diff options
Diffstat (limited to 'lib/full-write.c')
| -rw-r--r-- | lib/full-write.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/lib/full-write.c b/lib/full-write.c deleted file mode 100644 index 106f3c7e..00000000 --- a/lib/full-write.c +++ /dev/null | |||
| @@ -1,83 +0,0 @@ | |||
| 1 | /* An interface to read and write that retries (if necessary) until complete. | ||
| 2 | |||
| 3 | Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003, | ||
| 4 | 2004 Free Software Foundation, Inc. | ||
| 5 | |||
| 6 | This program is free software; you can redistribute it and/or modify | ||
| 7 | it under the terms of the GNU General Public License as published by | ||
| 8 | the Free Software Foundation; either version 2, or (at your option) | ||
| 9 | any later version. | ||
| 10 | |||
| 11 | This program is distributed in the hope that it will be useful, | ||
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 14 | GNU General Public License for more details. | ||
| 15 | |||
| 16 | You should have received a copy of the GNU General Public License | ||
| 17 | along with this program; if not, write to the Free Software Foundation, | ||
| 18 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | ||
| 19 | |||
| 20 | #ifdef HAVE_CONFIG_H | ||
| 21 | # include <config.h> | ||
| 22 | #endif | ||
| 23 | |||
| 24 | /* Specification. */ | ||
| 25 | #ifdef FULL_READ | ||
| 26 | # include "full-read.h" | ||
| 27 | #else | ||
| 28 | # include "full-write.h" | ||
| 29 | #endif | ||
| 30 | |||
| 31 | #include <errno.h> | ||
| 32 | |||
| 33 | #ifdef FULL_READ | ||
| 34 | # include "safe-read.h" | ||
| 35 | # define safe_rw safe_read | ||
| 36 | # define full_rw full_read | ||
| 37 | # undef const | ||
| 38 | # define const /* empty */ | ||
| 39 | #else | ||
| 40 | # include "safe-write.h" | ||
| 41 | # define safe_rw safe_write | ||
| 42 | # define full_rw full_write | ||
| 43 | #endif | ||
| 44 | |||
| 45 | #ifdef FULL_READ | ||
| 46 | /* Set errno to zero upon EOF. */ | ||
| 47 | # define ZERO_BYTE_TRANSFER_ERRNO 0 | ||
| 48 | #else | ||
| 49 | /* Some buggy drivers return 0 when one tries to write beyond | ||
| 50 | a device's end. (Example: Linux 1.2.13 on /dev/fd0.) | ||
| 51 | Set errno to ENOSPC so they get a sensible diagnostic. */ | ||
| 52 | # define ZERO_BYTE_TRANSFER_ERRNO ENOSPC | ||
| 53 | #endif | ||
| 54 | |||
| 55 | /* Write(read) COUNT bytes at BUF to(from) descriptor FD, retrying if | ||
| 56 | interrupted or if a partial write(read) occurs. Return the number | ||
| 57 | of bytes transferred. | ||
| 58 | When writing, set errno if fewer than COUNT bytes are written. | ||
| 59 | When reading, if fewer than COUNT bytes are read, you must examine | ||
| 60 | errno to distinguish failure from EOF (errno == 0). */ | ||
| 61 | size_t | ||
| 62 | full_rw (int fd, const void *buf, size_t count) | ||
| 63 | { | ||
| 64 | size_t total = 0; | ||
| 65 | const char *ptr = buf; | ||
| 66 | |||
| 67 | while (count > 0) | ||
| 68 | { | ||
| 69 | size_t n_rw = safe_rw (fd, ptr, count); | ||
| 70 | if (n_rw == (size_t) -1) | ||
| 71 | break; | ||
| 72 | if (n_rw == 0) | ||
| 73 | { | ||
| 74 | errno = ZERO_BYTE_TRANSFER_ERRNO; | ||
| 75 | break; | ||
| 76 | } | ||
| 77 | total += n_rw; | ||
| 78 | ptr += n_rw; | ||
| 79 | count -= n_rw; | ||
| 80 | } | ||
| 81 | |||
| 82 | return total; | ||
| 83 | } | ||
