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fixed IPC rules

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This commit is contained in:
Edward Emelianov
2026-03-26 23:00:30 +03:00
parent c74d1e6026
commit df4a597aa8
2 changed files with 9 additions and 60 deletions
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67
Daemons/weather_proxy/weather_daemon.c
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@@ -10,6 +10,7 @@
#include <arpa/inet.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <semaphore.h>
#include <signal.h>
@@ -29,22 +30,6 @@ static sem_t *sem = NULL;
static weather_data_t *shared_data = NULL;
static volatile int running = 1;
#if 0
static void log_message(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_DAEMON | LOG_INFO, fmt, ap);
va_end(ap);
}
static void log_error(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsyslog(LOG_DAEMON | LOG_ERR, fmt, ap);
va_end(ap);
}
#endif
#define log_message(...) do{printf("message: "); printf(__VA_ARGS__); printf("\n");}while(0)
#define log_error(...) do{printf("error: "); printf(__VA_ARGS__); printf("\n");}while(0)
@@ -56,11 +41,12 @@ static void signal_handler(int sig) {
}
static int init_ipc(void) {
shm_fd = shm_open(SHM_NAME, O_RDWR, 0600); // try to open existant SHM
umask(0); // for read-write semaphore
shm_fd = shm_open(SHM_NAME, O_RDWR, 0644); // try to open existant SHM
if (shm_fd == -1) {
printf("Create new shared memory\n");
// no - create new
shm_fd = shm_open(SHM_NAME, O_CREAT | O_RDWR, 0600);
shm_fd = shm_open(SHM_NAME, O_CREAT | O_RDWR, 0644);
if (shm_fd == -1) {
log_error("shm_open (create) failed: %s", strerror(errno));
return -1;
@@ -90,7 +76,7 @@ static int init_ipc(void) {
memset(shared_data, 0, sizeof(weather_data_t));
// create samaphore if no
sem = sem_open(SEM_NAME, O_CREAT, 0600, 1);
sem = sem_open(SEM_NAME, O_CREAT, 0666, 1);
if (sem == SEM_FAILED) {
log_error("sem_open failed: %s", strerror(errno));
return -1;
@@ -102,13 +88,16 @@ static int init_ipc(void) {
static void cleanup_ipc(void) {
if (sem != NULL) {
sem_close(sem);
printf("semaphore closed\n");
if(-1 == sem_unlink(SEM_NAME)) perror("Can't delete semaphore");
}
if (shared_data != NULL) {
printf("memory unmapped\n");
munmap(shared_data, sizeof(weather_data_t));
}
if (shm_fd != -1) {
close(shm_fd);
printf("close shared mem\n");
if (shm_unlink(SHM_NAME) == -1) {
perror("can't unlink SHM");
}
@@ -257,46 +246,6 @@ static void run_daemon(const char *server_ip, int port) {
close(sock);
}
#if 0
static void daemonize(void) {
pid_t pid = fork();
if (pid < 0) {
perror("fork");
exit(EXIT_FAILURE);
}
if (pid > 0) exit(EXIT_SUCCESS);
if (setsid() < 0) {
perror("setsid");
exit(EXIT_FAILURE);
}
signal(SIGHUP, SIG_IGN);
pid = fork();
if (pid < 0) {
perror("second fork");
exit(EXIT_FAILURE);
}
if (pid > 0) exit(EXIT_SUCCESS);
if (chdir("/") < 0) {
perror("chdir");
exit(EXIT_FAILURE);
}
umask(0);
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
open("/dev/null", O_RDWR);
dup(0);
dup(0);
}
#endif
int main(int argc, char *argv[]) {
if (argc != 3) {
fprintf(stderr, "Usage: %s <server_ip> <port>\n", argv[0]);