/* Tests for spawn. Copyright (C) 2000-2020 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper , 2000. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see . */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* Nonzero if the program gets called via `exec'. */ static int restart; #define CMDLINE_OPTIONS \ { "restart", no_argument, &restart, 1 }, /* Name of the temporary files. */ static char *name1; static char *name2; static char *name3; static char *name5; /* Descriptors for the temporary files. */ static int temp_fd1 = -1; static int temp_fd2 = -1; static int temp_fd3 = -1; static int temp_fd5 = -1; /* The contents of our files. */ static const char fd1string[] = "This file should get closed"; static const char fd2string[] = "This file should stay opened"; static const char fd3string[] = "This file will be opened"; static const char fd5string[] = "This file should stay opened (O_CLOEXEC)"; /* We have a preparation function. */ static void do_prepare (int argc, char *argv[]) { /* We must not open any files in the restart case. */ if (restart) return; TEST_VERIFY_EXIT ((temp_fd1 = create_temp_file ("spawn", &name1)) != -1); TEST_VERIFY_EXIT ((temp_fd2 = create_temp_file ("spawn", &name2)) != -1); TEST_VERIFY_EXIT ((temp_fd3 = create_temp_file ("spawn", &name3)) != -1); TEST_VERIFY_EXIT ((temp_fd5 = create_temp_file ("spawn", &name5)) != -1); int flags; TEST_VERIFY_EXIT ((flags = fcntl (temp_fd5, F_GETFD, &flags)) != -1); TEST_COMPARE (fcntl (temp_fd5, F_SETFD, flags | FD_CLOEXEC), 0); } #define PREPARE do_prepare static int handle_restart (const char *fd1s, const char *fd2s, const char *fd3s, const char *fd4s, const char *name, const char *fd5s) { char buf[100]; int fd1; int fd2; int fd3; int fd4; int fd5; /* First get the descriptors. */ fd1 = atol (fd1s); fd2 = atol (fd2s); fd3 = atol (fd3s); fd4 = atol (fd4s); fd5 = atol (fd5s); /* Sanity check. */ TEST_VERIFY_EXIT (fd1 != fd2); TEST_VERIFY_EXIT (fd1 != fd3); TEST_VERIFY_EXIT (fd1 != fd4); TEST_VERIFY_EXIT (fd2 != fd3); TEST_VERIFY_EXIT (fd2 != fd4); TEST_VERIFY_EXIT (fd3 != fd4); TEST_VERIFY_EXIT (fd4 != fd5); /* First the easy part: read from the file descriptor which is supposed to be open. */ TEST_COMPARE (xlseek (fd2, 0, SEEK_CUR), strlen (fd2string)); /* The duped descriptor must have the same position. */ TEST_COMPARE (xlseek (fd4, 0, SEEK_CUR), strlen (fd2string)); TEST_COMPARE (xlseek (fd2, 0, SEEK_SET), 0); TEST_COMPARE (xlseek (fd4, 0, SEEK_CUR), 0); TEST_COMPARE (read (fd2, buf, sizeof buf), strlen (fd2string)); TEST_COMPARE_BLOB (fd2string, strlen (fd2string), buf, strlen (fd2string)); /* Now read from the third file. */ TEST_COMPARE (read (fd3, buf, sizeof buf), strlen (fd3string)); TEST_COMPARE_BLOB (fd3string, strlen (fd3string), buf, strlen (fd3string)); /* Try to write to the file. This should not be allowed. */ TEST_COMPARE (write (fd3, "boo!", 4), -1); TEST_COMPARE (errno, EBADF); /* Now try to read the first file. First make sure it is not opened. */ TEST_COMPARE (lseek (fd1, 0, SEEK_CUR), (off_t) -1); TEST_COMPARE (errno, EBADF); /* Now open the file and read it. */ fd1 = xopen (name, O_RDONLY, 0600); TEST_COMPARE (read (fd1, buf, sizeof buf), strlen (fd1string)); TEST_COMPARE_BLOB (fd1string, strlen (fd1string), buf, strlen (fd1string)); TEST_COMPARE (xlseek (fd5, 0, SEEK_SET), 0); TEST_COMPARE (read (fd5, buf, sizeof buf), strlen (fd5string)); TEST_COMPARE_BLOB (fd5string, strlen (fd5string), buf, strlen (fd5string)); return 0; } static int do_test (int argc, char *argv[]) { pid_t pid; int fd4; int status; posix_spawn_file_actions_t actions; char fd1name[18]; char fd2name[18]; char fd3name[18]; char fd4name[18]; char fd5name[18]; char *name3_copy; char *spargv[13]; int i; /* We must have - one or four parameters left if called initially + path for ld.so optional + "--library-path" optional + the library path optional + the application name - six parameters left if called through re-execution + file descriptor number which is supposed to be closed + the open file descriptor + the newly opened file descriptor + the duped second descriptor + the name of the closed descriptor + the duped fourth file descriptor which O_CLOEXEC should be remove by adddup2. */ if (argc != (restart ? 7 : 2) && argc != (restart ? 7 : 5)) FAIL_EXIT1 ("wrong number of arguments (%d)", argc); if (restart) return handle_restart (argv[1], argv[2], argv[3], argv[4], argv[5], argv[6]); /* Prepare the test. We are creating four files: two which file descriptor will be marked with FD_CLOEXEC, another which is not. */ /* Write something in the files. */ xwrite (temp_fd1, fd1string, strlen (fd1string)); xwrite (temp_fd2, fd2string, strlen (fd2string)); xwrite (temp_fd3, fd3string, strlen (fd3string)); xwrite (temp_fd5, fd5string, strlen (fd5string)); /* Close the third file. It'll be opened by `spawn'. */ xclose (temp_fd3); /* Tell `spawn' what to do. */ TEST_COMPARE (posix_spawn_file_actions_init (&actions), 0); /* Close `temp_fd1'. */ TEST_COMPARE (posix_spawn_file_actions_addclose (&actions, temp_fd1), 0); /* We want to open the third file. */ name3_copy = xstrdup (name3); TEST_COMPARE (posix_spawn_file_actions_addopen (&actions, temp_fd3, name3_copy, O_RDONLY, 0666), 0); /* Overwrite the name to check that a copy has been made. */ memset (name3_copy, 'X', strlen (name3_copy)); /* We dup the second descriptor. */ fd4 = MAX (2, MAX (temp_fd1, MAX (temp_fd2, MAX (temp_fd3, temp_fd5)))) + 1; TEST_COMPARE (posix_spawn_file_actions_adddup2 (&actions, temp_fd2, fd4), 0); /* We clear the O_CLOEXEC on fourth descriptor, so it should be stay open on child. */ TEST_COMPARE (posix_spawn_file_actions_adddup2 (&actions, temp_fd5, temp_fd5), 0); /* Now spawn the process. */ snprintf (fd1name, sizeof fd1name, "%d", temp_fd1); snprintf (fd2name, sizeof fd2name, "%d", temp_fd2); snprintf (fd3name, sizeof fd3name, "%d", temp_fd3); snprintf (fd4name, sizeof fd4name, "%d", fd4); snprintf (fd5name, sizeof fd5name, "%d", temp_fd5); for (i = 0; i < (argc == (restart ? 7 : 5) ? 4 : 1); i++) spargv[i] = argv[i + 1]; spargv[i++] = (char *) "--direct"; spargv[i++] = (char *) "--restart"; spargv[i++] = fd1name; spargv[i++] = fd2name; spargv[i++] = fd3name; spargv[i++] = fd4name; spargv[i++] = name1; spargv[i++] = fd5name; spargv[i] = NULL; TEST_COMPARE (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ), 0); /* Wait for the children. */ TEST_COMPARE (xwaitpid (pid, &status, 0), pid); TEST_VERIFY (WIFEXITED (status)); TEST_VERIFY (!WIFSIGNALED (status)); TEST_COMPARE (WEXITSTATUS (status), 0); /* Same test but with a NULL pid argument. */ TEST_COMPARE (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ), 0); /* Cleanup. */ TEST_COMPARE (posix_spawn_file_actions_destroy (&actions), 0); free (name3_copy); /* Wait for the children. */ xwaitpid (-1, &status, 0); TEST_VERIFY (WIFEXITED (status)); TEST_VERIFY (!WIFSIGNALED (status)); TEST_COMPARE (WEXITSTATUS (status), 0); return 0; } #define TEST_FUNCTION_ARGV do_test #include