diff options
Diffstat (limited to 'lib/src/rdsvc.c')
-rw-r--r-- | lib/src/rdsvc.c | 356 |
1 files changed, 0 insertions, 356 deletions
diff --git a/lib/src/rdsvc.c b/lib/src/rdsvc.c deleted file mode 100644 index 546962d..0000000 --- a/lib/src/rdsvc.c +++ /dev/null @@ -1,356 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * Copyright (C) 2018 - David Oberhollenzer - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. - */ -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> -#include <fcntl.h> -#include <ctype.h> - -#include "service.h" -#include "util.h" - -static int try_unescape(char *arg, rdline_t *rd) -{ - if (unescape(arg)) { - fprintf(stderr, "%s: %zu: malformed string constant\n", - rd->filename, rd->lineno); - return -1; - } - return 0; -} - -static char *try_strdup(const char *str, rdline_t *rd) -{ - char *out = strdup(str); - - if (out == NULL) { - fprintf(stderr, "%s: %zu: out of memory\n", - rd->filename, rd->lineno); - } - return out; -} - -static int try_pack_argv(char *str, rdline_t *rd) -{ - int count = pack_argv(str); - if (count < 0) { - fprintf(stderr, "%s: %zu: malformed string constant\n", - rd->filename, rd->lineno); - } - return count; -} - -static int svc_desc(service_t *svc, char *arg, rdline_t *rd) -{ - if (try_unescape(arg, rd)) - return -1; - svc->desc = try_strdup(arg, rd); - return svc->desc == NULL ? -1 : 0; -} - -static int svc_tty(service_t *svc, char *arg, rdline_t *rd) -{ - if (try_unescape(arg, rd)) - return -1; - svc->ctty = try_strdup(arg, rd); - return svc->ctty == NULL ? -1 : 0; -} - -static int svc_exec(service_t *svc, char *arg, rdline_t *rd) -{ - exec_t *e, *end; - - e = calloc(1, sizeof(*e) + strlen(arg) + 1); - if (e == NULL) { - fprintf(stderr, "%s: %zu: out of memory\n", - rd->filename, rd->lineno); - return -1; - } - - strcpy(e->args, arg); - - e->argc = try_pack_argv(e->args, rd); - if (e->argc < 0) - return -1; - - if (svc->exec == NULL) { - svc->exec = e; - } else { - for (end = svc->exec; end->next != NULL; end = end->next) - ; - end->next = e; - } - return 0; -} - -static int svc_before(service_t *svc, char *arg, rdline_t *rd) -{ - if (svc->before != NULL) { - fprintf(stderr, "%s: %zu: 'before' dependencies respecified\n", - rd->filename, rd->lineno); - return -1; - } - - svc->before = try_strdup(arg, rd); - if (svc->before == NULL) - return -1; - - svc->num_before = try_pack_argv(svc->before, rd); - return (svc->num_before < 0) ? -1 : 0; -} - -static int svc_after(service_t *svc, char *arg, rdline_t *rd) -{ - if (svc->after != NULL) { - fprintf(stderr, "%s: %zu: 'after' dependencies respecified\n", - rd->filename, rd->lineno); - return -1; - } - - svc->after = try_strdup(arg, rd); - if (svc->after == NULL) - return -1; - - svc->num_after = try_pack_argv(svc->after, rd); - return (svc->num_after < 0) ? -1 : 0; -} - -static int svc_type(service_t *svc, char *arg, rdline_t *rd) -{ - int count = try_pack_argv(arg, rd); - - if (count < 1) - return -1; - - svc->type = svc_type_from_string(arg); - - if (svc->type == -1) { - fprintf(stderr, "%s: %zu: unknown service type '%s'\n", - rd->filename, rd->lineno, arg); - return -1; - } - - if (count > 1) { - arg += strlen(arg) + 1; - - switch (svc->type) { - case SVC_RESPAWN: - if (strcmp(arg, "limit") != 0) - goto fail_limit; - arg += strlen(arg) + 1; - - if (count > 3) - goto fail_args; - if (!isdigit(*arg)) - goto fail_limit; - svc->rspwn_limit = atoi(arg); - break; - default: - goto fail_args; - } - } - - return 0; -fail_args: - fprintf(stderr, "%s: %zu: unexpected extra arguments\n", - rd->filename, rd->lineno); - return -1; -fail_limit: - fprintf(stderr, "%s: %zu: expected 'limit <value>' after 'respawn'\n", - rd->filename, rd->lineno); - return -1; -} - -static int svc_target(service_t *svc, char *arg, rdline_t *rd) -{ - int target; - - if (try_unescape(arg, rd)) - return -1; - - target = svc_target_from_string(arg); - - if (target == -1) { - fprintf(stderr, "%s: %zu: unknown service target '%s'\n", - rd->filename, rd->lineno, arg); - return -1; - } - - svc->target = target; - return 0; -} - -static const struct svc_param { - const char *key; - - unsigned int allow_block : 1; - - int flags; - - int (*handle)(service_t *svc, char *arg, rdline_t *rd); -} svc_params[] = { - { "description", 0, 0, svc_desc }, - { "exec", 1, RDSVC_NO_EXEC, svc_exec }, - { "type", 0, 0, svc_type }, - { "target", 0, 0, svc_target }, - { "tty", 0, RDSVC_NO_CTTY, svc_tty }, - { "before", 0, RDSVC_NO_DEPS, svc_before }, - { "after", 0, RDSVC_NO_DEPS, svc_after }, -}; - -static int splitkv(rdline_t *rd, char **k, char **v) -{ - char *key = rd->buffer, *value = rd->buffer; - - while (*value != ' ' && *value != '\0') { - if (!isalpha(*value)) { - fprintf(stderr, - "%s: %zu: unexpected '%c' in keyword\n", - rd->filename, rd->lineno, *value); - return -1; - } - ++value; - } - - if (*value != ' ') { - fprintf(stderr, "%s: %zu: expected argument after '%s'\n", - rd->filename, rd->lineno, key); - return -1; - } - - *(value++) = '\0'; - - *k = key; - *v = value; - return 0; -} - -static const struct svc_param *find_param(rdline_t *rd, const char *name) -{ - size_t i; - - for (i = 0; i < ARRAY_SIZE(svc_params); ++i) { - if (!strcmp(svc_params[i].key, name)) - return svc_params + i; - } - - fprintf(stderr, "%s: %zu: unknown keyword '%s'\n", - rd->filename, rd->lineno, name); - return NULL; -} - - -service_t *rdsvc(int dirfd, const char *filename, int flags) -{ - const struct svc_param *p; - const char *arg, *args[1]; - service_t *svc = NULL; - char *key, *value; - size_t argc, nlen; - rdline_t rd; - int fd, ret; - - fd = openat(dirfd, filename, O_RDONLY); - if (fd < 0) { - perror(filename); - return NULL; - } - - arg = strchr(filename, '@'); - if (arg != NULL) { - args[0] = arg + 1; - argc = 1; - } else { - argc = 0; - } - - rdline_init(&rd, fd, filename, argc, args); - - nlen = (arg != NULL) ? (size_t)(arg - filename) : strlen(filename); - - svc = calloc(1, sizeof(*svc) + nlen + 1); - if (svc == NULL) - goto fail_oom; - - if (!(flags & RDSVC_NO_FNAME)) { - svc->fname = strdup(filename); - if (svc->fname == NULL) - goto fail_oom; - } - - memcpy(svc->name, filename, nlen); - - while ((ret = rdline(&rd)) == 0) { - if (splitkv(&rd, &key, &value)) - goto fail; - - p = find_param(&rd, key); - if (p == NULL) - goto fail; - - if (p->allow_block && *value == '{') { - for (++value; *value == ' '; ++value) - ; - - if (!(flags & p->flags)) { - if (*value != '\0' && - p->handle(svc, value, &rd)) { - goto fail; - } - } - - while ((ret = rdline(&rd)) == 0) { - if (strcmp(rd.buffer, "}") == 0) - break; - if (flags & p->flags) - continue; - if (p->handle(svc, rd.buffer, &rd)) - goto fail; - } - - if (ret < 0) - goto fail; - if (ret > 0) - goto fail_bra; - } else { - if (flags & p->flags) - continue; - if (p->handle(svc, value, &rd)) - goto fail; - } - } - - if (ret < 0) - goto fail; - - close(fd); - return svc; -fail_bra: - fprintf(stderr, "%s: missing '}' before end-of-file\n", filename); - goto fail; -fail_oom: - fputs("out of memory\n", stderr); -fail: - delsvc(svc); - close(fd); - return NULL; -} |