-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <fcntl.h>
-#include <string.h>
#include <unistd.h>
#include "alloc-util.h"
+#include "errno-util.h"
#include "fd-util.h"
#include "fileio.h"
+#include "generator.h"
#include "log.h"
-#include "mkdir.h"
+#include "mkdir-label.h"
+#include "parse-util.h"
#include "path-util.h"
#include "process-util.h"
-#include "string-util.h"
+#include "proc-cmdline.h"
+#include "strv.h"
#include "terminal-util.h"
#include "unit-name.h"
-#include "util.h"
#include "virt.h"
-static const char *arg_dest = "/tmp";
+static const char *arg_dest = NULL;
+static bool arg_enabled = true;
static int add_symlink(const char *fservice, const char *tservice) {
char *from, *to;
assert(fservice);
assert(tservice);
- from = strjoina(SYSTEM_DATA_UNIT_PATH "/", fservice);
+ from = strjoina(SYSTEM_DATA_UNIT_DIR "/", fservice);
to = strjoina(arg_dest, "/getty.target.wants/", tservice);
- mkdir_parents_label(to, 0755);
+ (void) mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
}
static int verify_tty(const char *name) {
- _cleanup_close_ int fd = -1;
+ _cleanup_close_ int fd = -EBADF;
const char *p;
/* Some TTYs are weird and have been enumerated but don't work
errno = 0;
if (isatty(fd) <= 0)
- return errno > 0 ? -errno : -EIO;
+ return errno_or_else(EIO);
return 0;
}
-int main(int argc, char *argv[]) {
+static int run_container(void) {
+ _cleanup_free_ char *container_ttys = NULL;
+ int r;
- static const char virtualization_consoles[] =
- "hvc0\0"
- "xvc0\0"
- "hvsi0\0"
- "sclp_line0\0"
- "ttysclp0\0"
- "3270!tty1\0";
+ log_debug("Automatically adding console shell.");
- _cleanup_free_ char *active = NULL;
- const char *j;
- int r;
+ r = add_symlink("console-getty.service", "console-getty.service");
+ if (r < 0)
+ return r;
- if (argc > 1 && argc != 4) {
- log_error("This program takes three or no arguments.");
- 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. */
- if (argc > 1)
- arg_dest = argv[1];
+ (void) getenv_for_pid(1, "container_ttys", &container_ttys);
- log_set_prohibit_ipc(true);
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
+ for (const char *p = container_ttys;;) {
+ _cleanup_free_ char *word = NULL;
- umask(0022);
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse $container_ttys: %m");
+ if (r == 0)
+ return 0;
- if (detect_container() > 0) {
- _cleanup_free_ char *container_ttys = NULL;
+ const char *tty = word;
- log_debug("Automatically adding console shell.");
+ /* First strip off /dev/ if it is specified */
+ tty = path_startswith(tty, "/dev/") ?: tty;
- if (add_symlink("console-getty.service", "console-getty.service") < 0)
- return EXIT_FAILURE;
+ /* Then, make sure it's actually a pty */
+ tty = path_startswith(tty, "pts/");
+ if (!tty)
+ continue;
- /* 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 = add_container_getty(tty);
+ if (r < 0)
+ return r;
+ }
+}
- r = getenv_for_pid(1, "container_ttys", &container_ttys);
- if (r > 0) {
- const char *word, *state;
- size_t l;
+static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
+ int r;
- FOREACH_WORD(word, l, container_ttys, state) {
- const char *t;
- char tty[l + 1];
+ assert(key);
- memcpy(tty, word, l);
- tty[l] = 0;
+ if (proc_cmdline_key_streq(key, "systemd.getty_auto")) {
+ r = value ? parse_boolean(value) : 1;
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse getty_auto switch \"%s\", ignoring: %m", value);
+ else
+ arg_enabled = r;
+ }
- /* First strip off /dev/ if it is specified */
- t = path_startswith(tty, "/dev/");
- if (!t)
- t = tty;
+ return 0;
+}
- /* Then, make sure it's actually a pty */
- t = path_startswith(t, "pts/");
- if (!t)
- continue;
+static int run(const char *dest, const char *dest_early, const char *dest_late) {
+ _cleanup_free_ char *getty_auto = NULL;
+ int r;
+
+ assert_se(arg_dest = dest);
+
+ r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
- if (add_container_getty(t) < 0)
- return EXIT_FAILURE;
- }
- }
+ r = getenv_for_pid(1, "SYSTEMD_GETTY_AUTO", &getty_auto);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse $SYSTEMD_GETTY_AUTO environment variable, ignoring: %m");
+ else if (r > 0) {
+ r = parse_boolean(getty_auto);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse $SYSTEMD_GETTY_AUTO value \"%s\", ignoring: %m", getty_auto);
+ else
+ arg_enabled = r;
+ }
- /* Don't add any further magic if we are in a container */
- return EXIT_SUCCESS;
+ if (!arg_enabled) {
+ log_debug("Disabled, exiting.");
+ return 0;
}
- if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
- const char *word, *state;
- size_t l;
+ if (detect_container() > 0)
+ /* Add console shell and look at $container_ttys, but don't do add any
+ * further magic if we are in a container. */
+ return run_container();
- /* Automatically add in a serial getty on all active
- * kernel consoles */
- FOREACH_WORD(word, l, active, state) {
- _cleanup_free_ char *tty = NULL;
+ /* Automatically add in a serial getty on all active kernel consoles */
+ _cleanup_free_ char *active = NULL;
+ (void) read_one_line_file("/sys/class/tty/console/active", &active);
+ for (const char *p = active;;) {
+ _cleanup_free_ char *tty = NULL;
- tty = strndup(word, l);
- if (!tty) {
- log_oom();
- return EXIT_FAILURE;
- }
+ r = extract_first_word(&p, &tty, NULL, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse /sys/class/tty/console/active: %m");
+ if (r == 0)
+ break;
- /* We assume that gettys on virtual terminals are
- * started via manual configuration and do this magic
- * only for non-VC terminals. */
+ /* We assume that gettys on virtual terminals are started via manual configuration and do
+ * this magic only for non-VC terminals. */
- if (isempty(tty) || tty_is_vc(tty))
- continue;
+ if (isempty(tty) || tty_is_vc(tty))
+ continue;
- if (verify_tty(tty) < 0)
- continue;
+ if (verify_tty(tty) < 0)
+ continue;
- if (add_serial_getty(tty) < 0)
- return EXIT_FAILURE;
- }
+ r = add_serial_getty(tty);
+ if (r < 0)
+ return r;
}
- /* Automatically add in a serial getty on the first
- * virtualizer console */
- NULSTR_FOREACH(j, virtualization_consoles) {
- char *p;
-
- p = strjoina("/sys/class/tty/", j);
+ /* Automatically add in a serial getty on the first virtualizer console */
+ FOREACH_STRING(j,
+ "hvc0",
+ "xvc0",
+ "hvsi0",
+ "sclp_line0",
+ "ttysclp0",
+ "3270!tty1") {
+ _cleanup_free_ char *p = NULL;
+
+ p = path_join("/sys/class/tty", j);
+ if (!p)
+ return -ENOMEM;
if (access(p, F_OK) < 0)
continue;
- if (add_serial_getty(j) < 0)
- return EXIT_FAILURE;
+ r = add_serial_getty(j);
+ if (r < 0)
+ return r;
}
- return EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_GENERATOR_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff