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[people/teissler/ipfire-2.x.git] / src / misc-progs / setuid.h
1 /* SmoothWall helper program - header file
2 *
3 * This program is distributed under the terms of the GNU General Public
4 * Licence. See the file COPYING for details.
5 * Simple header file for all setuid progs.
6 *
7 */
8
9 #ifndef SETUID_H
10 #define SETUID_H 1
11
12 #include <stdlib.h>
13 #include <sys/types.h>
14
15 /* As nothing in setuid.c uses STRING_SIZE specifically there's no real reason
16 * to redefine it if it already is set */
17 #ifndef STRING_SIZE
18 #define STRING_SIZE 256
19 #endif
20 #define LETTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
21 #define NUMBERS "0123456789"
22 #define LETTERS_NUMBERS LETTERS NUMBERS
23 #define IP_NUMBERS "./" NUMBERS
24 #define PORT_NUMBERS ":-" NUMBERS
25 #define VALID_FQDN LETTERS_NUMBERS ".-"
26
27
28 #define VALID_IP(ip) (strlen(ip) > 6 \
29 && strlen(ip) < 16 \
30 && strspn(ip, NUMBERS ".") == strlen(ip))
31
32 #define VALID_IP_AND_MASK(ip) (strlen(ip) > 6 \
33 && strlen(ip) < 32 \
34 && strspn(ip, IP_NUMBERS) == strlen(ip))
35
36 #define VALID_PORT(port) (strlen(port) \
37 && strlen(port) < 6 \
38 && strspn(port, NUMBERS) == strlen(port))
39
40 #define VALID_PORT_RANGE(port) (strlen(port) \
41 && strlen(port) < 12 \
42 && strspn(port, PORT_NUMBERS) == strlen(port))
43
44 #define VALID_SHORT_MASK(ip) (strlen(ip) > 1 \
45 && strlen(ip) < 3 \
46 && strspn(ip, NUMBERS) == strlen(ip))
47
48 /* Can't find any info on valid characters/length hopefully these are
49 * reasonable guesses */
50 #define VALID_DEVICE(dev) (strlen(dev) \
51 && strlen(dev) < 16 \
52 && strspn(dev, LETTERS_NUMBERS ":.") == strlen(dev))
53
54 /* Again, can't find any hard and fast rules for protocol names, these
55 * restrictions are based on the keywords currently listed in
56 * <http://www.iana.org/assignments/protocol-numbers>
57 * though currently the ipcop cgis will only pass tcp, udp or gre anyway */
58 #define VALID_PROTOCOL(prot) (strlen(prot) \
59 && strlen(prot) <16 \
60 && strspn(prot, LETTERS_NUMBERS "-") == strlen(prot))
61
62 extern char * trusted_env[4];
63
64 int system_core(char* command, uid_t uid, gid_t gid, char *error);
65 int safe_system(char* command);
66 int unpriv_system(char* command, uid_t uid, gid_t gid);
67 size_t strlcat(char *dst, const char *src, size_t len);
68 int initsetuid(void);
69
70 /* check whether a file exists */
71 int file_exists(const char *fname);
72 int file_exists_w(const char *fname); //wildcard filename test
73
74 #endif