1
0
Fork 0
mirror of https://github.com/pygos/init.git synced 2024-11-05 04:07:10 +01:00

Add functions to transmit service status accross initd socket

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
This commit is contained in:
David Oberhollenzer 2019-03-18 14:00:20 +01:00
parent 08f72865b2
commit 23b713c3b5
4 changed files with 175 additions and 0 deletions

View file

@ -3,6 +3,8 @@ libinit_a_SOURCES += lib/init/svcscan.c lib/init/del_svc_list.c
libinit_a_SOURCES += lib/init/svc_tsort.c lib/include/service.h
libinit_a_SOURCES += lib/init/init_socket_open.c lib/init/init_socket_create.c
libinit_a_SOURCES += lib/include/initsock.h lib/init/init_socket_send_request.c
libinit_a_SOURCES += lib/init/init_socket_send_status.c
libinit_a_SOURCES += lib/init/init_socket_recv_status.c
libinit_a_CPPFLAGS = $(AM_CPPFLAGS)
libinit_a_CFLAGS = $(AM_CFLAGS)

View file

@ -3,6 +3,7 @@
#define INITSOCK_H
#include "config.h"
#include "service.h"
#define INIT_SOCK_PATH SOCKDIR "/init.sock"
@ -10,14 +11,33 @@ typedef enum {
EIR_STATUS = 0x00,
} E_INIT_REQUEST;
typedef enum {
ESS_NONE = 0x00,
ESS_RUNNING = 0x01,
ESS_ENQUEUED = 0x02,
ESS_EXITED = 0x03,
} E_SERVICE_STATE;
typedef struct {
E_INIT_REQUEST rq;
} init_request_t;
typedef struct {
E_SERVICE_STATE state;
int exit_status;
char *filename;
char *service_name;
} init_status_response_t;
int init_socket_create(void);
int init_socket_open(const char *tmppath);
int init_socket_send_request(int fd, E_INIT_REQUEST rq);
int init_socket_send_status(int fd, const void *dest_addr, size_t addrlen,
E_SERVICE_STATE state, service_t *svc);
int init_socket_recv_status(int fd, init_status_response_t *resp);
#endif /* INITSOCK_H */

View file

@ -0,0 +1,88 @@
/* SPDX-License-Identifier: ISC */
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "initsock.h"
static int read_retry(int fd, void *buffer, size_t size)
{
ssize_t ret;
retry:
ret = read(fd, buffer, size);
if (ret < 0) {
if (errno == EINTR)
goto retry;
return -1;
}
if ((size_t)ret < size) {
errno = EPROTO;
return 0;
}
return 1;
}
static char *read_string(int fd)
{
uint8_t size_raw[2];
char *buffer;
size_t len;
int ret;
ret = read_retry(fd, size_raw, 2);
if (ret <= 0)
return NULL;
len = (((size_t)size_raw[0]) << 8) | (size_t)size_raw[1];
buffer = malloc(len + 1);
if (buffer == NULL)
return NULL;
if (len > 0) {
ret = read_retry(fd, buffer, len);
if (ret <= 0) {
ret = errno;
free(buffer);
errno = ret;
return NULL;
}
}
buffer[len] = '\0';
return buffer;
}
int init_socket_recv_status(int fd, init_status_response_t *resp)
{
uint8_t info[2];
memset(resp, 0, sizeof(*resp));
if (read_retry(fd, info, 2) <= 0)
return -1;
resp->state = info[0];
resp->exit_status = info[1];
if (resp->state == ESS_NONE)
return 0;
resp->filename = read_string(fd);
if (resp->filename == NULL)
return -1;
resp->service_name = read_string(fd);
if (resp->service_name == NULL)
return -1;
return 0;
}

View file

@ -0,0 +1,65 @@
/* SPDX-License-Identifier: ISC */
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "initsock.h"
static int send_retry(int fd, const void *dst, size_t addrlen,
const void *buffer, size_t size)
{
ssize_t ret;
retry:
ret = sendto(fd, buffer, size, MSG_NOSIGNAL, dst, addrlen);
if (ret < 0 && errno == EINTR)
goto retry;
if (ret < 0 || (size_t)ret < size)
return -1;
return 0;
}
static int send_string(int fd, const void *dst, size_t addrlen,
const char *str)
{
size_t len = strlen(str);
uint8_t raw_len[2];
raw_len[0] = (len >> 8) & 0xFF;
raw_len[1] = len & 0xFF;
if (send_retry(fd, dst, addrlen, raw_len, 2))
return -1;
return len > 0 ? send_retry(fd, dst, addrlen, str, len) : 0;
}
int init_socket_send_status(int fd, const void *dest_addr, size_t addrlen,
E_SERVICE_STATE state, service_t *svc)
{
uint8_t info[2];
if (svc == NULL || state == ESS_NONE) {
info[0] = ESS_NONE;
info[1] = 0;
} else {
info[0] = state;
info[1] = svc->status & 0xFF;
}
if (send_retry(fd, dest_addr, addrlen, info, 2))
return -1;
if (svc != NULL && state != ESS_NONE) {
if (send_string(fd, dest_addr, addrlen, svc->fname))
return -1;
if (send_string(fd, dest_addr, addrlen, svc->name))
return -1;
}
return 0;
}