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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission. This software
- * is provided ``as is'' without express or implied warranty.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)getservent.c 5.5 (Berkeley) 3/7/88";
- #endif /* LIBC_SCCS and not lint */
-
- #include <stdio.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netdb.h>
- #include <ctype.h>
- #include <netinet/in.h>
-
- #define MAXALIASES 35
-
- static char SERVDB[] = "/etc/services";
- static FILE *servf = NULL;
- static char line[BUFSIZ+1];
- static struct servent serv;
- static char *serv_aliases[MAXALIASES];
- static char *any();
- int _serv_stayopen;
-
- setservent(f)
- int f;
- {
- if (servf == NULL)
- servf = fopen(SERVDB, "r" );
- else
- rewind(servf);
- _serv_stayopen |= f;
- }
-
- endservent()
- {
- if (servf) {
- fclose(servf);
- servf = NULL;
- }
- _serv_stayopen = 0;
- }
-
- struct servent *
- getservent()
- {
- char *p;
- register char *cp, **q;
-
- if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
- return (NULL);
- again:
- if ((p = fgets(line, BUFSIZ, servf)) == NULL)
- return (NULL);
- if (*p == '#')
- goto again;
- cp = any(p, "#\n");
- if (cp == NULL)
- goto again;
- *cp = '\0';
- serv.s_name = p;
- p = any(p, " \t");
- if (p == NULL)
- goto again;
- *p++ = '\0';
- while (*p == ' ' || *p == '\t')
- p++;
- cp = any(p, ",/");
- if (cp == NULL)
- goto again;
- *cp++ = '\0';
- serv.s_port = htons((u_short)atoi(p));
- serv.s_proto = cp;
- q = serv.s_aliases = serv_aliases;
- cp = any(cp, " \t");
- if (cp != NULL)
- *cp++ = '\0';
- while (cp && *cp) {
- if (*cp == ' ' || *cp == '\t') {
- cp++;
- continue;
- }
- if (q < &serv_aliases[MAXALIASES - 1])
- *q++ = cp;
- cp = any(cp, " \t");
- if (cp != NULL)
- *cp++ = '\0';
- }
- *q = NULL;
- return (&serv);
- }
-
- static char *
- any(cp, match)
- register char *cp;
- char *match;
- {
- register char *mp, c;
-
- while (c = *cp) {
- for (mp = match; *mp; mp++)
- if (*mp == c)
- return (cp);
- cp++;
- }
- return ((char *)0);
- }
-