(FSCORE-189) Improve daemonize code

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9577 d0543943-73ff-0310-b7d9-9358b9ac24b2

diff --git a/src/switch.c b/src/switch.c
index f5adc2e3af0534b1689298db18a722da9d04cf9e..19f454195db6e6254af9ddc27b372f08130ad39f 100644 (file)
--- a/src/switch.c
+++ b/src/switch.c
@@ -194,6 +194,58 @@ void WINAPI service_main(DWORD numArgs, char **args)
        SetServiceStatus(hStatus, &status);
 }
 
+#else
+
+void daemonize(void) {
+       int fd;
+       pid_t pid;
+
+       switch (fork()) {
+               case 0:
+                       break;
+               case -1:
+                       fprintf(stderr, "Error Backgrounding (fork)! %d - %s\n", errno, strerror(errno));
+                       exit(0);
+                       break;
+               default:
+                       exit(0);
+       }
+
+       if (setsid() < 0) {
+               fprintf(stderr, "Error Backgrounding (setsid)! %d - %s\n", errno, strerror(errno));
+               exit(0);
+       }
+       pid = fork();
+       switch (pid) {
+               case 0:
+                       break;
+               case -1:
+                       fprintf(stderr, "Error Backgrounding (fork2)! %d - %s\n", errno, strerror(errno));
+                       exit(0);
+                       break;
+               default:
+                       fprintf(stderr, "%d Backgrounding.\n", (int) pid);
+                       exit(0);
+       }
+
+       /* redirect std* to null */
+       fd = open("/dev/null", O_RDONLY);
+       if (fd != 0) {
+               dup2(fd, 0);
+               close(fd);
+       }
+       fd = open("/dev/null", O_WRONLY);
+       if (fd != 1) {
+               dup2(fd, 1);
+               close(fd);
+       }
+       fd = open("/dev/null", O_WRONLY);
+       if (fd != 2) {
+               dup2(fd, 2);
+               close(fd);
+       }
+}
+
 #endif
 
 /* the main application entry point */
@@ -501,9 +553,8 @@ int main(int argc, char *argv[])
 #ifdef WIN32
                FreeConsole();
 #else
-               if (!nf && (pid = fork())) {
-                       fprintf(stderr, "%d Backgrounding.\n", (int) pid);
-                       exit(0);
+               if (!nf) {
+                       daemonize();
                }
 #endif
        }
@@ -530,12 +581,12 @@ int main(int argc, char *argv[])
        memset(pid_buffer, 0, sizeof(pid_buffer));
        switch_snprintf(pid_path, sizeof(pid_path), "%s%s%s", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR, pfile);
        switch_snprintf(pid_buffer, sizeof(pid_buffer), "%d", pid);
-       pid_len = sizeof(pid_buffer);
+       pid_len = strlen(pid_buffer);
 
        apr_pool_create(&pool, NULL);
        if (switch_file_open(&fd,
                pid_path,
-               SWITCH_FOPEN_WRITE | SWITCH_FOPEN_CREATE,
+               SWITCH_FOPEN_WRITE | SWITCH_FOPEN_CREATE | SWITCH_FOPEN_TRUNCATE,
                SWITCH_FPROT_UREAD | SWITCH_FPROT_UWRITE,
                pool) != SWITCH_STATUS_SUCCESS) {
                        fprintf(stderr, "Cannot open pid file %s.\n", pid_path);