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autofs-5.1.6 - cleanup stale logpri fifo pipes on unlink and exit
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From: Ian Kent <raven@themaw.net>
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If the unlink and exit option is given then stale fifo pipe files
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need to be cleaned up since the entire tree of mounts below autofs
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managed directories will be unlinked as well as the autofs mounts
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themselves.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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daemon/automount.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++--
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2 files changed, 52 insertions(+), 2 deletions(-)
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--- autofs-5.1.4.orig/CHANGELOG
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+++ autofs-5.1.4/CHANGELOG
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@@ -90,6 +90,7 @@ xx/xx/2018 autofs-5.1.5
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- improve force unlink option description.
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- remove command fifo on autofs mount fail.
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- add force unlink mounts and exit option.
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+- cleanup stale logpri fifo pipes on unlink and exit.
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19/12/2017 autofs-5.1.4
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- fix spec file url.
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--- autofs-5.1.4.orig/daemon/automount.c
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+++ autofs-5.1.4/daemon/automount.c
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@@ -60,7 +60,8 @@ unsigned int nfs_mount_uses_string_optio
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static struct nfs_mount_vers vers, check = {1, 1, 1};
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/* autofs fifo name prefix */
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-const char *fifodir = AUTOFS_FIFO_DIR "/autofs.fifo";
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+#define FIFO_NAME_PREFIX "autofs.fifo"
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+const char *fifodir = AUTOFS_FIFO_DIR "/" FIFO_NAME_PREFIX;
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const char *global_options; /* Global option, from command line */
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@@ -887,6 +888,48 @@ out_free:
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return ret;
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}
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+static void cleanup_stale_logpri_fifo_pipes(void)
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+{
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+ size_t prefix_len = strlen(FIFO_NAME_PREFIX);
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+ char *dir = AUTOFS_FIFO_DIR;
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+ size_t dir_len = strlen(dir);
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+ struct dirent *dent;
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+ DIR *dfd;
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+ int ret;
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+
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+ dfd = opendir(dir);
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+ if (!dfd) {
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+ warn(LOGOPT_ANY, "failed to open fifo dir %s", dir);
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+ return;
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+ }
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+
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+ while ((dent = readdir(dfd))) {
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+ char fifo_path[PATH_MAX];
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+
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+ if (!(dent->d_type & DT_FIFO))
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+ continue;
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+ if (strncmp(FIFO_NAME_PREFIX, dent->d_name, prefix_len))
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+ continue;
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+ if ((dir_len + 1 + strlen(dent->d_name)) >= PATH_MAX) {
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+ warn(LOGOPT_ANY, "fifo path too long for buffer");
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+ continue;
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+ }
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+
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+ strcpy(fifo_path, dir);
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+ strcat(fifo_path, "/");
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+ strcat(fifo_path, dent->d_name);
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+
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+ ret = unlink(fifo_path);
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+ if (ret == -1) {
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+ char buf[MAX_ERR_BUF];
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+ char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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+ warn(LOGOPT_ANY, "unlink of fifo failed: %s", estr);
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+ }
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+ }
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+
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+ closedir(dfd);
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+}
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+
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static void handle_fifo_message(struct autofs_point *ap, int fd)
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{
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int ret;
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@@ -2670,7 +2713,13 @@ int main(int argc, char *argv[])
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}
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}
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- if (!(do_force_unlink & UNLINK_AND_EXIT)) {
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+ /* If the option to unlink all autofs mounts and exit has
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+ * been given remove logpri fifo files as all the mounts
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+ * will be detached leaving them stale.
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+ */
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+ if (do_force_unlink & UNLINK_AND_EXIT)
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+ cleanup_stale_logpri_fifo_pipes();
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+ else {
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/*
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* Mmm ... reset force unlink umount so we don't also do
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* this in future when we receive a HUP signal.
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