diff options
author | Jim Meyering <jim@meyering.net> | 1993-12-29 06:13:37 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1993-12-29 06:13:37 +0000 |
commit | 8067b6fb73fadebad4671a096b9b07c8dae9c3f8 (patch) | |
tree | c65878804fa78165b67328f88f73716c8495d242 /lib/full-write.c | |
parent | 9a30fc037ef27fe8401af33aaed39e725c4f1004 (diff) | |
download | coreutils-8067b6fb73fadebad4671a096b9b07c8dae9c3f8.tar.xz |
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Diffstat (limited to 'lib/full-write.c')
-rw-r--r-- | lib/full-write.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/lib/full-write.c b/lib/full-write.c new file mode 100644 index 000000000..3fca56b0e --- /dev/null +++ b/lib/full-write.c @@ -0,0 +1,67 @@ +/* safe-write.c -- an interface to write that retries after interrupts + Copyright (C) 1993 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + Copied largely from GNU C's cccp.c. + */ + +#ifdef HAVE_CONFIG_H +#if defined (CONFIG_BROKETS) +/* We use <config.h> instead of "config.h" so that a compilation + using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h + (which it would do because it found this file in $srcdir). */ +#include <config.h> +#else +#include "config.h" +#endif +#endif + +#include <sys/types.h> + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include <errno.h> +#ifndef STDC_HEADERS +extern int errno; +#endif + +/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. + Return zero upon success, write's (negative) error code otherwise. */ + +int +safe_write (desc, ptr, len) + int desc; + char *ptr; + int len; +{ + while (len > 0) + { + int written = write (desc, ptr, len); + if (written < 0) + { +#ifdef EINTR + if (errno == EINTR) + continue; +#endif + return written; + } + ptr += written; + len -= written; + } + return 0; +} |