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author | Lennart Poettering <lennart@poettering.net> | 2011-03-15 00:44:13 +0100 |
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committer | Lennart Poettering <lennart@poettering.net> | 2011-03-15 00:45:46 +0100 |
commit | 2a796654b9a1f84962e5dafbcf171dcc22742c99 (patch) | |
tree | 48ede42feb5e59732a77158b11e5eca75d8c9eda /src/getty-generator.c | |
parent | 2fc9784656900c4dc3715db506096ddc23fdd87c (diff) | |
download | systemd-2a796654b9a1f84962e5dafbcf171dcc22742c99.tar.gz |
getty: move automatic serial getty logic into generator
Diffstat (limited to 'src/getty-generator.c')
-rw-r--r-- | src/getty-generator.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/getty-generator.c b/src/getty-generator.c new file mode 100644 index 0000000000..f49f9eae99 --- /dev/null +++ b/src/getty-generator.c @@ -0,0 +1,127 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <string.h> +#include <errno.h> +#include <unistd.h> + +#include "log.h" +#include "util.h" +#include "unit-name.h" + +const char *arg_dest = "/tmp"; + +static int add_symlink(const char *fservice, const char *tservice) { + char *from = NULL, *to = NULL; + int r; + + asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice); + asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice); + + if (!from || !to) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(to, 0755); + + if ((r = symlink(from, to)) < 0) { + log_error("Failed to create symlink from %s to %s: %m", from, to); + r = -errno; + } + +finish: + + free(from); + free(to); + + return r; +} + +int main(int argc, char *argv[]) { + int r = EXIT_SUCCESS; + char *active; + + if (argc > 2) { + log_error("This program takes one or no arguments."); + return EXIT_FAILURE; + } + + if (argc > 1) + arg_dest = argv[1]; + + log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); + log_parse_environment(); + log_open(); + + if (detect_container(NULL) > 0) { + log_debug("Automatic adding console shell."); + + if (add_symlink("console-shell.service", "console-shell.service") < 0) + r = EXIT_FAILURE; + + /* Don't add any further magic if we are in a container */ + goto finish; + } + + if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { + const char *tty; + + truncate_nl(active); + if ((tty = strrchr(active, ' '))) + tty ++; + else + tty = active; + + /* Automatically add in a serial getty on the kernel + * console */ + if (!tty_is_vc(tty)) { + char *n; + + /* We assume that gettys on virtual terminals are + * started via manual configuration and do this magic + * only for non-VC terminals. */ + + log_debug("Automatically adding serial getty for /dev/%s.", tty); + + if (!(n = unit_name_replace_instance("serial-getty@.service", tty)) || + add_symlink("serial-getty@.service", n) < 0) + r = EXIT_FAILURE; + + free(n); + } + + free(active); + } + + /* Automatically add in a serial getty on the first + * virtualizer console */ + if (access("/sys/class/tty/hvc0", F_OK) == 0) { + log_debug("Automatic adding serial getty for hvc0."); + + if (add_symlink("serial-getty@.service", "serial-getty@hvc0.service") < 0) + r = EXIT_FAILURE; + } + +finish: + return r; +} |