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 <inttypes.h> 22 #include <stdlib.h> 23 #include <stdio.h> 24 #include <unistd.h> 25 26 #include <sys/types.h> 27 #include <sys/stat.h> 28 #include <fcntl.h> 29 #include <glob.h> 30 31 #include <libubox/ustream.h> 32 33 #include "procd.h" 34 #include "rcS.h" 35 36 static struct runqueue q, r; 37 38 struct initd { 39 struct ustream_fd fd; 40 struct runqueue_process proc; 41 struct timespec ts_start; 42 char *file; 43 char *param; 44 }; 45 46 static void pipe_cb(struct ustream *s, int bytes) 47 { 48 struct initd *initd = container_of(s, struct initd, fd.stream); 49 char *newline, *str; 50 int len; 51 52 do { 53 str = ustream_get_read_buf(s, NULL); 54 if (!str) 55 break; 56 newline = strchr(str, '\n'); 57 if (!newline) 58 break; 59 *newline = 0; 60 len = newline + 1 - str; 61 ULOG_NOTE("%s: %s", initd->file, str); 62 #ifdef SHOW_BOOT_ON_CONSOLE 63 fprintf(stderr, "%s: %s\n", initd->file, str); 64 #endif 65 ustream_consume(s, len); 66 } while (1); 67 } 68 69 static void q_initd_run(struct runqueue *q, struct runqueue_task *t) 70 { 71 struct initd *s = container_of(t, struct initd, proc.task); 72 int pipefd[2]; 73 pid_t pid; 74 75 clock_gettime(CLOCK_MONOTONIC_RAW, &s->ts_start); 76 DEBUG(2, "start %s %s \n", s->file, s->param); 77 if (pipe(pipefd) == -1) { 78 ERROR("Failed to create pipe: %m\n"); 79 return; 80 } 81 82 pid = fork(); 83 if (pid < 0) 84 return; 85 86 if (pid) { 87 close(pipefd[1]); 88 fcntl(pipefd[0], F_SETFD, FD_CLOEXEC); 89 s->fd.stream.string_data = true, 90 s->fd.stream.notify_read = pipe_cb, 91 runqueue_process_add(q, &s->proc, pid); 92 ustream_fd_init(&s->fd, pipefd[0]); 93 return; 94 } 95 close(pipefd[0]); 96 97 int devnull = open("/dev/null", O_RDONLY); 98 dup2(devnull, STDIN_FILENO); 99 dup2(pipefd[1], STDOUT_FILENO); 100 dup2(pipefd[1], STDERR_FILENO); 101 102 if (devnull > STDERR_FILENO) 103 close(devnull); 104 105 execlp(s->file, s->file, s->param, NULL); 106 exit(1); 107 } 108 109 static void q_initd_complete(struct runqueue *q, struct runqueue_task *p) 110 { 111 struct initd *s = container_of(p, struct initd, proc.task); 112 struct timespec ts_stop, ts_res; 113 114 clock_gettime(CLOCK_MONOTONIC_RAW, &ts_stop); 115 ts_res.tv_sec = ts_stop.tv_sec - s->ts_start.tv_sec; 116 ts_res.tv_nsec = ts_stop.tv_nsec - s->ts_start.tv_nsec; 117 if (ts_res.tv_nsec < 0) { 118 --ts_res.tv_sec; 119 ts_res.tv_nsec += 1000000000; 120 } 121 122 DEBUG(2, "stop %s %s - took %" PRId64 ".%09" PRId64 "s\n", s->file, s->param, (int64_t)ts_res.tv_sec, (int64_t)ts_res.tv_nsec); 123 ustream_free(&s->fd.stream); 124 close(s->fd.fd.fd); 125 free(s); 126 } 127 128 static bool find_runqueue_list_entry(struct list_head *list, char *file, char *param) 129 { 130 struct initd *s; 131 132 list_for_each_entry(s, list, proc.task.list.list) 133 if (!strcmp(s->file, file) && !strcmp(s->param, param)) 134 return true; 135 return false; 136 } 137 138 static void add_initd(struct runqueue *q, char *file, char *param) 139 { 140 static const struct runqueue_task_type initd_type = { 141 .run = q_initd_run, 142 .cancel = runqueue_process_cancel_cb, 143 .kill = runqueue_process_kill_cb, 144 }; 145 struct initd *s; 146 char *p, *f; 147 148 if (!strcmp(param, "running") && 149 (find_runqueue_list_entry(&q->tasks_active.list, file, param) || 150 find_runqueue_list_entry(&q->tasks_inactive.list, file, param))) 151 return; 152 153 s = calloc_a(sizeof(*s), &f, strlen(file) + 1, &p, strlen(param) + 1); 154 if (!s) { 155 ERROR("Out of memory in %s.\n", file); 156 return; 157 } 158 s->proc.task.type = &initd_type; 159 s->proc.task.complete = q_initd_complete; 160 if (!strcmp(param, "stop") || !strcmp(param, "shutdown")) { 161 s->proc.task.run_timeout = 15000; 162 s->proc.task.cancel_timeout = 10000; 163 } 164 s->param = p; 165 s->file = f; 166 strcpy(s->param, param); 167 strcpy(s->file, file); 168 runqueue_task_add(q, &s->proc.task, false); 169 } 170 171 static int _rc(struct runqueue *q, char *path, const char *file, char *pattern, char *param) 172 { 173 char *dir = alloca(2 + strlen(path) + strlen(file) + strlen(pattern)); 174 glob_t gl; 175 int j; 176 177 if (!dir) { 178 ERROR("Out of memory in %s.\n", file); 179 return -1; 180 } 181 182 DEBUG(2, "running %s/%s%s %s\n", path, file, pattern, param); 183 sprintf(dir, "%s/%s%s", path, file, pattern); 184 if (glob(dir, GLOB_NOESCAPE | GLOB_MARK, NULL, &gl)) { 185 DEBUG(2, "glob failed on %s\n", dir); 186 return -1; 187 } 188 189 for (j = 0; j < gl.gl_pathc; j++) 190 add_initd(q, gl.gl_pathv[j], param); 191 192 globfree(&gl); 193 194 return 0; 195 } 196 197 int rcS(char *pattern, char *param, void (*q_empty)(struct runqueue *)) 198 { 199 runqueue_init(&q); 200 q.empty_cb = q_empty; 201 q.max_running_tasks = 1; 202 203 return _rc(&q, "/etc/rc.d", pattern, "*", param); 204 } 205 206 int rc(const char *file, char *param) 207 { 208 return _rc(&r, "/etc/init.d", file, "", param); 209 } 210 211 static void r_empty(struct runqueue *q) 212 { 213 214 } 215 216 static void __attribute__((constructor)) rc_init() { 217 runqueue_init(&r); 218 r.empty_cb = r_empty; 219 r.max_running_tasks = 8; 220 } 221
This page was automatically generated by LXR 0.3.1. • OpenWrt