xref: /illumos-gate/usr/src/cmd/getent/dogetserv.c (revision 142d813a06c6f9a6142e2c276b62129a17a31a65)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 
23 /*
24  * Copyright (c) 1994, by Sun Microsystems, Inc.
25  */
26 
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <string.h>
33 
34 #include <netdb.h>
35 #include "getent.h"
36 
37 static int
putservent(const struct servent * sp,FILE * fp)38 putservent(const struct servent *sp, FILE *fp)
39 {
40 	char **p;
41 	int rc = 0;
42 
43 	if (sp == NULL) {
44 		return (1);
45 	}
46 
47 	if (fprintf(fp, "%-20s %d/%s",
48 	    sp->s_name, ntohs(sp->s_port), sp->s_proto) == EOF)
49 		rc = 1;
50 	for (p = sp->s_aliases; *p != 0; p++) {
51 		if (fprintf(fp, " %s", *p) == EOF)
52 			rc = 1;
53 	}
54 	if (putc('\n', fp) == EOF)
55 		rc = 1;
56 	return (rc);
57 }
58 
59 /*
60  * getservbyname/addr - get entries from service database
61  * Accepts arguments as:
62  *	port/protocol
63  *	port
64  *	name/protocol
65  *	name
66  */
67 int
dogetserv(const char ** list)68 dogetserv(const char **list)
69 {
70 	struct servent *sp;
71 	int rc = EXC_SUCCESS;
72 
73 	if (list == NULL || *list == NULL) {
74 		while ((sp = getservent()) != NULL)
75 			(void) putservent(sp, stdout);
76 	} else {
77 		for (; *list != NULL; list++) {
78 			int port;
79 			char key[BUFSIZ];
80 			const char *protocol = NULL;
81 			char *cp;
82 
83 			/* Copy string to avoiding modifying the argument */
84 			(void) strncpy(key, *list, sizeof (key));
85 			key[sizeof (key) - 1] = '\0';
86 			/* Split at a '/' to extract protocol number */
87 			if ((cp = strchr(key, '/')) != NULL) {
88 				*cp = '\0';
89 				protocol = cp + 1;
90 			}
91 			port = htons(atoi(key));
92 			if (port != 0)
93 				sp = getservbyport(port, protocol);
94 			else
95 				sp = getservbyname(key, protocol);
96 			if (sp == NULL)
97 				rc = EXC_NAME_NOT_FOUND;
98 			else
99 				(void) putservent(sp, stdout);
100 		}
101 	}
102 
103 	return (rc);
104 }
105