| * where everything is defaulted␊ |
| * Add routine, ptol(), to parse partition letters.␊ |
| *␊ |
| */␊ |
| ␊ |
| /*␊ |
| * Copyright (c) 1982, 1986 Regents of the University of California.␊ |
| * All rights reserved. The Berkeley software License Agreement␊ |
| * specifies the terms and conditions for redistribution.␊ |
| *␊ |
| *␉@(#)sys.c␉7.1 (Berkeley) 6/5/86␊ |
| *␊ |
| * Copyright 2007 VMware Inc. "Preboot" ramdisk support added by David Elliott␊ |
| *␊ |
| */␊ |
| ␊ |
| /* Copyright 2007 VMware Inc.␊ |
| "Preboot" ramdisk support added by David Elliott␊ |
| */␊ |
| ␊ |
| ␊ |
| #include "libsaio.h"␊ |
| #include "boot.h"␊ |
| #include "bootstruct.h"␊ |
|
| extern int multiboot_skip_partition;␊ |
| extern int multiboot_skip_partition_set;␊ |
| ␊ |
| struct devsw {␊ |
| struct devsw␊ |
| {␊ |
| ␉const char * name;␊ |
| ␉// size increased from char to short to handle non-BIOS internal devices␊ |
| ␉unsigned short biosdev;␊ |
|
| ␊ |
| void * gFSLoadAddress = 0;␊ |
| ␊ |
| #define LP '('␊ |
| #define RP ')'␊ |
| ␊ |
| int gBIOSDev;␊ |
| ␊ |
| // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
| BVRef gBIOSBootVolume = NULL;␊ |
| BVRef gBootVolume;␊ |
|
| ␊ |
| //==========================================================================␊ |
| // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
| // Load the specified file from the specified volume␊ |
| // to the load buffer at LOAD_ADDR.␊ |
| // If the file is fat, load only the i386 portion.␊ |
| // Load the specified file from the specified volume␊ |
| // to the load buffer at LOAD_ADDR.␊ |
| // If the file is fat, load only the i386 portion.␊ |
| ␊ |
| long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
| {␊ |
| long fileSize;␊ |
| ␉long fileSize;␊ |
| ␊ |
| // Read file into load buffer. The data in the load buffer will be␊ |
| // overwritten by the next LoadFile() call.␊ |
| ␉// Read file into load buffer. The data in the load buffer will be␊ |
| ␉// overwritten by the next LoadFile() call.␊ |
| ␊ |
| gFSLoadAddress = (void *) LOAD_ADDR;␊ |
| ␉gFSLoadAddress = (void *) LOAD_ADDR;␊ |
| ␊ |
| fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
| ␉fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
| ␊ |
| // Return the size of the file, or -1 if load failed.␊ |
| ␉// Return the size of the file, or -1 if load failed.␊ |
| ␊ |
| return fileSize;␊ |
| ␉return fileSize;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
| // Load the specified file to the load buffer at LOAD_ADDR.␊ |
| // If the file is fat, load only the i386 portion.␊ |
| // Load the specified file to the load buffer at LOAD_ADDR.␊ |
| // If the file is fat, load only the i386 portion.␊ |
| ␊ |
| long LoadFile(const char * fileSpec)␊ |
| {␊ |
|
| ␊ |
| long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
| {␊ |
| ␉const char␉*filePath;␊ |
| ␉const char␉*filePath = "";␊ |
| ␉FSReadFile␉readFile;␊ |
| ␉BVRef␉␉bvr;␊ |
| ␉unsigned long length, length2;␊ |
| ␉unsigned long␉length;␊ |
| ␉unsigned long␉length2;␊ |
| ␊ |
| ␉// Resolve the boot volume from the file spec.␊ |
| ␊ |
|
| ␉}␊ |
| ␊ |
| ␉*binary = (void *)kLoadAddr;␊ |
| ␊ |
| ␊ |
| ␉// Read file into load buffer. The data in the load buffer will be␊ |
| ␉// overwritten by the next LoadFile() call.␊ |
| ␊ |
| ␉gFSLoadAddress = (void *) LOAD_ADDR;␊ |
| ␊ |
| ␉readFile = bvr->fs_readfile;␊ |
| ␊ |
| ␊ |
| ␉if (readFile != NULL)␊ |
| ␉{␊ |
| ␉␉// Read the first 4096 bytes (fat header)␊ |
|
| ␉␉return -1;␊ |
| ␉}␊ |
| ␊ |
| ␉if(bvr->fs_getuuid) {␊ |
| ␉if(bvr->fs_getuuid)␊ |
| ␉{␊ |
| ␉␉rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
| ␉}␊ |
| ␊ |
|
| }␊ |
| #endif␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| // filesystem-specific getUUID functions call this shared string generator␊ |
| ␊ |
| long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
| {␊ |
| unsigned fmtbase, fmtidx, i;␊ |
| uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
| char *p = uuidStr;␊ |
| MD5_CTX md5c;␊ |
| uint8_t mdresult[16];␊ |
| ␉unsigned␉fmtbase, fmtidx, i;␊ |
| ␉uint8_t␉␉uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
| ␉char␉␉*p = uuidStr;␊ |
| ␉MD5_CTX␉␉md5c;␊ |
| ␉uint8_t␉␉mdresult[16];␊ |
| ␊ |
| bzero(mdresult, sizeof(mdresult));␊ |
| ␉bzero(mdresult, sizeof(mdresult));␊ |
| ␊ |
| // just like AppleFileSystemDriver␊ |
| MD5Init(&md5c);␊ |
| MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
| MD5Update(&md5c, uubytes, nbytes);␊ |
| MD5Final(mdresult, &md5c);␊ |
| ␉// just like AppleFileSystemDriver␊ |
| ␉MD5Init(&md5c);␊ |
| ␉MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
| ␉MD5Update(&md5c, uubytes, nbytes);␊ |
| ␉MD5Final(mdresult, &md5c);␊ |
| ␊ |
| // this UUID has been made version 3 style (i.e. via namespace)␊ |
| // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
| mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
| mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
| ␉// this UUID has been made version 3 style (i.e. via namespace)␊ |
| ␉// see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
| ␉mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
| ␉mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
| ␊ |
| ␊ |
| // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
| ␉// generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
| ␉i = 0;␊ |
| ␉fmtbase = 0;␊ |
| ␊ |
| ␉for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++)␊ |
| ␉for (fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++)␊ |
| ␉{␊ |
| ␉␉for (i = 0; i < uuidfmt[fmtidx]; i++)␊ |
| ␉␉{␊ |
|
| ␊ |
| //==========================================================================␊ |
| // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
| // Fetch the next directory entry for the given directory.␊ |
| // Fetch the next directory entry for the given directory.␊ |
| ␊ |
| long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
| long * flags, u_int32_t * time)␊ |
| long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, long * flags, u_int32_t * time)␊ |
| {␊ |
| ␉const char * dirPath;␊ |
| ␉BVRef bvr;␊ |
| ␉const char␉*dirPath;␊ |
| ␉BVRef␉␉bvr;␊ |
| ␊ |
| ␉// Resolve the boot volume from the dir spec.␊ |
| ␊ |
|
| ␊ |
| //==========================================================================␊ |
| // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
| // Get attributes for the specified file.␊ |
| // Get attributes for the specified file.␊ |
| ␊ |
| static char* gMakeDirSpec;␊ |
| ␊ |
| long GetFileInfo(const char * dirSpec, const char * name,␊ |
| long * flags, u_int32_t * time)␊ |
| long GetFileInfo(const char * dirSpec, const char * name, long * flags, u_int32_t * time)␊ |
| {␊ |
| ␉long long index = 0;␊ |
| ␉const char * entryName;␊ |
|
| ␉␉gMakeDirSpec = (char *)malloc(1024);␊ |
| ␉}␊ |
| ␊ |
| ␉if (!dirSpec) {␊ |
| ␉␉long idx, len;␊ |
| ␊ |
| ␉if (!dirSpec)␊ |
| ␉{␊ |
| ␉␉long␉idx;␊ |
| ␉␉long␉len;␊ |
| ␉␉len = strlen(name);␊ |
| ␊ |
| ␉␉for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
| ␉␉if (idx == 0) {␊ |
| ␉␉␉if(name[idx] == '/' || name[idx] == '\\') ++name; // todo: ensure other functions handel \ properly␊ |
| ␊ |
| ␉␉if (idx == 0)␊ |
| ␉␉{␊ |
| ␉␉␉if(name[idx] == '/' || name[idx] == '\\')␊ |
| ␉␉␉{␊ |
| ␉␉␉␉++name; // todo: ensure other functions handel \ properly␊ |
| ␉␉␉}␊ |
| ␉␉␉gMakeDirSpec[0] = '/';␊ |
| ␉␉␉gMakeDirSpec[1] = '\0';␊ |
| ␉␉␉gMakeDirSpec[idx] = '\0';␊ |
| ␉␉} else {␊ |
| ␉␉}␊ |
| ␉␉else␊ |
| ␉␉{␊ |
| ␉␉␉idx++;␊ |
| ␉␉␉strncpy(gMakeDirSpec, name, idx);␊ |
| ␉␉␉gMakeDirSpec[idx] = '\0'; // ISSUE: http://forge.voodooprojects.org/p/chameleon/issues/270/␊ |
|
| ␊ |
| ␉// Resolve the boot volume from the file spec.␊ |
| ␊ |
| ␉if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
| ␉if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
| ␉{␊ |
| ␉␉// printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
| ␉␉return -1;␊ |
| ␉}␊ |
|
| ␉int␉␉fdesc;␊ |
| ␉int␉␉i;␊ |
| ␊ |
| ␉if (bvr == NULL) {␊ |
| ␉if (bvr == NULL)␊ |
| ␉{␊ |
| ␉␉return -1;␊ |
| ␉}␊ |
| ␊ |
|
| ␊ |
| ␉// Find the next available memory block in the download buffer.␊ |
| ␉io->i_buf = (char *) LOAD_ADDR;␊ |
| ␉for (i = 0; i < NFILES; i++) {␊ |
| ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
| ␉for (i = 0; i < NFILES; i++)␊ |
| ␉{␊ |
| ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc))␊ |
| ␉␉{␊ |
| ␉␉␉continue;␊ |
| ␉␉}␊ |
| ␊ |
| ␉␉io->i_buf = MAX(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
| ␉}␊ |
| ␊ |
| ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
| ␉gFSLoadAddress = io->i_buf;␊ |
| ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
| ␉if (io->i_filesize < 0) {␊ |
| ␉if (io->i_filesize < 0)␊ |
| ␉{␊ |
| ␉␉close(fdesc);␊ |
| ␉␉return -1;␊ |
| ␉}␊ |
|
| ␉return -1;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| int open_bvdev(const char *bvd, const char *path, int flags)␊ |
| {␊ |
| ␉const struct devsw␉*dp;␊ |
| ␉const char␉␉␉*cp;␊ |
| ␉BVRef␉␉␉␉bvr;␊ |
| ␉int␉␉␉␉␉i;␊ |
| ␉int␉␉␉␉␉len;␊ |
| ␉int␉␉␉␉␉unit;␊ |
| ␉int␉␉␉␉␉partition;␊ |
| ␉const char␉␉*cp;␊ |
| ␉BVRef␉␉␉bvr;␊ |
| ␉int␉␉␉i;␊ |
| ␉int␉␉␉len;␊ |
| ␉int␉␉␉unit;␊ |
| ␉int␉␉␉partition;␊ |
| ␊ |
| ␉if ((i = open(path, flags)) >= 0)␊ |
| ␉{␊ |
|
| ␊ |
| //==========================================================================␊ |
| // lseek() - Reposition the byte offset of the file descriptor from the␊ |
| // beginning of the file. Returns the relocated offset.␊ |
| // beginning of the file. Returns the relocated offset.␊ |
| ␊ |
| int b_lseek(int fdesc, int offset, int ptr)␊ |
| {␊ |
|
| ␊ |
| //==========================================================================␊ |
| // read() - Read up to 'count' bytes of data from the file descriptor␊ |
| // into the buffer pointed to by buf.␊ |
| // into the buffer pointed to by buf.␊ |
| ␊ |
| int read(int fdesc, char * buf, int count)␊ |
| {␊ |
| ␉struct iob * io;␊ |
| ␊ |
| ␉if ((io = iob_from_fdesc(fdesc)) == NULL) {␊ |
| ␉if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
| ␉{␊ |
| ␉␉return (-1);␊ |
| ␉}␊ |
| ␊ |
| ␉if ((io->i_offset + count) > (unsigned int)io->i_filesize) {␊ |
| ␉if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
| ␉{␊ |
| ␉␉count = io->i_filesize - io->i_offset;␊ |
| ␉}␊ |
| ␊ |
| ␉if (count <= 0) {␊ |
| ␉if (count <= 0)␊ |
| ␉{␊ |
| ␉␉return 0; // end of file␊ |
| ␉}␊ |
| ␊ |
|
| int write(int fdesc, const char * buf, int count)␊ |
| {␊ |
| struct iob * io;␊ |
| ␊ |
| ␊ |
| if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
| return (-1);␊ |
| ␉␊ |
| ␊ |
| if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
| count = io->i_filesize - io->i_offset;␊ |
| ␉␊ |
| ␊ |
| if (count <= 0)␊ |
| return 0; // end of file␊ |
| ␉␊ |
| ␊ |
| bcopy(buf, io->i_buf + io->i_offset, count);␊ |
| ␉␊ |
| ␊ |
| io->i_offset += count;␊ |
| ␉␊ |
| ␊ |
| return count;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| int writebyte(int fdesc, char value)␊ |
| {␊ |
| struct iob * io;␊ |
| ␊ |
| if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
| ␉struct iob * io;␊ |
| ␊ |
| ␉if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
| return (-1);␊ |
| ␉␊ |
| ␊ |
| if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
| return 0; // end of file␊ |
| ␉␊ |
| ␊ |
| io->i_buf[io->i_offset++] = value;␊ |
| ␉␊ |
| ␊ |
| return 1;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| int writeint(int fdesc, int value)␊ |
| {␊ |
| struct iob * io;␊ |
| ␊ |
| ␊ |
| if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
| return (-1);␊ |
| ␉␊ |
| ␊ |
| if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
| return 0; // end of file␊ |
| ␉␊ |
| ␊ |
| bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
| ␉␊ |
| ␊ |
| io->i_offset += 4;␊ |
| ␉␊ |
| ␊ |
| return 4;␊ |
| }␊ |
| ␊ |
|
| {␊ |
| ␉struct iob * io;␊ |
| ␊ |
| ␉if ((io = iob_from_fdesc(fdesc)) == 0) {␊ |
| ␉if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
| ␉{␊ |
| ␉␉return 0;␊ |
| ␉}␊ |
| ␊ |
|
| ␉const char * dirPath;␊ |
| ␉BVRef bvr;␊ |
| ␊ |
| if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
| goto error;␊ |
| ␉if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
| ␉␉goto error;␊ |
| ␊ |
| dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
| if (dirp == NULL)␊ |
| goto error;␊ |
| ␉dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
| ␉if (dirp == NULL)␊ |
| ␉␉goto error;␊ |
| ␊ |
| dirp->dir_path = newString(dirPath);␊ |
| if (dirp->dir_path == NULL)␊ |
| goto error;␊ |
| ␉dirp->dir_path = newString(dirPath);␊ |
| ␉if (dirp->dir_path == NULL)␊ |
| ␉␉goto error;␊ |
| ␊ |
| dirp->dir_bvr = bvr;␊ |
| ␉dirp->dir_bvr = bvr;␊ |
| ␊ |
| return dirp;␊ |
| ␊ |
| error:␊ |
| closedir(dirp);␊ |
| return NULL;␊ |
| ␉closedir(dirp);␊ |
| ␊ |
| ␉return NULL;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| int closedir(struct dirstuff * dirp)␊ |
| {␊ |
| ␉if (dirp) {␊ |
| ␉␉if (dirp->dir_path) {␊ |
| ␉if (dirp)␊ |
| ␉{␊ |
| ␉␉if (dirp->dir_path)␊ |
| ␉␉{␊ |
| ␉␉␉free(dirp->dir_path);␊ |
| ␉␉}␊ |
| ␊ |
| ␉␉free(dirp);␊ |
| ␉}␊ |
| ␊ |
| return 0;␊ |
| ␉return 0;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
| ␉u_int32_t * time)␊ |
| int readdir(struct dirstuff * dirp, const char ** name, long * flags, u_int32_t * time)␊ |
| {␊ |
| ␉return dirp->dir_bvr->fs_getdirentry(dirp->dir_bvr,␊ |
| ␉␉/* dirPath */ dirp->dir_path,␊ |
|
| ␊ |
| //==========================================================================␊ |
| ␊ |
| int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
| ␉u_int32_t * time, FinderInfo *finderInfo, long *infoValid)␊ |
| int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags, u_int32_t * time, FinderInfo *finderInfo, long *infoValid)␊ |
| {␊ |
| ␉return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
| ␉␉␉/* dirPath */ dirp->dir_path,␊ |
|
| ␉{␊ |
| ␉␉filteredChain = true;␊ |
| ␉}␊ |
| ␉␊ |
| ␊ |
| ␉if (multiboot_partition_set)␊ |
| ␉{␊ |
| ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
|
| ␉␉␉␉continue;␊ |
| ␉␉␉}␊ |
| ␉␉}␊ |
| ␊ |
| ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev )␊ |
| ␉␉{␊ |
| ␉␉␉foundPrimary = true;␊ |
|
| ␉␉␉}␊ |
| ␉␉}␊ |
| ␉}␊ |
| ␉␊ |
| ␊ |
| ␉bvr = bvr2 ? bvr2 :␊ |
| ␉bvr1 ? bvr1 : chain;␊ |
| ␉␊ |
| ␊ |
| ␉return bvr;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| #define LP '('␊ |
| #define RP ')'␊ |
| int gBIOSDev;␊ |
| ␊ |
| /*!␊ |
| This is like boot2's gBootVolume except it is for the internal use of␊ |
|
| */␊ |
| static BVRef gRootVolume;␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| void setRootVolume(BVRef volume)␊ |
| {␊ |
| ␉gRootVolume = volume;␊ |
|
| ␉}␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| ␊ |
| void setBootGlobals(BVRef chain)␊ |
| {␊ |
| ␉// Record default boot device.␊ |
|
| ␉setRootVolume(gBootVolume);␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
| /*!␊ |
| Extracts the volume selector from the pathname, returns the selected␊ |
| BVRef, and sets *outPath to the remainder of the path.␊ |
|
| */␊ |
| BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
| {␊ |
| const char * cp;␊ |
| BVRef bvr = gRootVolume;␊ |
| int biosdev = gBIOSDev;␊ |
| ␉const char␉*cp;␊ |
| ␉BVRef bvr␉= gRootVolume;␊ |
| ␉int biosdev␉= gBIOSDev;␊ |
| ␊ |
| // Search for left parenthesis in the path specification.␊ |
| ␉// Search for left parenthesis in the path specification.␊ |
| ␊ |
| ␉for (cp = path; *cp; cp++) {␊ |
| ␉for (cp = path; *cp; cp++)␊ |
| ␉{␊ |
| ␉␉if (*cp == LP || *cp == '/')␊ |
| ␉␉{␊ |
| ␉␉␉break;␊ |
| ␉␉}␊ |
| ␉}␊ |
| ␊ |
| ␉if (*cp != LP) { // no left paren found␊ |
| ␉if (*cp != LP) // no left paren found␊ |
| ␉{␊ |
| ␉␉cp = path;␊ |
| ␉␉// Path is using the implicit current device so if there is␊ |
| ␉␉// no current device, then we must fail.␊ |
|
| ␉␉{␊ |
| ␉␉␉return NULL;␊ |
| ␉␉}␊ |
| ␉} else if ((cp - path) == 2) { // found "xx("␊ |
| ␉}␊ |
| ␉else if ((cp - path) == 2) // found "xx("␊ |
| ␉{␊ |
| ␉␉const struct devsw * dp;␊ |
| ␉␉const char * xp = path;␊ |
| ␊ |
|
| ␉␉␉error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
| ␉␉␉return NULL;␊ |
| ␉␉}␊ |
| ␊ |
| ␊ |
| ␉␉// Extract the optional unit number from the specification.␊ |
| ␉␉// hd(unit) or hd(unit, part).␊ |
| ␊ |
|
| ␉␉␉}␊ |
| ␊ |
| ␉␉␉bvr1 = bvr;␊ |
| ␊ |
| ␉␉␉if ( bvr->part_no == partno )␊ |
| ␉␉␉{␊ |
| ␉␉␉␉break;␊ |
|
| ␉{␊ |
| ␉␉return 0;␊ |
| ␉}␊ |
| ␊ |
| ␊ |
| ␉*str = '\0';␊ |
| ␊ |
| ␉if (bvr)␊ |
|
| ␉␉␉return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
| ␉␉}␊ |
| ␉}␊ |
| ␉␊ |
| ␊ |
| ␉return 0;␊ |
| }␊ |
| ␊ |
| //==========================================================================␊ |
