1 /* sum -- checksum and count the blocks in a file
2 Copyright (C) 86, 89, 91, 1995-2001 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 Foundation,
16 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>
31 #include "safe-read.h"
33 /* The official name of this program (e.g., no `g' prefix). */
34 #define PROGRAM_NAME "sum"
36 #define AUTHORS N_ ("Kayvan Aghaiepour and David MacKenzie")
38 /* The name this program was run with. */
41 /* Nonzero if any of the files read were the standard input. */
42 static int have_read_stdin;
44 static struct option const longopts[] =
46 {"sysv", no_argument, NULL, 's'},
47 {GETOPT_HELP_OPTION_DECL},
48 {GETOPT_VERSION_OPTION_DECL},
56 fprintf (stderr, _("Try `%s --help' for more information.\n"),
61 Usage: %s [OPTION]... [FILE]...\n\
65 Print checksum and block counts for each FILE.\n\
67 -r defeat -s, use BSD sum algorithm, use 1K blocks\n\
68 -s, --sysv use System V sum algorithm, use 512 bytes blocks\n\
69 --help display this help and exit\n\
70 --version output version information and exit\n\
72 With no FILE, or when FILE is -, read standard input.\n\
74 puts (_("\nReport bugs to <bug-textutils@gnu.org>."));
76 exit (status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
79 /* Calculate and print the rotated checksum and the size in 1K blocks
80 of file FILE, or of the standard input if FILE is "-".
81 If PRINT_NAME is >1, print FILE next to the checksum and size.
82 The checksum varies depending on sizeof(int).
83 Return 0 if successful, -1 if an error occurs. */
86 bsd_sum_file (const char *file, int print_name)
89 register int checksum = 0; /* The checksum mod 2^16. */
90 register uintmax_t total_bytes = 0; /* The number of bytes. */
91 register int ch; /* Each character read. */
92 char hbuf[LONGEST_HUMAN_READABLE + 1];
94 if (STREQ (file, "-"))
101 fp = fopen (file, "r");
104 error (0, errno, "%s", file);
108 /* Need binary I/O, or else byte counts and checksums are incorrect. */
109 SET_BINARY (fileno(fp));
111 while ((ch = getc (fp)) != EOF)
114 checksum = (checksum >> 1) + ((checksum & 1) << 15);
116 checksum &= 0xffff; /* Keep it within bounds. */
121 error (0, errno, "%s", file);
122 if (!STREQ (file, "-"))
127 if (!STREQ (file, "-") && fclose (fp) == EOF)
129 error (0, errno, "%s", file);
133 printf ("%05d %5s", checksum,
134 human_readable_inexact (total_bytes, hbuf, 1, 1024, human_ceiling));
136 printf (" %s", file);
142 /* Calculate and print the checksum and the size in 512-byte blocks
143 of file FILE, or of the standard input if FILE is "-".
144 If PRINT_NAME is >0, print FILE next to the checksum and size.
145 Return 0 if successful, -1 if an error occurs. */
148 sysv_sum_file (const char *file, int print_name)
151 unsigned char buf[8192];
152 register int bytes_read;
153 uintmax_t total_bytes = 0;
154 char hbuf[LONGEST_HUMAN_READABLE + 1];
158 /* The sum of all the input bytes, modulo (UINT_MAX + 1). */
159 register unsigned int s = 0;
161 if (STREQ (file, "-"))
168 fd = open (file, O_RDONLY);
171 error (0, errno, "%s", file);
175 /* Need binary I/O, or else byte counts and checksums are incorrect. */
178 while ((bytes_read = safe_read (fd, buf, sizeof buf)) > 0)
182 for (i = 0; i < bytes_read; i++)
184 total_bytes += bytes_read;
189 error (0, errno, "%s", file);
190 if (!STREQ (file, "-"))
195 if (!STREQ (file, "-") && close (fd) == -1)
197 error (0, errno, "%s", file);
201 r = (s & 0xffff) + ((s & 0xffffffff) >> 16);
202 checksum = (r & 0xffff) + (r >> 16);
204 printf ("%d %s", checksum,
205 human_readable_inexact (total_bytes, hbuf, 1, 512, human_ceiling));
207 printf (" %s", file);
214 main (int argc, char **argv)
219 int (*sum_func) PARAMS ((const char *, int)) = bsd_sum_file;
221 program_name = argv[0];
222 setlocale (LC_ALL, "");
223 bindtextdomain (PACKAGE, LOCALEDIR);
224 textdomain (PACKAGE);
226 atexit (close_stdout);
230 while ((optc = getopt_long (argc, argv, "rs", longopts, NULL)) != -1)
237 case 'r': /* For SysV compatibility. */
238 sum_func = bsd_sum_file;
242 sum_func = sysv_sum_file;
245 case_GETOPT_HELP_CHAR;
247 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
254 files_given = argc - optind;
255 if (files_given == 0)
257 if ((*sum_func) ("-", files_given) < 0)
261 for (; optind < argc; optind++)
262 if ((*sum_func) (argv[optind], files_given) < 0)
265 if (have_read_stdin && fclose (stdin) == EOF)
266 error (EXIT_FAILURE, errno, "-");
267 exit (errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);