, services, FORMAT_DEFAULT);
goto exit;
case 'r':
runlevel = rc_runlevel_get();
@ -299,12 +332,12 @@ int main(int argc, char **argv)
TAILQ_FOREACH_SAFE(s, services, entries, t)
if (!rc_service_value_get(s->value, "child_pid"))
TAILQ_REMOVE(services, s, entries);
print_services(NULL, services);
print_services(NULL, services, FORMAT_DEFAULT);
goto exit;
/* NOTREACHED */
case 's':
services = rc_services_in_runlevel(NULL);
print_services(NULL, services);
print_services(NULL, services, FORMAT_DEFAULT);
goto exit;
/* NOTREACHED */
case 'u':
@ -319,7 +352,7 @@ int main(int argc, char **argv)
break;
}
}
print_services(NULL, services);
print_services(NULL, services, FORMAT_DEFAULT);
goto exit;
/* NOTREACHED */
@ -331,6 +364,7 @@ int main(int argc, char **argv)
opt = (optind < argc) ? 0 : 1;
while (optind < argc) {
if (rc_runlevel_exists(argv[optind])) {
levels_given = true;
rc_stringlist_add(levels, argv[optind++]);
opt++;
} else
@ -347,21 +381,21 @@ int main(int argc, char **argv)
deptree = _rc_deptree_load(0, NULL);
TAILQ_FOREACH(l, levels, entries) {
print_level(NULL, l->value);
print_level(NULL, l->value, format);
services = rc_services_in_runlevel(l->value);
print_services(l->value, services);
print_stacked_services(l->value);
print_services(l->value, services, format);
print_stacked_services(l->value, format);
rc_stringlist_free(nservices);
nservices = NULL;
rc_stringlist_free(services);
services = NULL;
}
if (show_all || argc < 2) {
if (show_all || !levels_given) {
/* Show hotplugged services */
print_level("Dynamic", "hotplugged");
print_level("Dynamic", "hotplugged", format);
services = rc_services_in_state(RC_SERVICE_HOTPLUGGED);
print_services(NULL, services);
print_services(NULL, services, format);
rc_stringlist_free(services);
services = NULL;
@ -418,10 +452,10 @@ int main(int argc, char **argv)
* be added to the list
*/
unsetenv("RC_SVCNAME");
print_level("Dynamic", "needed/wanted");
print_services(NULL, nservices);
print_level("Dynamic", "manual");
print_services(NULL, services);
print_level("Dynamic", "needed/wanted", format);
print_services(NULL, nservices, format);
print_level("Dynamic", "manual", format);
print_services(NULL, services, format);
}
exit: