X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Finstall.c;h=f57b94d599daf574fd1d38898ef267f9ddbb7847;hp=560bb24a93762f3a866d6abfa531fbcffa68e174;hb=8f2665a463ffb2b822c1e3effdb292d2bddf72be;hpb=ba49b4a1a2497b9d3372d45ee1e43aec0c0d66f1 diff --git a/src/shared/install.c b/src/shared/install.c index 560bb24a9..f57b94d59 100644 --- a/src/shared/install.c +++ b/src/shared/install.c @@ -36,20 +36,17 @@ #include "install.h" #include "conf-parser.h" #include "conf-files.h" - -typedef struct { - char *name; - char *path; - - char **aliases; - char **wanted_by; -} InstallInfo; +#include "specifier.h" +#include "install-printf.h" +#include "special.h" typedef struct { Hashmap *will_install; Hashmap *have_installed; } InstallContext; +#define _cleanup_install_context_done_ _cleanup_(install_context_done) + static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) { assert(paths); assert(scope >= 0); @@ -58,8 +55,9 @@ static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) zero(*paths); return lookup_paths_init(paths, - scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER, - scope == UNIT_FILE_USER); + scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER, + scope == UNIT_FILE_USER, + NULL, NULL, NULL); } static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) { @@ -178,11 +176,9 @@ static int mark_symlink_for_removal( path_kill_slashes(n); - r = set_put(*remove_symlinks_to, n); - if (r < 0) { - free(n); + r = set_consume(*remove_symlinks_to, n); + if (r < 0) return r == -EEXIST ? 0 : r; - } return 0; } @@ -194,11 +190,11 @@ static int remove_marked_symlinks_fd( const char *config_path, bool *deleted, UnitFileChange **changes, - unsigned *n_changes) { + unsigned *n_changes, + char** files) { int r = 0; - DIR *d; - struct dirent buffer, *de; + _cleanup_closedir_ DIR *d = NULL; assert(remove_symlinks_to); assert(fd >= 0); @@ -215,10 +211,11 @@ static int remove_marked_symlinks_fd( rewinddir(d); for (;;) { - int k; + struct dirent *de; - k = readdir_r(d, &buffer, &de); - if (k != 0) { + errno = 0; + de = readdir(d); + if (!de && errno != 0) { r = -errno; break; } @@ -233,7 +230,7 @@ static int remove_marked_symlinks_fd( if (de->d_type == DT_DIR) { int nfd, q; - char *p; + _cleanup_free_ char *p = NULL; nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); if (nfd < 0) { @@ -248,32 +245,26 @@ static int remove_marked_symlinks_fd( p = path_make_absolute(de->d_name, path); if (!p) { close_nointr_nofail(nfd); - r = -ENOMEM; - break; + return -ENOMEM; } /* This will close nfd, regardless whether it succeeds or not */ - q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes); - free(p); + q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes, files); if (r == 0) r = q; } else if (de->d_type == DT_LNK) { - char *p, *dest; + _cleanup_free_ char *p = NULL, *dest = NULL; int q; bool found; p = path_make_absolute(de->d_name, path); - if (!p) { - r = -ENOMEM; - break; - } + if (!p) + return -ENOMEM; q = readlink_and_canonicalize(p, &dest); if (q < 0) { - free(p); - if (q == -ENOENT) continue; @@ -284,7 +275,10 @@ static int remove_marked_symlinks_fd( found = set_get(remove_symlinks_to, dest) || - set_get(remove_symlinks_to, path_get_file_name(dest)); + set_get(remove_symlinks_to, basename(dest)); + + if (unit_name_is_instance(p)) + found = found && strv_contains(files, basename(p)); if (found) { @@ -309,14 +303,9 @@ static int remove_marked_symlinks_fd( } } } - - free(p); - free(dest); } } - closedir(d); - return r; } @@ -324,7 +313,8 @@ static int remove_marked_symlinks( Set *remove_symlinks_to, const char *config_path, UnitFileChange **changes, - unsigned *n_changes) { + unsigned *n_changes, + char** files) { int fd, r = 0; bool deleted; @@ -349,7 +339,7 @@ static int remove_marked_symlinks( } /* This takes possession of cfd and closes it */ - q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes); + q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes, files); if (r == 0) r = q; } while (deleted); @@ -367,8 +357,7 @@ static int find_symlinks_fd( bool *same_name_link) { int r = 0; - DIR *d; - struct dirent buffer, *de; + _cleanup_closedir_ DIR *d = NULL; assert(name); assert(fd >= 0); @@ -383,16 +372,15 @@ static int find_symlinks_fd( } for (;;) { - int k; + struct dirent *de; - k = readdir_r(d, &buffer, &de); - if (k != 0) { - r = -errno; - break; - } + errno = 0; + de = readdir(d); + if (!de && errno != 0) + return -errno; if (!de) - break; + return r; if (ignore_file(de->d_name)) continue; @@ -401,7 +389,7 @@ static int find_symlinks_fd( if (de->d_type == DT_DIR) { int nfd, q; - char *p; + _cleanup_free_ char *p = NULL; nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); if (nfd < 0) { @@ -416,39 +404,31 @@ static int find_symlinks_fd( p = path_make_absolute(de->d_name, path); if (!p) { close_nointr_nofail(nfd); - r = -ENOMEM; - break; + return -ENOMEM; } /* This will close nfd, regardless whether it succeeds or not */ q = find_symlinks_fd(name, nfd, p, config_path, same_name_link); - free(p); - if (q > 0) { - r = 1; - break; - } + if (q > 0) + return 1; if (r == 0) r = q; } else if (de->d_type == DT_LNK) { - char *p, *dest; + _cleanup_free_ char *p = NULL, *dest = NULL; bool found_path, found_dest, b = false; int q; /* Acquire symlink name */ p = path_make_absolute(de->d_name, path); - if (!p) { - r = -ENOMEM; - break; - } + if (!p) + return -ENOMEM; /* Acquire symlink destination */ q = readlink_and_canonicalize(p, &dest); if (q < 0) { - free(p); - if (q == -ENOENT) continue; @@ -469,40 +449,26 @@ static int find_symlinks_fd( if (path_is_absolute(name)) found_dest = path_equal(dest, name); else - found_dest = streq(path_get_file_name(dest), name); - - free(dest); + found_dest = streq(basename(dest), name); if (found_path && found_dest) { - char *t; + _cleanup_free_ char *t = NULL; /* Filter out same name links in the main * config path */ t = path_make_absolute(name, config_path); - if (!t) { - free(p); - r = -ENOMEM; - break; - } + if (!t) + return -ENOMEM; b = path_equal(t, p); - free(t); } - free(p); - if (b) *same_name_link = true; - else if (found_path || found_dest) { - r = 1; - break; - } + else if (found_path || found_dest) + return 1; } } - - closedir(d); - - return r; } static int find_symlinks( @@ -517,8 +483,11 @@ static int find_symlinks( assert(same_name_link); fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); - if (fd < 0) + if (fd < 0) { + if (errno == ENOENT) + return 0; return -errno; + } /* This takes possession of fd and closes it */ return find_symlinks_fd(name, fd, config_path, config_path, same_name_link); @@ -531,7 +500,7 @@ static int find_symlinks_in_scope( UnitFileState *state) { int r; - char *path; + _cleanup_free_ char *path2 = NULL; bool same_name_link_runtime = false, same_name_link = false; assert(scope >= 0); @@ -539,6 +508,7 @@ static int find_symlinks_in_scope( assert(name); if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) { + _cleanup_free_ char *path = NULL; /* First look in runtime config path */ r = get_config_path(scope, true, root_dir, &path); @@ -546,8 +516,6 @@ static int find_symlinks_in_scope( return r; r = find_symlinks(name, path, &same_name_link_runtime); - free(path); - if (r < 0) return r; else if (r > 0) { @@ -557,13 +525,11 @@ static int find_symlinks_in_scope( } /* Then look in the normal config path */ - r = get_config_path(scope, false, root_dir, &path); + r = get_config_path(scope, false, root_dir, &path2); if (r < 0) return r; - r = find_symlinks(name, path, &same_name_link); - free(path); - + r = find_symlinks(name, path2, &same_name_link); if (r < 0) return r; else if (r > 0) { @@ -588,12 +554,13 @@ int unit_file_mask( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { - char **i, *prefix; + char **i; + _cleanup_free_ char *prefix; int r; assert(scope >= 0); @@ -604,9 +571,9 @@ int unit_file_mask( return r; STRV_FOREACH(i, files) { - char *path; + _cleanup_free_ char *path = NULL; - if (!unit_name_is_valid_no_type(*i, true)) { + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -621,16 +588,13 @@ int unit_file_mask( if (symlink("/dev/null", path) >= 0) { add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null"); - free(path); continue; } if (errno == EEXIST) { - if (null_or_empty_path(path) > 0) { - free(path); + if (null_or_empty_path(path) > 0) continue; - } if (force) { unlink(path); @@ -640,7 +604,6 @@ int unit_file_mask( add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null"); - free(path); continue; } } @@ -651,12 +614,8 @@ int unit_file_mask( if (r == 0) r = -errno; } - - free(path); } - free(prefix); - return r; } @@ -664,7 +623,7 @@ int unit_file_unmask( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, UnitFileChange **changes, unsigned *n_changes) { @@ -682,7 +641,7 @@ int unit_file_unmask( STRV_FOREACH(i, files) { char *path; - if (!unit_name_is_valid_no_type(*i, true)) { + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -715,7 +674,7 @@ int unit_file_unmask( finish: - q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); + q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files); if (r == 0) r = q; @@ -729,36 +688,36 @@ int unit_file_link( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { - LookupPaths paths; - char **i, *config_path = NULL; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + char **i; + _cleanup_free_ char *config_path = NULL; int r, q; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); - zero(paths); - r = lookup_paths_init_from_scope(&paths, scope); if (r < 0) return r; r = get_config_path(scope, runtime, root_dir, &config_path); if (r < 0) - goto finish; + return r; STRV_FOREACH(i, files) { - char *path, *fn; + _cleanup_free_ char *path = NULL; + char *fn; struct stat st; - fn = path_get_file_name(*i); + fn = basename(*i); if (!path_is_absolute(*i) || - !unit_name_is_valid_no_type(fn, true)) { + !unit_name_is_valid(fn, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -776,48 +735,34 @@ int unit_file_link( } q = in_search_path(*i, paths.unit_path); - if (q < 0) { - r = q; - break; - } + if (q < 0) + return q; if (q > 0) continue; path = path_make_absolute(fn, config_path); - if (!path) { - r = -ENOMEM; - break; - } + if (!path) + return -ENOMEM; if (symlink(*i, path) >= 0) { add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i); - - free(path); continue; } if (errno == EEXIST) { - char *dest = NULL; + _cleanup_free_ char *dest = NULL; q = readlink_and_make_absolute(path, &dest); if (q < 0 && errno != ENOENT) { - free(path); - if (r == 0) r = q; - continue; } - if (q >= 0 && path_equal(dest, *i)) { - free(dest); - free(path); + if (q >= 0 && path_equal(dest, *i)) continue; - } - - free(dest); if (force) { unlink(path); @@ -827,7 +772,6 @@ int unit_file_link( add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i); - free(path); continue; } } @@ -838,14 +782,8 @@ int unit_file_link( if (r == 0) r = -errno; } - - free(path); } - finish: - lookup_paths_free(&paths); - free(config_path); - return r; } @@ -883,6 +821,7 @@ static void install_info_free(InstallInfo *i) { free(i->path); strv_free(i->aliases); strv_free(i->wanted_by); + strv_free(i->required_by); free(i); } @@ -918,9 +857,9 @@ static int install_info_add( assert(name || path); if (!name) - name = path_get_file_name(path); + name = basename(path); - if (!unit_name_is_valid_no_type(name, true)) + if (!unit_name_is_valid(name, TEMPLATE_VALID)) return -EINVAL; if (hashmap_get(c->have_installed, name) || @@ -975,15 +914,16 @@ static int install_info_add_auto( return install_info_add(c, name_or_path, NULL); } -static int config_parse_also( - const char *filename, - unsigned line, - const char *section, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { +static int config_parse_also(const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { char *w; size_t l; @@ -995,7 +935,7 @@ static int config_parse_also( assert(rvalue); FOREACH_WORD_QUOTED(w, l, rvalue, state) { - char *n; + _cleanup_free_ char *n; int r; n = strndup(w, l); @@ -1003,17 +943,42 @@ static int config_parse_also( return -ENOMEM; r = install_info_add(c, n, NULL); - if (r < 0) { - free(n); + if (r < 0) return r; - } - - free(n); } return 0; } +static int config_parse_user(const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + InstallInfo *i = data; + char* printed; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + + r = install_full_printf(i, rvalue, &printed); + if (r < 0) + return r; + + free(i->user); + i->user = printed; + + return 0; +} + static int unit_file_load( InstallContext *c, InstallInfo *info, @@ -1021,14 +986,16 @@ static int unit_file_load( bool allow_symlink) { const ConfigTableItem items[] = { - { "Install", "Alias", config_parse_strv, 0, &info->aliases }, - { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by }, - { "Install", "Also", config_parse_also, 0, c }, + { "Install", "Alias", config_parse_strv, 0, &info->aliases }, + { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by }, + { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by }, + { "Install", "Also", config_parse_also, 0, c }, + { "Exec", "User", config_parse_user, 0, info }, { NULL, NULL, NULL, 0, NULL } }; int fd; - FILE *f; + _cleanup_fclose_ FILE *f = NULL; int r; assert(c); @@ -1045,12 +1012,15 @@ static int unit_file_load( return -ENOMEM; } - r = config_parse(path, f, NULL, config_item_table_lookup, (void*) items, true, info); - fclose(f); + r = config_parse(NULL, path, f, NULL, + config_item_table_lookup, (void*) items, true, true, info); if (r < 0) return r; - return strv_length(info->aliases) + strv_length(info->wanted_by); + return + (int) strv_length(info->aliases) + + (int) strv_length(info->wanted_by) + + (int) strv_length(info->required_by); } static int unit_file_search( @@ -1087,8 +1057,48 @@ static int unit_file_search( if (r >= 0) info->path = path; - else + else { + if (r == -ENOENT && unit_name_is_instance(info->name)) { + /* Unit file doesn't exist, however instance enablement was requested. + * We will check if it is possible to load template unit file. */ + char *template = NULL, + *template_path = NULL, + *template_dir = NULL; + + template = unit_name_template(info->name); + if (!template) { + free(path); + return -ENOMEM; + } + + /* We will reuse path variable since we don't need it anymore. */ + template_dir = path; + *(strrchr(path, '/') + 1) = '\0'; + + template_path = strjoin(template_dir, template, NULL); + if (!template_path) { + free(path); + free(template); + return -ENOMEM; + } + + /* Let's try to load template unit. */ + r = unit_file_load(c, info, template_path, allow_symlink); + if (r >= 0) { + info->path = strdup(template_path); + if (!info->path) { + free(path); + free(template); + free(template_path); + return -ENOMEM; + } + } + + free(template); + free(template_path); + } free(path); + } if (r != -ENOENT && r != -ELOOP) return r; @@ -1103,15 +1113,13 @@ static int unit_file_can_install( const char *name, bool allow_symlink) { - InstallContext c; + _cleanup_install_context_done_ InstallContext c = {}; InstallInfo *i; int r; assert(paths); assert(name); - zero(c); - r = install_info_add_auto(&c, name); if (r < 0) return r; @@ -1121,9 +1129,10 @@ static int unit_file_can_install( r = unit_file_search(&c, i, paths, root_dir, allow_symlink); if (r >= 0) - r = strv_length(i->aliases) + strv_length(i->wanted_by); - - install_context_done(&c); + r = + (int) strv_length(i->aliases) + + (int) strv_length(i->wanted_by) + + (int) strv_length(i->required_by); return r; } @@ -1135,13 +1144,13 @@ static int create_symlink( UnitFileChange **changes, unsigned *n_changes) { - char *dest; + _cleanup_free_ char *dest = NULL; int r; assert(old_path); assert(new_path); - mkdir_parents(new_path, 0755); + mkdir_parents_label(new_path, 0755); if (symlink(old_path, new_path) >= 0) { add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path); @@ -1155,12 +1164,8 @@ static int create_symlink( if (r < 0) return r; - if (path_equal(dest, old_path)) { - free(dest); + if (path_equal(dest, old_path)) return 0; - } - - free(dest); if (!force) return -EEXIST; @@ -1190,16 +1195,17 @@ static int install_info_symlink_alias( assert(config_path); STRV_FOREACH(s, i->aliases) { - char *alias_path; + _cleanup_free_ char *alias_path = NULL, *dst = NULL; - alias_path = path_make_absolute(*s, config_path); + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; + alias_path = path_make_absolute(dst, config_path); if (!alias_path) return -ENOMEM; q = create_symlink(i->path, alias_path, force, changes, n_changes); - free(alias_path); - if (r == 0) r = q; } @@ -1221,18 +1227,58 @@ static int install_info_symlink_wants( assert(config_path); STRV_FOREACH(s, i->wanted_by) { - char *path; + _cleanup_free_ char *path = NULL, *dst = NULL; + + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; - if (!unit_name_is_valid_no_type(*s, true)) { + if (!unit_name_is_valid(dst, TEMPLATE_VALID)) { r = -EINVAL; continue; } - if (asprintf(&path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) + if (asprintf(&path, "%s/%s.wants/%s", config_path, dst, i->name) < 0) + return -ENOMEM; + + q = create_symlink(i->path, path, force, changes, n_changes); + + if (r == 0) + r = q; + } + + return r; +} + +static int install_info_symlink_requires( + InstallInfo *i, + const char *config_path, + bool force, + UnitFileChange **changes, + unsigned *n_changes) { + + char **s; + int r = 0, q; + + assert(i); + assert(config_path); + + STRV_FOREACH(s, i->required_by) { + _cleanup_free_ char *path = NULL, *dst = NULL; + + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; + + if (!unit_name_is_valid(dst, TEMPLATE_VALID)) { + r = -EINVAL; + continue; + } + + if (asprintf(&path, "%s/%s.requires/%s", config_path, dst, i->name) < 0) return -ENOMEM; q = create_symlink(i->path, path, force, changes, n_changes); - free(path); if (r == 0) r = q; @@ -1250,7 +1296,7 @@ static int install_info_symlink_link( unsigned *n_changes) { int r; - char *path; + _cleanup_free_ char *path = NULL; assert(i); assert(paths); @@ -1265,8 +1311,6 @@ static int install_info_symlink_link( return -ENOMEM; r = create_symlink(i->path, path, force, changes, n_changes); - free(path); - return r; } @@ -1290,6 +1334,10 @@ static int install_info_apply( if (r == 0) r = q; + q = install_info_symlink_requires(i, config_path, force, changes, n_changes); + if (r == 0) + r = q; + q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes); if (r == 0) r = q; @@ -1363,7 +1411,9 @@ static int install_context_mark_for_removal( assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0); q = unit_file_search(c, i, paths, root_dir, false); - if (q < 0) { + if (q == -ENOENT) { + /* do nothing */ + } else if (q < 0) { if (r >= 0) r = q; @@ -1371,7 +1421,34 @@ static int install_context_mark_for_removal( } else if (r >= 0) r += q; - q = mark_symlink_for_removal(remove_symlinks_to, i->name); + if (unit_name_is_instance(i->name)) { + char *unit_file; + + if (i->path) { + unit_file = basename(i->path); + + if (unit_name_is_instance(unit_file)) + /* unit file named as instance exists, thus all symlinks + * pointing to it will be removed */ + q = mark_symlink_for_removal(remove_symlinks_to, i->name); + else + /* does not exist, thus we will mark for removal symlinks + * to template unit file */ + q = mark_symlink_for_removal(remove_symlinks_to, unit_file); + } else { + /* If i->path is not set, it means that we didn't actually find + * the unit file. But we can still remove symlinks to the + * nonexistent template. */ + unit_file = unit_name_template(i->name); + if (!unit_file) + return log_oom(); + + q = mark_symlink_for_removal(remove_symlinks_to, unit_file); + free(unit_file); + } + } else + q = mark_symlink_for_removal(remove_symlinks_to, i->name); + if (r >= 0 && q < 0) r = q; } @@ -1383,47 +1460,39 @@ int unit_file_enable( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { - LookupPaths paths; - InstallContext c; - char **i, *config_path = NULL; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + _cleanup_install_context_done_ InstallContext c = {}; + char **i; + _cleanup_free_ char *config_path = NULL; int r; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); - zero(paths); - zero(c); - r = lookup_paths_init_from_scope(&paths, scope); if (r < 0) return r; r = get_config_path(scope, runtime, root_dir, &config_path); if (r < 0) - goto finish; + return r; STRV_FOREACH(i, files) { r = install_info_add_auto(&c, *i); if (r < 0) - goto finish; + return r; } /* This will return the number of symlink rules that were supposed to be created, not the ones actually created. This is - useful to determine whether the passed files hat any + useful to determine whether the passed files had any installation data at all. */ r = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes); - -finish: - install_context_done(&c); - lookup_paths_free(&paths); - free(config_path); - return r; } @@ -1431,48 +1500,40 @@ int unit_file_disable( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, UnitFileChange **changes, unsigned *n_changes) { - LookupPaths paths; - InstallContext c; - char **i, *config_path = NULL; - Set *remove_symlinks_to = NULL; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + _cleanup_install_context_done_ InstallContext c = {}; + char **i; + _cleanup_free_ char *config_path = NULL; + _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; int r, q; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); - zero(paths); - zero(c); - r = lookup_paths_init_from_scope(&paths, scope); if (r < 0) return r; r = get_config_path(scope, runtime, root_dir, &config_path); if (r < 0) - goto finish; + return r; STRV_FOREACH(i, files) { r = install_info_add_auto(&c, *i); if (r < 0) - goto finish; + return r; } r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir); - q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); + q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files); if (r == 0) r = q; -finish: - install_context_done(&c); - lookup_paths_free(&paths); - set_free_free(remove_symlinks_to); - free(config_path); - return r; } @@ -1480,55 +1541,118 @@ int unit_file_reenable( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { + int r; - LookupPaths paths; - InstallContext c; - char **i, *config_path = NULL; - Set *remove_symlinks_to = NULL; - int r, q; + r = unit_file_disable(scope, runtime, root_dir, files, + changes, n_changes); + if (r < 0) + return r; + + return unit_file_enable(scope, runtime, root_dir, files, force, + changes, n_changes); +} + +int unit_file_set_default( + UnitFileScope scope, + const char *root_dir, + const char *file, + bool force, + UnitFileChange **changes, + unsigned *n_changes) { + + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + _cleanup_install_context_done_ InstallContext c = {}; + _cleanup_free_ char *config_path = NULL; + char *path; + int r; + InstallInfo *i = NULL; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); + assert(file); - zero(paths); - zero(c); + if (unit_name_to_type(file) != UNIT_TARGET) + return -EINVAL; r = lookup_paths_init_from_scope(&paths, scope); if (r < 0) return r; - r = get_config_path(scope, runtime, root_dir, &config_path); + r = get_config_path(scope, false, root_dir, &config_path); if (r < 0) - goto finish; + return r; - STRV_FOREACH(i, files) { - r = mark_symlink_for_removal(&remove_symlinks_to, *i); - if (r < 0) - goto finish; + r = install_info_add_auto(&c, file); + if (r < 0) + return r; - r = install_info_add_auto(&c, *i); - if (r < 0) - goto finish; - } + assert_se(i = hashmap_first(c.will_install)); - r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); + r = unit_file_search(&c, i, &paths, root_dir, false); + if (r < 0) + return r; - /* Returns number of symlinks that where supposed to be installed. */ - q = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes); - if (r == 0) - r = q; + path = strappenda(config_path, "/" SPECIAL_DEFAULT_TARGET); -finish: - lookup_paths_free(&paths); - install_context_done(&c); - set_free_free(remove_symlinks_to); - free(config_path); + r = create_symlink(i->path, path, force, changes, n_changes); + if (r < 0) + return r; - return r; + return 0; +} + +int unit_file_get_default( + UnitFileScope scope, + const char *root_dir, + char **name) { + + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + char **p; + int r; + + assert(scope >= 0); + assert(scope < _UNIT_FILE_SCOPE_MAX); + assert(name); + + r = lookup_paths_init_from_scope(&paths, scope); + if (r < 0) + return r; + + STRV_FOREACH(p, paths.unit_path) { + _cleanup_free_ char *path = NULL, *tmp = NULL; + char *n; + + if (isempty(root_dir)) + path = strappend(*p, "/" SPECIAL_DEFAULT_TARGET); + else + path = strjoin(root_dir, "/", *p, "/" SPECIAL_DEFAULT_TARGET, NULL); + + if (!path) + return -ENOMEM; + + r = readlink_malloc(path, &tmp); + if (r == -ENOENT) + continue; + else if (r == -EINVAL) + /* not a symlink */ + n = strdup(SPECIAL_DEFAULT_TARGET); + else if (r < 0) + return r; + else + n = strdup(basename(tmp)); + + if (!n) + return -ENOMEM; + + *name = n; + return 0; + } + + return -ENOENT; } UnitFileState unit_file_get_state( @@ -1536,21 +1660,20 @@ UnitFileState unit_file_get_state( const char *root_dir, const char *name) { - LookupPaths paths; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; UnitFileState state = _UNIT_FILE_STATE_INVALID; - char **i, *path = NULL; + char **i; + _cleanup_free_ char *path = NULL; int r; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); assert(name); - zero(paths); - if (root_dir && scope != UNIT_FILE_SYSTEM) return -EINVAL; - if (!unit_name_is_valid_no_type(name, true)) + if (!unit_name_is_valid(name, TEMPLATE_VALID)) return -EINVAL; r = lookup_paths_init_from_scope(&paths, scope); @@ -1568,65 +1691,55 @@ UnitFileState unit_file_get_state( else asprintf(&path, "%s/%s", *i, name); - if (!path) { - r = -ENOMEM; - goto finish; - } + if (!path) + return -ENOMEM; + /* + * Search for a unit file in our default paths, to + * be sure, that there are no broken symlinks. + */ if (lstat(path, &st) < 0) { r = -errno; - if (errno == ENOENT) - continue; - - goto finish; - } - - if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) { - r = -ENOENT; - goto finish; - } + if (errno != ENOENT) + return r; - r = null_or_empty_path(path); - if (r < 0 && r != -ENOENT) - goto finish; - else if (r > 0) { - state = path_startswith(*i, "/run") ? - UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; - r = 0; - goto finish; + if (!unit_name_is_instance(name)) + continue; + } else { + if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) + return -ENOENT; + + r = null_or_empty_path(path); + if (r < 0 && r != -ENOENT) + return r; + else if (r > 0) { + state = path_startswith(*i, "/run") ? + UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; + return state; + } } r = find_symlinks_in_scope(scope, root_dir, name, &state); - if (r < 0) { - goto finish; - } else if (r > 0) { - r = 0; - goto finish; - } + if (r < 0) + return r; + else if (r > 0) + return state; r = unit_file_can_install(&paths, root_dir, path, true); - if (r < 0 && errno != -ENOENT) - goto finish; - else if (r > 0) { - state = UNIT_FILE_DISABLED; - r = 0; - goto finish; - } else if (r == 0) { - state = UNIT_FILE_STATIC; - r = 0; - goto finish; - } + if (r < 0 && errno != ENOENT) + return r; + else if (r > 0) + return UNIT_FILE_DISABLED; + else if (r == 0) + return UNIT_FILE_STATIC; } -finish: - lookup_paths_free(&paths); - free(path); - return r < 0 ? r : state; } int unit_file_query_preset(UnitFileScope scope, const char *name) { - char **files, **i; + _cleanup_strv_free_ char **files = NULL; + char **i; int r; assert(scope >= 0); @@ -1634,17 +1747,19 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) { assert(name); if (scope == UNIT_FILE_SYSTEM) - r = conf_files_list(&files, ".preset", - "/etc/systemd/system.preset", - "/usr/local/lib/systemd/system.preset", - "/usr/lib/systemd/system.preset", - "/lib/systemd/system.preset", + r = conf_files_list(&files, ".preset", NULL, + "/etc/systemd/system-preset", + "/usr/local/lib/systemd/system-preset", + "/usr/lib/systemd/system-preset", +#ifdef HAVE_SPLIT_USR + "/lib/systemd/system-preset", +#endif NULL); else if (scope == UNIT_FILE_GLOBAL) - r = conf_files_list(&files, ".preset", - "/etc/systemd/user.preset", - "/usr/local/lib/systemd/user.preset", - "/usr/lib/systemd/user.preset", + r = conf_files_list(&files, ".preset", NULL, + "/etc/systemd/user-preset", + "/usr/local/lib/systemd/user-preset", + "/usr/lib/systemd/user-preset", NULL); else return 1; @@ -1653,15 +1768,14 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) { return r; STRV_FOREACH(i, files) { - FILE *f; + _cleanup_fclose_ FILE *f; f = fopen(*i, "re"); if (!f) { if (errno == ENOENT) continue; - r = -errno; - goto finish; + return -errno; } for (;;) { @@ -1674,83 +1788,67 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) { if (!*l) continue; - if (strchr(COMMENTS, *l)) + if (strchr(COMMENTS "\n", *l)) continue; if (first_word(l, "enable")) { l += 6; l += strspn(l, WHITESPACE); - if (fnmatch(l, name, FNM_NOESCAPE) == 0) { - r = 1; - fclose(f); - goto finish; - } + if (fnmatch(l, name, FNM_NOESCAPE) == 0) + return 1; + } else if (first_word(l, "disable")) { l += 7; l += strspn(l, WHITESPACE); - if (fnmatch(l, name, FNM_NOESCAPE) == 0) { - r = 0; - fclose(f); - goto finish; - } + if (fnmatch(l, name, FNM_NOESCAPE) == 0) + return 0; + } else log_debug("Couldn't parse line '%s'", l); } - - fclose(f); } /* Default is "enable" */ - r = 1; - -finish: - strv_free(files); - - return r; + return 1; } int unit_file_preset( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { - LookupPaths paths; - InstallContext plus, minus; - char **i, *config_path = NULL; - Set *remove_symlinks_to = NULL; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + _cleanup_install_context_done_ InstallContext plus = {}, minus = {}; + char **i; + _cleanup_free_ char *config_path = NULL; + _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; int r, q; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); - zero(paths); - zero(plus); - zero(minus); - r = lookup_paths_init_from_scope(&paths, scope); if (r < 0) return r; r = get_config_path(scope, runtime, root_dir, &config_path); if (r < 0) - goto finish; + return r; STRV_FOREACH(i, files) { - if (!unit_name_is_valid_no_type(*i, true)) { - r = -EINVAL; - goto finish; - } + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) + return -EINVAL; r = unit_file_query_preset(scope, *i); if (r < 0) - goto finish; + return r; if (r) r = install_info_add_auto(&plus, *i); @@ -1758,46 +1856,50 @@ int unit_file_preset( r = install_info_add_auto(&minus, *i); if (r < 0) - goto finish; + return r; } - r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir); + r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, + config_path, root_dir); - q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); + q = remove_marked_symlinks(remove_symlinks_to, config_path, + changes, n_changes, files); if (r == 0) r = q; /* Returns number of symlinks that where supposed to be installed. */ - q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes); + q = install_context_apply(&plus, &paths, config_path, root_dir, force, + changes, n_changes); if (r == 0) r = q; -finish: - lookup_paths_free(&paths); - install_context_done(&plus); - install_context_done(&minus); - set_free_free(remove_symlinks_to); - free(config_path); - return r; } +static void unitfilelist_free(UnitFileList **f) { + if (!*f) + return; + + free((*f)->path); + free(*f); +} +#define _cleanup_unitfilelist_free_ _cleanup_(unitfilelist_free) + int unit_file_get_list( UnitFileScope scope, const char *root_dir, Hashmap *h) { - LookupPaths paths; - char **i, *buf = NULL; - DIR *d = NULL; + _cleanup_lookup_paths_free_ LookupPaths paths = {}; + char **i; + _cleanup_free_ char *buf = NULL; + _cleanup_closedir_ DIR *d = NULL; int r; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); assert(h); - zero(paths); - if (root_dir && scope != UNIT_FILE_SYSTEM) return -EINVAL; @@ -1806,17 +1908,15 @@ int unit_file_get_list( return r; STRV_FOREACH(i, paths.unit_path) { - struct dirent buffer, *de; const char *units_dir; free(buf); buf = NULL; if (root_dir) { - if (asprintf(&buf, "%s/%s", root_dir, *i) < 0) { - r = -ENOMEM; - goto finish; - } + if (asprintf(&buf, "%s/%s", root_dir, *i) < 0) + return -ENOMEM; + units_dir = buf; } else units_dir = *i; @@ -1829,18 +1929,17 @@ int unit_file_get_list( if (errno == ENOENT) continue; - r = -errno; - goto finish; + return -errno; } for (;;) { - UnitFileList *f; + struct dirent *de; + _cleanup_unitfilelist_free_ UnitFileList *f = NULL; - r = readdir_r(d, &buffer, &de); - if (r != 0) { - r = -r; - goto finish; - } + errno = 0; + de = readdir(d); + if (!de && errno != 0) + return -errno; if (!de) break; @@ -1848,7 +1947,7 @@ int unit_file_get_list( if (ignore_file(de->d_name)) continue; - if (!unit_name_is_valid_no_type(de->d_name, true)) + if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID)) continue; if (hashmap_get(h, de->d_name)) @@ -1859,31 +1958,24 @@ int unit_file_get_list( if (r == -ENOENT) continue; - goto finish; + return r; } if (de->d_type != DT_LNK && de->d_type != DT_REG) continue; f = new0(UnitFileList, 1); - if (!f) { - r = -ENOMEM; - goto finish; - } + if (!f) + return -ENOMEM; f->path = path_make_absolute(de->d_name, units_dir); - if (!f->path) { - free(f); - r = -ENOMEM; - goto finish; - } + if (!f->path) + return -ENOMEM; r = null_or_empty_path(f->path); - if (r < 0 && r != -ENOENT) { - free(f->path); - free(f); - goto finish; - } else if (r > 0) { + if (r < 0 && r != -ENOENT) + return r; + else if (r > 0) { f->state = path_startswith(*i, "/run") ? UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; @@ -1891,47 +1983,33 @@ int unit_file_get_list( } r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state); - if (r < 0) { - free(f->path); - free(f); - goto finish; - } else if (r > 0) + if (r < 0) + return r; + else if (r > 0) { + f->state = UNIT_FILE_ENABLED; goto found; + } r = unit_file_can_install(&paths, root_dir, f->path, true); - if (r < 0) { - free(f->path); - free(f); - goto finish; - } else if (r > 0) { + if (r == -EINVAL || /* Invalid setting? */ + r == -EBADMSG || /* Invalid format? */ + r == -ENOENT /* Included file not found? */) + f->state = UNIT_FILE_INVALID; + else if (r < 0) + return r; + else if (r > 0) f->state = UNIT_FILE_DISABLED; - goto found; - } else { + else f->state = UNIT_FILE_STATIC; - goto found; - } - - free(f->path); - free(f); - continue; found: - r = hashmap_put(h, path_get_file_name(f->path), f); - if (r < 0) { - free(f->path); - free(f); - goto finish; - } + r = hashmap_put(h, basename(f->path), f); + if (r < 0) + return r; + f = NULL; /* prevent cleanup */ } } -finish: - lookup_paths_free(&paths); - free(buf); - - if (d) - closedir(d); - return r; } @@ -1943,7 +2021,8 @@ static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = { [UNIT_FILE_MASKED] = "masked", [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime", [UNIT_FILE_STATIC] = "static", - [UNIT_FILE_DISABLED] = "disabled" + [UNIT_FILE_DISABLED] = "disabled", + [UNIT_FILE_INVALID] = "invalid", }; DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);