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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <error.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
#include <glob.h>
#include "installrm.h"
#include "rcint.h"
static bool installrm_verbose = false;
static void install_level_links(const initd_list_t *ilp,
const struct rcpair *rcp, initd_sk_t sk);
static void remove_existing_link(const initd_t *ip, const char *rdir,
initd_sk_t sk);
static void install_new_link(const initd_t *ip, const struct rcpair *rcp,
initd_sk_t sk, int *prio);
static void set_current_priority(initd_sk_t sk, int *prio);
bool initd_installrm_links(const initd_list_t *ilp, const char *dir,
initd_sk_t sk)
{
bool ret = false;
char *cwd;
struct rcpair *cur;
struct stat sbuf;
if (!ilp)
goto out;
/* move to the init.d directory */
cwd = get_current_dir_name();
if (chdir(dir) != 0)
error(1, errno, "%s", dir);
/* See if we can can find an existing sysinit directory */
for (cur = rcsdirs; cur->dir; cur++) {
if (stat(cur->dir, &sbuf) != 0) {
if (errno != ENOENT)
error(1, errno, "%s", cur->dir);
} else {
/* found one */
break;
}
}
/* Fallback if no existing sysinit directory found */
if (!cur->dir)
cur = rcsdirs;
/* Write the links for the sysinit directory */
install_level_links(ilp, cur, sk);
/* Loop over the rest of the directories */
for (cur = rcdirs; cur->dir; cur++)
install_level_links(ilp, cur, sk);
/* Return to the original directory */
if (chdir(cwd) != 0)
error(1, errno, "%s", cwd);
free(cwd);
ret = true;
out:
return ret;
}
void initd_installrm_set_verbose(bool verbose)
{
installrm_verbose = verbose;
}
static void install_level_links(const initd_list_t *ilp,
const struct rcpair *rcp, initd_sk_t sk)
{
initd_t *ip;
initd_rc_t rc = rcp->rc;
char *dir = rcp->dir;
/* Counters for next link (S20foo, S21bar, ...). Start at 0
* and count up for start links, start at 99 and count down
* for stop links. */
int sk_prio = (sk == SK_START) ? 0 : 99;
#if 0
if (installrm_verbose) {
fprintf(stderr, "Installing %s links in %s\n",
(sk == SK_START) ? "start" : "stop", dir);
}
#endif
/* Change to the rc directory */
if (chdir(dir) != 0)
error(1, errno, "%s", dir);
/* First remove existing links, beginning with the head of the
* list for start links. */
if (sk == SK_START) {
for (ip = ilp->first; ip; ip = ip->next) {
/* skip script if not active in this level */
if (!initd_is_active(ip, rc, KEY_ASTART))
continue;
remove_existing_link(ip, dir, sk);
}
} else {
for (ip = ilp->last; ip; ip = ip->prev) {
/* skip script if not active in this level */
if (!initd_is_active(ip, rc, KEY_ASTOP))
continue;
remove_existing_link(ip, dir, sk);
}
}
/* Then install new links */
if (sk == SK_START) {
for (ip = ilp->first; ip; ip = ip->next)
install_new_link(ip, rcp, sk, &sk_prio);
} else {
for (ip = ilp->last; ip; ip = ip->prev)
install_new_link(ip, rcp, sk, &sk_prio);
}
}
static void remove_existing_link(const initd_t *ip, const char *rdir,
initd_sk_t sk)
{
strarg_t *links;
int n, nlinks;
if (sk == SK_START)
links = ip->astart_links;
else
links = ip->astop_links;
/* See if any of the links exist in this directory */
nlinks = strarg_get_num(links);
for (n = 0; n < nlinks; n++) {
char *cur = strarg_get_str(links, n);
if (strncmp(cur, rdir, strlen(rdir)) == 0) {
/* Remove it, stripping the leading dir + /.
* Bomb for any error besides nonexistent file */
char *path = cur + strlen(rdir) + 1;
if (installrm_verbose) {
char *bdir = strrchr(rdir, '/') + 1;
fprintf(stderr, "Removing link %s in %s\n",
path, bdir);
}
if (remove(path) != 0) {
if (errno != ENOENT)
error(1, errno, "%s", path);
}
}
}
}
static void install_new_link(const initd_t *ip, const struct rcpair *rcp,
initd_sk_t sk, int *prio)
{
char target[PATH_MAX];
char path[PATH_MAX];
char *tname;
char skc;
initd_rc_t rc, match;
if (!ip || !rcp)
return;
/* Check if this service should be added to this level */
rc = rcp->rc;
match = (sk == SK_START) ? ip->dstart : ip->dstop;
if (!(match & rc))
return;
/* Set the current priority */
set_current_priority(sk, prio);
/* Set the name for the link [SK][0-9][0-9]name */
tname = ip->name;
skc = (sk == SK_START) ? 'S' : 'K';
snprintf(path, PATH_MAX, "%c%02d%s", skc, *prio, tname);
/* Construct the target */
snprintf(target, PATH_MAX, "../init.d/%s", tname);
/* Create the symlink */
if (installrm_verbose) {
char *bdir = strrchr(rcp->dir, '/') + 1;
fprintf(stderr, "Creating link %s -> %s in %s\n",
path, target, bdir);
}
if (symlink(target, path) < 0)
error(1, errno, "%s -> %s", path, target);
}
#define PRIOPATLEN 17
static void set_current_priority(initd_sk_t sk, int *prio)
{
char pat[PRIOPATLEN];
char skc;
glob_t globbuf;
/* We can only handle priorities from 0-99 */
if (sk == SK_START) {
if (*prio >= 99)
return;
} else {
if (*prio <= 0)
return;
}
do {
/* Setup a glob pattern ([SK][0-9][0-9][![:digit:]]*) */
skc = (sk == SK_START) ? 'S' : 'K';
snprintf(pat, PRIOPATLEN, "%c%02d[![:digit:]]*",
skc, *prio);
/* Try to glob it and break if none found */
glob(pat, 0, NULL, &globbuf);
if (!globbuf.gl_pathc)
break;
} while (((sk == SK_START) && (++(*prio) < 99)) ||
((sk == SK_STOP) && (--(*prio) > 0)));
}
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