| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #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 <stdbool.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; |
| bool 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 = (char **)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_subprocess *)gpr_zalloc(sizeof(gpr_subprocess)); |
| 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 for pid %d: %s", p->pid, |
| strerror(errno)); |
| return -1; |
| } |
| p->joined = true; |
| return status; |
| } |
| |
| void gpr_subprocess_interrupt(gpr_subprocess *p) { |
| if (!p->joined) { |
| kill(p->pid, SIGINT); |
| } |
| } |
| |
| #endif /* GPR_POSIX_SUBPROCESS */ |