Mercurial > projects > pwm

annotate compat/getline.c @ 33:fa93d2ff9c62

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Prevent potential division by zero Add safeguard ensuring that there is at least one possible character to generate passwords from in order to exclude the possibility of a division by zero error in rand_uniform.
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Tue, 30 Jul 2019 20:38:08 +0200
parents 5bdea77d0c1d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
26
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
1 /*
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
2 * Copyright (C) 2016 Guido Berhoerster <guido+pwm@berhoerster.name>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
3 *
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
4 * Permission is hereby granted, free of charge, to any person obtaining
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
5 * a copy of this software and associated documentation files (the
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
6 * "Software"), to deal in the Software without restriction, including
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
7 * without limitation the rights to use, copy, modify, merge, publish,
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
8 * distribute, sublicense, and/or sell copies of the Software, and to
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
9 * permit persons to whom the Software is furnished to do so, subject to
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
10 * the following conditions:
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
11 *
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
12 * The above copyright notice and this permission notice shall be included
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
13 * in all copies or substantial portions of the Software.
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
14 *
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
22 */
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
23
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
24 #include <stdio.h>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
25 #include <stdlib.h>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
26 #include <limits.h>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
27 #include <sys/types.h>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
28 #include <errno.h>
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
29
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
30 #include "getline.h"
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
31
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
32 #define MIN(x, y) (((x) < (y)) ? (x) : (y))
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
33
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
34 ssize_t
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
35 getdelim(char **linep, size_t *sizep, int delim, FILE *fp)
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
36 {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
37 ssize_t len;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
38 char *line = *linep;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
39 size_t size = *sizep;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
40 size_t pos = 0;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
41 char *line_new;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
42 int c;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
43
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
44 if (*linep == NULL) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
45 size = 0;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
46 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
47
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
48 flockfile(fp);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
49
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
50 for (;;) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
51 if (size - pos < 2) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
52 size = MIN((size_t)SSIZE_MAX + 1,
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
53 (size < BUFSIZ) ? BUFSIZ : size * 1.5);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
54 if (size - pos < 2) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
55 len = -1;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
56 errno = EOVERFLOW;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
57 break;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
58 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
59 line_new = realloc(line, size);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
60 if (line_new == NULL) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
61 len = -1;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
62 break;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
63 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
64 *linep = line = line_new;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
65 *sizep = size;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
66 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
67 c = fgetc(fp);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
68 if (c == EOF) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
69 len = -1;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
70 break;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
71 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
72 line[pos] = c;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
73 pos++;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
74 len = pos;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
75 if (c == delim) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
76 break;
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
77 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
78 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
79
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
80 if (*linep != NULL) {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
81 (*linep)[pos] = '\0';
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
82 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
83
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
84 funlockfile(fp);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
85
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
86 return (len);
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
87 }
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
88
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
89 ssize_t
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
90 getline(char **linep, size_t *sizep, FILE *fp)
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
91 {
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
92 return (getdelim(linep, sizep, '\n', fp));
5bdea77d0c1d Add pwm-clip utility for setting the X11 CLIPBOARD selection
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
93 }