tAllow watching specific files, or entire directories - wendy - watch files/directories and run commands on any event
HTML git clone git://z3bra.org/wendy
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit f590ff91d8bd9abd87f575059b3bcbbb8dcbe6b8
DIR parent 586cde88d9631d6ab994f112253b34ee83a95771
HTML Author: z3bra <willy@mailoo.org>
Date: Tue, 11 Feb 2014 17:13:09 +0100
Allow watching specific files, or entire directories
Diffstat:
M wendy.c | 31 +++++++++++++++++++++----------
1 file changed, 21 insertions(+), 10 deletions(-)
---
DIR diff --git a/wendy.c b/wendy.c
t@@ -34,12 +34,13 @@ extern char **environ;
void
usage()
{
- fputs("usage: wendy [-C] [-D] [-M] [-f file] [-t timeout] "
+ fputs("usage: wendy [-C] [-D] [-M] [-d directory] [-f file] [-t timeout] "
"-e command [arguments]\n"
"\t-C : raise creation events\n"
"\t-D : raise deletion events\n"
"\t-M : raise modification events\n"
- "\t-f file : file to watch (everything is a file)\n"
+ "\t-d directory : directory to watch\n"
+ "\t-f file : file to watch in the directory\n"
"\t-t timeout : time between event check (in seconds)\n"
"\t-e command : command to launch (must be the last argument!)\n",
stdout);
t@@ -62,7 +63,7 @@ main (int argc, char **argv)
{
int fd, wd, len, mask = 0, i = 0, timeout = 0, ignore = 0;
char buf[BUF_LEN];
- char *file = NULL, **cmd = NULL;
+ char *dir = NULL, *file = NULL, **cmd = NULL;
struct inotify_event *ev;
if ((argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')) usage();
t@@ -74,15 +75,15 @@ main (int argc, char **argv)
case 'D': mask |= IN_DELETE; break;
case 'M': mask |= IN_MODIFY; break;
case 'f': file = argv[++i]; break;
+ case 'd': dir = argv[++i]; break;
case 't': timeout = atoi(argv[++i]); break;
case 'e': cmd = &argv[++i]; ignore=1; break;
}
}
/* test given arguments */
- if (!file) { file = DEFAULT_FILE; }
+ if (!dir) { dir = DEFAULT_FILE; }
if (!timeout) { timeout = DEFAULT_CHECK; }
- if (!cmd) { usage(); }
if (!mask) { mask |= IN_CREATE; }
/* get file descriptor */
t@@ -91,13 +92,13 @@ main (int argc, char **argv)
perror("inotify_init");
/* add a watcher on the file */
- wd = inotify_add_watch(fd, file, mask);
+ wd = inotify_add_watch(fd, dir, mask);
if (wd < 0)
perror("inotify_add_watch");
/* start looping */
- while (1) {
+ for (;;) {
/* get every event raised, and queue them */
len = read(fd, buf, BUF_LEN);
t@@ -118,9 +119,19 @@ main (int argc, char **argv)
printf("event on file %s: %u\n", ev->name, ev->mask);
}
- /* OMG a new event ! Quick, raise an alert ! */
- if (!fork()) {
- execvpe(cmd[0], cmd, environ);
+ /*
+ * do not do anything if no command given.
+ * Also only execute the command if the file concerned by the event
+ * is the one we're watching, or if we're not looking for a specific
+ * file.
+ *
+ * If you don't undersand this sentence, don't worry. Me neither.
+ * Just trust the if().
+ */
+ if (cmd && !(file && strncmp(file, ev->name, 255))) {
+
+ /* OMG a new event ! Quick, raise an alert ! */
+ if (!fork()) { execvpe(cmd[0], cmd, environ); }
}
/* jump to the next one */