17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
22*4b908718Smeem
23*4b908718Smeem /*
24*4b908718Smeem * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
25*4b908718Smeem * Use is subject to license terms.
26*4b908718Smeem */
27*4b908718Smeem
287c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
297c478bd9Sstevel@tonic-gate /* All Rights Reserved */
307c478bd9Sstevel@tonic-gate
317c478bd9Sstevel@tonic-gate /*
327c478bd9Sstevel@tonic-gate * Streams Command strconf: display the configuration of the
337c478bd9Sstevel@tonic-gate * stream associated with stdin.
347c478bd9Sstevel@tonic-gate *
357c478bd9Sstevel@tonic-gate * USAGE: strconf
367c478bd9Sstevel@tonic-gate * or: strconf -m module
377c478bd9Sstevel@tonic-gate * or: strconf -t
387c478bd9Sstevel@tonic-gate *
397c478bd9Sstevel@tonic-gate * strconf with no options lists the modules on the stream.
407c478bd9Sstevel@tonic-gate * -m module echos "yes" and returns 0 if the module is on the stream.
417c478bd9Sstevel@tonic-gate * echos "no" and returns 2 if not.
427c478bd9Sstevel@tonic-gate * -t lists only the topmost module. returns 0 if there is a
437c478bd9Sstevel@tonic-gate * module, 2 if not.
447c478bd9Sstevel@tonic-gate *
457c478bd9Sstevel@tonic-gate * RETURNS:
467c478bd9Sstevel@tonic-gate * 0 SUCCESS it works
477c478bd9Sstevel@tonic-gate * 1 ERR_USAGE bad invocation
487c478bd9Sstevel@tonic-gate * 2 ERR_MODULE module not there
497c478bd9Sstevel@tonic-gate * 3 ERR_STDIN an ioctl on the stdin stream failed
507c478bd9Sstevel@tonic-gate * 4 ERR_MEM couldn't allocate memory
517c478bd9Sstevel@tonic-gate */
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate #include <stdio.h>
547c478bd9Sstevel@tonic-gate #include <sys/stropts.h>
55*4b908718Smeem #include <string.h>
56*4b908718Smeem #include <stdlib.h>
57*4b908718Smeem #include <unistd.h>
587c478bd9Sstevel@tonic-gate
597c478bd9Sstevel@tonic-gate #define OPTLIST "m:t"
607c478bd9Sstevel@tonic-gate #define USAGE "USAGE: %s [ -m module | -t ]\n"
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate #define SUCCESS 0
637c478bd9Sstevel@tonic-gate #define FAILURE 1
647c478bd9Sstevel@tonic-gate
657c478bd9Sstevel@tonic-gate #define ERR_USAGE 1 /* bad invocation */
667c478bd9Sstevel@tonic-gate #define ERR_MODULE 2 /* module not there */
677c478bd9Sstevel@tonic-gate #define ERR_STDIN 3 /* an ioctl on the stdin stream failed */
687c478bd9Sstevel@tonic-gate #define ERR_MEM 4 /* couldn't allocate memory */
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate #define NMODULES 16 /* "reasonable" # of modules on a stream */
717c478bd9Sstevel@tonic-gate /* (there can be more) */
727c478bd9Sstevel@tonic-gate #define MAXMODULES 2048 /* max # of modules */
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate static char *Cmd_namep; /* how was it invoked? */
75*4b908718Smeem static int more_modules(struct str_list *, int);
767c478bd9Sstevel@tonic-gate
77*4b908718Smeem int
main(int argc,char ** argv)78*4b908718Smeem main(int argc, char **argv)
797c478bd9Sstevel@tonic-gate {
807c478bd9Sstevel@tonic-gate char *modp; /* ptr to module name */
81*4b908718Smeem int i; /* loop var & junk (what else?) */
82*4b908718Smeem boolean_t mod_present; /* B_TRUE if -m module */
83*4b908718Smeem boolean_t topmost; /* B_TRUE if -t */
84*4b908718Smeem struct str_mlist mlist[NMODULES]; /* modlist for strlist */
857c478bd9Sstevel@tonic-gate struct str_list strlist; /* mods on stream */
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate /*
887c478bd9Sstevel@tonic-gate * init
897c478bd9Sstevel@tonic-gate */
907c478bd9Sstevel@tonic-gate Cmd_namep = argv[0];
91*4b908718Smeem mod_present = topmost = B_FALSE;
927c478bd9Sstevel@tonic-gate strlist.sl_nmods = NMODULES;
937c478bd9Sstevel@tonic-gate strlist.sl_modlist = mlist;
947c478bd9Sstevel@tonic-gate
957c478bd9Sstevel@tonic-gate /*
967c478bd9Sstevel@tonic-gate * parse args
977c478bd9Sstevel@tonic-gate */
987c478bd9Sstevel@tonic-gate if (argc > 1) {
997c478bd9Sstevel@tonic-gate while ((i = getopt(argc, argv, OPTLIST)) != -1) {
1007c478bd9Sstevel@tonic-gate switch (i) {
1017c478bd9Sstevel@tonic-gate case 'm': /* module present ? */
1027c478bd9Sstevel@tonic-gate modp = optarg;
103*4b908718Smeem mod_present = B_TRUE;
1047c478bd9Sstevel@tonic-gate break;
1057c478bd9Sstevel@tonic-gate
1067c478bd9Sstevel@tonic-gate case 't': /* list topmost */
107*4b908718Smeem topmost = B_TRUE;
1087c478bd9Sstevel@tonic-gate break;
1097c478bd9Sstevel@tonic-gate
1107c478bd9Sstevel@tonic-gate default:
1117c478bd9Sstevel@tonic-gate (void) fprintf(stderr, USAGE, Cmd_namep);
1127c478bd9Sstevel@tonic-gate return (ERR_USAGE);
1137c478bd9Sstevel@tonic-gate }
1147c478bd9Sstevel@tonic-gate }
1157c478bd9Sstevel@tonic-gate
1167c478bd9Sstevel@tonic-gate if (optind < argc) {
1177c478bd9Sstevel@tonic-gate (void) fprintf(stderr, USAGE, Cmd_namep);
1187c478bd9Sstevel@tonic-gate return (ERR_USAGE);
1197c478bd9Sstevel@tonic-gate }
1207c478bd9Sstevel@tonic-gate }
1217c478bd9Sstevel@tonic-gate
1227c478bd9Sstevel@tonic-gate if (topmost && mod_present) {
1237c478bd9Sstevel@tonic-gate (void) fprintf(stderr,
124*4b908718Smeem "%s: [-t] and [-m] options cannot be used together\n",
125*4b908718Smeem Cmd_namep);
1267c478bd9Sstevel@tonic-gate (void) fprintf(stderr, USAGE, Cmd_namep);
1277c478bd9Sstevel@tonic-gate return (ERR_USAGE);
1287c478bd9Sstevel@tonic-gate }
1297c478bd9Sstevel@tonic-gate
1307c478bd9Sstevel@tonic-gate /*
1317c478bd9Sstevel@tonic-gate * get number of modules on stream
1327c478bd9Sstevel@tonic-gate * allocate more room if needed
1337c478bd9Sstevel@tonic-gate */
134*4b908718Smeem if ((i = ioctl(STDIN_FILENO, I_LIST, NULL)) < 0) {
1357c478bd9Sstevel@tonic-gate perror("I_LIST");
1367c478bd9Sstevel@tonic-gate (void) fprintf(stderr,
1377c478bd9Sstevel@tonic-gate "%s: I_LIST ioctl failed\n", Cmd_namep);
1387c478bd9Sstevel@tonic-gate return (ERR_STDIN);
1397c478bd9Sstevel@tonic-gate }
1407c478bd9Sstevel@tonic-gate if (i > strlist.sl_nmods)
1417c478bd9Sstevel@tonic-gate if (more_modules(&strlist, i) != SUCCESS)
1427c478bd9Sstevel@tonic-gate return (ERR_MEM);
1437c478bd9Sstevel@tonic-gate
1447c478bd9Sstevel@tonic-gate /*
1457c478bd9Sstevel@tonic-gate * get list of modules on stream
1467c478bd9Sstevel@tonic-gate */
1477c478bd9Sstevel@tonic-gate strlist.sl_nmods = i;
148*4b908718Smeem if (ioctl(STDIN_FILENO, I_LIST, &strlist) < 0) {
1497c478bd9Sstevel@tonic-gate perror("I_LIST");
1507c478bd9Sstevel@tonic-gate (void) fprintf(stderr, "%s: I_LIST ioctl failed\n", Cmd_namep);
1517c478bd9Sstevel@tonic-gate return (ERR_STDIN);
1527c478bd9Sstevel@tonic-gate }
1537c478bd9Sstevel@tonic-gate
1547c478bd9Sstevel@tonic-gate /*
1557c478bd9Sstevel@tonic-gate * list topmost module
1567c478bd9Sstevel@tonic-gate */
1577c478bd9Sstevel@tonic-gate if (topmost) {
1587c478bd9Sstevel@tonic-gate if (strlist.sl_nmods >= 2) {
159*4b908718Smeem (void) puts(strlist.sl_modlist[0].l_name);
1607c478bd9Sstevel@tonic-gate return (SUCCESS);
1617c478bd9Sstevel@tonic-gate }
1627c478bd9Sstevel@tonic-gate return (ERR_MODULE);
1637c478bd9Sstevel@tonic-gate }
1647c478bd9Sstevel@tonic-gate
1657c478bd9Sstevel@tonic-gate /*
1667c478bd9Sstevel@tonic-gate * check if module is present
1677c478bd9Sstevel@tonic-gate */
1687c478bd9Sstevel@tonic-gate if (mod_present) {
1697c478bd9Sstevel@tonic-gate for (i = 0; i < strlist.sl_nmods; i++) {
1707c478bd9Sstevel@tonic-gate if (strncmp(modp, strlist.sl_modlist[i].l_name,
171*4b908718Smeem FMNAMESZ) == 0) {
172*4b908718Smeem (void) puts("yes");
1737c478bd9Sstevel@tonic-gate return (SUCCESS);
1747c478bd9Sstevel@tonic-gate }
1757c478bd9Sstevel@tonic-gate }
176*4b908718Smeem (void) puts("no");
1777c478bd9Sstevel@tonic-gate return (ERR_MODULE);
1787c478bd9Sstevel@tonic-gate }
1797c478bd9Sstevel@tonic-gate
1807c478bd9Sstevel@tonic-gate /*
1817c478bd9Sstevel@tonic-gate * print names of all modules and topmost driver on stream
1827c478bd9Sstevel@tonic-gate */
1837c478bd9Sstevel@tonic-gate for (i = 0; i < strlist.sl_nmods; i++)
184*4b908718Smeem (void) puts(strlist.sl_modlist[i].l_name);
1857c478bd9Sstevel@tonic-gate return (SUCCESS);
1867c478bd9Sstevel@tonic-gate }
1877c478bd9Sstevel@tonic-gate
1887c478bd9Sstevel@tonic-gate /*
1897c478bd9Sstevel@tonic-gate * more_modules(listp, n) allocate space for 'n' modules in 'listp'
1907c478bd9Sstevel@tonic-gate *
1917c478bd9Sstevel@tonic-gate * returns: SUCCESS or FAILURE
1927c478bd9Sstevel@tonic-gate */
1937c478bd9Sstevel@tonic-gate
1947c478bd9Sstevel@tonic-gate static int
more_modules(struct str_list * listp,int n)195*4b908718Smeem more_modules(struct str_list *listp, int n)
1967c478bd9Sstevel@tonic-gate {
197*4b908718Smeem int i;
198*4b908718Smeem struct str_mlist *modp;
1997c478bd9Sstevel@tonic-gate
2007c478bd9Sstevel@tonic-gate if (n > MAXMODULES) {
2017c478bd9Sstevel@tonic-gate (void) fprintf(stderr,
2027c478bd9Sstevel@tonic-gate "%s: too many modules (%d) -- max is %d\n",
2037c478bd9Sstevel@tonic-gate Cmd_namep, n, MAXMODULES);
2047c478bd9Sstevel@tonic-gate return (FAILURE);
2057c478bd9Sstevel@tonic-gate }
2067c478bd9Sstevel@tonic-gate
207*4b908718Smeem if ((modp = calloc(n, sizeof (struct str_mlist))) == NULL) {
2087c478bd9Sstevel@tonic-gate perror("calloc");
2097c478bd9Sstevel@tonic-gate (void) fprintf(stderr,
2107c478bd9Sstevel@tonic-gate "%s: failed to allocate space for module list\n",
2117c478bd9Sstevel@tonic-gate Cmd_namep);
2127c478bd9Sstevel@tonic-gate return (FAILURE);
2137c478bd9Sstevel@tonic-gate }
2147c478bd9Sstevel@tonic-gate
2157c478bd9Sstevel@tonic-gate for (i = 0; i < listp->sl_nmods; ++i)
2167c478bd9Sstevel@tonic-gate (void) strncpy(modp[i].l_name, listp->sl_modlist[i].l_name,
2177c478bd9Sstevel@tonic-gate FMNAMESZ);
2187c478bd9Sstevel@tonic-gate listp->sl_nmods = n;
2197c478bd9Sstevel@tonic-gate listp->sl_modlist = modp;
2207c478bd9Sstevel@tonic-gate return (SUCCESS);
2217c478bd9Sstevel@tonic-gate }
222