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-rw-r--r--src/core/lib/support/subprocess_posix.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/core/lib/support/subprocess_posix.c b/src/core/lib/support/subprocess_posix.c
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+++ b/src/core/lib/support/subprocess_posix.c
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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SUBPROCESS
+
+#include <grpc/support/subprocess.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+struct gpr_subprocess {
+ int pid;
+ int joined;
+};
+
+const char *gpr_subprocess_binary_extension() { return ""; }
+
+gpr_subprocess *gpr_subprocess_create(int argc, const char **argv) {
+ gpr_subprocess *r;
+ int pid;
+ char **exec_args;
+
+ pid = fork();
+ if (pid == -1) {
+ return NULL;
+ } else if (pid == 0) {
+ exec_args = gpr_malloc(((size_t)argc + 1) * sizeof(char *));
+ memcpy(exec_args, argv, (size_t)argc * sizeof(char *));
+ exec_args[argc] = NULL;
+ execv(exec_args[0], exec_args);
+ /* if we reach here, an error has occurred */
+ gpr_log(GPR_ERROR, "execv '%s' failed: %s", exec_args[0], strerror(errno));
+ _exit(1);
+ return NULL;
+ } else {
+ r = gpr_malloc(sizeof(gpr_subprocess));
+ memset(r, 0, sizeof(*r));
+ r->pid = pid;
+ return r;
+ }
+}
+
+void gpr_subprocess_destroy(gpr_subprocess *p) {
+ if (!p->joined) {
+ kill(p->pid, SIGKILL);
+ gpr_subprocess_join(p);
+ }
+ gpr_free(p);
+}
+
+int gpr_subprocess_join(gpr_subprocess *p) {
+ int status;
+retry:
+ if (waitpid(p->pid, &status, 0) == -1) {
+ if (errno == EINTR) {
+ goto retry;
+ }
+ gpr_log(GPR_ERROR, "waitpid failed: %s", strerror(errno));
+ return -1;
+ }
+ return status;
+}
+
+void gpr_subprocess_interrupt(gpr_subprocess *p) {
+ if (!p->joined) {
+ kill(p->pid, SIGINT);
+ }
+}
+
+#endif /* GPR_POSIX_SUBPROCESS */