projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8ea4199d DF |
1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 2ce81398 DS |
7 | #if defined(LIBC_SCCS) && !defined(lint) |
| 8 | static char sccsid[] = "@(#)getservent.c 5.2 (Berkeley) %G%"; | |
| 9 | #endif LIBC_SCCS and not lint | |
| 229225cd SL |
10 | |
| 11 | #include <stdio.h> | |
| 62fc8b9c | 12 | #include <sys/types.h> |
| 229225cd SL |
13 | #include <sys/socket.h> |
| 14 | #include <netdb.h> | |
| 15 | #include <ctype.h> | |
| 16 | ||
| 17 | #define MAXALIASES 35 | |
| 18 | ||
| 62fc8b9c | 19 | static char SERVDB[] = "/etc/services"; |
| 229225cd SL |
20 | static FILE *servf = NULL; |
| 21 | static char line[BUFSIZ+1]; | |
| 22 | static struct servent serv; | |
| 23 | static char *serv_aliases[MAXALIASES]; | |
| 24 | static int stayopen = 0; | |
| 229225cd SL |
25 | static char *any(); |
| 26 | ||
| 27 | setservent(f) | |
| 28 | int f; | |
| 29 | { | |
| 30 | if (servf == NULL) | |
| 31 | servf = fopen(SERVDB, "r" ); | |
| 32 | else | |
| 33 | rewind(servf); | |
| 34 | stayopen |= f; | |
| 35 | } | |
| 36 | ||
| 37 | endservent() | |
| 38 | { | |
| 39 | if (servf && !stayopen) { | |
| 40 | fclose(servf); | |
| 41 | servf = NULL; | |
| 42 | } | |
| 43 | } | |
| 44 | ||
| 45 | struct servent * | |
| 46 | getservent() | |
| 47 | { | |
| 48 | char *p; | |
| 49 | register char *cp, **q; | |
| 50 | ||
| 51 | if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL) | |
| 52 | return (NULL); | |
| 53 | again: | |
| 54 | if ((p = fgets(line, BUFSIZ, servf)) == NULL) | |
| 55 | return (NULL); | |
| 56 | if (*p == '#') | |
| 57 | goto again; | |
| 58 | cp = any(p, "#\n"); | |
| 59 | if (cp == NULL) | |
| 60 | goto again; | |
| 61 | *cp = '\0'; | |
| 62 | serv.s_name = p; | |
| 63 | p = any(p, " \t"); | |
| 64 | if (p == NULL) | |
| 65 | goto again; | |
| 66 | *p++ = '\0'; | |
| 67 | while (*p == ' ' || *p == '\t') | |
| 68 | p++; | |
| 69 | cp = any(p, ",/"); | |
| 70 | if (cp == NULL) | |
| 71 | goto again; | |
| 72 | *cp++ = '\0'; | |
| 62fc8b9c | 73 | serv.s_port = htons((u_short)atoi(p)); |
| 229225cd | 74 | serv.s_proto = cp; |
| 9243aabf | 75 | q = serv.s_aliases = serv_aliases; |
| 229225cd | 76 | cp = any(cp, " \t"); |
| 463dee20 | 77 | if (cp != NULL) |
| 229225cd | 78 | *cp++ = '\0'; |
| 463dee20 SL |
79 | while (cp && *cp) { |
| 80 | if (*cp == ' ' || *cp == '\t') { | |
| 81 | cp++; | |
| 82 | continue; | |
| 229225cd | 83 | } |
| 463dee20 SL |
84 | if (q < &serv_aliases[MAXALIASES - 1]) |
| 85 | *q++ = cp; | |
| 86 | cp = any(cp, " \t"); | |
| 87 | if (cp != NULL) | |
| 88 | *cp++ = '\0'; | |
| 229225cd SL |
89 | } |
| 90 | *q = NULL; | |
| 91 | return (&serv); | |
| 92 | } | |
| 93 | ||
| 94 | static char * | |
| 95 | any(cp, match) | |
| 96 | register char *cp; | |
| 97 | char *match; | |
| 98 | { | |
| 99 | register char *mp, c; | |
| 100 | ||
| 101 | while (c = *cp) { | |
| 102 | for (mp = match; *mp; mp++) | |
| 103 | if (*mp == c) | |
| 104 | return (cp); | |
| 105 | cp++; | |
| 106 | } | |
| 107 | return ((char *)0); | |
| 108 | } |