Commit | Line | Data |
---|---|---|
62fc8b9c | 1 | /* getservent.c 4.4 82/12/17 */ |
229225cd SL |
2 | |
3 | #include <stdio.h> | |
62fc8b9c | 4 | #include <sys/types.h> |
229225cd SL |
5 | #include <sys/socket.h> |
6 | #include <netdb.h> | |
7 | #include <ctype.h> | |
8 | ||
9 | #define MAXALIASES 35 | |
10 | ||
62fc8b9c | 11 | static char SERVDB[] = "/etc/services"; |
229225cd SL |
12 | static FILE *servf = NULL; |
13 | static char line[BUFSIZ+1]; | |
14 | static struct servent serv; | |
15 | static char *serv_aliases[MAXALIASES]; | |
16 | static int stayopen = 0; | |
229225cd SL |
17 | static char *any(); |
18 | ||
19 | setservent(f) | |
20 | int f; | |
21 | { | |
22 | if (servf == NULL) | |
23 | servf = fopen(SERVDB, "r" ); | |
24 | else | |
25 | rewind(servf); | |
26 | stayopen |= f; | |
27 | } | |
28 | ||
29 | endservent() | |
30 | { | |
31 | if (servf && !stayopen) { | |
32 | fclose(servf); | |
33 | servf = NULL; | |
34 | } | |
35 | } | |
36 | ||
37 | struct servent * | |
38 | getservent() | |
39 | { | |
40 | char *p; | |
41 | register char *cp, **q; | |
42 | ||
43 | if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL) | |
44 | return (NULL); | |
45 | again: | |
46 | if ((p = fgets(line, BUFSIZ, servf)) == NULL) | |
47 | return (NULL); | |
48 | if (*p == '#') | |
49 | goto again; | |
50 | cp = any(p, "#\n"); | |
51 | if (cp == NULL) | |
52 | goto again; | |
53 | *cp = '\0'; | |
54 | serv.s_name = p; | |
55 | p = any(p, " \t"); | |
56 | if (p == NULL) | |
57 | goto again; | |
58 | *p++ = '\0'; | |
59 | while (*p == ' ' || *p == '\t') | |
60 | p++; | |
61 | cp = any(p, ",/"); | |
62 | if (cp == NULL) | |
63 | goto again; | |
64 | *cp++ = '\0'; | |
62fc8b9c | 65 | serv.s_port = htons((u_short)atoi(p)); |
229225cd | 66 | serv.s_proto = cp; |
9243aabf | 67 | q = serv.s_aliases = serv_aliases; |
229225cd | 68 | cp = any(cp, " \t"); |
9243aabf | 69 | if (cp != NULL) { |
229225cd | 70 | *cp++ = '\0'; |
9243aabf SL |
71 | while (*cp) { |
72 | if (*cp == ' ' || *cp == '\t') { | |
73 | cp++; | |
74 | continue; | |
75 | } | |
76 | if (q < &serv_aliases[MAXALIASES - 1]) | |
77 | *q++ = cp; | |
78 | cp = any(cp, " \t"); | |
79 | if (*cp != NULL) | |
80 | *cp++ = '\0'; | |
229225cd | 81 | } |
229225cd SL |
82 | } |
83 | *q = NULL; | |
84 | return (&serv); | |
85 | } | |
86 | ||
87 | static char * | |
88 | any(cp, match) | |
89 | register char *cp; | |
90 | char *match; | |
91 | { | |
92 | register char *mp, c; | |
93 | ||
94 | while (c = *cp) { | |
95 | for (mp = match; *mp; mp++) | |
96 | if (*mp == c) | |
97 | return (cp); | |
98 | cp++; | |
99 | } | |
100 | return ((char *)0); | |
101 | } |