cli: add global option --stderr=FILE

[notmuch] / notmuch.c

diff --git a/notmuch.c b/notmuch.c
index 3241e23f0cc988d14a6527cdf355aa69f9e3f795..15e90c8155ab2d34e331459ae83e725d39aa2b75 100644 (file)
--- a/notmuch.c
+++ b/notmuch.c
@@ -251,6 +251,32 @@ notmuch_command (notmuch_config_t *config,
     return 0;
 }
 
+static int
+redirect_stderr (const char * stderr_file)
+{
+    if (strcmp (stderr_file, "-") == 0) {
+       if (dup2 (STDOUT_FILENO, STDERR_FILENO) < 0) {
+           perror ("dup2");
+           return 1;
+       }
+    } else {
+       int fd = open (stderr_file, O_WRONLY|O_CREAT|O_TRUNC, 0666);
+       if (fd < 0) {
+           fprintf (stderr, "Error: Cannot redirect stderr to '%s': %s\n",
+                    stderr_file, strerror (errno));
+           return 1;
+       }
+       if (fd != STDERR_FILENO) {
+           if (dup2 (fd, STDERR_FILENO) < 0) {
+               perror ("dup2");
+               return 1;
+           }
+           close (fd);
+       }
+    }
+    return 0;
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -258,6 +284,8 @@ main (int argc, char *argv[])
     char *talloc_report;
     const char *command_name = NULL;
     command_t *command;
+    char *config_file_name = NULL;
+    char *stderr_file = NULL;
     notmuch_config_t *config;
     notmuch_bool_t print_help=FALSE, print_version=FALSE;
     int opt_index;
@@ -266,6 +294,8 @@ main (int argc, char *argv[])
     notmuch_opt_desc_t options[] = {
        { NOTMUCH_OPT_BOOLEAN, &print_help, "help", 'h', 0 },
        { NOTMUCH_OPT_BOOLEAN, &print_version, "version", 'v', 0 },
+       { NOTMUCH_OPT_STRING, &config_file_name, "config", 'c', 0 },
+       { NOTMUCH_OPT_STRING, &stderr_file, "stderr", '\0', 0 },
        { 0, 0, 0, 0, 0 }
     };
 
@@ -285,6 +315,10 @@ main (int argc, char *argv[])
        return 1;
     }
 
+    if (stderr_file && redirect_stderr (stderr_file) != 0) {
+       /* error already printed */
+       return 1;
+    }
     if (print_help)
        return notmuch_help_command (NULL, argc - 1, &argv[1]);
 
@@ -303,7 +337,7 @@ main (int argc, char *argv[])
        return 1;
     }
 
-    config = notmuch_config_open (local, NULL, command->create_config);
+    config = notmuch_config_open (local, config_file_name, command->create_config);
     if (!config)
        return 1;