/* full-read.c -- an interface to read that retries after interrupts
- Copyright (C) 1993, 1994, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1994, 1997, 1999 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
Return the actual number of bytes read, zero for EOF, or negative
for an error. */
-int
-full_read (desc, ptr, len)
- int desc;
- char *ptr;
- size_t len;
+ssize_t
+full_read (int desc, char *ptr, size_t len)
{
- int n_chars;
-
- if (len <= 0)
- return len;
-
-#ifdef EINTR
- do
+ for (;;)
{
- n_chars = read (desc, ptr, len);
- }
- while (n_chars < 0 && errno == EINTR);
-#else
- n_chars = read (desc, ptr, len);
+ ssize_t n = read (desc, ptr, len);
+#ifdef EINTR
+ if (n < 0 && errno == EINTR)
+ continue;
#endif
-
- return n_chars;
+ return n;
+ }
}
/* full-write.c -- an interface to write that retries after interrupts
- Copyright (C) 1993, 1994, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1994, 1997, 1998, 1999 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
/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
Return LEN upon success, write's (negative) error code otherwise. */
-int
+ssize_t
full_write (int desc, const char *ptr, size_t len)
{
- int total_written;
+ ssize_t total_written = 0;
- total_written = 0;
while (len > 0)
{
- int written = write (desc, ptr, len);
+ ssize_t written = write (desc, ptr, len);
/* FIXME: write on my slackware Linux 1.2.13 returns zero when
I try to write more data than there is room on a floppy disk.
This puts dd into an infinite loop. Reproduce with