chdir() to where the binary is running from before doing anything else.

This is so we can find our script files, etc, regardless of where the program is run from. Note that this means your 1Password symlink needs to live where the binary does, at least until we let you specify one elsewhere.
icculus · Jul 9, 2014 · c45bd4a · c45bd4a
1 parent e9c40c4
commit c45bd4a
Showing 1 changed file with 54 additions and 0 deletions.
diff --git a/1pass.c b/1pass.c
@@ -623,8 +623,62 @@ static void initSignals(void)
 } // initSignals
 
 
+// this was from PhysicsFS ( https://icculus.org/physfs/ ), zlib license.
+static char *readSymLink(const char *path)
+{
+    ssize_t len = 64;
+    ssize_t rc = -1;
+    char *retval = NULL;
+
+    while (1)
+    {
+         char *ptr = (char *) realloc(retval, (size_t) len);
+         if (ptr == NULL)
+             break;   // out of memory.
+         retval = ptr;
+
+         rc = readlink(path, retval, len);
+         if (rc == -1)
+             break;  // not a symlink, i/o error, etc.
+
+         else if (rc < len)
+         {
+             retval[rc] = '\0';  // readlink doesn't null-terminate.
+             return retval;  // we're good to go.
+         } // else if
+
+         len *= 2;  // grow buffer, try again.
+    } // while
+
+    if (retval != NULL)
+        free(retval);
+    return NULL;
+} // readSymLink
+
+
+static void chdirToApp(void)
+{
+    char *ptr;
+    char *path = readSymLink("/proc/self/exe");
+
+    if (path == NULL)
+        return;  // maybe we're already there, fail later if not.
+
+    ptr = strrchr(path, '/');
+    if (ptr != NULL)
+    {
+        *ptr = '\0';
+        if (chdir(path) == -1)
+            fprintf(stderr, "Couldn't chdir() to app directory?! %s\n", strerror(errno));
+    } // if
+
+    free(path);
+} // chdirToApp
+
+
 int main(int argc, char **argv)
 {
+    chdirToApp();
     initSignals();
     initPowermate(&argc, argv);
     gtk_init(&argc, &argv);