build-sys: make readahead and vconsole optional

1 files changed, 459 insertions, 0 deletions

diff --git a/src/vconsole/vconsole-setup.c b/src/vconsole/vconsole-setup.c
new file mode 100644
index 0000000000..91967891f1
--- /dev/null
+++ b/src/vconsole/vconsole-setup.c
@@ -0,0 +1,459 @@
+/*-*- 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"
+#include "virt.h"
+
+static bool is_vconsole(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, const char *map_toggle, bool utf8, pid_t *_pid) {
+        const char *args[8];
+        int i = 0;
+        pid_t pid;
+
+        if (isempty(map)) {
+                /* An empty map means kernel map */
+                *_pid = 0;
+                return 0;
+        }
+
+        args[i++] = KBD_LOADKEYS;
+        args[i++] = "-q";
+        args[i++] = "-C";
+        args[i++] = vc;
+        if (utf8)
+                args[i++] = "-u";
+        args[i++] = map;
+        if (map_toggle)
+                args[i++] = map_toggle;
+        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;
+
+        if (isempty(font)) {
+                /* An empty font means kernel font */
+                *_pid = 0;
+                return 0;
+        }
+
+        args[i++] = KBD_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_keymap_toggle = NULL;
+        char *vc_font = NULL;
+        char *vc_font_map = NULL;
+        char *vc_font_unimap = NULL;
+#ifdef TARGET_GENTOO
+        char *vc_unicode = NULL;
+#endif
+#if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
+        char *vc_keytable = NULL;
+#endif
+        int fd = -1;
+        bool utf8;
+        int r = EXIT_FAILURE;
+        pid_t font_pid = 0, keymap_pid = 0;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+
+        if (argv[1])
+                vc = argv[1];
+        else
+                vc = "/dev/tty0";
+
+        if ((fd = open_terminal(vc, O_RDWR|O_CLOEXEC)) < 0) {
+                log_error("Failed to open %s: %m", vc);
+                goto finish;
+        }
+
+        if (!is_vconsole(fd)) {
+                log_error("Device %s is not a virtual console.", vc);
+                goto finish;
+        }
+
+        utf8 = is_locale_utf8();
+
+        vc_keymap = strdup("us");
+        vc_font = strdup(DEFAULT_FONT);
+
+        if (!vc_keymap || !vc_font) {
+                log_error("Failed to allocate strings.");
+                goto finish;
+        }
+
+        r = 0;
+
+        if (detect_container(NULL) <= 0)
+                if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
+                                        "vconsole.keymap", &vc_keymap,
+                                        "vconsole.keymap.toggle", &vc_keymap_toggle,
+                                        "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));
+                }
+
+        /* Hmm, nothing set on the kernel cmd line? Then let's
+         * try /etc/vconsole.conf */
+        if (r <= 0 &&
+            (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
+                                "KEYMAP", &vc_keymap,
+                                "KEYMAP_TOGGLE", &vc_keymap_toggle,
+                                "FONT", &vc_font,
+                                "FONT_MAP", &vc_font_map,
+                                "FONT_UNIMAP", &vc_font_unimap,
+                                NULL)) < 0) {
+
+                if (r != -ENOENT)
+                        log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
+        }
+
+        if (r <= 0) {
+#if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
+                if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
+                                        "SYSFONT", &vc_font,
+                                        "SYSFONTACM", &vc_font_map,
+                                        "UNIMAP", &vc_font_unimap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
+                }
+
+                if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
+                                        "KEYTABLE", &vc_keymap,
+                                        "KEYMAP", &vc_keymap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
+                }
+
+                if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
+                        char *t;
+
+                        if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
+                                log_error("Out of memory.");
+                                goto finish;
+                        }
+
+                        free(vc_keymap);
+                        vc_keymap = t;
+                }
+
+#elif defined(TARGET_SUSE)
+                if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
+                                        "KEYTABLE", &vc_keymap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
+                }
+
+                if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
+                                        "CONSOLE_FONT", &vc_font,
+                                        "CONSOLE_SCREENMAP", &vc_font_map,
+                                        "CONSOLE_UNICODEMAP", &vc_font_unimap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
+                }
+
+#elif defined(TARGET_ARCH)
+                if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
+                                        "KEYMAP", &vc_keymap,
+                                        "CONSOLEFONT", &vc_font,
+                                        "CONSOLEMAP", &vc_font_map,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
+                }
+
+#elif defined(TARGET_FRUGALWARE)
+                if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
+                                        "keymap", &vc_keymap,
+                                        NULL)) < 0) {
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
+                }
+                if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
+                                        "font", &vc_font,
+                                        NULL)) < 0) {
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
+                }
+
+#elif defined(TARGET_ALTLINUX)
+                if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
+                                        "KEYTABLE", &vc_keymap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
+                }
+
+                if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
+                                        "SYSFONT", &vc_font,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
+                }
+
+#elif defined(TARGET_GENTOO)
+                if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
+                                        "unicode", &vc_unicode,
+                                        NULL)) < 0) {
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
+                }
+
+                if (vc_unicode) {
+                        int rc_unicode;
+
+                        if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
+                                log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
+                        else {
+                                if (rc_unicode && !utf8)
+                                        log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
+                                else if (!rc_unicode && utf8) {
+                                        log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
+                                        utf8 = false;
+                                }
+                        }
+                }
+
+                /* /etc/conf.d/consolefont comments and gentoo
+                 * documentation mention uppercase, but the actual
+                 * contents are lowercase.  the existing
+                 * /etc/init.d/consolefont tries both
+                 */
+                if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
+                                        "CONSOLEFONT", &vc_font,
+                                        "consolefont", &vc_font,
+                                        "consoletranslation", &vc_font_map,
+                                        "CONSOLETRANSLATION", &vc_font_map,
+                                        "unicodemap", &vc_font_unimap,
+                                        "UNICODEMAP", &vc_font_unimap,
+                                        NULL)) < 0) {
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
+                }
+
+                if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
+                                        "keymap", &vc_keymap,
+                                        "KEYMAP", &vc_keymap,
+                                        NULL)) < 0) {
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
+                }
+
+#elif defined(TARGET_MANDRIVA) || defined (TARGET_MAGEIA)
+
+                if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
+                                        "SYSFONT", &vc_font,
+                                        "SYSFONTACM", &vc_font_map,
+                                        "UNIMAP", &vc_font_unimap,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
+                }
+
+                if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
+                                        "KEYTABLE", &vc_keytable,
+                                        "KEYMAP", &vc_keymap,
+                                        "UNIKEYTABLE", &vc_keymap,
+                                        "GRP_TOGGLE", &vc_keymap_toggle,
+                                        NULL)) < 0) {
+
+                        if (r != -ENOENT)
+                                log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
+                }
+
+                if (vc_keytable) {
+                        if (vc_keymap)
+                                free(vc_keymap);
+                        if (utf8) {
+                                if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
+                                        vc_keymap = strdup(vc_keytable);
+                                else {
+                                        char *s;
+                                        if ((s = strstr(vc_keytable, ".map")))
+                                                vc_keytable[s-vc_keytable+1] = '\0';
+                                        vc_keymap = strappend(vc_keytable, ".uni");
+                                }
+                        } else
+                                vc_keymap = strdup(vc_keytable);
+
+                        free(vc_keytable);
+
+                        if (!vc_keymap) {
+                                log_error("Out of memory.");
+                                goto finish;
+                        }
+                }
+
+                if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
+                        char *t;
+
+                        if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
+                                log_error("Out of memory.");
+                                goto finish;
+                        }
+
+                        free(vc_keymap);
+                        vc_keymap = t;
+                }
+#endif
+        }
+
+        r = EXIT_FAILURE;
+
+        if (!utf8)
+                disable_utf8(fd);
+
+        if (load_keymap(vc, vc_keymap, vc_keymap_toggle, 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(KBD_LOADKEYS, keymap_pid);
+
+        if (font_pid > 0)
+                wait_for_terminate_and_warn(KBD_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;
+}