projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 463dee20 | 1 | /* getservent.c 4.5 83/01/02 */ |
| 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"); |
| 463dee20 | 69 | if (cp != NULL) |
| 229225cd | 70 | *cp++ = '\0'; |
| 463dee20 SL |
71 | while (cp && *cp) { |
| 72 | if (*cp == ' ' || *cp == '\t') { | |
| 73 | cp++; | |
| 74 | continue; | |
| 229225cd | 75 | } |
| 463dee20 SL |
76 | if (q < &serv_aliases[MAXALIASES - 1]) |
| 77 | *q++ = cp; | |
| 78 | cp = any(cp, " \t"); | |
| 79 | if (cp != NULL) | |
| 80 | *cp++ = '\0'; | |
| 229225cd SL |
81 | } |
| 82 | *q = NULL; | |
| 83 | return (&serv); | |
| 84 | } | |
| 85 | ||
| 86 | static char * | |
| 87 | any(cp, match) | |
| 88 | register char *cp; | |
| 89 | char *match; | |
| 90 | { | |
| 91 | register char *mp, c; | |
| 92 | ||
| 93 | while (c = *cp) { | |
| 94 | for (mp = match; *mp; mp++) | |
| 95 | if (*mp == c) | |
| 96 | return (cp); | |
| 97 | cp++; | |
| 98 | } | |
| 99 | return ((char *)0); | |
| 100 | } |