1 /* sum -- checksum and count the blocks in a file
2 Copyright (C) 86, 89, 91, 1995-1999 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Like BSD sum or SysV sum -r, except like SysV sum if -s option is given. */
20 /* Written by Kayvan Aghaiepour and David MacKenzie. */
25 #include <sys/types.h>
29 #include "long-options.h"
30 #include "safe-read.h"
32 /* The official name of this program (e.g., no `g' prefix). */
33 #define PROGRAM_NAME "sum"
35 /* The name this program was run with. */
38 /* Nonzero if any of the files read were the standard input. */
39 static int have_read_stdin;
41 /* Right-rotate 32-bit integer variable C. */
42 #define ROTATE_RIGHT(c) if ((c) & 01) (c) = ((c) >>1) + 0x8000; else (c) >>= 1;
44 static struct option const longopts[] =
46 {"sysv", no_argument, NULL, 's'},
54 fprintf (stderr, _("Try `%s --help' for more information.\n"),
59 Usage: %s [OPTION]... [FILE]...\n\
63 Print checksum and block counts for each FILE.\n\
65 -r defeat -s, use BSD sum algorithm, use 1K blocks\n\
66 -s, --sysv use System V sum algorithm, use 512 bytes blocks\n\
67 --help display this help and exit\n\
68 --version output version information and exit\n\
70 With no FILE, or when FILE is -, read standard input.\n\
72 puts (_("\nReport bugs to <bug-textutils@gnu.org>."));
74 exit (status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
77 /* Calculate and print the rotated checksum and the size in 1K blocks
78 of file FILE, or of the standard input if FILE is "-".
79 If PRINT_NAME is >1, print FILE next to the checksum and size.
80 The checksum varies depending on sizeof(int).
81 Return 0 if successful, -1 if an error occurs. */
84 bsd_sum_file (const char *file, int print_name)
87 register unsigned long checksum = 0; /* The checksum mod 2^16. */
88 register long total_bytes = 0; /* The number of bytes. */
89 register int ch; /* Each character read. */
91 if (STREQ (file, "-"))
98 fp = fopen (file, "r");
101 error (0, errno, "%s", file);
105 /* Need binary I/O, or else byte counts and checksums are incorrect. */
106 SET_BINARY (fileno(fp));
108 while ((ch = getc (fp)) != EOF)
111 ROTATE_RIGHT (checksum);
113 checksum &= 0xffff; /* Keep it within bounds. */
118 error (0, errno, "%s", file);
119 if (!STREQ (file, "-"))
124 if (!STREQ (file, "-") && fclose (fp) == EOF)
126 error (0, errno, "%s", file);
130 printf ("%05lu %5ld", checksum, (total_bytes + 1024 - 1) / 1024);
132 printf (" %s", file);
138 /* Calculate and print the checksum and the size in 512-byte blocks
139 of file FILE, or of the standard input if FILE is "-".
140 If PRINT_NAME is >0, print FILE next to the checksum and size.
141 Return 0 if successful, -1 if an error occurs. */
144 sysv_sum_file (const char *file, int print_name)
147 unsigned char buf[8192];
148 register int bytes_read;
149 register unsigned long checksum = 0;
150 long total_bytes = 0;
152 if (STREQ (file, "-"))
159 fd = open (file, O_RDONLY);
162 error (0, errno, "%s", file);
166 /* Need binary I/O, or else byte counts and checksums are incorrect. */
169 while ((bytes_read = safe_read (fd, buf, sizeof buf)) > 0)
173 for (i = 0; i < bytes_read; i++)
175 total_bytes += bytes_read;
180 error (0, errno, "%s", file);
181 if (!STREQ (file, "-"))
186 if (!STREQ (file, "-") && close (fd) == -1)
188 error (0, errno, "%s", file);
192 printf ("%lu %ld", checksum % 0xffff, (total_bytes + 512 - 1) / 512);
194 printf (" %s", file);
201 main (int argc, char **argv)
206 int (*sum_func) () = bsd_sum_file;
208 program_name = argv[0];
209 setlocale (LC_ALL, "");
210 bindtextdomain (PACKAGE, LOCALEDIR);
211 textdomain (PACKAGE);
215 parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
216 "Kayvan Aghaiepour and David MacKenzie", usage);
218 while ((optc = getopt_long (argc, argv, "rs", longopts, NULL)) != -1)
225 case 'r': /* For SysV compatibility. */
226 sum_func = bsd_sum_file;
230 sum_func = sysv_sum_file;
238 files_given = argc - optind;
239 if (files_given == 0)
241 if ((*sum_func) ("-", files_given) < 0)
245 for (; optind < argc; optind++)
246 if ((*sum_func) (argv[optind], files_given) < 0)
249 if (have_read_stdin && fclose (stdin) == EOF)
250 error (EXIT_FAILURE, errno, "-");
251 exit (errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);