| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include <errno.h> |
| #include <stdio_ext.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "dropin.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "fstab-util.h" |
| #include "generator.h" |
| #include "log.h" |
| #include "macro.h" |
| #include "mkdir.h" |
| #include "path-util.h" |
| #include "special.h" |
| #include "specifier.h" |
| #include "string-util.h" |
| #include "time-util.h" |
| #include "unit-name.h" |
| #include "util.h" |
| |
| int generator_open_unit_file( |
| const char *dest, |
| const char *source, |
| const char *name, |
| FILE **file) { |
| |
| const char *unit; |
| FILE *f; |
| |
| unit = strjoina(dest, "/", name); |
| |
| f = fopen(unit, "wxe"); |
| if (!f) { |
| if (source && errno == EEXIST) |
| return log_error_errno(errno, |
| "Failed to create unit file %s, as it already exists. Duplicate entry in %s?", |
| unit, source); |
| else |
| return log_error_errno(errno, |
| "Failed to create unit file %s: %m", |
| unit); |
| } |
| |
| (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
| |
| fprintf(f, |
| "# Automatically generated by %s\n\n", |
| program_invocation_short_name); |
| |
| *file = f; |
| return 0; |
| } |
| |
| int generator_add_symlink(const char *root, const char *dst, const char *dep_type, const char *src) { |
| /* Adds a symlink from <dst>.<dep_type>.d/ to ../<src> */ |
| |
| const char *from, *to; |
| |
| from = strjoina("../", src); |
| to = strjoina(root, "/", dst, ".", dep_type, "/", src); |
| |
| mkdir_parents_label(to, 0755); |
| if (symlink(from, to) < 0) |
| if (errno != EEXIST) |
| return log_error_errno(errno, "Failed to create symlink \"%s\": %m", to); |
| |
| return 0; |
| } |
| |
| static int write_fsck_sysroot_service(const char *dir, const char *what) { |
| _cleanup_free_ char *device = NULL, *escaped = NULL, *escaped2 = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *unit; |
| int r; |
| |
| escaped = specifier_escape(what); |
| if (!escaped) |
| return log_oom(); |
| |
| escaped2 = cescape(escaped); |
| if (!escaped2) |
| return log_oom(); |
| |
| unit = strjoina(dir, "/systemd-fsck-root.service"); |
| log_debug("Creating %s", unit); |
| |
| r = unit_name_from_path(what, ".device", &device); |
| if (r < 0) |
| return log_error_errno(r, "Failed to convert device \"%s\" to unit name: %m", what); |
| |
| f = fopen(unit, "wxe"); |
| if (!f) |
| return log_error_errno(errno, "Failed to create unit file %s: %m", unit); |
| |
| fprintf(f, |
| "# Automatically generated by %1$s\n\n" |
| "[Unit]\n" |
| "Description=File System Check on %2$s\n" |
| "Documentation=man:systemd-fsck-root.service(8)\n" |
| "DefaultDependencies=no\n" |
| "BindsTo=%3$s\n" |
| "Conflicts=shutdown.target\n" |
| "After=initrd-root-device.target local-fs-pre.target %3$s\n" |
| "Before=shutdown.target\n" |
| "\n" |
| "[Service]\n" |
| "Type=oneshot\n" |
| "RemainAfterExit=yes\n" |
| "ExecStart=" SYSTEMD_FSCK_PATH " %4$s\n" |
| "TimeoutSec=0\n", |
| program_invocation_short_name, |
| escaped, |
| device, |
| escaped2); |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write unit file %s: %m", unit); |
| |
| return 0; |
| } |
| |
| int generator_write_fsck_deps( |
| FILE *f, |
| const char *dir, |
| const char *what, |
| const char *where, |
| const char *fstype) { |
| |
| int r; |
| |
| assert(f); |
| assert(dir); |
| assert(what); |
| assert(where); |
| |
| if (!is_device_path(what)) { |
| log_warning("Checking was requested for \"%s\", but it is not a device.", what); |
| return 0; |
| } |
| |
| if (!isempty(fstype) && !streq(fstype, "auto")) { |
| r = fsck_exists(fstype); |
| if (r < 0) |
| log_warning_errno(r, "Checking was requested for %s, but couldn't detect if fsck.%s may be used, proceeding: %m", what, fstype); |
| else if (r == 0) { |
| /* treat missing check as essentially OK */ |
| log_debug("Checking was requested for %s, but fsck.%s does not exist.", what, fstype); |
| return 0; |
| } |
| } |
| |
| if (path_equal(where, "/")) { |
| const char *lnk; |
| |
| lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service"); |
| |
| mkdir_parents(lnk, 0755); |
| if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0) |
| return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); |
| |
| } else { |
| _cleanup_free_ char *_fsck = NULL; |
| const char *fsck; |
| |
| if (in_initrd() && path_equal(where, "/sysroot")) { |
| r = write_fsck_sysroot_service(dir, what); |
| if (r < 0) |
| return r; |
| |
| fsck = "systemd-fsck-root.service"; |
| } else { |
| r = unit_name_from_path_instance("systemd-fsck", what, ".service", &_fsck); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create fsck service name: %m"); |
| |
| fsck = _fsck; |
| } |
| |
| fprintf(f, |
| "Requires=%1$s\n" |
| "After=%1$s\n", |
| fsck); |
| } |
| |
| return 0; |
| } |
| |
| int generator_write_timeouts( |
| const char *dir, |
| const char *what, |
| const char *where, |
| const char *opts, |
| char **filtered) { |
| |
| /* Allow configuration how long we wait for a device that |
| * backs a mount point to show up. This is useful to support |
| * endless device timeouts for devices that show up only after |
| * user input, like crypto devices. */ |
| |
| _cleanup_free_ char *node = NULL, *unit = NULL, *timeout = NULL; |
| usec_t u; |
| int r; |
| |
| r = fstab_filter_options(opts, "comment=systemd.device-timeout\0" |
| "x-systemd.device-timeout\0", |
| NULL, &timeout, filtered); |
| if (r <= 0) |
| return r; |
| |
| r = parse_sec_fix_0(timeout, &u); |
| if (r < 0) { |
| log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); |
| return 0; |
| } |
| |
| node = fstab_node_to_udev_node(what); |
| if (!node) |
| return log_oom(); |
| if (!is_device_path(node)) { |
| log_warning("x-systemd.device-timeout ignored for %s", what); |
| return 0; |
| } |
| |
| r = unit_name_from_path(node, ".device", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path: %m"); |
| |
| return write_drop_in_format(dir, unit, 50, "device-timeout", |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "JobRunningTimeoutSec=%s", |
| program_invocation_short_name, |
| timeout); |
| } |
| |
| int generator_write_device_deps( |
| const char *dir, |
| const char *what, |
| const char *where, |
| const char *opts) { |
| |
| /* fstab records that specify _netdev option should apply the network |
| * ordering on the actual device depending on network connection. If we |
| * are not mounting real device (NFS, CIFS), we rely on _netdev effect |
| * on the mount unit itself. */ |
| |
| _cleanup_free_ char *node = NULL, *unit = NULL; |
| int r; |
| |
| if (!fstab_test_option(opts, "_netdev\0")) |
| return 0; |
| |
| node = fstab_node_to_udev_node(what); |
| if (!node) |
| return log_oom(); |
| |
| /* Nothing to apply dependencies to. */ |
| if (!is_device_path(node)) |
| return 0; |
| |
| r = unit_name_from_path(node, ".device", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path \"%s\": %m", |
| node); |
| |
| /* See mount_add_default_dependencies for explanation why we create such |
| * dependencies. */ |
| return write_drop_in_format(dir, unit, 50, "netdev-dependencies", |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "After=" SPECIAL_NETWORK_ONLINE_TARGET " " SPECIAL_NETWORK_TARGET "\n" |
| "Wants=" SPECIAL_NETWORK_ONLINE_TARGET "\n", |
| program_invocation_short_name); |
| } |
| |
| int generator_write_initrd_root_device_deps(const char *dir, const char *what) { |
| _cleanup_free_ char *unit = NULL; |
| int r; |
| |
| r = unit_name_from_path(what, ".device", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path \"%s\": %m", |
| what); |
| |
| return write_drop_in_format(dir, SPECIAL_INITRD_ROOT_DEVICE_TARGET, 50, "root-device", |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "Requires=%s\n" |
| "After=%s", |
| program_invocation_short_name, |
| unit, |
| unit); |
| } |
| |
| int generator_hook_up_mkswap( |
| const char *dir, |
| const char *what) { |
| |
| _cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *unit_file; |
| int r; |
| |
| node = fstab_node_to_udev_node(what); |
| if (!node) |
| return log_oom(); |
| |
| /* Nothing to work on. */ |
| if (!is_device_path(node)) { |
| log_error("Cannot format something that is not a device node: %s", node); |
| return -EINVAL; |
| } |
| |
| r = unit_name_from_path_instance("systemd-mkswap", node, ".service", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m", |
| node); |
| |
| unit_file = strjoina(dir, "/", unit); |
| log_debug("Creating %s", unit_file); |
| |
| escaped = cescape(node); |
| if (!escaped) |
| return log_oom(); |
| |
| r = unit_name_from_path(what, ".swap", &where_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path \"%s\": %m", |
| what); |
| |
| f = fopen(unit_file, "wxe"); |
| if (!f) |
| return log_error_errno(errno, "Failed to create unit file %s: %m", |
| unit_file); |
| |
| fprintf(f, |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "Description=Make Swap on %%f\n" |
| "Documentation=man:systemd-mkswap@.service(8)\n" |
| "DefaultDependencies=no\n" |
| "BindsTo=%%i.device\n" |
| "Conflicts=shutdown.target\n" |
| "After=%%i.device\n" |
| "Before=shutdown.target %s\n" |
| "\n" |
| "[Service]\n" |
| "Type=oneshot\n" |
| "RemainAfterExit=yes\n" |
| "ExecStart="SYSTEMD_MAKEFS_PATH " swap %s\n" |
| "TimeoutSec=0\n", |
| program_invocation_short_name, |
| where_unit, |
| escaped); |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write unit file %s: %m", unit_file); |
| |
| return generator_add_symlink(dir, where_unit, "requires", unit); |
| } |
| |
| int generator_hook_up_mkfs( |
| const char *dir, |
| const char *what, |
| const char *where, |
| const char *type) { |
| |
| _cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *unit_file; |
| int r; |
| |
| node = fstab_node_to_udev_node(what); |
| if (!node) |
| return log_oom(); |
| |
| /* Nothing to work on. */ |
| if (!is_device_path(node)) { |
| log_error("Cannot format something that is not a device node: %s", node); |
| return -EINVAL; |
| } |
| |
| if (!type || streq(type, "auto")) { |
| log_error("Cannot format partition %s, filesystem type is not specified", node); |
| return -EINVAL; |
| } |
| |
| r = unit_name_from_path_instance("systemd-mkfs", node, ".service", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m", |
| node); |
| |
| unit_file = strjoina(dir, "/", unit); |
| log_debug("Creating %s", unit_file); |
| |
| escaped = cescape(node); |
| if (!escaped) |
| return log_oom(); |
| |
| r = unit_name_from_path(where, ".mount", &where_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path \"%s\": %m", |
| where); |
| |
| f = fopen(unit_file, "wxe"); |
| if (!f) |
| return log_error_errno(errno, "Failed to create unit file %s: %m", |
| unit_file); |
| |
| fprintf(f, |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "Description=Make File System on %%f\n" |
| "Documentation=man:systemd-mkfs@.service(8)\n" |
| "DefaultDependencies=no\n" |
| "BindsTo=%%i.device\n" |
| "Conflicts=shutdown.target\n" |
| "After=%%i.device\n" |
| /* fsck might or might not be used, so let's be safe and order |
| * ourselves before both systemd-fsck@.service and the mount unit. */ |
| "Before=shutdown.target systemd-fsck@%%i.service %s\n" |
| "\n" |
| "[Service]\n" |
| "Type=oneshot\n" |
| "RemainAfterExit=yes\n" |
| "ExecStart="SYSTEMD_MAKEFS_PATH " %s %s\n" |
| "TimeoutSec=0\n", |
| program_invocation_short_name, |
| where_unit, |
| type, |
| escaped); |
| // XXX: what about local-fs-pre.target? |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write unit file %s: %m", unit_file); |
| |
| return generator_add_symlink(dir, where_unit, "requires", unit); |
| } |
| |
| int generator_hook_up_growfs( |
| const char *dir, |
| const char *where, |
| const char *target) { |
| |
| _cleanup_free_ char *unit = NULL, *escaped = NULL, *where_unit = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *unit_file; |
| int r; |
| |
| escaped = cescape(where); |
| if (!escaped) |
| return log_oom(); |
| |
| r = unit_name_from_path_instance("systemd-growfs", where, ".service", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m", |
| where); |
| |
| r = unit_name_from_path(where, ".mount", &where_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to make unit name from path \"%s\": %m", |
| where); |
| |
| unit_file = strjoina(dir, "/", unit); |
| log_debug("Creating %s", unit_file); |
| |
| f = fopen(unit_file, "wxe"); |
| if (!f) |
| return log_error_errno(errno, "Failed to create unit file %s: %m", |
| unit_file); |
| |
| fprintf(f, |
| "# Automatically generated by %s\n\n" |
| "[Unit]\n" |
| "Description=Grow File System on %%f\n" |
| "Documentation=man:systemd-growfs@.service(8)\n" |
| "DefaultDependencies=no\n" |
| "BindsTo=%%i.mount\n" |
| "Conflicts=shutdown.target\n" |
| "After=%%i.mount\n" |
| "Before=shutdown.target %s\n" |
| "\n" |
| "[Service]\n" |
| "Type=oneshot\n" |
| "RemainAfterExit=yes\n" |
| "ExecStart="SYSTEMD_GROWFS_PATH " %s\n" |
| "TimeoutSec=0\n", |
| program_invocation_short_name, |
| target, |
| escaped); |
| |
| return generator_add_symlink(dir, where_unit, "wants", unit); |
| } |