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git.ipfire.org Git - ipfire-2.x.git/blob - src/misc-progs/setuid.h
1 /* SmoothWall helper program - header file
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.
13 #include <sys/types.h>
15 /* As nothing in setuid.c uses STRING_SIZE specifically there's no real reason
16 * to redefine it if it already is set */
18 #define STRING_SIZE 256
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 ".-"
28 #define VALID_IP(ip) (strlen(ip) > 6 \
30 && strspn(ip, NUMBERS ".") == strlen(ip))
32 #define VALID_IP_AND_MASK(ip) (strlen(ip) > 6 \
34 && strspn(ip, IP_NUMBERS) == strlen(ip))
36 #define VALID_PORT(port) (strlen(port) \
38 && strspn(port, NUMBERS) == strlen(port))
40 #define VALID_PORT_RANGE(port) (strlen(port) \
41 && strlen(port) < 12 \
42 && strspn(port, PORT_NUMBERS) == strlen(port))
44 #define VALID_SHORT_MASK(ip) (strlen(ip) > 1 \
46 && strspn(ip, NUMBERS) == strlen(ip))
48 /* Can't find any info on valid characters/length hopefully these are
49 * reasonable guesses */
50 #define VALID_DEVICE(dev) (strlen(dev) \
52 && strspn(dev, LETTERS_NUMBERS ":.") == strlen(dev))
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) \
60 && strspn(prot, LETTERS_NUMBERS "-") == strlen(prot))
62 extern char * trusted_env
[4];
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
);
70 /* check whether a file exists */
71 int file_exists(const char *fname
);
72 int file_exists_w(const char *fname
); //wildcard filename test