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/* Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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.
Bash 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 Bash; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#include <config.h>
#include <sys/types.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <errno.h>
#if !defined (errno)
extern int errno;
#endif
/* Write NB bytes from BUF to file descriptor FD, retrying the write if
it is interrupted. We retry three times if we get a zero-length
write. Any other signal causes this function to return prematurely. */
int
zwrite (fd, buf, nb)
int fd;
char *buf;
size_t nb;
{
int n, i, nt;
for (n = nb, nt = 0;;)
{
i = write (fd, buf, n);
if (i > 0)
{
n -= i;
if (n <= 0)
return nb;
buf += i;
}
else if (i == 0)
{
if (++nt > 3)
return (nb - n);
}
else if (errno != EINTR)
return -1;
}
}
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