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89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* test-distrib.c --- testing distribution of nonprinting chars
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Copyright (C) 1987, 1993-1995, 1999, 2001-2014 Free Software Foundation,
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Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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/* Break string in two parts to avoid buggy C compilers that ignore characters
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after nulls in strings. */
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static char string1[] = "Testing distribution of nonprinting chars:\n\
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Should be 0177: \177 Should be 0377: \377 Should be 0212: \212.\n\
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Should be 0000: ";
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static char string2[] = ".\n\
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This file is read by the `test-distribution' program.\n\
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If you change it, you will make that program fail.\n";
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/* Like `read' but keeps trying until it gets SIZE bytes or reaches eof. */
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static int
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cool_read (int fd, char *buf, size_t size)
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{
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ssize_t num;
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ssize_t sofar = 0;
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while (1)
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{
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if ((num = read (fd, buf + sofar, size - sofar)) == 0)
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return sofar;
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else if (num < 0)
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return num;
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sofar += num;
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}
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}
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int
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main (int argc, char **argv)
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{
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int fd;
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char buf[300];
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if (argc != 2)
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{
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fprintf (stderr, "Usage: %s testfile\n", argv[0]);
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exit (EXIT_FAILURE);
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}
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fd = open (argv[1], O_RDONLY);
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if (fd < 0)
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{
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perror (argv[1]);
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exit (EXIT_FAILURE);
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}
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if (cool_read (fd, buf, sizeof string1) != sizeof string1 ||
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strcmp (buf, string1) ||
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cool_read (fd, buf, sizeof string2) != sizeof string2 - 1 ||
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strncmp (buf, string2, sizeof string2 - 1))
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{
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fprintf (stderr, "Data in file `%s' has been damaged.\n\
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Most likely this means that many nonprinting characters\n\
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have been corrupted in the files of Emacs, and it will not work.\n",
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argv[1]);
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exit (EXIT_FAILURE);
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}
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close (fd);
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return EXIT_SUCCESS;
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}
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/* test-distrib.c ends here */
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