1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)getservent.c 5.7 (Berkeley) 05/21/90"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <stdio.h> 23 #include <sys/param.h> 24 #include <sys/types.h> 25 #include <sys/socket.h> 26 #include <netdb.h> 27 #include <ctype.h> 28 29 #define MAXALIASES 35 30 31 static FILE *servf = NULL; 32 static char line[BUFSIZ+1]; 33 static struct servent serv; 34 static char *serv_aliases[MAXALIASES]; 35 static char *any(); 36 int _serv_stayopen; 37 38 setservent(f) 39 int f; 40 { 41 if (servf == NULL) 42 servf = fopen(_PATH_SERVICES, "r" ); 43 else 44 rewind(servf); 45 _serv_stayopen |= f; 46 } 47 48 endservent() 49 { 50 if (servf) { 51 fclose(servf); 52 servf = NULL; 53 } 54 _serv_stayopen = 0; 55 } 56 57 struct servent * 58 getservent() 59 { 60 char *p; 61 register char *cp, **q; 62 63 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 64 return (NULL); 65 again: 66 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 67 return (NULL); 68 if (*p == '#') 69 goto again; 70 cp = any(p, "#\n"); 71 if (cp == NULL) 72 goto again; 73 *cp = '\0'; 74 serv.s_name = p; 75 p = any(p, " \t"); 76 if (p == NULL) 77 goto again; 78 *p++ = '\0'; 79 while (*p == ' ' || *p == '\t') 80 p++; 81 cp = any(p, ",/"); 82 if (cp == NULL) 83 goto again; 84 *cp++ = '\0'; 85 serv.s_port = htons((u_short)atoi(p)); 86 serv.s_proto = cp; 87 q = serv.s_aliases = serv_aliases; 88 cp = any(cp, " \t"); 89 if (cp != NULL) 90 *cp++ = '\0'; 91 while (cp && *cp) { 92 if (*cp == ' ' || *cp == '\t') { 93 cp++; 94 continue; 95 } 96 if (q < &serv_aliases[MAXALIASES - 1]) 97 *q++ = cp; 98 cp = any(cp, " \t"); 99 if (cp != NULL) 100 *cp++ = '\0'; 101 } 102 *q = NULL; 103 return (&serv); 104 } 105 106 static char * 107 any(cp, match) 108 register char *cp; 109 char *match; 110 { 111 register char *mp, c; 112 113 while (c = *cp) { 114 for (mp = match; *mp; mp++) 115 if (*mp == c) 116 return (cp); 117 cp++; 118 } 119 return ((char *)0); 120 } 121