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/*
rc-depend
rc service dependency and ordering
*/
/*
* Copyright 2007 Gentoo Foundation
* Copyright 2007 Roy Marples
* All rights reserved
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define APPLET "rc-depend"
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "builtins.h"
#include "einfo.h"
#include "rc.h"
#include "rc-misc.h"
#include "strlist.h"
rc_depinfo_t *_rc_deptree_load (void) {
if (rc_deptree_update_needed ()) {
int retval;
ebegin ("Caching service dependencies");
retval = rc_deptree_update ();
eend (retval ? 0 : -1, "Failed to update the dependency tree");
}
return (rc_deptree_load ());
}
static char *applet = NULL;
#include "_usage.h"
#define getoptstring "t:suT" getoptstring_COMMON
static struct option longopts[] = {
{ "type", 1, NULL, 't'},
{ "notrace", 0, NULL, 'T'},
{ "strict", 0, NULL, 's'},
{ "update", 0, NULL, 'u'},
longopts_COMMON
};
static const char * const longopts_help[] = {
"Type(s) of dependency to list",
"Don't trace service dependencies",
"Only use what is in the runlevels",
"Force an update of the dependency tree",
longopts_help_COMMON
};
#include "_usage.c"
int rc_depend (int argc, char **argv)
{
char **types = NULL;
char **services = NULL;
char **depends = NULL;
char **list;
rc_depinfo_t *deptree = NULL;
char *service;
int options = RC_DEP_TRACE;
bool first = true;
int i;
bool update = false;
char *runlevel = xstrdup( getenv ("RC_SOFTLEVEL"));
int opt;
char *token;
applet = argv[0];
while ((opt = getopt_long (argc, argv, getoptstring,
longopts, (int *) 0)) != -1)
{
switch (opt) {
case 's':
options |= RC_DEP_STRICT;
break;
case 't':
while ((token = strsep (&optarg, ",")))
rc_strlist_addu (&types, token);
break;
case 'u':
update = true;
break;
case 'T':
options &= RC_DEP_TRACE;
break;
case_RC_COMMON_GETOPT
}
}
if (update) {
bool u = false;
ebegin ("Caching service dependencies");
u = rc_deptree_update ();
eend (u ? 0 : -1, "%s: %s", applet, strerror (errno));
if (! u)
eerrorx ("Failed to update the dependency tree");
}
if (! (deptree = _rc_deptree_load ()))
eerrorx ("failed to load deptree");
if (! runlevel)
runlevel = rc_runlevel_get ();
while (optind < argc) {
list = NULL;
rc_strlist_add (&list, argv[optind]);
errno = 0;
depends = rc_deptree_depends (deptree, NULL, (const char **) list,
runlevel, 0);
if (! depends && errno == ENOENT)
eerror ("no dependency info for service `%s'", argv[optind]);
else
rc_strlist_add (&services, argv[optind]);
rc_strlist_free (depends);
rc_strlist_free (list);
optind++;
}
if (! services) {
rc_strlist_free (types);
rc_deptree_free (deptree);
free (runlevel);
if (update)
return (EXIT_SUCCESS);
eerrorx ("no services specified");
}
/* If we don't have any types, then supply some defaults */
if (! types) {
rc_strlist_add (&types, "ineed");
rc_strlist_add (&types, "iuse");
}
depends = rc_deptree_depends (deptree, (const char **) types,
(const char **) services, runlevel, options);
if (depends) {
STRLIST_FOREACH (depends, service, i) {
if (first)
first = false;
else
printf (" ");
if (service)
printf ("%s", service);
}
printf ("\n");
}
rc_strlist_free (types);
rc_strlist_free (services);
rc_strlist_free (depends);
rc_deptree_free (deptree);
free (runlevel);
return (EXIT_SUCCESS);
}
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