/* Tests for spawn. Copyright (C) 2000-2018 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 /* Nonzero if the program gets called via `exec'. */ static int restart; #define CMDLINE_OPTIONS \ { "restart", no_argument, &restart, 1 }, /* Prototype for our test function. */ extern void do_prepare (int argc, char *argv[]); extern int do_test (int argc, char *argv[]); /* We have a preparation function. */ #define PREPARE do_prepare #include "../test-skeleton.c" /* Name of the temporary files. */ static char *name1; static char *name2; static char *name3; /* Descriptors for the temporary files. */ static int temp_fd1 = -1; static int temp_fd2 = -1; static int temp_fd3 = -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"; /* We have a preparation function. */ void do_prepare (int argc, char *argv[]) { /* We must not open any files in the restart case. */ if (restart) return; temp_fd1 = create_temp_file ("spawn", &name1); temp_fd2 = create_temp_file ("spawn", &name2); temp_fd3 = create_temp_file ("spawn", &name3); if (temp_fd1 < 0 || temp_fd2 < 0 || temp_fd3 < 0) exit (1); } static int handle_restart (const char *fd1s, const char *fd2s, const char *fd3s, const char *fd4s, const char *name) { char buf[100]; int fd1; int fd2; int fd3; int fd4; /* First get the descriptors. */ fd1 = atol (fd1s); fd2 = atol (fd2s); fd3 = atol (fd3s); fd4 = atol (fd4s); /* Sanity check. */ if (fd1 == fd2) error (EXIT_FAILURE, 0, "value of fd1 and fd2 is the same"); if (fd1 == fd3) error (EXIT_FAILURE, 0, "value of fd1 and fd3 is the same"); if (fd1 == fd4) error (EXIT_FAILURE, 0, "value of fd1 and fd4 is the same"); if (fd2 == fd3) error (EXIT_FAILURE, 0, "value of fd2 and fd3 is the same"); if (fd2 == fd4) error (EXIT_FAILURE, 0, "value of fd2 and fd4 is the same"); if (fd3 == fd4) error (EXIT_FAILURE, 0, "value of fd3 and fd4 is the same"); /* First the easy part: read from the file descriptor which is supposed to be open. */ if (lseek (fd2, 0, SEEK_CUR) != strlen (fd2string)) error (EXIT_FAILURE, errno, "file 2 not in right position"); /* The duped descriptor must have the same position. */ if (lseek (fd4, 0, SEEK_CUR) != strlen (fd2string)) error (EXIT_FAILURE, errno, "file 4 not in right position"); if (lseek (fd2, 0, SEEK_SET) != 0) error (EXIT_FAILURE, 0, "cannot reset position in file 2"); if (lseek (fd4, 0, SEEK_CUR) != 0) error (EXIT_FAILURE, errno, "file 4 not set back, too"); if (read (fd2, buf, sizeof buf) != strlen (fd2string)) error (EXIT_FAILURE, 0, "cannot read file 2"); if (memcmp (fd2string, buf, strlen (fd2string)) != 0) error (EXIT_FAILURE, 0, "file 2 does not match"); /* Now read from the third file. */ if (read (fd3, buf, sizeof buf) != strlen (fd3string)) error (EXIT_FAILURE, 0, "cannot read file 3"); if (memcmp (fd3string, buf, strlen (fd3string)) != 0) error (EXIT_FAILURE, 0, "file 3 does not match"); /* Try to write to the file. This should not be allowed. */ if (write (fd3, "boo!", 4) != -1 || errno != EBADF) error (EXIT_FAILURE, 0, "file 3 is writable"); /* Now try to read the first file. First make sure it is not opened. */ if (lseek (fd1, 0, SEEK_CUR) != (off_t) -1 || errno != EBADF) error (EXIT_FAILURE, 0, "file 1 (%d) is not closed", fd1); /* Now open the file and read it. */ fd1 = open (name, O_RDONLY); if (fd1 == -1) error (EXIT_FAILURE, errno, "cannot open first file \"%s\" for verification", name); if (read (fd1, buf, sizeof buf) != strlen (fd1string)) error (EXIT_FAILURE, errno, "cannot read file 1"); if (memcmp (fd1string, buf, strlen (fd1string)) != 0) error (EXIT_FAILURE, 0, "file 1 does not match"); return 0; } 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 *name3_copy; char *spargv[12]; 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 - five 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 + thhe duped second descriptor + the name of the closed descriptor */ if (argc != (restart ? 6 : 2) && argc != (restart ? 6 : 5)) error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc); if (restart) return handle_restart (argv[1], argv[2], argv[3], argv[4], argv[5]); /* Prepare the test. We are creating two files: one which file descriptor will be marked with FD_CLOEXEC, another which is not. */ /* Write something in the files. */ if (write (temp_fd1, fd1string, strlen (fd1string)) != strlen (fd1string)) error (EXIT_FAILURE, errno, "cannot write to first file"); if (write (temp_fd2, fd2string, strlen (fd2string)) != strlen (fd2string)) error (EXIT_FAILURE, errno, "cannot write to second file"); if (write (temp_fd3, fd3string, strlen (fd3string)) != strlen (fd3string)) error (EXIT_FAILURE, errno, "cannot write to third file"); /* Close the third file. It'll be opened by `spawn'. */ close (temp_fd3); /* Tell `spawn' what to do. */ if (posix_spawn_file_actions_init (&actions) != 0) error (EXIT_FAILURE, errno, "posix_spawn_file_actions_init"); /* Close `temp_fd1'. */ if (posix_spawn_file_actions_addclose (&actions, temp_fd1) != 0) error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addclose"); /* We want to open the third file. */ name3_copy = strdup (name3); if (name3_copy == NULL) error (EXIT_FAILURE, errno, "strdup"); if (posix_spawn_file_actions_addopen (&actions, temp_fd3, name3_copy, O_RDONLY, 0666) != 0) error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addopen"); /* 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, temp_fd3))) + 1; if (posix_spawn_file_actions_adddup2 (&actions, temp_fd2, fd4) != 0) error (EXIT_FAILURE, errno, "posix_spawn_file_actions_adddup2"); /* 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); for (i = 0; i < (argc == (restart ? 6 : 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] = NULL; if (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ) != 0) error (EXIT_FAILURE, errno, "posix_spawn"); /* Same test but with a NULL pid argument. */ if (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ) != 0) error (EXIT_FAILURE, errno, "posix_spawn"); /* Cleanup. */ if (posix_spawn_file_actions_destroy (&actions) != 0) error (EXIT_FAILURE, errno, "posix_spawn_file_actions_destroy"); free (name3_copy); /* Wait for the children. */ TEST_VERIFY (xwaitpid (pid, &status, 0) == pid); TEST_VERIFY (WIFEXITED (status)); TEST_VERIFY (!WIFSIGNALED (status)); TEST_VERIFY (WEXITSTATUS (status) == 0); xwaitpid (-1, &status, 0); TEST_VERIFY (WIFEXITED (status)); TEST_VERIFY (!WIFSIGNALED (status)); TEST_VERIFY (WEXITSTATUS (status) == 0); return 0; }