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/*
* userv - both.c
* Useful very-low-level utility routines, used in both client and daemon.
* These do not (and cannot) depend on infrastructure eg syscallerror,
* because these are not the same.
*
* Copyright (C)1999 Ian Jackson
*
* This 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 of the License, 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 userv; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Some nasty people can return 0/EOF + EINTR from stdio !
* These functions attempt to work around this braindamage by retrying
* the call after clearerr. If this doesn't work then clearly your
* libc is _completely_ fubar rather than just somewhat fubar.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "both.h"
int working_getc(FILE *file) {
int c;
for (;;) {
c= getc(file);
if (c != EOF || errno != EINTR) return c;
clearerr(file);
}
}
size_t working_fread(void *ptr, size_t sz, FILE *file) {
size_t done, nr;
done= 0;
for (;;) {
nr= fread((char*)ptr + done, 1, sz-done, file);
done += nr;
if (done == sz || !ferror(file) || errno != EINTR) return done;
clearerr(file);
}
}
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