jail: Add MS_NODEV MS_NOEXEC MS_NOSUID mount options where needed
[project/procd.git] / rcS.c
1 /*
2 * runqueue-example.c
3 *
4 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <libubox/uloop.h>
20 #include <libubox/runqueue.h>
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <unistd.h>
24
25 #include <sys/types.h>
26 #include <sys/stat.h>
27 #include <glob.h>
28
29 #include <libubox/ustream.h>
30
31 #include "procd.h"
32 #include "rcS.h"
33
34 static struct runqueue q, r;
35
36 struct initd {
37 struct ustream_fd fd;
38 struct runqueue_process proc;
39 char *file;
40 char *param;
41 };
42
43 static void pipe_cb(struct ustream *s, int bytes)
44 {
45 char *newline, *str;
46 int len;
47
48 do {
49 str = ustream_get_read_buf(s, NULL);
50 if (!str)
51 break;
52 newline = strchr(str, '\n');
53 if (!newline)
54 break;
55 *newline = 0;
56 len = newline + 1 - str;
57 syslog(0, "%s", str);
58 #ifdef SHOW_BOOT_ON_CONSOLE
59 fprintf(stderr, "%s\n", str);
60 #endif
61 ustream_consume(s, len);
62 } while (1);
63 }
64
65 static void q_initd_run(struct runqueue *q, struct runqueue_task *t)
66 {
67 struct initd *s = container_of(t, struct initd, proc.task);
68 int pipefd[2];
69 pid_t pid;
70
71 DEBUG(2, "start %s %s \n", s->file, s->param);
72 if (pipe(pipefd) == -1) {
73 ERROR("Failed to create pipe\n");
74 return;
75 }
76
77 pid = fork();
78 if (pid < 0)
79 return;
80
81 if (pid) {
82 close(pipefd[1]);
83 s->fd.stream.string_data = true,
84 s->fd.stream.notify_read = pipe_cb,
85 runqueue_process_add(q, &s->proc, pid);
86 ustream_fd_init(&s->fd, pipefd[0]);
87 return;
88 }
89 close(pipefd[0]);
90 dup2(pipefd[1], STDOUT_FILENO);
91 dup2(pipefd[1], STDERR_FILENO);
92
93 execlp(s->file, s->file, s->param, NULL);
94 exit(1);
95 }
96
97 static void q_initd_complete(struct runqueue *q, struct runqueue_task *p)
98 {
99 struct initd *s = container_of(p, struct initd, proc.task);
100
101 DEBUG(2, "stop %s %s \n", s->file, s->param);
102 ustream_free(&s->fd.stream);
103 close(s->fd.fd.fd);
104 free(s);
105 }
106
107 static void add_initd(struct runqueue *q, char *file, char *param)
108 {
109 static const struct runqueue_task_type initd_type = {
110 .run = q_initd_run,
111 .cancel = runqueue_process_cancel_cb,
112 .kill = runqueue_process_kill_cb,
113 };
114 struct initd *s;
115 char *p, *f;
116
117 s = calloc_a(sizeof(*s), &f, strlen(file) + 1, &p, strlen(param) + 1);
118 if (!s) {
119 ERROR("Out of memory in %s.\n", file);
120 return;
121 }
122 s->proc.task.type = &initd_type;
123 s->proc.task.complete = q_initd_complete;
124 if (!strcmp(param, "stop") || !strcmp(param, "shutdown"))
125 s->proc.task.run_timeout = 15000;
126 s->param = p;
127 s->file = f;
128 strcpy(s->param, param);
129 strcpy(s->file, file);
130 runqueue_task_add(q, &s->proc.task, false);
131 }
132
133 static int _rc(struct runqueue *q, char *path, const char *file, char *pattern, char *param)
134 {
135 char *dir = alloca(2 + strlen(path) + strlen(file) + strlen(pattern));
136 glob_t gl;
137 int j;
138
139 if (!dir) {
140 ERROR("Out of memory in %s.\n", file);
141 return -1;
142 }
143
144 DEBUG(2, "running %s/%s%s %s\n", path, file, pattern, param);
145 sprintf(dir, "%s/%s%s", path, file, pattern);
146 if (glob(dir, GLOB_NOESCAPE | GLOB_MARK, NULL, &gl)) {
147 DEBUG(2, "glob failed on %s\n", dir);
148 return -1;
149 }
150
151 for (j = 0; j < gl.gl_pathc; j++)
152 add_initd(q, gl.gl_pathv[j], param);
153
154 globfree(&gl);
155
156 return 0;
157 }
158
159 int rcS(char *pattern, char *param, void (*q_empty)(struct runqueue *))
160 {
161 runqueue_init(&q);
162 q.empty_cb = q_empty;
163 q.max_running_tasks = 1;
164
165 return _rc(&q, "/etc/rc.d", pattern, "*", param);
166 }
167
168 int rc(const char *file, char *param)
169 {
170 return _rc(&r, "/etc/init.d", file, "", param);
171 }
172
173 static void r_empty(struct runqueue *q)
174 {
175
176 }
177
178 static void __attribute__((constructor)) rc_init() {
179 runqueue_init(&r);
180 r.empty_cb = r_empty;
181 r.max_running_tasks = 8;
182 }