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Diffstat (limited to 'REORG.TODO/posix/tst-exec.c')
| -rw-r--r-- | REORG.TODO/posix/tst-exec.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/REORG.TODO/posix/tst-exec.c b/REORG.TODO/posix/tst-exec.c new file mode 100644 index 0000000000..12a0f57114 --- /dev/null +++ b/REORG.TODO/posix/tst-exec.c @@ -0,0 +1,199 @@ +/* Tests for exec. + Copyright (C) 2000-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 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 + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <error.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <wait.h> + + +/* 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; + +/* File descriptors for these temporary files. */ +static int temp_fd1 = -1; +static int temp_fd2 = -1; + +/* 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[]) +{ + /* We must not open any files in the restart case. */ + if (restart) + return; + + temp_fd1 = create_temp_file ("exec", &name1); + temp_fd2 = create_temp_file ("exec", &name2); + if (temp_fd1 < 0 || temp_fd2 < 0) + exit (1); +} + + +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 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. */ + + /* Set the bit. */ + flags = fcntl (temp_fd1, F_GETFD, 0); + if (flags < 0) + error (EXIT_FAILURE, errno, "cannot get flags"); + flags |= FD_CLOEXEC; + if (fcntl (temp_fd1, F_SETFD, flags) < 0) + error (EXIT_FAILURE, errno, "cannot set flags"); + + /* 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"); + + /* 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", temp_fd1); + snprintf (fd2name, sizeof fd2name, "%d", temp_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); + + return status; +} |