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autofs-5.0.9 - amd lookup fix lofs mounting
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From: Ian Kent <raven@themaw.net>
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The kernel leaves mount type autofs alone because they are supposed
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to be autofs sub-mounts and they look after their own expiration. So
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mounts bound to an autofs submount won't ever be expired.
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---
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daemon/spawn.c | 42 ++++++++++++++++++++++++++++++++++++++----
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1 file changed, 38 insertions(+), 4 deletions(-)
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diff --git a/daemon/spawn.c b/daemon/spawn.c
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index a6c8c34..bfb8cfc 100644
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--- a/daemon/spawn.c
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+++ b/daemon/spawn.c
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@@ -111,6 +111,12 @@ static int timed_read(int pipe, char *buf, size_t len, int time)
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return ret;
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}
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+ if (pfd[0].fd == -1)
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+ return 0;
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+
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+ if ((pfd[0].revents & (POLLIN|POLLHUP)) == POLLHUP)
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+ return 0;
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+
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while ((ret = read(pipe, buf, len)) == -1 && errno == EINTR);
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return ret;
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@@ -179,7 +185,8 @@ static int do_spawn(unsigned logopt, unsigned int wait,
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* I hope host names are never allowed "/" as first char
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*/
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if (use_open && *(argv[loc]) == '/') {
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- int fd;
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+ char **p;
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+ int is_bind, fd;
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pid_t pgrp = getpgrp();
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@@ -209,6 +216,33 @@ static int do_spawn(unsigned logopt, unsigned int wait,
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setegid(0);
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if (pgrp >= 0)
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setpgid(0, pgrp);
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+
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+ /*
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+ * The kernel leaves mount type autofs alone because
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+ * they are supposed to be autofs sub-mounts and they
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+ * look after their own expiration. So mounts bound
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+ * to an autofs submount won't ever be expired.
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+ */
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+ is_bind = 0;
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+ p = (char **) argv;
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+ while (*p) {
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+ if (strcmp(*p, "--bind")) {
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+ p++;
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+ continue;
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+ }
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+ is_bind = 1;
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+ break;
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+ }
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+ if (!is_bind)
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+ goto done;
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+
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+ if (is_mounted(_PROC_MOUNTS, argv[loc], MNTS_AUTOFS)) {
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+ fprintf(stderr,
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+ "error: can't bind to an autofs mount\n");
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+ close(STDOUT_FILENO);
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+ close(STDERR_FILENO);
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+ _exit(EINVAL);
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+ }
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}
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done:
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execv(prog, (char *const *) argv);
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@@ -384,7 +418,7 @@ int spawn_mount(unsigned logopt, ...)
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while (retries--) {
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ret = do_spawn(logopt, wait, options, prog, (const char **) argv);
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- if (ret & MTAB_NOTUPDATED) {
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+ if (ret == MTAB_NOTUPDATED) {
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struct timespec tm = {3, 0};
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/*
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@@ -502,7 +536,7 @@ int spawn_bind_mount(unsigned logopt, ...)
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while (retries--) {
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ret = do_spawn(logopt, -1, options, prog, (const char **) argv);
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- if (ret & MTAB_NOTUPDATED) {
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+ if (ret == MTAB_NOTUPDATED) {
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struct timespec tm = {3, 0};
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/*
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@@ -604,7 +638,7 @@ int spawn_umount(unsigned logopt, ...)
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while (retries--) {
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ret = do_spawn(logopt, wait, options, prog, (const char **) argv);
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- if (ret & MTAB_NOTUPDATED) {
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+ if (ret == MTAB_NOTUPDATED) {
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/*
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* If the mount succeeded but the mtab was not
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* updated, then retry the umount just to update
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