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-rw-r--r--cmd/runsvc/env.c130
-rw-r--r--cmd/runsvc/runsvc.c138
-rw-r--r--cmd/runsvc/runsvc.h36
3 files changed, 304 insertions, 0 deletions
diff --git a/cmd/runsvc/env.c b/cmd/runsvc/env.c
new file mode 100644
index 0000000..4fe2368
--- /dev/null
+++ b/cmd/runsvc/env.c
@@ -0,0 +1,130 @@
+/* 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 "runsvc.h"
+
+struct entry {
+ struct entry *next;
+ char data[];
+};
+
+extern char **environ;
+
+static void free_list(struct entry *list)
+{
+ struct entry *e;
+
+ while (list != NULL) {
+ e = list;
+ list = list->next;
+ free(e);
+ }
+}
+
+static struct entry *parse_list(rdline_t *rd)
+{
+ struct entry *e, *list = NULL;
+ char *ptr;
+
+ while (rdline(rd) == 0) {
+ ptr = rd->buffer;
+
+ while (*ptr != '\0' && *ptr != ' ' && *ptr != '=')
+ ++ptr;
+
+ if (*ptr == ' ')
+ memmove(ptr, ptr + 1, strlen(ptr + 1) + 1);
+
+ if (*(ptr++) != '=') {
+ fprintf(stderr, "%s: %zu: line is not of the shape "
+ "'key = value', skipping\n",
+ rd->filename, rd->lineno);
+ continue;
+ }
+
+ if (*ptr == ' ')
+ memmove(ptr, ptr + 1, strlen(ptr + 1) + 1);
+
+ if (unescape(ptr)) {
+ fprintf(stderr, "%s: %zu: malformed string constant, "
+ "skipping\n",
+ rd->filename, rd->lineno);
+ continue;
+ }
+
+ e = calloc(1, sizeof(*e) + strlen(rd->buffer) + 1);
+ if (e == NULL)
+ goto fail_oom;
+
+ strcpy(e->data, rd->buffer);
+ e->next = list;
+ list = e;
+ }
+
+ return list;
+fail_oom:
+ fputs("out of memory\n", stderr);
+ free_list(list);
+ return NULL;
+}
+
+static struct entry *list_from_file(void)
+{
+ struct entry *list;
+ rdline_t rd;
+ int fd;
+
+ fd = open(ENVFILE, O_RDONLY);
+ if (fd < 0) {
+ perror(ENVFILE);
+ return NULL;
+ }
+
+ rdline_init(&rd, fd, ENVFILE, 0, NULL);
+ list = parse_list(&rd);
+ close(fd);
+ return list;
+}
+
+int initenv(void)
+{
+ struct entry *list, *e;
+ int i, count;
+ char **envp;
+
+ list = list_from_file();
+ if (list == NULL)
+ return -1;
+
+ for (count = 0, e = list; e != NULL; e = e->next)
+ ++count;
+
+ envp = malloc((count + 1) * sizeof(char *));
+ if (envp == NULL) {
+ fputs("out of memory\n", stderr);
+ free_list(list);
+ return -1;
+ }
+
+ for (i = 0, e = list; e != NULL; e = e->next)
+ envp[i] = e->data;
+
+ envp[i] = NULL;
+
+ environ = envp;
+ return 0;
+}
diff --git a/cmd/runsvc/runsvc.c b/cmd/runsvc/runsvc.c
new file mode 100644
index 0000000..a8e5bb2
--- /dev/null
+++ b/cmd/runsvc/runsvc.c
@@ -0,0 +1,138 @@
+/* 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 "runsvc.h"
+
+static int setup_tty(const char *ctty)
+{
+ int fd;
+
+ if (ctty != NULL) {
+ fd = open(ctty, O_RDWR);
+ if (fd < 0) {
+ perror(ctty);
+ return -1;
+ }
+
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+
+ setsid();
+
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ close(fd);
+ }
+
+ return 0;
+}
+
+/*****************************************************************************/
+
+static NORETURN void argv_exec(exec_t *e)
+{
+ char **argv = alloca(e->argc + 1), *ptr;
+ int i;
+
+ for (ptr = e->args, i = 0; i < e->argc; ++i, ptr += strlen(ptr) + 1)
+ argv[i] = ptr;
+
+ argv[i] = NULL;
+ execvp(argv[0], argv);
+ perror(argv[0]);
+ exit(EXIT_FAILURE);
+}
+
+static int runlst_wait(exec_t *list)
+{
+ pid_t ret, pid;
+ int status;
+
+ for (; list != NULL; list = list->next) {
+ pid = fork();
+
+ if (pid == 0)
+ argv_exec(list);
+
+ if (pid == -1) {
+ perror("fork");
+ return EXIT_FAILURE;
+ }
+
+ do {
+ ret = waitpid(pid, &status, 0);
+ } while (ret != pid);
+
+ if (!WIFEXITED(status))
+ return EXIT_FAILURE;
+
+ if (WEXITSTATUS(status) != EXIT_SUCCESS)
+ return WEXITSTATUS(status);
+ }
+
+ return EXIT_SUCCESS;
+}
+
+/*****************************************************************************/
+
+int main(int argc, char **argv)
+{
+ int dirfd, ret = EXIT_FAILURE;
+ service_t *svc = NULL;
+
+ if (argc != 3) {
+ fputs("usage: runsvc <directory> <filename>\n", stderr);
+ goto out;
+ }
+
+ if (getppid() != 1) {
+ fputs("must be run by init!\n", stderr);
+ goto out;
+ }
+
+ dirfd = open(argv[1], O_RDONLY | O_DIRECTORY);
+ if (dirfd < 0) {
+ perror(argv[1]);
+ goto out;
+ }
+
+ svc = rdsvc(dirfd, argv[2], RDSVC_NO_FNAME | RDSVC_NO_DEPS);
+ close(dirfd);
+ if (svc == NULL)
+ goto out;
+
+ if (svc->exec == NULL) {
+ ret = EXIT_SUCCESS;
+ goto out;
+ }
+
+ if (initenv())
+ goto out;
+
+ if (setup_tty(svc->ctty))
+ goto out;
+
+ if (svc->exec->next == NULL)
+ argv_exec(svc->exec);
+
+ ret = runlst_wait(svc->exec);
+out:
+ delsvc(svc);
+ return ret;
+}
diff --git a/cmd/runsvc/runsvc.h b/cmd/runsvc/runsvc.h
new file mode 100644
index 0000000..15785d3
--- /dev/null
+++ b/cmd/runsvc/runsvc.h
@@ -0,0 +1,36 @@
+/* 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/>.
+ */
+#ifndef RUNSVC_H
+#define RUNSVC_H
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include "service.h"
+#include "util.h"
+
+#define ENVFILE ETCPATH "/initd.env"
+
+int initenv(void);
+
+#endif /* RUNSVC_H */
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