mirror of
https://github.com/pygos/init.git
synced 2024-11-16 08:47:10 +01:00
056d3c8e64
This commit adds a "truncate" flag that can be added to a service description between the "tty" keyword and the path string. If the flag is set, the output file is truncated to 0 after opening. This probably requires some remodeling in the future as the tty keyword no longer deals with just tty devices. Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
141 lines
2.7 KiB
C
141 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
|
|
/*
|
|
* Copyright (C) 2018 - David Oberhollenzer
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "runsvc.h"
|
|
|
|
static int setup_tty(service_t *svc)
|
|
{
|
|
int fd;
|
|
|
|
if (svc->ctty != NULL) {
|
|
fd = open(svc->ctty, O_RDWR);
|
|
if (fd < 0) {
|
|
perror(svc->ctty);
|
|
return -1;
|
|
}
|
|
|
|
if (svc->flags & SVC_FLAG_TRUNCATE_OUT)
|
|
ftruncate(fd, 0);
|
|
|
|
close(STDIN_FILENO);
|
|
close(STDOUT_FILENO);
|
|
close(STDERR_FILENO);
|
|
|
|
setsid();
|
|
|
|
dup2(fd, STDIN_FILENO);
|
|
dup2(fd, STDOUT_FILENO);
|
|
dup2(fd, STDERR_FILENO);
|
|
close(fd);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static NORETURN void argv_exec(exec_t *e)
|
|
{
|
|
char **argv = alloca(e->argc + 1), *ptr;
|
|
int i;
|
|
|
|
for (ptr = e->args, i = 0; i < e->argc; ++i, ptr += strlen(ptr) + 1)
|
|
argv[i] = ptr;
|
|
|
|
argv[i] = NULL;
|
|
execvp(argv[0], argv);
|
|
perror(argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
static int runlst_wait(exec_t *list)
|
|
{
|
|
pid_t ret, pid;
|
|
int status;
|
|
|
|
for (; list != NULL; list = list->next) {
|
|
pid = fork();
|
|
|
|
if (pid == 0)
|
|
argv_exec(list);
|
|
|
|
if (pid == -1) {
|
|
perror("fork");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
do {
|
|
ret = waitpid(pid, &status, 0);
|
|
} while (ret != pid);
|
|
|
|
if (!WIFEXITED(status))
|
|
return EXIT_FAILURE;
|
|
|
|
if (WEXITSTATUS(status) != EXIT_SUCCESS)
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int dirfd, ret = EXIT_FAILURE;
|
|
service_t *svc = NULL;
|
|
|
|
if (argc != 3) {
|
|
fputs("usage: runsvc <directory> <filename>\n", stderr);
|
|
goto out;
|
|
}
|
|
|
|
if (getppid() != 1) {
|
|
fputs("must be run by init!\n", stderr);
|
|
goto out;
|
|
}
|
|
|
|
dirfd = open(argv[1], O_RDONLY | O_DIRECTORY);
|
|
if (dirfd < 0) {
|
|
perror(argv[1]);
|
|
goto out;
|
|
}
|
|
|
|
svc = rdsvc(dirfd, argv[2], RDSVC_NO_FNAME | RDSVC_NO_DEPS);
|
|
close(dirfd);
|
|
if (svc == NULL)
|
|
goto out;
|
|
|
|
if (svc->exec == NULL) {
|
|
ret = EXIT_SUCCESS;
|
|
goto out;
|
|
}
|
|
|
|
if (initenv())
|
|
goto out;
|
|
|
|
if (setup_tty(svc))
|
|
goto out;
|
|
|
|
if (svc->exec->next == NULL)
|
|
argv_exec(svc->exec);
|
|
|
|
ret = runlst_wait(svc->exec);
|
|
out:
|
|
delsvc(svc);
|
|
return ret;
|
|
}
|