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cleanup: merge runsvc back into initd

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
This commit is contained in:
David Oberhollenzer 2020-04-06 18:27:48 +02:00
parent 0975ed0fb7
commit 5f28289731
5 changed files with 156 additions and 216 deletions

View file

@ -3,12 +3,6 @@ shutdown_CPPFLAGS = $(AM_CPPFLAGS)
shutdown_CFLAGS = $(AM_CFLAGS)
shutdown_LDFLAGS = $(AM_LDFLAGS)
runsvc_SOURCES = cmd/runsvc.c
runsvc_CPPFLAGS = $(AM_CPPFLAGS)
runsvc_CFLAGS = $(AM_CFLAGS)
runsvc_LDFLAGS = $(AM_LDFLAGS)
runsvc_LDADD = libinit.a libcfg.a
killall5_SOURCES = cmd/killall5.c
killall5_CPPFLAGS = $(AM_CPPFLAGS)
killall5_CFLAGS = $(AM_CFLAGS)
@ -37,4 +31,4 @@ dist_man8_MANS += cmd/shutdown.8 cmd/service/service.8
EXTRA_DIST += $(SRVHEADERS)
sbin_PROGRAMS += service shutdown
helper_PROGRAMS += killall5 runsvc waitfile
helper_PROGRAMS += killall5 waitfile

View file

@ -1,195 +0,0 @@
/* SPDX-License-Identifier: ISC */
#include <sys/types.h>
#include <sys/wait.h>
#include <stdbool.h>
#include <stddef.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include "service.h"
#include "libcfg.h"
#include "config.h"
#define ENVFILE ETCPATH "/initd.env"
#define PROCFDDIR "/proc/self/fd"
static int setup_env(void)
{
int status = -1;
ssize_t ret;
FILE *fp;
clearenv();
fp = fopen(ENVFILE, "r");
if (fp == NULL) {
perror(ENVFILE);
return -1;
}
do {
char *line = NULL;
size_t n = 0;
errno = 0;
ret = getline(&line, &n, fp);
if (ret < 0) {
if (errno == 0) {
status = 0;
} else {
perror(ENVFILE);
}
} else if (ret > 0 && putenv(line) != 0) {
perror("putenv");
ret = -1;
}
free(line);
} while (ret >= 0);
fclose(fp);
return status;
}
static int close_all_files(void)
{
struct dirent *ent;
DIR *dir;
int fd;
dir = opendir(PROCFDDIR);
if (dir == NULL) {
perror(PROCFDDIR);
return -1;
}
while ((ent = readdir(dir)) != NULL) {
if (!isdigit(ent->d_name[0]))
continue;
fd = atoi(ent->d_name);
close(fd);
}
closedir(dir);
return 0;
}
static int setup_tty(const char *tty, bool truncate)
{
int fd;
if (tty == NULL)
return 0;
fd = open(tty, O_RDWR);
if (fd < 0) {
perror(tty);
return -1;
}
if (truncate)
ftruncate(fd, 0);
setsid();
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
return 0;
}
static __attribute__((noreturn)) void argv_exec(exec_t *e)
{
char **argv = alloca(sizeof(char *) * (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 run_sequentially(exec_t *list)
{
pid_t ret, pid;
int status;
for (; list != NULL; list = list->next) {
if (list->next == NULL)
argv_exec(list);
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)
{
service_t *svc = NULL;
int dirfd;
if (argc != 3) {
fputs("usage: runsvc <directory> <filename>\n", stderr);
return EXIT_FAILURE;
}
if (getppid() != 1) {
fputs("must be run by init!\n", stderr);
return EXIT_FAILURE;
}
dirfd = open(argv[1], O_RDONLY | O_DIRECTORY);
if (dirfd < 0) {
perror(argv[1]);
return EXIT_FAILURE;
}
svc = rdsvc(dirfd, argv[2], RDSVC_NO_FNAME | RDSVC_NO_DEPS);
close(dirfd);
if (svc == NULL)
return EXIT_FAILURE;
if (setup_env())
return EXIT_FAILURE;
if (close_all_files())
return EXIT_FAILURE;
if (setup_tty(svc->ctty, (svc->flags & SVC_FLAG_TRUNCATE_OUT) != 0))
return EXIT_FAILURE;
return run_sequentially(svc->exec);
}

View file

@ -24,7 +24,8 @@
#include "service.h"
#include "config.h"
#define RUNSVCBIN SCRIPTDIR "/runsvc"
#define ENVFILE ETCPATH "/initd.env"
#define PROCFDDIR "/proc/self/fd"
enum {
STATUS_OK = 0,

View file

@ -3,23 +3,154 @@
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include "init.h"
static int setup_env(void)
{
int status = -1;
ssize_t ret;
FILE *fp;
clearenv();
fp = fopen(ENVFILE, "r");
if (fp == NULL) {
perror(ENVFILE);
return -1;
}
do {
char *line = NULL;
size_t n = 0;
errno = 0;
ret = getline(&line, &n, fp);
if (ret < 0) {
if (errno == 0) {
status = 0;
} else {
perror(ENVFILE);
}
} else if (ret > 0 && putenv(line) != 0) {
perror("putenv");
ret = -1;
}
free(line);
} while (ret >= 0);
fclose(fp);
return status;
}
static int close_all_files(void)
{
struct dirent *ent;
DIR *dir;
int fd;
dir = opendir(PROCFDDIR);
if (dir == NULL) {
perror(PROCFDDIR);
return -1;
}
while ((ent = readdir(dir)) != NULL) {
if (!isdigit(ent->d_name[0]))
continue;
fd = atoi(ent->d_name);
close(fd);
}
closedir(dir);
return 0;
}
static int setup_tty(const char *tty, bool truncate)
{
int fd;
if (tty == NULL)
return 0;
fd = open(tty, O_RDWR);
if (fd < 0) {
perror(tty);
return -1;
}
if (truncate)
ftruncate(fd, 0);
setsid();
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
return 0;
}
static __attribute__((noreturn)) void argv_exec(exec_t *e)
{
char **argv = alloca(sizeof(char *) * (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 run_sequentially(exec_t *list)
{
pid_t ret, pid;
int status;
for (; list != NULL; list = list->next) {
if (list->next == NULL)
argv_exec(list);
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;
}
pid_t runsvc(service_t *svc)
{
char *argv[4], *envp[1];
sigset_t mask;
pid_t pid;
argv[0] = (char *)RUNSVCBIN;
argv[1] = (char *)SVCDIR;
argv[2] = svc->fname;
argv[3] = NULL;
envp[0] = NULL;
pid = fork();
if (pid == -1)
@ -29,9 +160,18 @@ pid_t runsvc(service_t *svc)
sigemptyset(&mask);
sigprocmask(SIG_SETMASK, &mask, NULL);
execve(argv[0], argv, envp);
perror(argv[0]);
exit(EXIT_FAILURE);
if (setup_env())
exit(EXIT_FAILURE);
if (close_all_files())
exit(EXIT_FAILURE);
if (setup_tty(svc->ctty,
(svc->flags & SVC_FLAG_TRUNCATE_OUT) != 0)) {
exit(EXIT_FAILURE);
}
exit(run_sequentially(svc->exec));
}
return pid;

View file

@ -175,7 +175,7 @@ void supervisor_init(void)
{
int status = STATUS_OK;
if (svcscan(SVCDIR, &cfg, RDSVC_NO_EXEC | RDSVC_NO_CTTY))
if (svcscan(SVCDIR, &cfg, 0))
status = STATUS_FAIL;
target = TGT_BOOT;
@ -191,7 +191,7 @@ void supervisor_reload_config(void)
service_t *svc;
int i;
if (svcscan(SVCDIR, &newcfg, RDSVC_NO_EXEC | RDSVC_NO_CTTY))
if (svcscan(SVCDIR, &newcfg, 0))
return;
for (i = 0; i < TGT_MAX; ++i) {