diff options
| -rw-r--r-- | miscutils/inotifyd.c | 51 |
1 files changed, 29 insertions, 22 deletions
diff --git a/miscutils/inotifyd.c b/miscutils/inotifyd.c index 5ac4738..0c4b067 100644 --- a/miscutils/inotifyd.c +++ b/miscutils/inotifyd.c @@ -51,6 +51,7 @@ extern int inotify_add_watch(int fd, const char *path, uint32_t mask); int inotifyd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int inotifyd_main(int argc UNUSED_PARAM, char **argv) { + int n; unsigned mask = IN_ALL_EVENTS; // assume we want all events struct pollfd pfd; char **watched = ++argv; // watched name list @@ -69,7 +70,6 @@ int inotifyd_main(int argc UNUSED_PARAM, char **argv) while (*++argv) { char *path = *argv; char *masks = strchr(path, ':'); - int wd; // watch descriptor // if mask is specified -> if (masks) { *masks = '\0'; // split path and mask @@ -83,32 +83,39 @@ int inotifyd_main(int argc UNUSED_PARAM, char **argv) } } // add watch - wd = inotify_add_watch(pfd.fd, path, mask); - if (wd < 0) { + n = inotify_add_watch(pfd.fd, path, mask); + if (n < 0) bb_perror_msg_and_die("add watch (%s) failed", path); -// } else { -// bb_error_msg("added %d [%s]:%4X", wd, path, mask); - } + //bb_error_msg("added %d [%s]:%4X", n, path, mask); } // setup signals - bb_signals(0 - + (1 << SIGHUP) - + (1 << SIGINT) - + (1 << SIGTERM) - + (1 << SIGPIPE) - , record_signo); + bb_signals(BB_FATAL_SIGS, record_signo); // do watch - -// pfd.fd = fd; pfd.events = POLLIN; - - while (!bb_got_signal && poll(&pfd, 1, -1) > 0) { + while (1) { ssize_t len; void *buf; struct inotify_event *ie; + again: + if (bb_got_signal) + break; + n = poll(&pfd, 1, -1); + /* Signal interrupted us? */ + if (n < 0 && errno == EINTR) + goto again; + // Under Linux, above if() is not necessary. + // Non-fatal signals, e.g. SIGCHLD, when set to SIG_DFL, + // are not interrupting poll(). + // Thus we can just break if n <= 0 (see below), + // because EINTR will happen only on SIGTERM et al. + // But this might be not true under other Unixes, + // and is generally way too subtle to depend on. + if (n <= 0) // strange error? + break; + // read out all pending events xioctl(pfd.fd, FIONREAD, &len); #define eventbuf bb_common_bufsiz1 @@ -117,21 +124,21 @@ int inotifyd_main(int argc UNUSED_PARAM, char **argv) // process events. N.B. events may vary in length while (len > 0) { int i; - char events[12]; + char events[sizeof(mask_names)]; char *s = events; unsigned m = ie->mask; - for (i = 0; i < 12; ++i, m >>= 1) { - if (m & 1) { + for (i = 0; i < sizeof(mask_names)-1; ++i, m >>= 1) { + if (m & 1) *s++ = mask_names[i]; - } } *s = '\0'; -// bb_error_msg("exec %s %08X\t%s\t%s\t%s", agent, ie->mask, events, watched[ie->wd], ie->len ? ie->name : ""); + //bb_error_msg("exec %s %08X\t%s\t%s\t%s", agent, + // ie->mask, events, watched[ie->wd], ie->len ? ie->name : ""); args[1] = events; args[2] = watched[ie->wd]; args[3] = ie->len ? ie->name : NULL; - xspawn((char **)args); + wait4pid(xspawn((char **)args)); // next event i = sizeof(struct inotify_event) + ie->len; len -= i; |