/* 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; }