diff options
Diffstat (limited to 'usr/src/lib/libvolmgt/common/volname.c')
| -rw-r--r-- | usr/src/lib/libvolmgt/common/volname.c | 778 |
1 files changed, 0 insertions, 778 deletions
diff --git a/usr/src/lib/libvolmgt/common/volname.c b/usr/src/lib/libvolmgt/common/volname.c deleted file mode 100644 index d04ffa22cf..0000000000 --- a/usr/src/lib/libvolmgt/common/volname.c +++ /dev/null @@ -1,778 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License, Version 1.0 only - * (the "License"). You may not use this file except in compliance - * with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 1996 by Sun Microsystems, Inc. - * All rights reserved. - */ - -/*LINTLIBRARY*/ - -#pragma ident "%Z%%M% %I% %E% SMI" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <dirent.h> -#include <string.h> -#include <errno.h> -#include <limits.h> -#include <unistd.h> -#include <volmgt.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/param.h> -#include <sys/vol.h> - -#include "volmgt_private.h" - - - -#define ALIAS_DIR "dev/aliases" -#define HACKNAME_MAX 5 /* max aliases to try */ -#define NUMBUF_SZ 10 /* big enough for HACKNAME */ - - -/* a shortcut for checkinf for absolute pathnames */ -#define IS_ABS_PATH(p) (*(p) == '/') - - -/* - * arc approved interface (pending) - * - can not be modified without approval from an arc - * - * committment level: - * public - * - * description: - * media_findname: try to come up with the character device when - * provided with a starting point. This interface provides the - * application programmer to provide "user friendly" names and - * easily determine the "/vol" name. - * - * arguments: - * start - a string describing a device. This string can be: - * - a full path name to a device (insures it's a - * character device by using getfullrawname()). - * - a full path name to a volume management media name - * with partitions (will return the lowest numbered - * raw partition. - * - the name of a piece of media (e.g. "fred"). - * - a symbolic device name (e.g. floppy0, cdrom0, etc) - * - a name like "floppy" or "cdrom". Will pick the lowest - * numbered device with media in it. - * - * return value(s): - * A pointer to a string that contains the character device - * most appropriate to the "start" argument. - * - * NULL indicates that we were unable to find media based on "start". - * - * The string must be free(3)'d. - * - * preconditions: - * none. - */ -char * -media_findname(char *start) -{ - static char *media_findname_work(char *); - char *s = NULL; - - - /* - * This is just a wrapper to implement the volmgt_check nastyness. - */ -#ifdef DEBUG - denter("media_findname(%s): entering\n", start ? start : "<null ptr>"); -#endif - - if (start == NULL) { - errno = EFAULT; - goto dun; - } - - /* - * If we don't get positive results, we kick volume management - * to ask it to look in the floppy drive. - * - * XXX: maybe this should be configurable ??? - */ - if ((s = media_findname_work(start)) == NULL) { -#ifdef DEBUG - dprintf("media_findname: calling volcheck and trying again\n"); -#endif - (void) volmgt_check(NULL); - s = media_findname_work(start); - } - -dun: -#ifdef DEBUG - dexit("media_findname: returning \"%s\"\n", s ? s : "<null ptr>"); -#endif - return (s); -} - - -/* - * Return a raw name, given a starting point. - * - * Assume: input string ptr is not null - */ -static char * -media_findname_work(char *start) -{ - extern char *vol_basename(char *); - static void volmgt_deref_link(char *, char *, char *); - char pathbuf[MAXPATHLEN+1]; - char *rv; - char *s; - char linkbuf[MAXNAMELEN+1]; - char *nameptr; - struct stat64 sb; - int n; - int i; - static const char *vold_root = NULL; - static char vold_alias_dir[MAXPATHLEN+1]; - char *res = NULL; - DIR *dirp = NULL; - struct dirent64 *dp; - - - -#ifdef DEBUG - denter("media_findname_work(%s): entering\n", start); -#endif - - if (vold_root == NULL) { - vold_root = volmgt_root(); - (void) concat_paths(vold_alias_dir, (char *)vold_root, - (char *)ALIAS_DIR, NULL); - } - - /* - * if this is an absolute path name then - * if it's a symlink deref it - * if it's a raw device then we're done - * else if it's a directory then look for a dev under it - */ - if (IS_ABS_PATH(start)) { - - /* try to get data on name passed in */ - if (lstat64(start, &sb) < 0) { -#ifdef DEBUG - dprintf( - "media_findname_work: lstat of \"%s\" (errno %d)\n", - start, errno); -#endif - goto dun; /* error exit */ - } - - /* - * if is this a link to something else (e.g. ".../floppy0") - * and it's in the volmgt namespace, then deref it - */ - if (S_ISLNK(sb.st_mode) && (strncmp(start, vold_alias_dir, - strlen(vold_alias_dir)) == 0)) { - - /* it's a symlink */ - if ((n = readlink(start, linkbuf, MAXNAMELEN)) <= 0) { - /* we can't read the link */ -#ifdef DEBUG - dprintf( - "media_findname_work: readlink(\"%s\") failed (errno %d)\n", - start, errno); -#endif - goto dun; /* error exit */ - } - linkbuf[n] = NULLC; - - /* dereference the link */ - volmgt_deref_link(pathbuf, start, linkbuf); - - /* stat where "start" pointed at */ - if (stat64(pathbuf, &sb) < 0) { -#ifdef DEBUG - dprintf( - "media_findname_work: stat failed on \"%s\" (errno %d)\n", - pathbuf, errno); -#endif - goto dun; /* error exit */ - } - nameptr = pathbuf; - - } else { - nameptr = start; - } - - /* do we already have a char-spcl device ?? */ - if (S_ISCHR(sb.st_mode)) { - /* - * absoluate pathname of a char-spcl device passed in - */ - res = strdup(nameptr); - goto dun; /* success */ - } - - /* not a char-spcl device -- is it a dir ?? */ - if (S_ISDIR(sb.st_mode)) { - /* open the dir and find first char-spcl device */ - if ((s = getrawpart0(nameptr)) != NULL) { - /* - * absoluate pathname to a directory passed - * in, under which there is at least one - * char-spcl device - */ - free(s); - res = strdup(nameptr); - goto dun; /* success */ - } - } - - /* - * try to get the char-spcl name if this is a blk-spcl - * - * XXX: shouldn't we ensure this is a blk spcl device? - */ - rv = volmgt_getfullrawname(nameptr); - if ((rv == NULL) || (*rv == NULLC)) { - goto dun; /* error exit */ - } - - /* stat the fullrawname device (to see if it's char-spcl) */ - if (stat64(rv, &sb) < 0) { -#ifdef DEBUG - dprintf( - "media_findname_work: stat of \"%s\" (errno %d)\n", - rv, errno); -#endif - goto dun; /* error exit */ - } - - /* have we found the char-spcl device ?? */ - if (S_ISCHR(sb.st_mode)) { - /* - * absolute pathname to block device supplied and - * converted to an absoluate pathname to a char device - */ - res = rv; /* already malloc'ed */ - goto dun; /* success */ - } - - /* - * fullrawname not a char-spcl device -- is it a dir ?? - * - * XXX: didn't we already check for a directory name - * being supplied above? - */ - if (S_ISDIR(sb.st_mode)) { - /* open dir and find first char-spcl device */ - if ((s = getrawpart0(rv)) != NULL) { - /* - * the absolute pathname of directory - * containing at least one char-spcl device - * was passed in - */ - free(s); - res = strdup(rv); - goto dun; /* success */ - } - } - - /* having a full pathname didn't help us */ - goto dun; /* failure -- pathname not found */ - } - - /* - * Ok, now we check to see if it's an alias. - * Note here that in the case of an alias, we prefer - * to return what the alias (symbolic link) points - * at, rather than the symbolic link. Makes for - * nicer printouts and such. - */ - (void) concat_paths(pathbuf, vold_alias_dir, start, NULL); - -#ifdef DEBUG - dprintf("media_findname_work: looking for \"%s\"\n", pathbuf); -#endif - - if (stat64(pathbuf, &sb) == 0) { -#ifdef DEBUG - dprintf("media_findname_work: is \"%s\" a chr-spcl dev?\n", - pathbuf); -#endif - /* is this a char-spcl device ?? */ - if (S_ISCHR(sb.st_mode)) { - /* it's probably a link, so ... */ - if ((n = readlink(pathbuf, - linkbuf, MAXNAMELEN)) <= 0) { - /* - * error (since we are in the symlink - * directory) not a link, but just punt - * anyway - */ - res = strdup(pathbuf); - } else { - /* it was a link */ - linkbuf[n] = NULLC; - res = strdup(linkbuf); - } - goto dun; /* success */ - } - -#ifdef DEBUG - dprintf("media_findname_work: not chr-spcl -- is it a dir?\n"); -#endif - /* not a char-spcl device -- is it a dir ?? */ - if (S_ISDIR(sb.st_mode)) { - /* it's probably a link, so ... */ - if ((n = readlink(pathbuf, - linkbuf, MAXNAMELEN)) <= 0) { - /* - * error, but just punt anyway - */ - nameptr = pathbuf; - s = getrawpart0(pathbuf); - } else { - /* it was a link */ - linkbuf[n] = NULLC; - /* open dir, finding first char-spcl dev */ - nameptr = linkbuf; - s = getrawpart0(linkbuf); - } - if (s != NULL) { - free(s); - res = strdup(nameptr); - goto dun; - } - } - } - - /* - * check all aliases in the alias dir, to see if any match - */ - if ((dirp = opendir(vold_alias_dir)) == NULL) { - goto try_hack; - } - - while (dp = readdir64(dirp)) { - - /* skip uninteresting entries */ - if (strcmp(dp->d_name, ".") == 0) { - continue; - } - if (strcmp(dp->d_name, "..") == 0) { - continue; - } - -#ifdef DEBUG - dprintf("media_findname_work: scanning alias \"%s\" ...\n", - dp->d_name); -#endif - /* - * open the link and see if it points at our entry - */ - (void) concat_paths(pathbuf, vold_alias_dir, dp->d_name, - NULL); - if ((n = readlink(pathbuf, linkbuf, MAXNAMELEN)) <= 0) { -#ifdef DEBUG - dprintf( - "media_findname_work: readlink(\"%s\") failed (errno %d)\n", - pathbuf, errno); -#endif - continue; - } - linkbuf[n] = NULLC; - -#ifdef DEBUG - dprintf("media_findname_work: scanning link \"%s\" ...\n", - linkbuf); -#endif - if (strcmp(vol_basename(linkbuf), start) == 0) { - - /* we *think* we've found a match */ - - if (stat64(linkbuf, &sb) == 0) { - - if (S_ISCHR(sb.st_mode)) { - res = strdup(linkbuf); - goto dun; - } - - if (S_ISDIR(sb.st_mode)) { - res = getrawpart0(linkbuf); - if (res != NULL) { - free(res); - res = strdup(linkbuf); - } - goto dun; - } - - } - - } - } - -try_hack: - - /* - * Ok, well maybe that's not it. Let's try the - * hackname alias. - */ - - /* - * This creates the "hack" name. The model - * is that xx# has the alias xx. So, cdrom# - * and floppy# (the most frequent case) can - * be referred to as cdrom and floppy. - * We poke at what we consider to be a reasonable number of - * devices (currently 5) before giving up. - */ - - for (i = 0; i < HACKNAME_MAX; i++) { - char num_buf[NUMBUF_SZ]; - - - (void) sprintf(num_buf, "%d", i); - (void) concat_paths(pathbuf, vold_alias_dir, start, num_buf); - - if (stat64(pathbuf, &sb) == 0) { - - /* is it a char-spcl device ?? */ - if (S_ISCHR(sb.st_mode)) { - /* it's probably a link, so... */ - if ((n = readlink(pathbuf, - linkbuf, MAXNAMELEN)) <= 0) { - /* it wasn't a link */ - res = strdup(pathbuf); - } else { - /* it was a link */ - linkbuf[n] = NULLC; - res = strdup(linkbuf); - } - goto dun; - } - - /* not a char-spcl device -- is it a dir ?? */ - if (S_ISDIR(sb.st_mode)) { - /* it's probably a link, so ... */ - if ((n = readlink(pathbuf, - linkbuf, MAXNAMELEN)) <= 0) { - /* get fist char-spcl dev in dir */ - nameptr = pathbuf; - s = getrawpart0(pathbuf); - } else { - /* it was a link */ - linkbuf[n] = NULLC; - /* get fist char-spcl dev in dir */ - nameptr = linkbuf; - s = getrawpart0(linkbuf); - } - if (s != NULL) { - free(s); - res = strdup(nameptr); - goto dun; - } - } - } - } - -#ifdef DEBUG - dprintf("media_findname_work: %s didn't match any test!\n", start); -#endif - -dun: - if (dirp != NULL) { - (void) closedir(dirp); - } - -#ifdef DEBUG - dexit("media_findname_work: returning \"%s\"\n", - res ? res : "<null ptr>"); -#endif - return (res); -} - - -/* - * deref the link (in link_buf) read from path_buf into res_buf - * - * if there's any problem then just return the contents of the link buffer - */ -static void -volmgt_deref_link(char *res_buf, char *path_buf, char *link_buf) -{ - static char *vol_dirname(char *); - char buf[MAXPATHLEN+1]; - char *path_dirname; - - - if (IS_ABS_PATH(link_buf)) { - - /* degenerate case -- link is okay the way it is */ - (void) strncpy(res_buf, link_buf, MAXPATHLEN); - - } else { - - /* link pathname is relative */ - - /* get a writable copy of the orig path */ - (void) strncpy(buf, path_buf, MAXPATHLEN); - - /* get the dir from the orig path */ - if ((path_dirname = vol_dirname(buf)) == NULL) { - - /* oh oh -- just use the link contents */ - (void) strncpy(res_buf, link_buf, MAXPATHLEN); - - } else { - - /* concat the orig dir with the link path (if room) */ - (void) concat_paths(res_buf, path_dirname, link_buf, - NULL); - } - } -} - - -/* - * return the dirname part of a path (i.e. all but last component) - * - * NOTE: may destuctively change "path" (i.e. it may write a null over - * the last slash in the path to convert it into a dirname) - */ -static char * -vol_dirname(char *path) -{ - char *cp; - - - /* find the last seperator in the path */ - if ((cp = strrchr(path, '/')) == NULL) { - /* must be just a local name -- use the local dir */ - return ("."); - } - - /* replace the last slash with a null */ - *cp = NULLC; - - /* return all but the last component */ - return (path); -} - - -/* - * This function runs through the list of "old" aliases to - * see if someone is calling a device by an old name before - * the glory of volume management. - */ - -struct alias { - char *alias; - char *name; -}; - -static struct alias volmgt_aliases[] = { - { "fd", "floppy0" }, - { "fd0", "floppy0" }, - { "fd1", "floppy1" }, - { "diskette", "floppy0" }, - { "diskette0", "floppy0" }, - { "diskette1", "floppy1" }, - { "rdiskette", "floppy0" }, - { "rdiskette0", "floppy0" }, - { "rdiskette1", "floppy1" }, - { "cd", "cdrom0" }, - { "cd0", "cdrom0" }, - { "cd1", "cdrom1" }, - { "sr", "cdrom0" }, - { "sr0", "cdrom0" }, - { "/dev/sr0", "cdrom0" }, - { "/dev/rsr0", "cdrom0" }, - { "", ""} -}; - - -/* - * "old" aliases -- XXX: only make sense if vold not running? - */ -static struct alias device_aliases[] = { - { "fd", "/dev/rdiskette" }, - { "fd0", "/dev/rdiskette" }, - { "fd1", "/dev/rdiskette1" }, - { "diskette", "/dev/rdiskette" }, - { "diskette0", "/dev/rdiskette0" }, - { "diskette1", "/dev/rdiskette1" }, - { "rdiskette", "/dev/rdiskette" }, - { "rdiskette0", "/dev/rdiskette0" }, - { "rdiskette1", "/dev/rdiskette1" }, - { "floppy", "/dev/rdiskette" }, - { "floppy0", "/dev/rdiskette0" }, - { "floppy1", "/dev/rdiskette1" }, - { "cd", "cdrom0" }, - { "cd0", "cdrom0" }, - { "cd1", "cdrom1" }, - { "", ""} -}; - - -/* - * This is an ON Consolidation Private interface. - */ -char * -_media_oldaliases(char *start) -{ - struct alias *s, *ns; - char *p; - char *res; - - - -#ifdef DEBUG - denter("_media_oldaliases(%s): entering\n", start); -#endif - - for (s = device_aliases; *s->alias != NULLC; s++) { - if (strcmp(start, s->alias) == 0) { - break; - } - } - - /* we don't recognize that alias at all */ - if (*s->alias == NULLC) { -#ifdef DEBUG - dprintf("_media_oldaliases: failed\n"); -#endif - res = NULL; - goto dun; - } - - /* if volume management isn't running at all, give him back the name */ - if (!volmgt_running()) { -#ifdef DEBUG - dprintf("_media_oldaliases: no vold!\n"); -#endif - res = strdup(s->name); - goto dun; - } - /* - * If volume management is managing that device, look up the - * volume management name. - */ - if (volmgt_inuse(s->name)) { - for (s = volmgt_aliases; *s->alias != NULLC; s++) { - if (strcmp(start, s->alias) == 0) { - res = strdup(s->name); - goto dun; - } - } -#ifdef DEBUG - dprintf("_media_oldaliases: failed\n"); -#endif - res = NULL; - goto dun; - } - - /* - * If volume management isn't managing the device, it's possible - * that he's given us an alias that we should recognize, but the - * default name is wrong. For example a user might have his - * cdrom on controller 1, being managed by volume management, - * but we would think it isn't because volmgt_inuse just told - * us that c0t6d0s2 isn't being managed. So, before we return - * the /dev name, we'll test the alias out using media_findname. - * If media_findname can't make sense out of the alias, it probably - * means that we really, really aren't managing the device and - * should just return the /dev name. Whew. Isn't this grody? - */ - - for (ns = volmgt_aliases; *ns->alias != NULLC; ns++) { - if (strcmp(start, ns->alias) == 0) { - if ((p = media_findname_work(ns->name))) { - res = p; - goto dun; - } else { - break; - } - } - } - - res = strdup(s->name); -dun: -#ifdef DEBUG - dexit("_media_oldaliases: returning %s\n", res ? res : "<null ptr>"); -#endif - return (res); -} - - -/* - * This is an ON Consolidation Private interface. - * - * Print out the aliases available to the program user. Changes - * depending in whether volume management is running. - */ -void -_media_printaliases(void) -{ - struct alias *s; - DIR *dirp; - struct dirent64 *dp; - char pathbuf[MAXPATHLEN+1]; - char *p; - static const char *vold_root = NULL; - - - - if (vold_root == NULL) { - vold_root = volmgt_root(); - } - - if (!volmgt_running()) { - /* no volume management */ - for (s = device_aliases; *s->alias != NULLC; s++) { - (void) printf("\t%s -> %s\n", s->alias, s->name); - } - return; - } - - for (s = volmgt_aliases; *s->alias != NULLC; s++) { - (void) printf("\t%s -> %s\n", s->alias, s->name); - } - - (void) concat_paths(pathbuf, (char *)vold_root, ALIAS_DIR, NULL); - - if ((dirp = opendir(pathbuf)) == NULL) { - return; - } - while (dp = readdir64(dirp)) { - if (strcmp(dp->d_name, ".") == 0) { - continue; - } - if (strcmp(dp->d_name, "..") == 0) { - continue; - } - if ((p = media_findname(dp->d_name)) != NULL) { - (void) printf("\t%s -> %s\n", dp->d_name, p); - } - } - (void) closedir(dirp); -} |