/* Tests for exec. Copyright (C) 2000-2016 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 /* 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; /* The contents of our files. */ static const char fd1string[] = "This file should get closed"; static const char fd2string[] = "This file should stay opened"; /* We have a preparation function. */ void do_prepare (int argc, char *argv[]) { size_t name_len; name_len = strlen (test_dir); name1 = malloc (name_len + sizeof ("/execXXXXXX")); mempcpy (mempcpy (name1, test_dir, name_len), "/execXXXXXX", sizeof ("/execXXXXXX")); add_temp_file (name1); name2 = malloc (name_len + sizeof ("/execXXXXXX")); mempcpy (mempcpy (name2, test_dir, name_len), "/execXXXXXX", sizeof ("/execXXXXXX")); add_temp_file (name2); } static int handle_restart (const char *fd1s, const char *fd2s, const char *name) { char buf[100]; int fd1; int fd2; /* First get the descriptors. */ fd1 = atol (fd1s); fd2 = atol (fd2s); /* Sanity check. */ if (fd1 == fd2) error (EXIT_FAILURE, 0, "value of fd1 and fd2 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"); if (lseek (fd2, 0, SEEK_SET) != 0) error (EXIT_FAILURE, 0, "cannot reset position in file 2"); 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"); /* No 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 fd1; int fd2; int flags; int status; /* 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 - three parameters left if called through re-execution + file descriptor number which is supposed to be closed + the open file descriptor + the name of the closed desriptor */ if (restart) { if (argc != 4) error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc); return handle_restart (argv[1], argv[2], argv[3]); } if (argc != 2 && argc != 5) error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc); /* Prepare the test. We are creating two files: one which file descriptor will be marked with FD_CLOEXEC, another which is not. */ /* Open our test files. */ fd1 = mkstemp (name1); if (fd1 == -1) error (EXIT_FAILURE, errno, "cannot open test file `%s'", name1); fd2 = mkstemp (name2); if (fd2 == -1) error (EXIT_FAILURE, errno, "cannot open test file `%s'", name2); /* Set the bit. */ flags = fcntl (fd1, F_GETFD, 0); if (flags < 0) error (EXIT_FAILURE, errno, "cannot get flags"); flags |= FD_CLOEXEC; if (fcntl (fd1, F_SETFD, flags) < 0) error (EXIT_FAILURE, errno, "cannot set flags"); /* Write something in the files. */ if (write (fd1, fd1string, strlen (fd1string)) != strlen (fd1string)) error (EXIT_FAILURE, errno, "cannot write to first file"); if (write (fd2, fd2string, strlen (fd2string)) != strlen (fd2string)) error (EXIT_FAILURE, errno, "cannot write to second file"); /* We want to test the `exec' function. To do this we restart the program with an additional parameter. But first create another process. */ pid = fork (); if (pid == 0) { char fd1name[18]; char fd2name[18]; snprintf (fd1name, sizeof fd1name, "%d", fd1); snprintf (fd2name, sizeof fd2name, "%d", fd2); /* This is the child. Construct the command line. */ if (argc == 5) execl (argv[1], argv[1], argv[2], argv[3], argv[4], "--direct", "--restart", fd1name, fd2name, name1, NULL); else execl (argv[1], argv[1], "--direct", "--restart", fd1name, fd2name, name1, NULL); error (EXIT_FAILURE, errno, "cannot exec"); } else if (pid == (pid_t) -1) error (EXIT_FAILURE, errno, "cannot fork"); /* Wait for the child. */ if (waitpid (pid, &status, 0) != pid) error (EXIT_FAILURE, errno, "wrong child"); if (WTERMSIG (status) != 0) error (EXIT_FAILURE, 0, "Child terminated incorrectly"); status = WEXITSTATUS (status); /* Remove the test files. */ unlink (name1); unlink (name2); return status; }