diff options
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/util.c | 18 | ||||
| -rw-r--r-- | src/shared/util.h | 1 |
2 files changed, 17 insertions, 2 deletions
diff --git a/src/shared/util.c b/src/shared/util.c index 15c7f4d325..43948ccbd8 100644 --- a/src/shared/util.c +++ b/src/shared/util.c @@ -56,6 +56,7 @@ #include <glob.h> #include <grp.h> #include <sys/mman.h> +#include <sys/statvfs.h> #include "macro.h" #include "util.h" @@ -4319,8 +4320,10 @@ bool tty_is_vc_resolve(const char *tty) { if (startswith(tty, "/dev/")) tty += 5; - /* Resolve where /dev/console is pointing to */ - if (streq(tty, "console")) + /* Resolve where /dev/console is pointing to, if /sys is + * actually ours (i.e. not read-only-mounted which is a sign + * for container setups) */ + if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { /* If multiple log outputs are configured the * last one is what /dev/console points to */ @@ -6145,3 +6148,14 @@ int setrlimit_closest(int resource, const struct rlimit *rlim) { return 0; } + +int path_is_read_only_fs(const char *path) { + struct statvfs st; + + assert(path); + + if (statvfs(path, &st) < 0) + return -errno; + + return !!(st.f_flag & ST_RDONLY); +} diff --git a/src/shared/util.h b/src/shared/util.h index efb2c7d324..76bc7b3572 100644 --- a/src/shared/util.h +++ b/src/shared/util.h @@ -350,6 +350,7 @@ ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll); ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll); int path_is_mount_point(const char *path, bool allow_symlink); +int path_is_read_only_fs(const char *path); bool is_device_path(const char *path); |