X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Finstall.c;h=9ce94035b92096e316a051e5c66dae32827427cd;hp=b22019d7b5ddcb24ca9a7967c9280de2d9fa2444;hb=ead349509e325aad720bb0349521a9e56e2ac7c0;hpb=ef42202ac8ed27e7ff1fc90ef8bc2590046dff25 diff --git a/src/shared/install.c b/src/shared/install.c index b22019d7b..9ce94035b 100644 --- a/src/shared/install.c +++ b/src/shared/install.c @@ -38,16 +38,14 @@ #include "conf-files.h" #include "specifier.h" #include "install-printf.h" +#include "special.h" typedef struct { Hashmap *will_install; Hashmap *have_installed; } InstallContext; -#define _cleanup_lookup_paths_free_ \ - __attribute__((cleanup(lookup_paths_free))) -#define _cleanup_install_context_done_ \ - __attribute__((cleanup(install_context_done))) +#define _cleanup_install_context_done_ _cleanup_(install_context_done) static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) { assert(paths); @@ -206,7 +204,7 @@ static int remove_marked_symlinks_fd( d = fdopendir(fd); if (!d) { - close_nointr_nofail(fd); + safe_close(fd); return -errno; } @@ -214,11 +212,10 @@ static int remove_marked_symlinks_fd( for (;;) { struct dirent *de; - union dirent_storage buf; - int k; - k = readdir_r(d, &buf.de, &de); - if (k != 0) { + errno = 0; + de = readdir(d); + if (!de && errno != 0) { r = -errno; break; } @@ -247,7 +244,7 @@ static int remove_marked_symlinks_fd( p = path_make_absolute(de->d_name, path); if (!p) { - close_nointr_nofail(nfd); + safe_close(nfd); return -ENOMEM; } @@ -278,10 +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, path_get_file_name(p)); + found = found && strv_contains(files, basename(p)); if (found) { @@ -335,7 +332,7 @@ static int remove_marked_symlinks( int q, cfd; deleted = false; - cfd = dup(fd); + cfd = fcntl(fd, F_DUPFD_CLOEXEC, 3); if (cfd < 0) { r = -errno; break; @@ -347,7 +344,7 @@ static int remove_marked_symlinks( r = q; } while (deleted); - close_nointr_nofail(fd); + safe_close(fd); return r; } @@ -370,17 +367,16 @@ static int find_symlinks_fd( d = fdopendir(fd); if (!d) { - close_nointr_nofail(fd); + safe_close(fd); return -errno; } for (;;) { - int k; struct dirent *de; - union dirent_storage buf; - k = readdir_r(d, &buf.de, &de); - if (k != 0) + errno = 0; + de = readdir(d); + if (!de && errno != 0) return -errno; if (!de) @@ -407,7 +403,7 @@ static int find_symlinks_fd( p = path_make_absolute(de->d_name, path); if (!p) { - close_nointr_nofail(nfd); + safe_close(nfd); return -ENOMEM; } @@ -453,7 +449,7 @@ 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); + found_dest = streq(basename(dest), name); if (found_path && found_dest) { _cleanup_free_ char *t = NULL; @@ -473,8 +469,6 @@ static int find_symlinks_fd( return 1; } } - - return r; } static int find_symlinks( @@ -506,7 +500,7 @@ static int find_symlinks_in_scope( UnitFileState *state) { int r; - _cleanup_free_ char *path = NULL; + _cleanup_free_ char *path2 = NULL; bool same_name_link_runtime = false, same_name_link = false; assert(scope >= 0); @@ -514,6 +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); @@ -530,11 +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); + r = find_symlinks(name, path2, &same_name_link); if (r < 0) return r; else if (r > 0) { @@ -559,7 +554,7 @@ int unit_file_mask( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { @@ -578,7 +573,7 @@ int unit_file_mask( STRV_FOREACH(i, files) { _cleanup_free_ char *path = NULL; - if (!unit_name_is_valid(*i, true)) { + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -628,7 +623,7 @@ int unit_file_unmask( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, UnitFileChange **changes, unsigned *n_changes) { @@ -646,7 +641,7 @@ int unit_file_unmask( STRV_FOREACH(i, files) { char *path; - if (!unit_name_is_valid(*i, true)) { + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -693,7 +688,7 @@ int unit_file_link( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { @@ -719,10 +714,10 @@ int unit_file_link( char *fn; struct stat st; - fn = path_get_file_name(*i); + fn = basename(*i); if (!path_is_absolute(*i) || - !unit_name_is_valid(fn, true)) { + !unit_name_is_valid(fn, TEMPLATE_VALID)) { if (r == 0) r = -EINVAL; continue; @@ -862,9 +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(name, true)) + if (!unit_name_is_valid(name, TEMPLATE_VALID)) return -EINVAL; if (hashmap_get(c->have_installed, name) || @@ -923,6 +918,7 @@ 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, @@ -958,6 +954,7 @@ 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, @@ -966,14 +963,15 @@ static int config_parse_user(const char *unit, InstallInfo *i = data; char* printed; + int r; assert(filename); assert(lvalue); assert(rvalue); - printed = install_full_printf(i, rvalue); - if (!printed) - return -ENOMEM; + r = install_full_printf(i, rvalue, &printed); + if (r < 0) + return r; free(i->user); i->user = printed; @@ -1010,19 +1008,19 @@ static int unit_file_load( f = fdopen(fd, "re"); if (!f) { - close_nointr_nofail(fd); + safe_close(fd); return -ENOMEM; } r = config_parse(NULL, path, f, NULL, - config_item_table_lookup, (void*) items, true, info); + config_item_table_lookup, (void*) items, true, true, info); if (r < 0) return r; return - strv_length(info->aliases) + - strv_length(info->wanted_by) + - strv_length(info->required_by); + (int) strv_length(info->aliases) + + (int) strv_length(info->wanted_by) + + (int) strv_length(info->required_by); } static int unit_file_search( @@ -1061,8 +1059,8 @@ static int unit_file_search( info->path = path; else { if (r == -ENOENT && unit_name_is_instance(info->name)) { - /* unit file doesn't exist, however instance enablement was request */ - /* we will check if it is possible to load template unit file */ + /* 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; @@ -1073,7 +1071,7 @@ static int unit_file_search( return -ENOMEM; } - /* we will reuse path variable since we don't need it anymore */ + /* We will reuse path variable since we don't need it anymore. */ template_dir = path; *(strrchr(path, '/') + 1) = '\0'; @@ -1084,7 +1082,7 @@ static int unit_file_search( return -ENOMEM; } - /* let's try to load template unit */ + /* 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); @@ -1132,9 +1130,9 @@ static int unit_file_can_install( if (r >= 0) r = - strv_length(i->aliases) + - strv_length(i->wanted_by) + - strv_length(i->required_by); + (int) strv_length(i->aliases) + + (int) strv_length(i->wanted_by) + + (int) strv_length(i->required_by); return r; } @@ -1172,7 +1170,9 @@ static int create_symlink( if (!force) return -EEXIST; - unlink(new_path); + r = unlink(new_path); + if (r < 0 && errno != ENOENT) + return -errno; if (symlink(old_path, new_path) >= 0) { add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL); @@ -1199,9 +1199,9 @@ static int install_info_symlink_alias( STRV_FOREACH(s, i->aliases) { _cleanup_free_ char *alias_path = NULL, *dst = NULL; - dst = install_full_printf(i, *s); - if (!dst) - return -ENOMEM; + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; alias_path = path_make_absolute(dst, config_path); if (!alias_path) @@ -1231,11 +1231,11 @@ static int install_info_symlink_wants( STRV_FOREACH(s, i->wanted_by) { _cleanup_free_ char *path = NULL, *dst = NULL; - dst = install_full_printf(i, *s); - if (!dst) - return -ENOMEM; + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; - if (!unit_name_is_valid(dst, true)) { + if (!unit_name_is_valid(dst, TEMPLATE_VALID)) { r = -EINVAL; continue; } @@ -1268,11 +1268,11 @@ static int install_info_symlink_requires( STRV_FOREACH(s, i->required_by) { _cleanup_free_ char *path = NULL, *dst = NULL; - dst = install_full_printf(i, *s); - if (!dst) - return -ENOMEM; + q = install_full_printf(i, *s, &dst); + if (q < 0) + return q; - if (!unit_name_is_valid(dst, true)) { + if (!unit_name_is_valid(dst, TEMPLATE_VALID)) { r = -EINVAL; continue; } @@ -1413,7 +1413,9 @@ 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; @@ -1422,16 +1424,30 @@ static int install_context_mark_for_removal( r += q; if (unit_name_is_instance(i->name)) { - char *unit_file = NULL; + 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(); - unit_file = path_get_file_name(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); + free(unit_file); + } } else q = mark_symlink_for_removal(remove_symlinks_to, i->name); @@ -1446,7 +1462,7 @@ int unit_file_enable( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { @@ -1478,15 +1494,15 @@ int unit_file_enable( supposed to be created, not the ones actually created. This is 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); - return r; + + return install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes); } int unit_file_disable( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, UnitFileChange **changes, unsigned *n_changes) { @@ -1527,47 +1543,118 @@ 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; + + 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 = {}; - char **i; _cleanup_free_ char *config_path = NULL; - _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; - int r, q; + char *path; + int r; + InstallInfo *i = NULL; assert(scope >= 0); assert(scope < _UNIT_FILE_SCOPE_MAX); + assert(file); + + 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) return r; - STRV_FOREACH(i, files) { - r = mark_symlink_for_removal(&remove_symlinks_to, *i); - if (r < 0) - return r; + r = install_info_add_auto(&c, file); + if (r < 0) + return r; - r = install_info_add_auto(&c, *i); - if (r < 0) + assert_se(i = hashmap_first(c.will_install)); + + r = unit_file_search(&c, i, &paths, root_dir, false); + if (r < 0) + return r; + + path = strappenda(config_path, "/" SPECIAL_DEFAULT_TARGET); + + r = create_symlink(i->path, path, force, changes, n_changes); + if (r < 0) + 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)); - r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files); + if (!n) + return -ENOMEM; - /* 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; + *name = n; + return 0; + } - return r; + return -ENOENT; } UnitFileState unit_file_get_state( @@ -1588,7 +1675,7 @@ UnitFileState unit_file_get_state( if (root_dir && scope != UNIT_FILE_SYSTEM) return -EINVAL; - if (!unit_name_is_valid(name, true)) + if (!unit_name_is_valid(name, TEMPLATE_VALID)) return -EINVAL; r = lookup_paths_init_from_scope(&paths, scope); @@ -1609,24 +1696,29 @@ UnitFileState unit_file_get_state( 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; - - return -errno; - } + if (errno != ENOENT) + return r; - if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) - return -ENOENT; + 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 = 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); @@ -1728,7 +1820,7 @@ int unit_file_preset( UnitFileScope scope, bool runtime, const char *root_dir, - char *files[], + char **files, bool force, UnitFileChange **changes, unsigned *n_changes) { @@ -1753,7 +1845,7 @@ int unit_file_preset( STRV_FOREACH(i, files) { - if (!unit_name_is_valid(*i, true)) + if (!unit_name_is_valid(*i, TEMPLATE_VALID)) return -EINVAL; r = unit_file_query_preset(scope, *i); @@ -1793,6 +1885,7 @@ static void unitfilelist_free(UnitFileList **f) { free((*f)->path); free(*f); } +#define _cleanup_unitfilelist_free_ _cleanup_(unitfilelist_free) int unit_file_get_list( UnitFileScope scope, @@ -1843,13 +1936,12 @@ int unit_file_get_list( for (;;) { struct dirent *de; - union dirent_storage buffer; - UnitFileList __attribute__((cleanup(unitfilelist_free))) - *f = NULL; + _cleanup_unitfilelist_free_ UnitFileList *f = NULL; - r = readdir_r(d, &buffer.de, &de); - if (r != 0) - return -r; + errno = 0; + de = readdir(d); + if (!de && errno != 0) + return -errno; if (!de) break; @@ -1857,7 +1949,7 @@ int unit_file_get_list( if (ignore_file(de->d_name)) continue; - if (!unit_name_is_valid(de->d_name, true)) + if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID)) continue; if (hashmap_get(h, de->d_name)) @@ -1913,7 +2005,7 @@ int unit_file_get_list( f->state = UNIT_FILE_STATIC; found: - r = hashmap_put(h, path_get_file_name(f->path), f); + r = hashmap_put(h, basename(f->path), f); if (r < 0) return r; f = NULL; /* prevent cleanup */