diff options
Diffstat (limited to 'package/heirloom-cpio/src/sfile.c')
| -rw-r--r-- | package/heirloom-cpio/src/sfile.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/package/heirloom-cpio/src/sfile.c b/package/heirloom-cpio/src/sfile.c deleted file mode 100644 index 089d85fdf..000000000 --- a/package/heirloom-cpio/src/sfile.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Copyright (c) 2003 Gunnar Ritter - * - * This software is provided 'as-is', without any express or implied - * warranty. In no event will the authors be held liable for any damages - * arising from the use of this software. - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute - * it freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must not - * claim that you wrote the original software. If you use this software - * in a product, an acknowledgment in the product documentation would be - * appreciated but is not required. - * - * 2. Altered source versions must be plainly marked as such, and must not be - * misrepresented as being the original software. - * - * 3. This notice may not be removed or altered from any source distribution. - */ -/* Sccsid @(#)sfile.c 1.9 (gritter) 6/7/04 */ - -#ifdef __linux__ -#undef _FILE_OFFSET_BITS - -#include <sys/types.h> -#include <sys/sendfile.h> -#include <sys/stat.h> -#include <unistd.h> -#include <limits.h> -#include <errno.h> -#include "sfile.h" - -long long -sfile(int dfd, int sfd, mode_t mode, long long count) -{ - static int enosys, einval, success; - off_t offset; - ssize_t sent, total; - extern void writerr(void *, int, int); - /* - * A process is not interruptible while executing a sendfile() - * system call. So it is not advisable to to send an entire - * file with one call; it is sent in parts so signals can - * be delivered in between. - */ - const ssize_t chunk = 196608; - - /* - * If a previous call returned ENOSYS, the operating system does - * not support sendfile() at all and it makes no sense to try it - * again. - * - * If a previous call returned EINVAL and there was no successful - * call yet, it is very likely that this is a permanent error - * condition (on Linux 2.6.0-test4, sendfile() may be used for - * socket targets only; older versions don't support tmpfs as - * source file system etc.). - */ - if (enosys || !success && einval || - (mode&S_IFMT) != S_IFREG || count > SSIZE_MAX) - return 0; - offset = lseek(sfd, 0, SEEK_CUR); - sent = 0, total = 0; - while (count > 0 && (sent = sendfile(dfd, sfd, &offset, - count > chunk ? chunk : count)) > 0) { - count -= sent, total += sent; - } - if (total && lseek(sfd, offset, SEEK_SET) == (off_t)-1) - return -1; - if (count == 0 || sent == 0) { - success = 1; - return total; - } - switch (errno) { - case ENOSYS: - enosys = 1; - return 0; - case EINVAL: - einval = 1; - return 0; - case ENOMEM: - return 0; - default: - writerr(NULL, count > chunk ? chunk : count, 0); - return -1; - } -} -#else /* !__linux__ */ -#include <sys/types.h> - -/*ARGSUSED*/ -long long -sfile(int dfd, int sfd, mode_t mode, long long count) -{ - return 0; -} -#endif /* __linux__ */ |