mirror of
https://github.com/sheumann/hush.git
synced 2024-11-01 10:06:40 +00:00
19ced5c425
function old new delta bb_putchar_stderr - 24 +24 ParseField 494 471 -23 progress_meter 212 188 -24 xargs_main 888 842 -46 pipe_progress_main 151 105 -46 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/4 up/down: 24/-139) Total: -115 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
#include "libbb.h"
|
|
|
|
ssize_t FAST_FUNC safe_read(int fd, void *buf, size_t count)
|
|
{
|
|
ssize_t n;
|
|
|
|
do {
|
|
n = read(fd, buf, count);
|
|
} while (n < 0 && errno == EINTR);
|
|
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Read all of the supplied buffer from a file.
|
|
* This does multiple reads as necessary.
|
|
* Returns the amount read, or -1 on an error.
|
|
* A short read is returned on an end of file.
|
|
*/
|
|
ssize_t FAST_FUNC full_read(int fd, void *buf, size_t len)
|
|
{
|
|
ssize_t cc;
|
|
ssize_t total;
|
|
|
|
total = 0;
|
|
|
|
while (len) {
|
|
cc = safe_read(fd, buf, len);
|
|
|
|
if (cc < 0) {
|
|
if (total) {
|
|
/* we already have some! */
|
|
/* user can do another read to know the error code */
|
|
return total;
|
|
}
|
|
return cc; /* read() returns -1 on failure. */
|
|
}
|
|
if (cc == 0)
|
|
break;
|
|
buf = ((char *)buf) + cc;
|
|
total += cc;
|
|
len -= cc;
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
ssize_t FAST_FUNC read_close(int fd, void *buf, size_t size)
|
|
{
|
|
/*int e;*/
|
|
size = full_read(fd, buf, size);
|
|
/*e = errno;*/
|
|
close(fd);
|
|
/*errno = e;*/
|
|
return size;
|
|
}
|
|
|
|
ssize_t FAST_FUNC open_read_close(const char *filename, void *buf, size_t size)
|
|
{
|
|
int fd = open(filename, O_RDONLY);
|
|
if (fd < 0)
|
|
return fd;
|
|
return read_close(fd, buf, size);
|
|
}
|