init

tools/unix/process.c

@@ -0,0 +1,55 @@
+// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
+// SPDX-License-Identifier: mit
+
+#include <errno.h>
+#include <spawn.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "process.h"
+
+extern char **environ;
+
+void pipeline(const char *const *argv, struct pipeline *pl) {
+  posix_spawn_file_actions_t file_acts;
+
+  int pipefds[2];
+  if (pipe(pipefds)) {
+    die_errno(errno, "pipe");
+  }
+
+  die_errno(posix_spawn_file_actions_init(&file_acts),
+            "posix_spawn_file_actions_init");
+  die_errno(posix_spawn_file_actions_adddup2(&file_acts, pipefds[0], 0),
+            "posix_spawn_file_actions_adddup2");
+  die_errno(posix_spawn_file_actions_addclose(&file_acts, pipefds[0]),
+            "posix_spawn_file_actions_addclose");
+  die_errno(posix_spawn_file_actions_addclose(&file_acts, pipefds[1]),
+            "posix_spawn_file_actions_addclose");
+
+  die_errno(posix_spawnp(&pl->pid, argv[0], &file_acts, NULL,
+                         (char *const *)argv, environ),
+            "posix_spawnp: %s", argv[0]);
+
+  die_errno(posix_spawn_file_actions_destroy(&file_acts),
+            "posix_spawn_file_actions_destroy");
+
+  if (close(pipefds[0])) {
+    die_errno(errno, "close");
+  }
+
+  pl->infd = pipefds[1];
+}
+
+int finish_pipeline(struct pipeline *pl) {
+  int status;
+
+  if (close(pl->infd)) {
+    die_errno(errno, "close");
+  }
+  if (waitpid(pl->pid, &status, 0) < 0) {
+    die_errno(errno, "waitpid");
+  }
+  return WIFEXITED(status) && WEXITSTATUS(status) == 0;
+}

tools/unix/process.h

@@ -0,0 +1,10 @@
+// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
+// SPDX-License-Identifier: mit
+
+struct pipeline {
+  int pid;
+  int infd;
+};
+
+extern void pipeline(const char *const *argv, struct pipeline *pl);
+extern int finish_pipeline(struct pipeline *pl);