Use start_command() to run content filters instead of explicit fork/exec.

The previous code already used finish_command() to wait for the process
to terminate, but did not use start_command() to run it.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/convert.c b/convert.c
index aa95834eb3e3f55a2bcb8e6c6f8258f4a57b594e..d83c2fcc5e2afb9b9e19d232ce38f7bec91513ce 100644 (file)
--- a/convert.c
+++ b/convert.c
@@ -199,34 +199,18 @@ static int filter_buffer(const char *path, const char *src,
         * Spawn cmd and feed the buffer contents through its stdin.
         */
        struct child_process child_process;
-       int pipe_feed[2];
        int write_err, status;
+       const char *argv[] = { "sh", "-c", cmd, NULL };
 
        memset(&child_process, 0, sizeof(child_process));
+       child_process.argv = argv;
+       child_process.in = -1;
 
-       if (pipe(pipe_feed) < 0) {
-               error("cannot create pipe to run external filter %s", cmd);
-               return 1;
-       }
-
-       child_process.pid = fork();
-       if (child_process.pid < 0) {
-               error("cannot fork to run external filter %s", cmd);
-               close(pipe_feed[0]);
-               close(pipe_feed[1]);
-               return 1;
-       }
-       if (!child_process.pid) {
-               dup2(pipe_feed[0], 0);
-               close(pipe_feed[0]);
-               close(pipe_feed[1]);
-               execlp("sh", "sh", "-c", cmd, NULL);
-               return 1;
-       }
-       close(pipe_feed[0]);
+       if (start_command(&child_process))
+               return error("cannot fork to run external filter %s", cmd);
 
-       write_err = (write_in_full(pipe_feed[1], src, size) < 0);
-       if (close(pipe_feed[1]))
+       write_err = (write_in_full(child_process.in, src, size) < 0);
+       if (close(child_process.in))
                write_err = 1;
        if (write_err)
                error("cannot feed the input to external filter %s", cmd);