| /* Tests for ftruncate and truncate. |
| Copyright (C) 2000 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <error.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/stat.h> |
| |
| |
| /* Allow testing of the 64-bit versions as well. */ |
| #ifndef TRUNCATE |
| # define TRUNCATE truncate |
| # define FTRUNCATE ftruncate |
| #endif |
| |
| #define STRINGIFY(s) STRINGIFY2 (s) |
| #define STRINGIFY2(s) #s |
| |
| /* 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 |
| |
| /* We might need a bit longer timeout. */ |
| #define TIMEOUT 20 /* sec */ |
| |
| /* This defines the `main' function and some more. */ |
| #include <test-skeleton.c> |
| |
| /* These are for the temporary file we generate. */ |
| char *name; |
| int fd; |
| |
| void |
| do_prepare (int argc, char *argv[]) |
| { |
| size_t name_len; |
| |
| #define FNAME FNAME2(TRUNCATE) |
| #define FNAME2(s) "/" STRINGIFY(s) "XXXXXX" |
| |
| name_len = strlen (test_dir); |
| name = malloc (name_len + sizeof (FNAME)); |
| mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME)); |
| add_temp_file (name); |
| |
| /* Open our test file. */ |
| fd = mkstemp (name); |
| if (fd == -1) |
| error (EXIT_FAILURE, errno, "cannot open test file `%s'", name); |
| } |
| |
| |
| int |
| do_test (int argc, char *argv[]) |
| { |
| struct stat st; |
| char buf[1000]; |
| |
| memset (buf, '\0', sizeof (buf)); |
| |
| if (write (fd, buf, sizeof (buf)) != sizeof (buf)) |
| error (EXIT_FAILURE, errno, "during write"); |
| |
| if (fstat (fd, &st) < 0 || st.st_size != sizeof (buf)) |
| error (EXIT_FAILURE, 0, "initial size wrong"); |
| |
| |
| if (FTRUNCATE (fd, 800) < 0) |
| error (EXIT_FAILURE, errno, "size reduction with %s failed", |
| STRINGIFY (FTRUNCATE)); |
| |
| if (fstat (fd, &st) < 0 || st.st_size != 800) |
| error (EXIT_FAILURE, 0, "size after reduction with %s incorrect", |
| STRINGIFY (FTRUNCATE)); |
| |
| /* The following test covers more than POSIX. POSIX does not require |
| that ftruncate() can increase the file size. But we are testing |
| Unix systems. */ |
| if (FTRUNCATE (fd, 1200) < 0) |
| error (EXIT_FAILURE, errno, "size increase with %s failed", |
| STRINGIFY (FTRUNCATE)); |
| |
| if (fstat (fd, &st) < 0 || st.st_size != 1200) |
| error (EXIT_FAILURE, 0, "size after increase with %s incorrect", |
| STRINGIFY (FTRUNCATE)); |
| |
| |
| if (TRUNCATE (name, 800) < 0) |
| error (EXIT_FAILURE, errno, "size reduction with %s failed", |
| STRINGIFY (TRUNCATE)); |
| |
| if (fstat (fd, &st) < 0 || st.st_size != 800) |
| error (EXIT_FAILURE, 0, "size after reduction with %s incorrect", |
| STRINGIFY (TRUNCATE)); |
| |
| /* The following test covers more than POSIX. POSIX does not require |
| that truncate() can increase the file size. But we are testing |
| Unix systems. */ |
| if (TRUNCATE (name, 1200) < 0) |
| error (EXIT_FAILURE, errno, "size increase with %s failed", |
| STRINGIFY (TRUNCATE)); |
| |
| if (fstat (fd, &st) < 0 || st.st_size != 1200) |
| error (EXIT_FAILURE, 0, "size after increase with %s incorrect", |
| STRINGIFY (TRUNCATE)); |
| |
| |
| close (fd); |
| unlink (name); |
| |
| return 0; |
| } |