progress: treat "no terminal" as being in the foreground

progress: treat "no terminal" as being in the foreground Commit 85cb890 (progress: no progress in background, 2015-04-13) avoids sending progress from background processes by checking that the process group id of the current process is the same as that of the controlling terminal. If we don't have a terminal, however, this check never succeeds, and we print no progress at all (until the final "done" message). This can be seen when cloning a large repository; instead of getting progress updates for "counting objects", it will appear to hang then print the final count. We can fix this by treating an error return from tcgetpgrp() as a signal to show the progress. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jeff King committed May 19, 2015 at 01:24 UTC a4fb76ce1916939c7e6359f9416f2af4a760f6f1
1 file changed +2 -1
progress.c
+2 -1
@@ -74,7 +74,8 @@ static void clear_progress_signal(void)
74
75 static int is_foreground_fd(int fd)
76 {
77 - return getpgid(0) == tcgetpgrp(fd);
77 + int tpgrp = tcgetpgrp(fd);
78 + return tpgrp < 0 || tpgrp == getpgid(0);
79 }
80
81 static int display(struct progress *progress, unsigned n, const char *done)