inotify: if PROG is -, print events to stdout

function                                             old     new   delta
inotifyd_main                                        516     589     +73
packed_usage                                       28698   28709     +11

Signed-off-by: Flemming Madsen <busybox@themadsens.dk>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 15 insertions, 6 deletions

diff --git a/miscutils/inotifyd.c b/miscutils/inotifyd.c
index b64e0abb9..7a1a6a2e5 100644
--- a/miscutils/inotifyd.c
+++ b/miscutils/inotifyd.c
@@ -33,6 +33,7 @@
 //usage:       "Run PROG on filesystem changes."
 //usage:     "\nWhen a filesystem event matching MASK occurs on FILEn,"
 //usage:     "\nPROG ACTUAL_EVENTS FILEn [SUBFILE] is run."
+//usage:     "\nIf PROG is -, events are sent to stdout."
 //usage:     "\nEvents:"
 //usage:     "\n        a       File is accessed"
 //usage:     "\n        c       File is modified"
@@ -177,12 +178,20 @@ int inotifyd_main(int argc, char **argv)
                                                 *s++ = mask_names[i];
                                 }
                                 *s = '\0';
-//                              bb_error_msg("exec %s %08X\t%s\t%s\t%s", args[0],
-//                                      ie->mask, events, watches[ie->wd], ie->len ? ie->name : "");
-                                args[1] = events;
-                                args[2] = watches[ie->wd];
-                                args[3] = ie->len ? ie->name : NULL;
-                                spawn_and_wait((char **)args);
+                                if (LONE_CHAR(args[0], '-')) {
+                                        /* "inotifyd - FILE": built-in echo */
+                                        printf(ie->len ? "%s\t%s\t%s\n" : "%s\t%s\n", events,
+                                                        watches[ie->wd],
+                                                        ie->name);
+                                        fflush(stdout);
+                                } else {
+//                                      bb_error_msg("exec %s %08X\t%s\t%s\t%s", args[0],
+//                                              ie->mask, events, watches[ie->wd], ie->len ? ie->name : "");
+                                        args[1] = events;
+                                        args[2] = watches[ie->wd];
+                                        args[3] = ie->len ? ie->name : NULL;
+                                        spawn_and_wait((char **)args);
+                                }
                                 // we are done if all files got final x event
                                 if (ie->mask & 0x8000) {
                                         if (--argc <= 0)