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| author | Vaclav Dolezal | 2018-04-20 17:57:39 +0200 |
|---|---|---|
| committer | Karel Zak | 2018-06-11 16:16:32 +0200 |
| commit | d59766a64806d3acc409bd27cdd6a58e2d6e405f (patch) | |
| tree | 75c61629e662808350a67429083688fe58802404 /sys-utils/mount.c | |
| parent | mount: document --namespace in man/help (diff) | |
| download | kernel-qcow2-util-linux-d59766a64806d3acc409bd27cdd6a58e2d6e405f.tar.gz kernel-qcow2-util-linux-d59766a64806d3acc409bd27cdd6a58e2d6e405f.tar.xz kernel-qcow2-util-linux-d59766a64806d3acc409bd27cdd6a58e2d6e405f.zip | |
mount: allow PID as --namespace argument
[[kzak@redhat.com: - update code]
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Vaclav Dolezal <vdolezal@redhat.com>
Diffstat (limited to 'sys-utils/mount.c')
| -rw-r--r-- | sys-utils/mount.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/sys-utils/mount.c b/sys-utils/mount.c index a0dba721a..5e139e896 100644 --- a/sys-utils/mount.c +++ b/sys-utils/mount.c @@ -512,6 +512,19 @@ static long osrc2mask(const char *str, size_t len) return -EINVAL; } +static pid_t parse_pid(const char *str) +{ + char *end; + pid_t ret; + + errno = 0; + ret = strtoul(str, &end, 10); + + if (ret < 0 || errno || end == str || (end && *end)) + return 0; + return ret; +} + int main(int argc, char **argv) { int c, rc = MNT_EX_SUCCESS, all = 0, show_labels = 0; @@ -694,9 +707,17 @@ int main(int argc, char **argv) append_option(cxt, "rbind"); break; case 'N': - if (mnt_context_set_target_ns(cxt, optarg)) - err(MNT_EX_SYSERR, _("failed to set target namespace")); + { + char path[PATH_MAX]; + pid_t pid = parse_pid(optarg); + + if (pid) + snprintf(path, sizeof(path), "/proc/%i/ns/mnt", pid); + + if (mnt_context_set_target_ns(cxt, pid ? path : optarg)) + err(MNT_EX_SYSERR, _("failed to set target namespace to %s"), pid ? path : optarg); break; + } case MOUNT_OPT_SHARED: append_option(cxt, "shared"); propa = 1; |