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70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#include <stdio.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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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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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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char buf[300];
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/* Like `read' but keeps trying until it gets SIZE bytes or reaches eof. */
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int
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cool_read (fd, buf, size)
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int fd;
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char *buf;
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int size;
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{
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int num, 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 (argc, argv)
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int argc;
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char **argv;
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{
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int fd;
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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 (2);
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}
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fd = open (argv[1], 0);
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if (fd < 0)
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{
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perror (argv[1]);
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exit (2);
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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 (2);
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}
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close (fd);
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#ifdef VMS
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exit (1); /* On VMS, success is 1. */
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#endif
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return (0);
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}
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