Commit | Line | Data |
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b3ae7a0a GM |
1 | /* test-distrib.c --- testing distribution of nonprinting chars |
2 | ||
ab422c4d PE |
3 | Copyright (C) 1987, 1993-1995, 1999, 2001-2013 Free Software Foundation, |
4 | Inc. | |
b3ae7a0a | 5 | |
294981c7 | 6 | This file is part of GNU Emacs. |
b3ae7a0a | 7 | |
294981c7 GM |
8 | GNU Emacs is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
11 | (at your option) any later version. | |
b3ae7a0a | 12 | |
294981c7 GM |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ | |
b3ae7a0a | 20 | |
b3ae7a0a | 21 | |
33b78bd6 | 22 | #include <config.h> |
042c85b8 | 23 | #include <stdio.h> |
f0e8db05 | 24 | #include <fcntl.h> |
9ee8cf9e | 25 | #include <unistd.h> |
9ee8cf9e | 26 | |
042c85b8 JB |
27 | /* Break string in two parts to avoid buggy C compilers that ignore characters |
28 | after nulls in strings. */ | |
29 | ||
b23b5a5b | 30 | static char string1[] = "Testing distribution of nonprinting chars:\n\ |
042c85b8 JB |
31 | Should be 0177: \177 Should be 0377: \377 Should be 0212: \212.\n\ |
32 | Should be 0000: "; | |
33 | ||
b23b5a5b | 34 | static char string2[] = ".\n\ |
042c85b8 JB |
35 | This file is read by the `test-distribution' program.\n\ |
36 | If you change it, you will make that program fail.\n"; | |
37 | ||
042c85b8 | 38 | /* Like `read' but keeps trying until it gets SIZE bytes or reaches eof. */ |
b23b5a5b | 39 | static int |
728a982d | 40 | cool_read (int fd, char *buf, size_t size) |
042c85b8 | 41 | { |
728a982d | 42 | ssize_t num; |
f16cafe3 | 43 | ssize_t sofar = 0; |
042c85b8 JB |
44 | |
45 | while (1) | |
46 | { | |
47 | if ((num = read (fd, buf + sofar, size - sofar)) == 0) | |
48 | return sofar; | |
49 | else if (num < 0) | |
50 | return num; | |
51 | sofar += num; | |
52 | } | |
53 | } | |
54 | ||
340ff9de | 55 | int |
b8463cbf | 56 | main (int argc, char **argv) |
042c85b8 | 57 | { |
d2d92f7a | 58 | int fd; |
08c69097 | 59 | char buf[300]; |
042c85b8 | 60 | |
d2d92f7a JB |
61 | if (argc != 2) |
62 | { | |
63 | fprintf (stderr, "Usage: %s testfile\n", argv[0]); | |
80e26b66 | 64 | exit (EXIT_FAILURE); |
d2d92f7a | 65 | } |
33b78bd6 | 66 | fd = open (argv[1], O_RDONLY); |
042c85b8 JB |
67 | if (fd < 0) |
68 | { | |
d2d92f7a | 69 | perror (argv[1]); |
80e26b66 | 70 | exit (EXIT_FAILURE); |
042c85b8 JB |
71 | } |
72 | if (cool_read (fd, buf, sizeof string1) != sizeof string1 || | |
73 | strcmp (buf, string1) || | |
74 | cool_read (fd, buf, sizeof string2) != sizeof string2 - 1 || | |
75 | strncmp (buf, string2, sizeof string2 - 1)) | |
76 | { | |
d2d92f7a | 77 | fprintf (stderr, "Data in file `%s' has been damaged.\n\ |
042c85b8 | 78 | Most likely this means that many nonprinting characters\n\ |
d2d92f7a JB |
79 | have been corrupted in the files of Emacs, and it will not work.\n", |
80 | argv[1]); | |
80e26b66 | 81 | exit (EXIT_FAILURE); |
042c85b8 JB |
82 | } |
83 | close (fd); | |
65396510 | 84 | return EXIT_SUCCESS; |
042c85b8 | 85 | } |
ab5796a9 | 86 | |
65396510 TTN |
87 | |
88 | /* test-distrib.c ends here */ |