blob: 7464f43010a83f05e2210c6a891bee3c0236d8f0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* This file contains helper functions for labeling support.
*
* Author : Richard Haines <richard_c_haines@btinternet.com>
*/
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <string.h>
#include "label_internal.h"
/*
* The read_spec_entries and read_spec_entry functions may be used to
* replace sscanf to read entries from spec files. The file and
* property services now use these.
*/
/* Read an entry from a spec file (e.g. file_contexts) */
static inline int read_spec_entry(char **entry, char **ptr)
{
int entry_len = 0;
*entry = NULL;
char *tmp_buf = NULL;
while (isspace(**ptr) && **ptr != '\0')
(*ptr)++;
tmp_buf = *ptr;
while (!isspace(**ptr) && **ptr != '\0') {
(*ptr)++;
entry_len++;
}
*entry = strndup(tmp_buf, entry_len);
if (!*entry)
return -1;
return 0;
}
/*
* line_buf - Buffer containing the spec entries .
* num_args - The number of spec parameter entries to process.
* ... - A 'char **spec_entry' for each parameter.
* returns - The number of items processed.
*
* This function calls read_spec_entry() to do the actual string processing.
*/
int read_spec_entries(char *line_buf, int num_args, ...)
{
char **spec_entry, *buf_p;
int len, rc, items;
va_list ap;
len = strlen(line_buf);
if (line_buf[len - 1] == '\n')
line_buf[len - 1] = '\0';
buf_p = line_buf;
while (isspace(*buf_p))
buf_p++;
/* Skip comment lines and empty lines. */
if (*buf_p == '#' || *buf_p == '\0')
return 0;
/* Process the spec file entries */
va_start(ap, num_args);
for (items = 0; items < num_args; items++) {
spec_entry = va_arg(ap, char **);
if (len - 1 == buf_p - line_buf) {
va_end(ap);
return items;
}
rc = read_spec_entry(spec_entry, &buf_p);
if (rc < 0) {
va_end(ap);
return rc;
}
}
va_end(ap);
return items;
}
|
