vasilito
facf0c92e0
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Test the write() function.
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Copyright (C) 2011-2024 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (write, ssize_t, (int, const void *, size_t));
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include "macros.h"
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int
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main (void)
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{
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const char *filename = "test-write.tmp";
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int fd;
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/* Create a file with a simple contents. */
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fd = open (filename, O_CREAT | O_WRONLY, 0600);
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ASSERT (fd >= 0);
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ASSERT (write (fd, "Hello World", 11) == 11);
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ASSERT (close (fd) == 0);
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/* Write into the middle of the file. */
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fd = open (filename, O_WRONLY);
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ASSERT (fd >= 0);
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ASSERT (lseek (fd, 6, SEEK_SET) == 6);
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ASSERT (write (fd, "fascination", 11) == 11);
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/* Verify the contents of the file. */
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{
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char buf[64];
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int rfd = open (filename, O_RDONLY);
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ASSERT (rfd >= 0);
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ASSERT (read (rfd, buf, sizeof (buf)) == 17);
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ASSERT (close (rfd) == 0);
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ASSERT (memcmp (buf, "Hello fascination", 17) == 0);
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}
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ASSERT (close (fd) == 0);
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/* Test behaviour for invalid file descriptors. */
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{
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char byte = 'x';
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errno = 0;
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ASSERT (write (-1, &byte, 1) == -1);
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ASSERT (errno == EBADF);
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}
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{
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char byte = 'x';
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close (99);
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errno = 0;
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ASSERT (write (99, &byte, 1) == -1);
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ASSERT (errno == EBADF);
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}
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/* Clean up. */
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unlink (filename);
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return 0;
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}
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