diff options
Diffstat (limited to 'src/getty-generator')
| -rw-r--r-- | src/getty-generator/getty-generator.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/getty-generator/getty-generator.c b/src/getty-generator/getty-generator.c index 0dc407dd32..36a93695fb 100644 --- a/src/getty-generator/getty-generator.c +++ b/src/getty-generator/getty-generator.c @@ -29,6 +29,7 @@ #include "unit-name.h" #include "virt.h" #include "fileio.h" +#include "path-util.h" static const char *arg_dest = "/tmp"; @@ -77,6 +78,20 @@ static int add_serial_getty(const char *tty) { return add_symlink("serial-getty@.service", n); } +static int add_container_getty(const char *tty) { + _cleanup_free_ char *n = NULL; + + assert(tty); + + log_debug("Automatically adding container getty for /dev/pts/%s.", tty); + + n = unit_name_replace_instance("container-getty@.service", tty); + if (!n) + return log_oom(); + + return add_symlink("container-getty@.service", n); +} + int main(int argc, char *argv[]) { static const char virtualization_consoles[] = @@ -86,6 +101,7 @@ int main(int argc, char *argv[]) { _cleanup_free_ char *active = NULL; const char *j; + int r; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); @@ -102,11 +118,44 @@ int main(int argc, char *argv[]) { umask(0022); if (detect_container(NULL) > 0) { + _cleanup_free_ char *container_ttys = NULL; + log_debug("Automatically adding console shell."); if (add_symlink("console-getty.service", "console-getty.service") < 0) return EXIT_FAILURE; + /* When $container_ttys is set for PID 1, spawn + * gettys on all ptys named therein. Note that despite + * the variable name we only support ptys here. */ + + r = getenv_for_pid(1, "container_ttys", &container_ttys); + if (r >= 0) { + char *w, *state; + size_t l; + + FOREACH_WORD(w, l, container_ttys, state) { + const char *t; + char tty[l + 1]; + + memcpy(tty, w, l); + tty[l] = 0; + + /* First strip off /dev/ if it is specified */ + t = path_startswith(tty, "/dev/"); + if (!t) + t = tty; + + /* Then, make sure it's actually a pty */ + t = path_startswith(tty, "pts/"); + if (!t) + continue; + + if (add_container_getty(t) < 0) + return EXIT_FAILURE; + } + } + /* Don't add any further magic if we are in a container */ return EXIT_SUCCESS; } |