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b3ae7a0a GM |
1 | /* test-distrib.c --- testing distribution of nonprinting chars |
2 | ||
acaf905b | 3 | Copyright (C) 1987, 1993-1995, 1999, 2001-2012 Free Software Foundation, Inc. |
b3ae7a0a | 4 | |
294981c7 | 5 | This file is part of GNU Emacs. |
b3ae7a0a | 6 | |
294981c7 GM |
7 | GNU Emacs is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
b3ae7a0a | 11 | |
294981c7 GM |
12 | GNU Emacs is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ | |
b3ae7a0a | 19 | |
b3ae7a0a | 20 | |
33b78bd6 | 21 | #include <config.h> |
042c85b8 | 22 | #include <stdio.h> |
f0e8db05 | 23 | #include <fcntl.h> |
9ee8cf9e | 24 | #include <unistd.h> |
9ee8cf9e | 25 | |
042c85b8 JB |
26 | /* Break string in two parts to avoid buggy C compilers that ignore characters |
27 | after nulls in strings. */ | |
28 | ||
b23b5a5b | 29 | static char string1[] = "Testing distribution of nonprinting chars:\n\ |
042c85b8 JB |
30 | Should be 0177: \177 Should be 0377: \377 Should be 0212: \212.\n\ |
31 | Should be 0000: "; | |
32 | ||
b23b5a5b | 33 | static char string2[] = ".\n\ |
042c85b8 JB |
34 | This file is read by the `test-distribution' program.\n\ |
35 | If you change it, you will make that program fail.\n"; | |
36 | ||
042c85b8 | 37 | /* Like `read' but keeps trying until it gets SIZE bytes or reaches eof. */ |
b23b5a5b | 38 | static int |
728a982d | 39 | cool_read (int fd, char *buf, size_t size) |
042c85b8 | 40 | { |
728a982d | 41 | ssize_t num; |
f16cafe3 | 42 | ssize_t sofar = 0; |
042c85b8 JB |
43 | |
44 | while (1) | |
45 | { | |
46 | if ((num = read (fd, buf + sofar, size - sofar)) == 0) | |
47 | return sofar; | |
48 | else if (num < 0) | |
49 | return num; | |
50 | sofar += num; | |
51 | } | |
52 | } | |
53 | ||
340ff9de | 54 | int |
b8463cbf | 55 | main (int argc, char **argv) |
042c85b8 | 56 | { |
d2d92f7a | 57 | int fd; |
08c69097 | 58 | char buf[300]; |
042c85b8 | 59 | |
d2d92f7a JB |
60 | if (argc != 2) |
61 | { | |
62 | fprintf (stderr, "Usage: %s testfile\n", argv[0]); | |
80e26b66 | 63 | exit (EXIT_FAILURE); |
d2d92f7a | 64 | } |
33b78bd6 | 65 | fd = open (argv[1], O_RDONLY); |
042c85b8 JB |
66 | if (fd < 0) |
67 | { | |
d2d92f7a | 68 | perror (argv[1]); |
80e26b66 | 69 | exit (EXIT_FAILURE); |
042c85b8 JB |
70 | } |
71 | if (cool_read (fd, buf, sizeof string1) != sizeof string1 || | |
72 | strcmp (buf, string1) || | |
73 | cool_read (fd, buf, sizeof string2) != sizeof string2 - 1 || | |
74 | strncmp (buf, string2, sizeof string2 - 1)) | |
75 | { | |
d2d92f7a | 76 | fprintf (stderr, "Data in file `%s' has been damaged.\n\ |
042c85b8 | 77 | Most likely this means that many nonprinting characters\n\ |
d2d92f7a JB |
78 | have been corrupted in the files of Emacs, and it will not work.\n", |
79 | argv[1]); | |
80e26b66 | 80 | exit (EXIT_FAILURE); |
042c85b8 JB |
81 | } |
82 | close (fd); | |
65396510 | 83 | return EXIT_SUCCESS; |
042c85b8 | 84 | } |
ab5796a9 | 85 | |
65396510 TTN |
86 | |
87 | /* test-distrib.c ends here */ |