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vconsole: add new utility to initialize the virtual console

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This commit is contained in:
Lennart Poettering 2010-09-16 00:36:41 +02:00
parent 8e12a6aed3
commit 97c4a07df9
11 changed files with 457 additions and 34 deletions
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2
.gitignore vendored
View File

@ -2,7 +2,7 @@ systemd-kmsg-syslogd
systemd-remount-api-vfs
test-hostname
systemd-modules-load
systemd-auto-serial-getty
systemd-vconsole-setup
systemd-shutdownd
systemd-random-seed
systemd-update-utmp

14
Makefile.am
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@ -75,7 +75,8 @@ rootlibexec_PROGRAMS = \
systemd-shutdownd \
systemd-modules-load \
systemd-remount-api-vfs \
systemd-kmsg-syslogd
systemd-kmsg-syslogd \
systemd-vconsole-setup
noinst_PROGRAMS = \
test-engine \
@ -180,6 +181,7 @@ nodist_systemunit_DATA = \
units/systemd-shutdownd.service \
units/systemd-kmsg-syslogd.service \
units/systemd-modules-load.service \
units/systemd-vconsole-setup.service \
units/systemd-remount-api-vfs.service \
units/systemd-update-utmp-runlevel.service \
units/systemd-update-utmp-shutdown.service \
@ -206,6 +208,7 @@ EXTRA_DIST = \
units/systemd-shutdownd.service.in \
units/systemd-kmsg-syslogd.service.in \
units/systemd-modules-load.service.in \
units/systemd-vconsole-setup.service.in \
units/systemd-remount-api-vfs.service.in \
units/systemd-update-utmp-runlevel.service.in \
units/systemd-update-utmp-shutdown.service.in \
@ -594,6 +597,15 @@ systemd_modules_load_CFLAGS = \
systemd_modules_load_LDADD = \
libsystemd-basic.la
systemd_vconsole_setup_SOURCES = \
src/vconsole-setup.c
systemd_vconsole_setup_CFLAGS = \
$(AM_CFLAGS)
systemd_vconsole_setup_LDADD = \
libsystemd-basic.la
systemd_remount_api_vfs_SOURCES = \
src/remount-api-vfs.c \
src/mount-setup.c

2
src/conf-parser.c
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@ -31,8 +31,6 @@
#include "strv.h"
#include "log.h"
#define COMMENTS "#;\n"
/* Run the user supplied parser for an assignment */
static int next_assignment(
const char *filename,

25
src/kmod-setup.c
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@ -42,7 +42,6 @@ int kmod_setup(void) {
ExecContext context;
pid_t pid;
int r;
siginfo_t status;
for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) {
@ -74,28 +73,10 @@ int kmod_setup(void) {
r = exec_spawn(&command, NULL, &context, NULL, 0, NULL, false, false, false, false, NULL, &pid);
exec_context_done(&context);
if (r < 0)
if (r < 0) {
log_error("Failed to spawn %s: %s", cmdline[0], strerror(-r));
return r;
if ((r = wait_for_terminate(pid, &status)) < 0)
return -errno;
if (status.si_code == CLD_EXITED) {
if (status.si_status != 0) {
log_warning("/sbin/modprobe failed with error code %i.", status.si_status);
return -EPROTO;
}
log_debug("/sbin/modprobe succeeded.");
return 0;
} else if (status.si_code == CLD_KILLED ||
status.si_code == CLD_DUMPED) {
log_warning("/sbin/modprobe terminated by signal %s.", signal_to_string(status.si_status));
return -EPROTO;
}
log_warning("/sbin/modprobe failed due to unknown reason.");
return -EPROTO;
return wait_for_terminate_and_warn(cmdline[0], pid);
}

2
src/load-fragment.c
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@ -42,8 +42,6 @@
#include "unit-name.h"
#include "bus-errors.h"
#define COMMENTS "#;\n"
static int config_parse_deps(
const char *filename,
unsigned line,

4
src/mount.c
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@ -1228,7 +1228,7 @@ static char *fstab_node_to_udev_node(char *p) {
if (startswith(p, "LABEL=")) {
if (!(u = unquote(p+6, '"')))
if (!(u = unquote(p+6, "\"\'")))
return NULL;
t = xescape(u, "/ ");
@ -1248,7 +1248,7 @@ static char *fstab_node_to_udev_node(char *p) {
if (startswith(p, "UUID=")) {
if (!(u = unquote(p+5, '"')))
if (!(u = unquote(p+5, "\"\'")))
return NULL;
t = xescape(u, "/ ");

182
src/util.c
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@ -504,7 +504,7 @@ finish:
int read_one_line_file(const char *fn, char **line) {
FILE *f;
int r;
char t[2048], *c;
char t[LINE_MAX], *c;
assert(fn);
assert(line);
@ -530,6 +530,149 @@ finish:
return r;
}
int read_full_file(const char *fn, char **contents) {
FILE *f;
int r;
size_t n, l;
char *buf = NULL;
struct stat st;
if (!(f = fopen(fn, "re")))
return -errno;
if (fstat(fileno(f), &st) < 0) {
r = -errno;
goto finish;
}
n = st.st_size > 0 ? st.st_size : LINE_MAX;
l = 0;
for (;;) {
char *t;
size_t k;
if (!(t = realloc(buf, n+1))) {
r = -ENOMEM;
goto finish;
}
buf = t;
k = fread(buf + l, 1, n - l, f);
if (k <= 0) {
if (ferror(f)) {
r = -errno;
goto finish;
}
break;
}
l += k;
n *= 2;
/* Safety check */
if (n > 4*1024*1024) {
r = -E2BIG;
goto finish;
}
}
if (buf)
buf[l] = 0;
else if (!(buf = calloc(1, 1))) {
r = -errno;
goto finish;
}
*contents = buf;
buf = NULL;
r = 0;
finish:
fclose(f);
free(buf);
return r;
}
int parse_env_file(
const char *fname,
const char *seperator, ...) {
int r;
char *contents, *p;
assert(fname);
assert(seperator);
if ((r = read_full_file(fname, &contents)) < 0)
return r;
p = contents;
for (;;) {
const char *key = NULL;
p += strspn(p, seperator);
p += strspn(p, WHITESPACE);
if (!*p)
break;
if (!strchr(COMMENTS, *p)) {
va_list ap;
char **value;
va_start(ap, seperator);
while ((key = va_arg(ap, char *))) {
size_t n;
char *v;
value = va_arg(ap, char **);
n = strlen(key);
if (strncmp(p, key, n) != 0 ||
p[n] != '=')
continue;
p += n + 1;
n = strcspn(p, seperator);
if (n >= 2 &&
strchr(QUOTES, v[0]) &&
v[n-1] == v[0])
v = strndup(p+1, n-2);
else
v = strndup(p, n);
if (!v) {
r = -ENOMEM;
va_end(ap);
goto fail;
}
free(*value);
*value = v;
p += n;
break;
}
va_end(ap);
}
if (!key)
p += strcspn(p, seperator);
}
r = 0;
fail:
free(contents);
return r;
}
char *truncate_nl(char *s) {
assert(s);
@ -3088,14 +3231,14 @@ int touch(const char *path) {
return 0;
}
char *unquote(const char *s, const char quote) {
char *unquote(const char *s, const char* quotes) {
size_t l;
assert(s);
if ((l = strlen(s)) < 2)
return strdup(s);
if (s[0] == quote && s[l-1] == quote)
if (strchr(quotes, s[0]) && s[l-1] == s[0])
return strndup(s+1, l-2);
return strdup(s);
@ -3120,6 +3263,39 @@ int wait_for_terminate(pid_t pid, siginfo_t *status) {
}
}
int wait_for_terminate_and_warn(const char *name, pid_t pid) {
int r;
siginfo_t status;
assert(name);
assert(pid > 1);
if ((r = wait_for_terminate(pid, &status)) < 0) {
log_warning("Failed to wait for %s: %s", name, strerror(-r));
return r;
}
if (status.si_code == CLD_EXITED) {
if (status.si_status != 0) {
log_warning("%s failed with error code %i.", name, status.si_status);
return -EPROTO;
}
log_debug("%s succeeded.", name);
return 0;
} else if (status.si_code == CLD_KILLED ||
status.si_code == CLD_DUMPED) {
log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
return -EPROTO;
}
log_warning("%s failed due to unknown reason.", name);
return -EPROTO;
}
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",

8
src/util.h
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@ -58,6 +58,8 @@ typedef struct dual_timestamp {
/* What is interpreted as whitespace? */
#define WHITESPACE " \t\n\r"
#define NEWLINE "\n\r"
#define QUOTES "\"\'"
#define COMMENTS "#;\n"
#define FORMAT_TIMESTAMP_MAX 64
#define FORMAT_TIMESTAMP_PRETTY_MAX 256
@ -185,6 +187,9 @@ pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
int write_one_line_file(const char *fn, const char *line);
int read_one_line_file(const char *fn, char **line);
int read_full_file(const char *fn, char **contents);
int parse_env_file(const char *fname, const char *seperator, ...) _sentinel_;
char *strappend(const char *s, const char *suffix);
char *strnappend(const char *s, const char *suffix, size_t length);
@ -343,9 +348,10 @@ char *ellipsize(const char *s, unsigned length, unsigned percent);
int touch(const char *path);
char *unquote(const char *s, const char quote);
char *unquote(const char *s, const char *quotes);
int wait_for_terminate(pid_t pid, siginfo_t *status);
int wait_for_terminate_and_warn(const char *name, pid_t pid);
#define NULSTR_FOREACH(i, l) \
for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)

231
src/vconsole-setup.c Normal file
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@ -0,0 +1,231 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Kay Sievers
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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdbool.h>
#include <stdarg.h>
#include <limits.h>
#include <locale.h>
#include <langinfo.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <linux/tiocl.h>
#include <linux/kd.h>
#include "util.h"
#include "log.h"
#include "macro.h"
static bool is_console(int fd) {
unsigned char data[1];
data[0] = TIOCL_GETFGCONSOLE;
return ioctl(fd, TIOCLINUX, data) >= 0;
}
static bool is_locale_utf8(void) {
const char *set;
if (!setlocale(LC_ALL, ""))
return true;
set = nl_langinfo(CODESET);
if (!set)
return true;
return streq(set, "UTF-8");
}
static int disable_utf8(int fd) {
int r = 0, k;
if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
r = -errno;
if (loop_write(fd, "\033%@", 3, false) < 0)
r = -errno;
if ((k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0")) < 0)
r = k;
if (r < 0)
log_warning("Failed to disable UTF-8: %s", strerror(errno));
return r;
}
static int load_keymap(const char *vc, const char *map, bool utf8, pid_t *_pid) {
const char *args[7];
int i = 0;
pid_t pid;
args[i++] = "/bin/loadkeys";
args[i++] = "-q";
args[i++] = "-C";
args[i++] = vc;
if (utf8)
args[i++] = "-u";
args[i++] = map;
args[i++] = NULL;
if ((pid = fork()) < 0) {
log_error("Failed to fork: %m");
return -errno;
} else if (pid == 0) {
execv(args[0], (char **) args);
_exit(EXIT_FAILURE);
}
*_pid = pid;
return 0;
}
static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
const char *args[9];
int i = 0;
pid_t pid;
args[i++] = "/bin/setfont";
args[i++] = "-C";
args[i++] = vc;
args[i++] = font;
if (map) {
args[i++] = "-m";
args[i++] = map;
}
if (unimap) {
args[i++] = "-u";
args[i++] = unimap;
}
args[i++] = NULL;
if ((pid = fork()) < 0) {
log_error("Failed to fork: %m");
return -errno;
} else if (pid == 0) {
execv(args[0], (char **) args);
_exit(EXIT_FAILURE);
}
*_pid = pid;
return 0;
}
int main(int argc, char **argv) {
const char *vc;
char *vc_keymap = NULL;
char *vc_font = NULL;
char *vc_font_map = NULL;
char *vc_font_unimap = NULL;
int fd = -1;
bool utf8;
int r = EXIT_FAILURE;
pid_t font_pid = 0, keymap_pid = 0;
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
if (argv[1])
vc = argv[1];
else
vc = "/dev/tty0";
if ((fd = open(vc, O_RDWR|O_CLOEXEC)) < 0) {
log_error("Failed to open %s: %m", vc);
goto finish;
}
if (!is_console(fd)) {
log_error("Device %s is not a virtual console.", vc);
goto finish;
}
if (!(utf8 = is_locale_utf8()))
disable_utf8(fd);
if ((r = parse_env_file(
"/etc/vconsole",
NEWLINE,
"VCONSOLE_KEYMAP", &vc_keymap,
"VCONSOLE_FONT", &vc_font,
"VCONSOLE_FONT_MAP", &vc_font_map,
"VCONSOLE_FONT_UNIMAP", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/vconsole: %s", strerror(-r));
}
if ((r = parse_env_file(
"/proc/cmdline",
WHITESPACE,
#ifdef TARGET_FEDORA
"SYSFONT", &vc_font,
"KEYTABLE", &vc_keymap,
#endif
"vconsole.keymap", &vc_keymap,
"vconsole.font", &vc_font,
"vconsole.font.map", &vc_font_map,
"vconsole.font.unimap", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
}
if (!vc_keymap)
vc_keymap = strdup("us");
if (!vc_font)
vc_font = strdup("latarcyrheb-sun16");
if (!vc_keymap || !vc_font) {
log_error("Failed to allocate strings.");
goto finish;
}
if (load_keymap(vc, vc_keymap, utf8, &keymap_pid) >= 0 &&
load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
r = EXIT_SUCCESS;
finish:
if (keymap_pid > 0)
wait_for_terminate_and_warn("/bin/loadkeys", keymap_pid);
if (font_pid > 0)
wait_for_terminate_and_warn("/bin/setfont", font_pid);
free(vc_keymap);
free(vc_font);
free(vc_font_map);
free(vc_font_unimap);
if (fd >= 0)
close_nointr_nofail(fd);
return r;
}

1
units/.gitignore vendored
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@ -2,6 +2,7 @@ serial-getty@.service
systemd-kmsg-syslogd.service
systemd-modules-load.service
systemd-remount-api-vfs.service
systemd-vconsole-setup.service
systemd-auto-serial-getty.service
systemd-shutdownd.service
systemd-random-seed-load.service

20
units/systemd-vconsole-setup.service.in Normal file
View File

@ -0,0 +1,20 @@
# This file is part of systemd.
#
# 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.
[Unit]
Description=Setup Virtual Console
DefaultDependencies=no
Conflicts=shutdown.target
Before=shutdown.target
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=@rootlibexecdir@/systemd-vconsole-setup
[Install]
WantedBy=sysinit.target