+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdio.h>
-#include <mntent.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "log.h"
-#include "util.h"
-#include "unit-name.h"
-#include "path-util.h"
-#include "fstab-util.h"
-#include "mount-setup.h"
-#include "special.h"
-#include "mkdir.h"
-#include "generator.h"
-#include "strv.h"
-#include "virt.h"
-
-static const char *arg_dest = "/tmp";
-static bool arg_fstab_enabled = true;
-static char *arg_root_what = NULL;
-static char *arg_root_fstype = NULL;
-static char *arg_root_options = NULL;
-static int arg_root_rw = -1;
-static char *arg_usr_what = NULL;
-static char *arg_usr_fstype = NULL;
-static char *arg_usr_options = NULL;
-
-static int add_swap(
- const char *what,
- struct mntent *me,
- bool noauto,
- bool nofail) {
-
- _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL, *filtered = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- int r, pri = -1;
- const char *opts;
-
- assert(what);
- assert(me);
-
- if (access("/proc/swaps", F_OK) < 0) {
- log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
- return 0;
- }
-
- if (detect_container(NULL) > 0) {
- log_info("Running in a container, ignoring fstab swap entry for %s.", what);
- return 0;
- }
-
- opts = me->mnt_opts;
- r = fstab_find_pri(opts, &pri);
- if (r < 0) {
- log_error_errno(r, "Failed to parse priority, ignoring: %m");
-
- /* Remove invalid pri field */
- r = fstab_filter_options(opts, "pri\0", NULL, NULL, &filtered);
- if (r < 0)
- return log_error_errno(r, "Failed to parse options: %m");
- opts = filtered;
- }
-
- name = unit_name_from_path(what, ".swap");
- if (!name)
- return log_oom();
-
- unit = strjoin(arg_dest, "/", name, NULL);
- if (!unit)
- return log_oom();
-
- f = fopen(unit, "wxe");
- if (!f) {
- if (errno == EEXIST)
- log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
- else
- log_error_errno(errno, "Failed to create unit file %s: %m", unit);
- return -errno;
- }
-
- fprintf(f,
- "# Automatically generated by systemd-fstab-generator\n\n"
- "[Unit]\n"
- "SourcePath=/etc/fstab\n"
- "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
- "[Swap]\n"
- "What=%s\n",
- what);
-
- /* Note that we currently pass the priority field twice, once
- * in Priority=, and once in Options= */
- if (pri >= 0)
- fprintf(f, "Priority=%i\n", pri);
-
- if (!isempty(opts) && !streq(opts, "defaults"))
- fprintf(f, "Options=%s\n", opts);
-
- r = fflush_and_check(f);
- if (r < 0)
- return log_error_errno(r, "Failed to write unit file %s: %m", unit);
-
- /* use what as where, to have a nicer error message */
- r = generator_write_timeouts(arg_dest, what, what, opts, NULL);
- if (r < 0)
- return r;
-
- if (!noauto) {
- lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
- nofail ? ".wants/" : ".requires/", name, NULL);
- if (!lnk)
- return log_oom();
-
- mkdir_parents_label(lnk, 0755);
- if (symlink(unit, lnk) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
- }
-
- return 0;
-}
-
-static bool mount_is_network(struct mntent *me) {
- assert(me);
-
- return fstab_test_option(me->mnt_opts, "_netdev\0") ||
- fstype_is_network(me->mnt_type);
-}
-
-static bool mount_in_initrd(struct mntent *me) {
- assert(me);
-
- return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") ||
- streq(me->mnt_dir, "/usr");
-}
-
-static int add_mount(
- const char *what,
- const char *where,
- const char *fstype,
- const char *opts,
- int passno,
- bool noauto,
- bool nofail,
- bool automount,
- const char *post,
- const char *source) {
-
- _cleanup_free_ char
- *name = NULL, *unit = NULL, *lnk = NULL,
- *automount_name = NULL, *automount_unit = NULL,
- *filtered = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- int r;
-
- assert(what);
- assert(where);
- assert(opts);
- assert(source);
-
- if (streq_ptr(fstype, "autofs"))
- return 0;
-
- if (!is_path(where)) {
- log_warning("Mount point %s is not a valid path, ignoring.", where);
- return 0;
- }
-
- if (mount_point_is_api(where) ||
- mount_point_ignore(where))
- return 0;
-
- if (path_equal(where, "/")) {
- /* The root disk is not an option */
- automount = false;
- noauto = false;
- nofail = false;
- }
-
- name = unit_name_from_path(where, ".mount");
- if (!name)
- return log_oom();
-
- unit = strjoin(arg_dest, "/", name, NULL);
- if (!unit)
- return log_oom();
-
- f = fopen(unit, "wxe");
- if (!f) {
- if (errno == EEXIST)
- log_error("Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
- else
- log_error_errno(errno, "Failed to create unit file %s: %m", unit);
- return -errno;
- }
-
- fprintf(f,
- "# Automatically generated by systemd-fstab-generator\n\n"
- "[Unit]\n"
- "SourcePath=%s\n"
- "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
- source);
-
- if (post && !noauto && !nofail && !automount)
- fprintf(f, "Before=%s\n", post);
-
- if (passno != 0) {
- r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
- if (r < 0)
- return r;
- }
-
- fprintf(f,
- "\n"
- "[Mount]\n"
- "What=%s\n"
- "Where=%s\n",
- what,
- where);
-
- if (!isempty(fstype) && !streq(fstype, "auto"))
- fprintf(f, "Type=%s\n", fstype);
-
- r = generator_write_timeouts(arg_dest, what, where, opts, &filtered);
- if (r < 0)
- return r;
-
- if (!isempty(filtered) && !streq(filtered, "defaults"))
- fprintf(f, "Options=%s\n", filtered);
-
- fflush(f);
- if (ferror(f))
- return log_error_errno(errno, "Failed to write unit file %s: %m", unit);
-
- if (!noauto && post) {
- lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
- if (!lnk)
- return log_oom();
-
- mkdir_parents_label(lnk, 0755);
- if (symlink(unit, lnk) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
- }
-
- if (automount) {
- automount_name = unit_name_from_path(where, ".automount");
- if (!automount_name)
- return log_oom();
-
- automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
- if (!automount_unit)
- return log_oom();
-
- fclose(f);
- f = fopen(automount_unit, "wxe");
- if (!f)
- return log_error_errno(errno, "Failed to create unit file %s: %m", automount_unit);
-
- fprintf(f,
- "# Automatically generated by systemd-fstab-generator\n\n"
- "[Unit]\n"
- "SourcePath=%s\n"
- "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
- source);
-
- if (post)
- fprintf(f,
- "Before=%s\n",
- post);
-
- fprintf(f,
- "[Automount]\n"
- "Where=%s\n",
- where);
-
- fflush(f);
- if (ferror(f))
- return log_error_errno(errno, "Failed to write unit file %s: %m", automount_unit);
-
- free(lnk);
- lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
- if (!lnk)
- return log_oom();
-
- mkdir_parents_label(lnk, 0755);
- if (symlink(automount_unit, lnk) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
- }
-
- return 0;
-}
-
-static int parse_fstab(bool initrd) {
- _cleanup_endmntent_ FILE *f = NULL;
- const char *fstab_path;
- struct mntent *me;
- int r = 0;
-
- fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab";
- f = setmntent(fstab_path, "re");
- if (!f) {
- if (errno == ENOENT)
- return 0;
-
- log_error_errno(errno, "Failed to open %s: %m", fstab_path);
- return -errno;
- }
-
- while ((me = getmntent(f))) {
- _cleanup_free_ char *where = NULL, *what = NULL;
- bool noauto, nofail;
- int k;
-
- if (initrd && !mount_in_initrd(me))
- continue;
-
- what = fstab_node_to_udev_node(me->mnt_fsname);
- if (!what)
- return log_oom();
-
- if (is_device_path(what) && path_is_read_only_fs("sys") > 0) {
- log_info("Running in a container, ignoring fstab device entry for %s.", what);
- continue;
- }
-
- where = initrd ? strappend("/sysroot/", me->mnt_dir) : strdup(me->mnt_dir);
- if (!where)
- return log_oom();
-
- if (is_path(where))
- path_kill_slashes(where);
-
- noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0");
- nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0");
- log_debug("Found entry what=%s where=%s type=%s nofail=%s noauto=%s",
- what, where, me->mnt_type,
- yes_no(noauto), yes_no(nofail));
-
- if (streq(me->mnt_type, "swap"))
- k = add_swap(what, me, noauto, nofail);
- else {
- bool automount;
- const char *post;
-
- automount = fstab_test_option(me->mnt_opts,
- "comment=systemd.automount\0"
- "x-systemd.automount\0");
- if (initrd)
- post = SPECIAL_INITRD_FS_TARGET;
- else if (mount_in_initrd(me))
- post = SPECIAL_INITRD_ROOT_FS_TARGET;
- else if (mount_is_network(me))
- post = SPECIAL_REMOTE_FS_TARGET;
- else
- post = SPECIAL_LOCAL_FS_TARGET;
-
- k = add_mount(what,
- where,
- me->mnt_type,
- me->mnt_opts,
- me->mnt_passno,
- noauto,
- nofail,
- automount,
- post,
- fstab_path);
- }
-
- if (k < 0)
- r = k;
- }
-
- return r;
-}
-
-static int add_root_mount(void) {
- _cleanup_free_ char *what = NULL;
- const char *opts;
-
- if (isempty(arg_root_what)) {
- log_debug("Could not find a root= entry on the kernel command line.");
- return 0;
- }
-
- what = fstab_node_to_udev_node(arg_root_what);
- if (!what)
- log_oom();
-
- if (!arg_root_options)
- opts = arg_root_rw > 0 ? "rw" : "ro";
- else if (arg_root_rw >= 0 ||
- !fstab_test_option(arg_root_options, "ro\0" "rw\0"))
- opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro");
- else
- opts = arg_root_options;
-
- log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
- return add_mount(what,
- "/sysroot",
- arg_root_fstype,
- opts,
- is_device_path(what) ? 1 : 0,
- false,
- false,
- false,
- SPECIAL_INITRD_ROOT_FS_TARGET,
- "/proc/cmdline");
-}
-
-static int add_usr_mount(void) {
- _cleanup_free_ char *what = NULL;
- const char *opts;
-
- if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options)
- return 0;
-
- if (arg_root_what && !arg_usr_what) {
- arg_usr_what = strdup(arg_root_what);
-
- if (!arg_usr_what)
- return log_oom();
- }
-
- if (arg_root_fstype && !arg_usr_fstype) {
- arg_usr_fstype = strdup(arg_root_fstype);
-
- if (!arg_usr_fstype)
- return log_oom();
- }
-
- if (arg_root_options && !arg_usr_options) {
- arg_usr_options = strdup(arg_root_options);
-
- if (!arg_usr_options)
- return log_oom();
- }
-
- if (!arg_usr_what)
- return 0;
-
- what = fstab_node_to_udev_node(arg_usr_what);
- if (!path_is_absolute(what)) {
- log_debug("Skipping entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype));
- return -1;
- }
-
- if (!arg_usr_options)
- opts = arg_root_rw > 0 ? "rw" : "ro";
- else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0"))
- opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro");
- else
- opts = arg_usr_options;
-
- log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype));
- return add_mount(what,
- "/sysroot/usr",
- arg_usr_fstype,
- opts,
- 1,
- false,
- false,
- false,
- SPECIAL_INITRD_ROOT_FS_TARGET,
- "/proc/cmdline");
-}
-
-static int parse_proc_cmdline_item(const char *key, const char *value) {
- int r;
-
- /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last
- * instance should take precedence. In the case of multiple rootflags=
- * or usrflags= the arguments should be concatenated */
-
- if (STR_IN_SET(key, "fstab", "rd.fstab") && value) {
-
- r = parse_boolean(value);
- if (r < 0)
- log_warning("Failed to parse fstab switch %s. Ignoring.", value);
- else
- arg_fstab_enabled = r;
-
- } else if (streq(key, "root") && value) {
-
- if (free_and_strdup(&arg_root_what, value) < 0)
- return log_oom();
-
- } else if (streq(key, "rootfstype") && value) {
-
- if (free_and_strdup(&arg_root_fstype, value) < 0)
- return log_oom();
-
- } else if (streq(key, "rootflags") && value) {
- char *o;
-
- o = arg_root_options ?
- strjoin(arg_root_options, ",", value, NULL) :
- strdup(value);
- if (!o)
- return log_oom();
-
- free(arg_root_options);
- arg_root_options = o;
-
- } else if (streq(key, "mount.usr") && value) {
-
- if (free_and_strdup(&arg_usr_what, value) < 0)
- return log_oom();
-
- } else if (streq(key, "mount.usrfstype") && value) {
-
- if (free_and_strdup(&arg_usr_fstype, value) < 0)
- return log_oom();
-
- } else if (streq(key, "mount.usrflags") && value) {
- char *o;
-
- o = arg_usr_options ?
- strjoin(arg_usr_options, ",", value, NULL) :
- strdup(value);
- if (!o)
- return log_oom();
-
- free(arg_usr_options);
- arg_usr_options = o;
-
- } else if (streq(key, "rw") && !value)
- arg_root_rw = true;
- else if (streq(key, "ro") && !value)
- arg_root_rw = false;
-
- return 0;
-}
-
-int main(int argc, char *argv[]) {
- int r = 0;
-
- if (argc > 1 && argc != 4) {
- log_error("This program takes three or no arguments.");
- return EXIT_FAILURE;
- }
-
- if (argc > 1)
- arg_dest = argv[1];
-
- log_set_target(LOG_TARGET_SAFE);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- r = parse_proc_cmdline(parse_proc_cmdline_item);
- if (r < 0)
- log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
-
- /* Always honour root= and usr= in the kernel command line if we are in an initrd */
- if (in_initrd()) {
- r = add_root_mount();
- if (r == 0)
- r = add_usr_mount();
- }
-
- /* Honour /etc/fstab only when that's enabled */
- if (arg_fstab_enabled) {
- int k;
-
- log_debug("Parsing /etc/fstab");
-
- /* Parse the local /etc/fstab, possibly from the initrd */
- k = parse_fstab(false);
- if (k < 0)
- r = k;
-
- /* If running in the initrd also parse the /etc/fstab from the host */
- if (in_initrd()) {
- log_debug("Parsing /sysroot/etc/fstab");
-
- k = parse_fstab(true);
- if (k < 0)
- r = k;
- }
- }
-
- free(arg_root_what);
- free(arg_root_fstype);
- free(arg_root_options);
-
- free(arg_usr_what);
- free(arg_usr_fstype);
- free(arg_usr_options);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / commitdiff