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Diffstat (limited to 'src/libsystemd-shared/src/generator.c')
| -rw-r--r-- | src/libsystemd-shared/src/generator.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/src/libsystemd-shared/src/generator.c b/src/libsystemd-shared/src/generator.c new file mode 100644 index 0000000000..c720094cde --- /dev/null +++ b/src/libsystemd-shared/src/generator.c @@ -0,0 +1,207 @@ +/*** + This file is part of systemd. + + Copyright 2014 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 <errno.h> +#include <unistd.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/log.h" +#include "systemd-basic/macro.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/time-util.h" +#include "systemd-basic/unit-name.h" +#include "systemd-basic/util.h" +#include "systemd-shared/dropin.h" +#include "systemd-shared/fstab-util.h" +#include "systemd-shared/generator.h" + +static int write_fsck_sysroot_service(const char *dir, const char *what) { + _cleanup_free_ char *device = NULL, *escaped = NULL; + _cleanup_fclose_ FILE *f = NULL; + const char *unit; + int r; + + escaped = cescape(what); + if (!escaped) + 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$s\n\n" + "[Unit]\n" + "Documentation=man:systemd-fsck-root.service(8)\n" + "Description=File System Check on %2$s\n" + "DefaultDependencies=no\n" + "BindsTo=%3$s\n" + "After=initrd-root-device.target local-fs-pre.target\n" + "Before=shutdown.target\n" + "\n" + "[Service]\n" + "Type=oneshot\n" + "RemainAfterExit=yes\n" + "ExecStart=" SYSTEMD_FSCK_PATH " %4$s\n" + "TimeoutSec=0\n", + program_invocation_short_name, + what, + device, + escaped); + + 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(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(); + + 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]\nJobTimeoutSec=%s", + program_invocation_short_name, timeout); +} + +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: %m"); + + return write_drop_in_format(dir, SPECIAL_INITRD_ROOT_DEVICE_TARGET, 50, "root-device", + "# Automatically generated by %s\n\n" + "[Unit]\nRequires=%s\nAfter=%s", + program_invocation_short_name, unit, unit); +} |