Merge master

[netatalk.git] / libatalk / util / unix.c

diff --git a/libatalk/util/unix.c b/libatalk/util/unix.c
index 9e71fcb4b71a3b7fd53479c4cebc2cef7cb3bb30..d202b99a31f9d1dc165c7836b8b43d3d0fcd6f4c 100644 (file)
--- a/libatalk/util/unix.c
+++ b/libatalk/util/unix.c
@@ -40,6 +40,60 @@
 #include <atalk/vfs.h>
 #include <atalk/util.h>
 #include <atalk/unix.h>
+#include <atalk/compat.h>
+
+/* close all FDs >= a specified value */
+static void closeall(int fd)
+{
+    int fdlimit = sysconf(_SC_OPEN_MAX);
+
+    while (fd < fdlimit)
+        close(fd++);
+}
+
+/*!
+ * Daemonize
+ *
+ * Fork, exit parent, setsid(), optionally chdir("/"), optionally close all fds
+ *
+ * returns -1 on failure, but you can't do much except exit in that case
+ * since we may already have forked
+ */
+int daemonize(int nochdir, int noclose)
+{
+    switch (fork()) {
+    case 0:
+        break;
+    case -1:
+        return -1;
+    default:
+        _exit(0);
+    }
+
+    if (setsid() < 0)
+        return -1;
+
+    switch (fork()) {
+    case 0: 
+        break;
+    case -1:
+        return -1;
+    default:
+        _exit(0);
+    }
+
+    if (!nochdir)
+        chdir("/");
+
+    if (!noclose) {
+        closeall(0);
+        open("/dev/null",O_RDWR);
+        dup(0);
+        dup(0);
+    }
+
+    return 0;
+}
 
 /*!
  * @brief get cwd in static buffer
@@ -57,6 +111,31 @@ const char *getcwdpath(void)
         return strerror(errno);
 }
 
+/*!
+ * Make argument path absoulte
+ *
+ * @returns pointer to path or pointer to error messages on error
+ */
+const char *abspath(const char *name)
+{
+    static char buf[MAXPATHLEN + 1];
+    char *p;
+    int n;
+
+    if (name[0] == '/')
+        return name;
+
+    if ((p = getcwd(buf, MAXPATHLEN)) == NULL)
+        return strerror(errno);
+
+    n = strlen(buf);
+    if (buf[n-1] != '/')
+        buf[n++] = '/';
+        
+    strlcpy(buf + n, name, MAXPATHLEN - n);
+    return buf;
+}
+
 /*!
  * Takes a buffer with a path, strips slashs, returns basename
  *