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/*
* runqueue-example.c
*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <libubox/uloop.h>
#include <libubox/runqueue.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <glob.h>
#include <libubox/ustream.h>
#include "procd.h"
#include "rcS.h"
static struct runqueue q, r;
struct initd {
struct ustream_fd fd;
struct runqueue_process proc;
char *file;
char *param;
};
static void pipe_cb(struct ustream *s, int bytes)
{
struct ustream_buf *buf = s->r.head;
char *newline, *str;
int len;
do {
str = ustream_get_read_buf(s, NULL);
if (!str)
break;
newline = strchr(buf->data, '\n');
if (!newline)
break;
*newline = 0;
len = newline + 1 - str;
syslog(0, buf->data);
ustream_consume(s, len);
} while (1);
}
static void q_initd_run(struct runqueue *q, struct runqueue_task *t)
{
struct initd *s = container_of(t, struct initd, proc.task);
int pipefd[2];
pid_t pid;
DEBUG(2, "start %s %s \n", s->file, s->param);
if (pipe(pipefd) == -1) {
ERROR("Failed to create pipe\n");
return;
}
pid = fork();
if (pid < 0)
return;
if (pid) {
close(pipefd[1]);
s->fd.stream.string_data = true,
s->fd.stream.notify_read = pipe_cb,
runqueue_process_add(q, &s->proc, pid);
ustream_fd_init(&s->fd, pipefd[0]);
return;
}
close(pipefd[0]);
dup2(pipefd[1], STDOUT_FILENO);
dup2(pipefd[1], STDERR_FILENO);
execlp(s->file, s->file, s->param, NULL);
exit(1);
}
static void q_initd_complete(struct runqueue *q, struct runqueue_task *p)
{
struct initd *s = container_of(p, struct initd, proc.task);
DEBUG(2, "stop %s %s \n", s->file, s->param);
ustream_free(&s->fd.stream);
close(s->fd.fd.fd);
free(s);
}
static void add_initd(struct runqueue *q, char *file, char *param)
{
static const struct runqueue_task_type initd_type = {
.run = q_initd_run,
.cancel = runqueue_process_cancel_cb,
.kill = runqueue_process_kill_cb,
};
struct initd *s;
char *p, *f;
s = calloc_a(sizeof(*s), &f, strlen(file) + 1, &p, strlen(param) + 1);
s->proc.task.type = &initd_type;
s->proc.task.complete = q_initd_complete;
s->param = p;
s->file = f;
strcpy(s->param, param);
strcpy(s->file, file);
runqueue_task_add(q, &s->proc.task, false);
}
static int _rc(struct runqueue *q, char *path, const char *file, char *pattern, char *param)
{
char *dir = alloca(2 + strlen(path) + strlen(file) + strlen(pattern));
glob_t gl;
int j;
DEBUG(2, "running %s/%s%s %s\n", path, file, pattern, param);
sprintf(dir, "%s/%s%s", path, file, pattern);
if (glob(dir, GLOB_NOESCAPE | GLOB_MARK, NULL, &gl)) {
DEBUG(2, "glob failed on %s\n", dir);
return -1;
}
for (j = 0; j < gl.gl_pathc; j++)
add_initd(q, gl.gl_pathv[j], param);
globfree(&gl);
return 0;
}
int rcS(char *pattern, char *param, void (*q_empty)(struct runqueue *))
{
runqueue_init(&q);
q.empty_cb = q_empty;
q.max_running_tasks = 1;
return _rc(&q, "/etc/rc.d", pattern, "*", param);
}
int rc(const char *file, char *param)
{
return _rc(&r, "/etc/init.d", file, "", param);
}
static void r_empty(struct runqueue *q)
{
}
static void __attribute__((constructor)) rc_init() {
runqueue_init(&r);
r.empty_cb = r_empty;
r.max_running_tasks = 8;
}
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