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-rw-r--r--inittab.c336
1 files changed, 0 insertions, 336 deletions
diff --git a/inittab.c b/inittab.c
deleted file mode 100644
index 4675aca..0000000
--- a/inittab.c
+++ /dev/null
@@ -1,336 +0,0 @@
-/*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- * Copyright (C) 2015 Matthias Schiffer <mschiffer@universe-factory.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <regex.h>
-#include <ctype.h>
-
-#include <libubox/utils.h>
-#include <libubox/list.h>
-
-#include "utils/utils.h"
-#include "procd.h"
-#include "rcS.h"
-
-#define TAG_ID 0
-#define TAG_RUNLVL 1
-#define TAG_ACTION 2
-#define TAG_PROCESS 3
-
-#define MAX_ARGS 8
-
-struct init_action;
-char *console = NULL;
-
-struct init_handler {
- const char *name;
- void (*cb) (struct init_action *a);
- int multi;
-};
-
-struct init_action {
- struct list_head list;
-
- char *id;
- char *argv[MAX_ARGS];
- char *line;
-
- struct init_handler *handler;
- struct uloop_process proc;
-
- int respawn;
- struct uloop_timeout tout;
-};
-
-static const char *tab = "/etc/inittab";
-static char *ask = "/sbin/askfirst";
-
-static LIST_HEAD(actions);
-
-static int dev_open(const char *dev)
-{
- int fd = -1;
-
- if (dev) {
- if (chdir("/dev"))
- ERROR("failed to change dir to /dev\n");
- fd = open(dev, O_RDWR);
- if (chdir("/"))
- ERROR("failed to change dir to /\n");
- }
-
- return fd;
-}
-
-static int dev_exist(const char *dev)
-{
- int res;
-
- res = dev_open(dev);
- if (res != -1)
- close(res);
-
- return (res != -1);
-}
-
-static void fork_worker(struct init_action *a)
-{
- int fd;
- pid_t p;
-
- a->proc.pid = fork();
- if (!a->proc.pid) {
- p = setsid();
-
- fd = dev_open(a->id);
- if (fd != -1)
- {
- dup2(fd, STDIN_FILENO);
- dup2(fd, STDOUT_FILENO);
- dup2(fd, STDERR_FILENO);
- if (fd > STDERR_FILENO)
- close(fd);
- }
-
- ioctl(STDIN_FILENO, TIOCSCTTY, 1);
- tcsetpgrp(STDIN_FILENO, p);
-
- execvp(a->argv[0], a->argv);
- ERROR("Failed to execute %s\n", a->argv[0]);
- exit(-1);
- }
-
- if (a->proc.pid > 0) {
- DEBUG(4, "Launched new %s action, pid=%d\n",
- a->handler->name,
- (int) a->proc.pid);
- uloop_process_add(&a->proc);
- }
-}
-
-static void child_exit(struct uloop_process *proc, int ret)
-{
- struct init_action *a = container_of(proc, struct init_action, proc);
-
- DEBUG(4, "pid:%d\n", proc->pid);
- uloop_timeout_set(&a->tout, a->respawn);
-}
-
-static void respawn(struct uloop_timeout *tout)
-{
- struct init_action *a = container_of(tout, struct init_action, tout);
- fork_worker(a);
-}
-
-static void rcdone(struct runqueue *q)
-{
- procd_state_next();
-}
-
-static void runrc(struct init_action *a)
-{
- if (!a->argv[1] || !a->argv[2]) {
- ERROR("valid format is rcS <S|K> <param>\n");
- return;
- }
-
- /* proceed even if no init or shutdown scripts run */
- if (rcS(a->argv[1], a->argv[2], rcdone))
- rcdone(NULL);
-}
-
-static void askfirst(struct init_action *a)
-{
- int i;
-
- if (!dev_exist(a->id) || (console && !strcmp(console, a->id))) {
- DEBUG(4, "Skipping %s\n", a->id);
- return;
- }
-
- a->tout.cb = respawn;
- for (i = MAX_ARGS - 1; i >= 1; i--)
- a->argv[i] = a->argv[i - 1];
- a->argv[0] = ask;
- a->respawn = 500;
-
- a->proc.cb = child_exit;
- fork_worker(a);
-}
-
-static void askconsole(struct init_action *a)
-{
- char line[256], *tty, *split;
- int i;
-
- tty = get_cmdline_val("console", line, sizeof(line));
- if (tty != NULL) {
- split = strchr(tty, ',');
- if (split != NULL)
- *split = '\0';
-
- if (!dev_exist(tty)) {
- DEBUG(4, "skipping %s\n", tty);
- return;
- }
-
- console = strdup(tty);
- a->id = strdup(tty);
- }
- else {
- console = NULL;
- a->id = NULL;
- }
-
- a->tout.cb = respawn;
- for (i = MAX_ARGS - 1; i >= 1; i--)
- a->argv[i] = a->argv[i - 1];
- a->argv[0] = ask;
- a->respawn = 500;
-
- a->proc.cb = child_exit;
- fork_worker(a);
-}
-
-static void rcrespawn(struct init_action *a)
-{
- a->tout.cb = respawn;
- a->respawn = 500;
-
- a->proc.cb = child_exit;
- fork_worker(a);
-}
-
-static struct init_handler handlers[] = {
- {
- .name = "sysinit",
- .cb = runrc,
- }, {
- .name = "shutdown",
- .cb = runrc,
- }, {
- .name = "askfirst",
- .cb = askfirst,
- .multi = 1,
- }, {
- .name = "askconsole",
- .cb = askconsole,
- .multi = 1,
- }, {
- .name = "respawn",
- .cb = rcrespawn,
- .multi = 1,
- }
-};
-
-static int add_action(struct init_action *a, const char *name)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(handlers); i++)
- if (!strcmp(handlers[i].name, name)) {
- a->handler = &handlers[i];
- list_add_tail(&a->list, &actions);
- return 0;
- }
- ERROR("Unknown init handler %s\n", name);
- return -1;
-}
-
-void procd_inittab_run(const char *handler)
-{
- struct init_action *a;
-
- list_for_each_entry(a, &actions, list)
- if (!strcmp(a->handler->name, handler)) {
- if (a->handler->multi) {
- a->handler->cb(a);
- continue;
- }
- a->handler->cb(a);
- break;
- }
-}
-
-void procd_inittab(void)
-{
-#define LINE_LEN 128
- FILE *fp = fopen(tab, "r");
- struct init_action *a;
- regex_t pat_inittab;
- regmatch_t matches[5];
- char *line;
-
- if (!fp) {
- ERROR("Failed to open %s\n", tab);
- return;
- }
-
- regcomp(&pat_inittab, "([a-zA-Z0-9]*):([a-zA-Z0-9]*):([a-zA-Z0-9]*):(.*)", REG_EXTENDED);
- line = malloc(LINE_LEN);
- a = malloc(sizeof(struct init_action));
- memset(a, 0, sizeof(struct init_action));
-
- while (fgets(line, LINE_LEN, fp)) {
- char *tags[TAG_PROCESS + 1];
- char *tok;
- int i;
- int len = strlen(line);
-
- while (isspace(line[len - 1]))
- len--;
- line[len] = 0;
-
- if (*line == '#')
- continue;
-
- if (regexec(&pat_inittab, line, 5, matches, 0))
- continue;
-
- DEBUG(4, "Parsing inittab - %s", line);
-
- for (i = TAG_ID; i <= TAG_PROCESS; i++) {
- line[matches[i].rm_eo] = '\0';
- tags[i] = &line[matches[i + 1].rm_so];
- };
-
- tok = strtok(tags[TAG_PROCESS], " ");
- for (i = 0; i < (MAX_ARGS - 1) && tok; i++) {
- a->argv[i] = tok;
- tok = strtok(NULL, " ");
- }
- a->argv[i] = NULL;
- a->id = tags[TAG_ID];
- a->line = line;
-
- if (add_action(a, tags[TAG_ACTION]))
- continue;
- line = malloc(LINE_LEN);
- a = malloc(sizeof(struct init_action));
- memset(a, 0, sizeof(struct init_action));
- }
-
- fclose(fp);
- free(line);
- free(a);
- regfree(&pat_inittab);
-}