diff options
| author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-12-17 00:42:49 -0500 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-12-17 00:42:49 -0500 |
| commit | ccef261c077d31dce02aa92e519b23b3a2a58303 (patch) | |
| tree | 582fafc98c76e98e912f453fb55ca57f29273d57 /src/shared/switch-root.c | |
| parent | 5d4922bba91c6d60b3b9f38fb29fda0f6ba8338d (diff) | |
| parent | 5fb2a20a29c2cc0494d5a31e175a8e3ff0b2d3e2 (diff) | |
Merge tag 'systemd/v232-4.parabola1' into systemd/parabola
Diffstat (limited to 'src/shared/switch-root.c')
| -rw-r--r-- | src/shared/switch-root.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/src/shared/switch-root.c b/src/shared/switch-root.c index 47d3a5a1fa..4eff4f692e 100644 --- a/src/shared/switch-root.c +++ b/src/shared/switch-root.c @@ -75,17 +75,29 @@ int switch_root(const char *new_root, const char *oldroot, bool detach_oldroot, NULSTR_FOREACH(i, move_mounts) { char new_mount[PATH_MAX]; struct stat sb; + size_t n; - xsprintf(new_mount, "%s%s", new_root, i); + n = snprintf(new_mount, sizeof new_mount, "%s%s", new_root, i); + if (n >= sizeof new_mount) { + bool move = mountflags & MS_MOVE; + + log_warning("New path is too long, %s: %s%s", + move ? "forcing unmount instead" : "ignoring", + new_root, i); + + if (move) + if (umount2(i, MNT_FORCE) < 0) + log_warning_errno(errno, "Failed to unmount %s: %m", i); + continue; + } mkdir_p_label(new_mount, 0755); - if ((stat(new_mount, &sb) < 0) || + if (stat(new_mount, &sb) < 0 || sb.st_dev != new_root_stat.st_dev) { /* Mount point seems to be mounted already or - * stat failed. Unmount the old mount - * point. */ + * stat failed. Unmount the old mount point. */ if (umount2(i, MNT_DETACH) < 0) log_warning_errno(errno, "Failed to unmount %s: %m", i); continue; @@ -97,10 +109,9 @@ int switch_root(const char *new_root, const char *oldroot, bool detach_oldroot, if (umount2(i, MNT_FORCE) < 0) log_warning_errno(errno, "Failed to unmount %s: %m", i); - } - if (mountflags & MS_BIND) - log_error_errno(errno, "Failed to bind mount %s to %s: %m", i, new_mount); + } else if (mountflags & MS_BIND) + log_error_errno(errno, "Failed to bind mount %s to %s: %m", i, new_mount); } } |