2005-09-10 02:47:19 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
2005-04-21 23:24:46 +00:00
|
|
|
/*
|
|
|
|
* sum -- checksum and count the blocks in a file
|
|
|
|
* Like BSD sum or SysV sum -r, except like SysV sum if -s option is given.
|
|
|
|
*
|
|
|
|
* Copyright (C) 86, 89, 91, 1995-2002, 2004 Free Software Foundation, Inc.
|
|
|
|
* Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
|
|
|
|
* Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
|
|
|
|
*
|
|
|
|
* Written by Kayvan Aghaiepour and David MacKenzie
|
|
|
|
* Taken from coreutils and turned into a busybox applet by Mike Frysinger
|
|
|
|
*
|
2006-09-13 16:39:19 +00:00
|
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
2005-04-21 23:24:46 +00:00
|
|
|
*/
|
|
|
|
|
2005-09-10 02:47:19 +00:00
|
|
|
#include "busybox.h"
|
2005-04-21 23:24:46 +00:00
|
|
|
|
|
|
|
/* 1 if any of the files read were the standard input */
|
|
|
|
static int have_read_stdin;
|
|
|
|
|
|
|
|
/* Calculate and print the rotated checksum and the size in 1K blocks
|
|
|
|
of file FILE, or of the standard input if FILE is "-".
|
|
|
|
If PRINT_NAME is >1, print FILE next to the checksum and size.
|
|
|
|
The checksum varies depending on sizeof (int).
|
|
|
|
Return 1 if successful. */
|
|
|
|
static int bsd_sum_file(const char *file, int print_name)
|
|
|
|
{
|
2006-02-14 17:47:05 +00:00
|
|
|
FILE *fp;
|
|
|
|
int checksum = 0; /* The checksum mod 2^16. */
|
|
|
|
uintmax_t total_bytes = 0; /* The number of bytes. */
|
|
|
|
int ch; /* Each character read. */
|
2006-08-28 23:31:54 +00:00
|
|
|
int ret = 0;
|
2005-04-21 23:24:46 +00:00
|
|
|
|
2006-12-16 23:49:13 +00:00
|
|
|
if (LONE_DASH(file)) {
|
2005-04-21 23:24:46 +00:00
|
|
|
fp = stdin;
|
2006-08-28 23:31:54 +00:00
|
|
|
have_read_stdin++;
|
2005-04-21 23:24:46 +00:00
|
|
|
} else {
|
2006-10-26 23:25:17 +00:00
|
|
|
fp = fopen_or_warn(file, "r");
|
2005-05-16 22:35:59 +00:00
|
|
|
if (fp == NULL)
|
2006-08-28 23:31:54 +00:00
|
|
|
goto out;
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
while ((ch = getc(fp)) != EOF) {
|
|
|
|
++total_bytes;
|
|
|
|
checksum = (checksum >> 1) + ((checksum & 1) << 15);
|
|
|
|
checksum += ch;
|
|
|
|
checksum &= 0xffff; /* Keep it within bounds. */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ferror(fp)) {
|
2005-05-16 22:35:59 +00:00
|
|
|
bb_perror_msg(file);
|
2006-10-26 23:25:17 +00:00
|
|
|
fclose_if_not_stdin(fp);
|
2006-08-28 23:31:54 +00:00
|
|
|
goto out;
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
|
|
|
|
2006-10-26 23:25:17 +00:00
|
|
|
if (fclose_if_not_stdin(fp) == EOF) {
|
2005-05-16 22:35:59 +00:00
|
|
|
bb_perror_msg(file);
|
2006-08-28 23:31:54 +00:00
|
|
|
goto out;
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
2006-08-28 23:31:54 +00:00
|
|
|
ret++;
|
2006-02-14 17:47:05 +00:00
|
|
|
printf("%05d %5ju ", checksum, (total_bytes+1023)/1024);
|
2005-04-21 23:24:46 +00:00
|
|
|
if (print_name > 1)
|
2005-05-16 22:35:59 +00:00
|
|
|
puts(file);
|
|
|
|
else
|
2006-10-26 00:37:00 +00:00
|
|
|
puts("");
|
2006-08-28 23:31:54 +00:00
|
|
|
out:
|
|
|
|
return ret;
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate and print the checksum and the size in 512-byte blocks
|
|
|
|
of file FILE, or of the standard input if FILE is "-".
|
|
|
|
If PRINT_NAME is >0, print FILE next to the checksum and size.
|
|
|
|
Return 1 if successful. */
|
2005-09-10 04:10:18 +00:00
|
|
|
#define MY_BUF_SIZE 8192
|
2005-04-21 23:24:46 +00:00
|
|
|
static int sysv_sum_file(const char *file, int print_name)
|
|
|
|
{
|
2006-04-10 16:40:47 +00:00
|
|
|
RESERVE_CONFIG_BUFFER(buf, MY_BUF_SIZE);
|
2005-04-21 23:24:46 +00:00
|
|
|
int fd;
|
|
|
|
uintmax_t total_bytes = 0;
|
|
|
|
|
|
|
|
/* The sum of all the input bytes, modulo (UINT_MAX + 1). */
|
|
|
|
unsigned int s = 0;
|
|
|
|
|
2006-12-16 23:49:13 +00:00
|
|
|
if (LONE_DASH(file)) {
|
2005-04-21 23:24:46 +00:00
|
|
|
fd = 0;
|
|
|
|
have_read_stdin = 1;
|
|
|
|
} else {
|
|
|
|
fd = open(file, O_RDONLY);
|
2005-09-10 04:10:18 +00:00
|
|
|
if (fd == -1)
|
|
|
|
goto release_and_ret;
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
while (1) {
|
2005-09-10 02:47:19 +00:00
|
|
|
size_t bytes_read = safe_read(fd, buf, MY_BUF_SIZE);
|
2005-04-21 23:24:46 +00:00
|
|
|
|
|
|
|
if (bytes_read == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (bytes_read == -1) {
|
2005-09-10 04:10:18 +00:00
|
|
|
release_and_ret:
|
2005-05-16 22:35:59 +00:00
|
|
|
bb_perror_msg(file);
|
2005-09-10 04:10:18 +00:00
|
|
|
RELEASE_CONFIG_BUFFER(buf);
|
2006-12-16 23:49:13 +00:00
|
|
|
if (NOT_LONE_DASH(file))
|
2005-04-21 23:24:46 +00:00
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
total_bytes += bytes_read;
|
2005-09-10 04:10:18 +00:00
|
|
|
while (bytes_read--)
|
|
|
|
s += buf[bytes_read];
|
2005-04-21 23:24:46 +00:00
|
|
|
}
|
|
|
|
|
2006-12-16 23:49:13 +00:00
|
|
|
if (NOT_LONE_DASH(file) && close(fd) == -1)
|
2005-09-10 04:10:18 +00:00
|
|
|
goto release_and_ret;
|
|
|
|
else
|
|
|
|
RELEASE_CONFIG_BUFFER(buf);
|
2005-04-21 23:24:46 +00:00
|
|
|
|
2005-09-10 02:47:19 +00:00
|
|
|
{
|
|
|
|
int r = (s & 0xffff) + ((s & 0xffffffff) >> 16);
|
2005-09-10 04:10:18 +00:00
|
|
|
s = (r & 0xffff) + (r >> 16);
|
2005-04-21 23:24:46 +00:00
|
|
|
|
2006-02-14 17:47:05 +00:00
|
|
|
printf("%d %ju ", s, (total_bytes+511)/512);
|
2005-09-10 04:10:18 +00:00
|
|
|
}
|
2005-09-10 02:47:19 +00:00
|
|
|
puts(print_name ? file : "");
|
2005-04-21 23:24:46 +00:00
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int sum_main(int argc, char **argv)
|
|
|
|
{
|
|
|
|
int flags;
|
|
|
|
int ok;
|
|
|
|
int (*sum_func)(const char *, int) = bsd_sum_file;
|
|
|
|
|
|
|
|
/* give the bsd func priority over sysv func */
|
2006-10-03 21:00:06 +00:00
|
|
|
flags = getopt32(argc, argv, "sr");
|
2005-04-21 23:24:46 +00:00
|
|
|
if (flags & 1)
|
|
|
|
sum_func = sysv_sum_file;
|
|
|
|
if (flags & 2)
|
|
|
|
sum_func = bsd_sum_file;
|
|
|
|
|
|
|
|
have_read_stdin = 0;
|
2005-09-10 04:10:18 +00:00
|
|
|
if ((argc - optind) == 0)
|
|
|
|
ok = sum_func("-", 0);
|
2005-04-21 23:24:46 +00:00
|
|
|
else
|
|
|
|
for (ok = 1; optind < argc; optind++)
|
2005-09-10 04:10:18 +00:00
|
|
|
ok &= sum_func(argv[optind], 1);
|
2005-04-21 23:24:46 +00:00
|
|
|
|
|
|
|
if (have_read_stdin && fclose(stdin) == EOF)
|
|
|
|
bb_perror_msg_and_die("-");
|
|
|
|
|
|
|
|
exit(ok ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
|
|
}
|