Add new APIs

[apps/pfixtools.git] / common.c

diff --git a/common.c b/common.c
index 80746ae..3addd0e 100644 (file)
--- a/common.c
+++ b/common.c
@@ -40,8 +40,10 @@
 
 #include "common.h"
 
-sig_atomic_t sigint    = false;
-sig_atomic_t sighup    = false;
+sig_atomic_t sigint  = false;
+sig_atomic_t sighup  = false;
+
+static FILE *pidfile = NULL;
 
 void common_sighandler(int sig)
 {
@@ -86,7 +88,7 @@ static int setnonblock(int sock)
     return 0;
 }
 
-int tcp_listen_nonblock(const struct sockaddr *addr, socklen_t len)
+int tcp_bind(const struct sockaddr *addr, socklen_t len)
 {
     int sock;
 
@@ -126,17 +128,32 @@ int tcp_listen_nonblock(const struct sockaddr *addr, socklen_t len)
         return -1;
     }
 
-    if (setnonblock(sock)) {
+    return sock;
+}
+
+int tcp_listen(const struct sockaddr *addr, socklen_t len)
+{
+    int sock = tcp_bind(addr, len);
+    if (listen(sock, 0) < 0) {
+        UNIXERR("bind");
         close(sock);
         return -1;
     }
+    return sock;
+}
 
+int tcp_listen_nonblock(const struct sockaddr *addr, socklen_t len)
+{
+    int sock = tcp_bind(addr, len);
+    if (setnonblock(sock)) {
+        close(sock);
+        return -1;
+    }
     if (listen(sock, 0) < 0) {
         UNIXERR("bind");
         close(sock);
         return -1;
     }
-
     return sock;
 }
 
@@ -157,6 +174,20 @@ int accept_nonblock(int fd)
     return sock;
 }
 
+int xwrite(int fd, const char *s, size_t l)
+{
+    while (l > 0) {
+        int nb = write(fd, s, l);
+        if (nb < 0) {
+            if (errno == EINTR || errno == EAGAIN)
+                continue;
+            return -1;
+        }
+        l -= nb;
+    }
+    return 0;
+}
+
 int daemon_detach(void)
 {
     pid_t pid;
@@ -204,9 +235,52 @@ int drop_privileges(const char *user, const char *group)
     return 0;
 }
 
+int pidfile_open(const char *name)
+{
+    if (name) {
+        pidfile = fopen(name, "w");
+        if (!pidfile)
+            return -1;
+        fprintf(pidfile, "%d\n", getpid());
+        return fflush(pidfile);
+    }
+    return 0;
+}
+
+int pidfile_refresh(void)
+{
+    if (pidfile) {
+        rewind(pidfile);
+        ftruncate(fileno(pidfile), 0);
+        fprintf(pidfile, "%d\n", getpid());
+        return fflush(pidfile);
+    }
+    return 0;
+}
+
+static void pidfile_close(void)
+{
+    if (pidfile) {
+        rewind(pidfile);
+        ftruncate(fileno(pidfile), 0);
+        fclose(pidfile);
+        pidfile = NULL;
+    }
+}
+
 extern initcall_t __madinit[], __madexit[];
 
-void common_initialize(void)
+static void common_shutdown(void)
+{
+    pidfile_close();
+
+    for (int i = -1; __madexit[i]; i--) {
+        (*__madexit[i])();
+    }
+}
+
+static void __attribute__((__constructor__,__used__))
+common_initialize(void)
 {
     if (atexit(common_shutdown)) {
         fputs("Cannot hook my atexit function, quitting !\n", stderr);
@@ -220,9 +294,3 @@ void common_initialize(void)
     }
 }
 
-void common_shutdown(void)
-{
-    for (int i = -1; __madexit[i]; i--) {
-        (*__madexit[i])();
-    }
-}