/* sum -- checksum and count the blocks in a file
- Copyright (C) 86, 89, 91, 1995-2002, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1986-2013 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Like BSD sum or SysV sum -r, except like SysV sum if -s option is given. */
#include <getopt.h>
#include "system.h"
#include "error.h"
+#include "fadvise.h"
#include "human.h"
#include "safe-read.h"
+#include "xfreopen.h"
-/* The official name of this program (e.g., no `g' prefix). */
+/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "sum"
-#define AUTHORS "Kayvan Aghaiepour", "David MacKenzie"
+#define AUTHORS \
+ proper_name ("Kayvan Aghaiepour"), \
+ proper_name ("David MacKenzie")
-/* The name this program was run with. */
-char *program_name;
-
-/* Nonzero if any of the files read were the standard input. */
-static int have_read_stdin;
+/* True if any of the files read were the standard input. */
+static bool have_read_stdin;
static struct option const longopts[] =
{
usage (int status)
{
if (status != EXIT_SUCCESS)
- fprintf (stderr, _("Try `%s --help' for more information.\n"),
- program_name);
+ emit_try_help ();
else
{
printf (_("\
Usage: %s [OPTION]... [FILE]...\n\
"),
- program_name);
+ program_name);
fputs (_("\
Print checksum and block counts for each FILE.\n\
\n\
- -r defeat -s, use BSD sum algorithm, use 1K blocks\n\
+ -r use BSD sum algorithm, use 1K blocks\n\
-s, --sysv use System V sum algorithm, use 512 bytes blocks\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
\n\
With no FILE, or when FILE is -, read standard input.\n\
"), stdout);
- printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
+ emit_ancillary_info ();
}
exit (status);
}
/* 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 0 if successful, -1 if an error occurs. */
+ The checksum varies depending on sizeof (int).
+ Return true if successful. */
-static int
+static bool
bsd_sum_file (const char *file, int print_name)
{
- register FILE *fp;
- register int checksum = 0; /* The checksum mod 2^16. */
- register uintmax_t total_bytes = 0; /* The number of bytes. */
- register int ch; /* Each character read. */
+ FILE *fp;
+ int checksum = 0; /* The checksum mod 2^16. */
+ uintmax_t total_bytes = 0; /* The number of bytes. */
+ int ch; /* Each character read. */
char hbuf[LONGEST_HUMAN_READABLE + 1];
+ bool is_stdin = STREQ (file, "-");
- if (STREQ (file, "-"))
+ if (is_stdin)
{
fp = stdin;
- have_read_stdin = 1;
+ have_read_stdin = true;
+ if (O_BINARY && ! isatty (STDIN_FILENO))
+ xfreopen (NULL, "rb", stdin);
}
else
{
- fp = fopen (file, "r");
+ fp = fopen (file, (O_BINARY ? "rb" : "r"));
if (fp == NULL)
- {
- error (0, errno, "%s", file);
- return -1;
- }
+ {
+ error (0, errno, "%s", file);
+ return false;
+ }
}
- /* Need binary I/O, or else byte counts and checksums are incorrect. */
- SET_BINARY (fileno(fp));
+
+ fadvise (fp, FADVISE_SEQUENTIAL);
while ((ch = getc (fp)) != EOF)
{
if (ferror (fp))
{
error (0, errno, "%s", file);
- if (!STREQ (file, "-"))
- fclose (fp);
- return -1;
+ if (!is_stdin)
+ fclose (fp);
+ return false;
}
- if (!STREQ (file, "-") && fclose (fp) == EOF)
+ if (!is_stdin && fclose (fp) != 0)
{
error (0, errno, "%s", file);
- return -1;
+ return false;
}
printf ("%05d %5s", checksum,
- human_readable (total_bytes, hbuf, human_ceiling, 1, 1024));
+ human_readable (total_bytes, hbuf, human_ceiling, 1, 1024));
if (print_name > 1)
printf (" %s", file);
putchar ('\n');
- return 0;
+ return true;
}
/* 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 0 if successful, -1 if an error occurs. */
+ Return true if successful. */
-static int
+static bool
sysv_sum_file (const char *file, int print_name)
{
int fd;
/* The sum of all the input bytes, modulo (UINT_MAX + 1). */
unsigned int s = 0;
- if (STREQ (file, "-"))
+ bool is_stdin = STREQ (file, "-");
+
+ if (is_stdin)
{
- fd = 0;
- have_read_stdin = 1;
+ fd = STDIN_FILENO;
+ have_read_stdin = true;
+ if (O_BINARY && ! isatty (STDIN_FILENO))
+ xfreopen (NULL, "rb", stdin);
}
else
{
- fd = open (file, O_RDONLY);
+ fd = open (file, O_RDONLY | O_BINARY);
if (fd == -1)
- {
- error (0, errno, "%s", file);
- return -1;
- }
+ {
+ error (0, errno, "%s", file);
+ return false;
+ }
}
- /* Need binary I/O, or else byte counts and checksums are incorrect. */
- SET_BINARY (fd);
while (1)
{
size_t bytes_read = safe_read (fd, buf, sizeof buf);
if (bytes_read == 0)
- break;
+ break;
if (bytes_read == SAFE_READ_ERROR)
- {
- error (0, errno, "%s", file);
- if (!STREQ (file, "-"))
- close (fd);
- return -1;
- }
+ {
+ error (0, errno, "%s", file);
+ if (!is_stdin)
+ close (fd);
+ return false;
+ }
for (i = 0; i < bytes_read; i++)
- s += buf[i];
+ s += buf[i];
total_bytes += bytes_read;
}
- if (!STREQ (file, "-") && close (fd) == -1)
+ if (!is_stdin && close (fd) != 0)
{
error (0, errno, "%s", file);
- return -1;
+ return false;
}
r = (s & 0xffff) + ((s & 0xffffffff) >> 16);
checksum = (r & 0xffff) + (r >> 16);
printf ("%d %s", checksum,
- human_readable (total_bytes, hbuf, human_ceiling, 1, 512));
+ human_readable (total_bytes, hbuf, human_ceiling, 1, 512));
if (print_name)
printf (" %s", file);
putchar ('\n');
- return 0;
+ return true;
}
int
main (int argc, char **argv)
{
- int errors = 0;
+ bool ok;
int optc;
int files_given;
- int (*sum_func) (const char *, int) = bsd_sum_file;
+ bool (*sum_func) (const char *, int) = bsd_sum_file;
initialize_main (&argc, &argv);
- program_name = argv[0];
+ set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
- have_read_stdin = 0;
+ /* Line buffer stdout to ensure lines are written atomically and immediately
+ so that processes running in parallel do not intersperse their output. */
+ setvbuf (stdout, NULL, _IOLBF, 0);
+
+ have_read_stdin = false;
while ((optc = getopt_long (argc, argv, "rs", longopts, NULL)) != -1)
{
switch (optc)
- {
- case 0:
- break;
+ {
+ case 'r': /* For SysV compatibility. */
+ sum_func = bsd_sum_file;
+ break;
- case 'r': /* For SysV compatibility. */
- sum_func = bsd_sum_file;
- break;
+ case 's':
+ sum_func = sysv_sum_file;
+ break;
- case 's':
- sum_func = sysv_sum_file;
- break;
+ case_GETOPT_HELP_CHAR;
- case_GETOPT_HELP_CHAR;
+ case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
- case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
-
- default:
- usage (EXIT_FAILURE);
- }
+ default:
+ usage (EXIT_FAILURE);
+ }
}
files_given = argc - optind;
- if (files_given == 0)
- {
- if ((*sum_func) ("-", files_given) < 0)
- errors = 1;
- }
+ if (files_given <= 0)
+ ok = sum_func ("-", files_given);
else
- for (; optind < argc; optind++)
- if ((*sum_func) (argv[optind], files_given) < 0)
- errors = 1;
+ for (ok = true; optind < argc; optind++)
+ ok &= sum_func (argv[optind], files_given);
if (have_read_stdin && fclose (stdin) == EOF)
error (EXIT_FAILURE, errno, "-");
- exit (errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+ exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
projects / platform / upstream / coreutils.git / blobdiff