chiark / gitweb /
systemd-run: make sure --nice=, --uid=, --gid=, --setenv= also work in --scope mode
[elogind.git] / src / shared / install.c
index b22019d7b5ddcb24ca9a7967c9280de2d9fa2444..f57b94d599daf574fd1d38898ef267f9ddbb7847 100644 (file)
 #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);
@@ -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;
                 }
@@ -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) {
 
@@ -375,12 +372,11 @@ static int find_symlinks_fd(
         }
 
         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)
@@ -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;
@@ -1015,14 +1013,14 @@ static int unit_file_load(
         }
 
         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;
 }
@@ -1199,9 +1197,9 @@ 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 +1229,11 @@ 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 +1266,11 @@ 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 +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;
 
@@ -1422,16 +1422,30 @@ 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 +1460,7 @@ int unit_file_enable(
                 UnitFileScope scope,
                 bool runtime,
                 const char *root_dir,
-                char *files[],
+                char **files,
                 bool force,
                 UnitFileChange **changes,
                 unsigned *n_changes) {
@@ -1486,7 +1500,7 @@ int unit_file_disable(
                 UnitFileScope scope,
                 bool runtime,
                 const char *root_dir,
-                char *files[],
+                char **files,
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
@@ -1527,47 +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;
+
+        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 +1673,7 @@ 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 +1694,29 @@ 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 +1818,7 @@ 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 +1843,7 @@ 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 +1883,7 @@ 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 +1934,12 @@ 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 +1947,7 @@ 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 +2003,7 @@ 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 */