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[/] [eco32/] [tags/] [eco32-0.23/] [disk/] [tools/] [fs-EOS32/] [mkfs/] [mkfs.c] - Rev 272
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/* * mkfs.c -- make an EOS32 file system */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <time.h> /**************************************************************/ #define SSIZE 512 /* disk sector size in bytes */ #define BSIZE 4096 /* disk block size in bytes */ #define SPB (BSIZE / SSIZE) /* sectors per block */ #define AFS (3 * BSIZE / 2) /* average file size */ #define NICINOD 500 /* number of inodes in superblock */ #define NICFREE 500 /* number of free blocks in superblock */ #define NADDR 8 /* number of block addresses in inode */ #define NDADDR 6 /* number of direct block addresses */ #define SINGLE_INDIR (NDADDR + 0) /* index of single indirect block */ #define DOUBLE_INDIR (NDADDR + 1) /* index of double indirect block */ #define DIRSIZ 60 /* max length of a path name component */ #define NIPB (BSIZE / sizeof(Dinode)) #define NDIRENT (BSIZE / sizeof(Dirent)) #define NINDIR (BSIZE / sizeof(EOS32_daddr_t)) #define SUPER_MAGIC 0x44FCB67D #define IFMT 070000 /* type of file */ #define IFREG 040000 /* regular file */ #define IFDIR 030000 /* directory */ #define IFCHR 020000 /* character special */ #define IFBLK 010000 /* block special */ #define IFFREE 000000 /* reserved (indicates free inode) */ #define ISUID 004000 /* set user id on execution */ #define ISGID 002000 /* set group id on execution */ #define ISVTX 001000 /* save swapped text even after use */ #define IUREAD 000400 /* user's read permission */ #define IUWRITE 000200 /* user's write permission */ #define IUEXEC 000100 /* user's execute permission */ #define IGREAD 000040 /* group's read permission */ #define IGWRITE 000020 /* group's write permission */ #define IGEXEC 000010 /* group's execute permission */ #define IOREAD 000004 /* other's read permission */ #define IOWRITE 000002 /* other's write permission */ #define IOEXEC 000001 /* other's execute permission */ /* * The following two macros convert an inode number to the disk * block containing the inode and an inode number within the block. */ #define itod(i) (2 + (i) / NIPB) #define itoo(i) ((i) % NIPB) #define TYPE_COPY 0 #define TYPE_INODE 1 #define TYPE_FREE 2 #define TYPE_SUPER 3 #define TYPE_INDIRECT 4 #define TYPE_DIRECTORY 5 /**************************************************************/ /* EOS32 types */ typedef unsigned long EOS32_ino_t; typedef unsigned long EOS32_daddr_t; typedef unsigned long EOS32_off_t; typedef long EOS32_time_t; /* super block */ typedef struct { unsigned int s_magic; /* must be SUPER_MAGIC */ EOS32_daddr_t s_fsize; /* size of file system in blocks */ EOS32_daddr_t s_isize; /* size of inode list in blocks */ EOS32_daddr_t s_freeblks; /* number of free blocks */ EOS32_ino_t s_freeinos; /* number of free inodes */ unsigned int s_ninode; /* number of inodes in s_inode */ EOS32_ino_t s_inode[NICINOD]; /* free inode list */ unsigned int s_nfree; /* number of addresses in s_free */ EOS32_daddr_t s_free[NICFREE]; /* free block list */ EOS32_time_t s_time; /* last super block update */ char s_flock; /* lock for free list manipulation */ char s_ilock; /* lock for i-list manipulation */ char s_fmod; /* super block modified flag */ char s_ronly; /* mounted read-only flag */ char s_pad[BSIZE - 4036]; /* pad to block size */ } Filsys; /* inode on disk */ typedef struct { unsigned int di_mode; /* type and mode of file */ unsigned int di_nlink; /* number of links to file */ unsigned int di_uid; /* owner's user id */ unsigned int di_gid; /* owner's group id */ EOS32_time_t di_ctime; /* time created */ EOS32_time_t di_mtime; /* time last modified */ EOS32_time_t di_atime; /* time last accessed */ EOS32_off_t di_size; /* number of bytes in file */ EOS32_daddr_t di_addr[NADDR]; /* block addresses */ } Dinode; /* inode in memory */ typedef struct { EOS32_ino_t i_number; /* inode number */ unsigned int i_mode; /* type and mode of file */ unsigned int i_nlink; /* number of links to file */ unsigned int i_uid; /* owner's user id */ unsigned int i_gid; /* owner's group id */ EOS32_off_t i_size; /* number of bytes in file */ EOS32_daddr_t i_addr[NADDR]; /* block addresses */ } Inode; /* directory entry */ typedef struct { EOS32_ino_t d_ino; /* directory inode */ char d_name[DIRSIZ]; /* directory name */ } Dirent; /* free block */ typedef struct { unsigned int df_nfree; /* number of valid block addresses */ EOS32_daddr_t df_free[NICFREE]; /* addresses of free blocks */ char df_pad[BSIZE - 2004]; /* pad to block size */ } Fblk; /**************************************************************/ time_t now; /* timestamp used throughout the file system */ FILE *fs; /* the file which holds the disk image */ Filsys filsys; /* the file system's super block */ EOS32_ino_t lastIno; /* last inode allocated */ /**************************************************************/ void error(char *fmt, ...) { va_list ap; va_start(ap, fmt); printf("Error: "); vprintf(fmt, ap); printf("\n"); va_end(ap); exit(1); } /**************************************************************/ unsigned int read4FromEco(unsigned char *p) { return (unsigned int) p[0] << 24 | (unsigned int) p[1] << 16 | (unsigned int) p[2] << 8 | (unsigned int) p[3] << 0; } void write4ToEco(unsigned char *p, unsigned int data) { p[0] = data >> 24; p[1] = data >> 16; p[2] = data >> 8; p[3] = data >> 0; } void conv4FromEcoToX86(unsigned char *p) { unsigned int data; data = read4FromEco(p); * (unsigned int *) p = data; } void conv4FromX86ToEco(unsigned char *p) { unsigned int data; data = * (unsigned int *) p; write4ToEco(p, data); } /**************************************************************/ void superFromEcoToX86(unsigned char *p) { int i; /* magic */ conv4FromEcoToX86(p); p += 4; /* fsize */ conv4FromEcoToX86(p); p += 4; /* isize */ conv4FromEcoToX86(p); p += 4; /* freeblks */ conv4FromEcoToX86(p); p += 4; /* freeinos */ conv4FromEcoToX86(p); p += 4; /* ninode */ conv4FromEcoToX86(p); p += 4; /* inode */ for (i = 0; i < NICINOD; i++) { conv4FromEcoToX86(p); p += 4; } /* nfree */ conv4FromEcoToX86(p); p += 4; /* free */ for (i = 0; i < NICFREE; i++) { conv4FromEcoToX86(p); p += 4; } /* time */ conv4FromEcoToX86(p); p += 4; /* flock */ p += 1; /* ilock */ p += 1; /* fmod */ p += 1; /* ronly */ p += 1; } void superFromX86ToEco(unsigned char *p) { int i; /* magic */ conv4FromX86ToEco(p); p += 4; /* fsize */ conv4FromX86ToEco(p); p += 4; /* isize */ conv4FromX86ToEco(p); p += 4; /* freeblks */ conv4FromX86ToEco(p); p += 4; /* freeinos */ conv4FromX86ToEco(p); p += 4; /* ninode */ conv4FromX86ToEco(p); p += 4; /* inode */ for (i = 0; i < NICINOD; i++) { conv4FromX86ToEco(p); p += 4; } /* nfree */ conv4FromX86ToEco(p); p += 4; /* free */ for (i = 0; i < NICFREE; i++) { conv4FromX86ToEco(p); p += 4; } /* time */ conv4FromX86ToEco(p); p += 4; /* flock */ p += 1; /* ilock */ p += 1; /* fmod */ p += 1; /* ronly */ p += 1; } void inodeFromEcoToX86(unsigned char *p) { int i, j; for (i = 0; i < NIPB; i++) { /* mode */ conv4FromEcoToX86(p); p += 4; /* nlink */ conv4FromEcoToX86(p); p += 4; /* uid */ conv4FromEcoToX86(p); p += 4; /* gid */ conv4FromEcoToX86(p); p += 4; /* ctime */ conv4FromEcoToX86(p); p += 4; /* mtime */ conv4FromEcoToX86(p); p += 4; /* atime */ conv4FromEcoToX86(p); p += 4; /* size */ conv4FromEcoToX86(p); p += 4; /* addr */ for (j = 0; j < NADDR; j++) { conv4FromEcoToX86(p); p += 4; } } } void inodeFromX86ToEco(unsigned char *p) { int i, j; for (i = 0; i < NIPB; i++) { /* mode */ conv4FromX86ToEco(p); p += 4; /* nlink */ conv4FromX86ToEco(p); p += 4; /* uid */ conv4FromX86ToEco(p); p += 4; /* gid */ conv4FromX86ToEco(p); p += 4; /* ctime */ conv4FromX86ToEco(p); p += 4; /* mtime */ conv4FromX86ToEco(p); p += 4; /* atime */ conv4FromX86ToEco(p); p += 4; /* size */ conv4FromX86ToEco(p); p += 4; /* addr */ for (j = 0; j < NADDR; j++) { conv4FromX86ToEco(p); p += 4; } } } void freeFromEcoToX86(unsigned char *p) { int i; /* nfree */ conv4FromEcoToX86(p); p += 4; /* free */ for (i = 0; i < NICFREE; i++) { conv4FromEcoToX86(p); p += 4; } } void freeFromX86ToEco(unsigned char *p) { int i; /* nfree */ conv4FromX86ToEco(p); p += 4; /* free */ for (i = 0; i < NICFREE; i++) { conv4FromX86ToEco(p); p += 4; } } void indirectFromEcoToX86(unsigned char *p) { int i; for (i = 0; i < NINDIR; i++) { conv4FromEcoToX86(p); p += 4; } } void indirectFromX86ToEco(unsigned char *p) { int i; for (i = 0; i < NINDIR; i++) { conv4FromX86ToEco(p); p += 4; } } void directoryFromEcoToX86(unsigned char *p) { int i; for (i = 0; i < NDIRENT; i++) { conv4FromEcoToX86(p); p += 4; p += DIRSIZ; } } void directoryFromX86ToEco(unsigned char *p) { int i; for (i = 0; i < NDIRENT; i++) { conv4FromX86ToEco(p); p += 4; p += DIRSIZ; } } /**************************************************************/ unsigned long fsStart; /* file system start sector */ void rdfs(EOS32_daddr_t bno, unsigned char *bf, int blkType) { int n; fseek(fs, fsStart * SSIZE + bno * BSIZE, SEEK_SET); n = fread(bf, 1, BSIZE, fs); if (n != BSIZE) { printf("read error: %ld\n", bno); exit(1); } switch (blkType) { case TYPE_COPY: /* nothing to do here */ break; case TYPE_INODE: inodeFromEcoToX86(bf); break; case TYPE_FREE: freeFromEcoToX86(bf); break; case TYPE_SUPER: superFromEcoToX86(bf); break; case TYPE_INDIRECT: indirectFromEcoToX86(bf); break; case TYPE_DIRECTORY: directoryFromEcoToX86(bf); break; default: error("illegal block type %d in rdfs()", blkType); break; } } void wtfs(EOS32_daddr_t bno, unsigned char *bf, int blkType) { int n; switch (blkType) { case TYPE_COPY: /* nothing to do here */ break; case TYPE_INODE: inodeFromX86ToEco(bf); break; case TYPE_FREE: freeFromX86ToEco(bf); break; case TYPE_SUPER: superFromX86ToEco(bf); break; case TYPE_INDIRECT: indirectFromX86ToEco(bf); break; case TYPE_DIRECTORY: directoryFromX86ToEco(bf); break; default: error("illegal block type %d in wtfs()", blkType); break; } fseek(fs, fsStart * SSIZE + bno * BSIZE, SEEK_SET); n = fwrite(bf, 1, BSIZE, fs); if(n != BSIZE) { printf("write error: %ld\n", bno); exit(1); } switch (blkType) { case TYPE_COPY: /* nothing to do here */ break; case TYPE_INODE: inodeFromEcoToX86(bf); break; case TYPE_FREE: freeFromEcoToX86(bf); break; case TYPE_SUPER: superFromEcoToX86(bf); break; case TYPE_INDIRECT: indirectFromEcoToX86(bf); break; case TYPE_DIRECTORY: directoryFromEcoToX86(bf); break; default: error("illegal block type %d in wtfs()", blkType); break; } } /**************************************************************/ char *charp; FILE *fin; char string[100]; char getChar(void) { int c; if (charp != NULL) { /* take character from string */ c = *charp; if (c != 0) { charp++; } } else { /* take character from prototype file */ c = getc(fin); if (c == EOF) { c = 0; } } return c; } void getStr(void) { char c; int i; while (1) { c = getChar(); if (c == ' ' || c == '\t' || c == '\n') { continue; } if (c == '\0') { error("unexpected EOF in prototype file"); } if (c == '#') { do { c = getChar(); if (c == '\0') { error("unexpected EOF in prototype file"); } } while (c != '\n'); continue; } break; } i = 0; do { string[i++] = c; c = getChar(); } while (c != ' ' && c != '\t' && c != '\n' && c != '\0'); string[i] = '\0'; } void badMode(char c) { error("%c/%s: bad mode", c, string); } int getMode(char c, char *s, int m0, int m1, int m2, int m3) { if (s[0] == 0) badMode(c); if (c == s[0]) return m0; if (s[1] == 0) badMode(c); if (c == s[1]) return m1; if (s[2] == 0) badMode(c); if (c == s[2]) return m2; if (s[3] == 0) badMode(c); if (c == s[3]) return m3; badMode(c); /* never reached */ return 0; } long getNum(void) { int i, c; long n; getStr(); n = 0; i = 0; for (i = 0; (c = string[i]) != '\0'; i++) { if (c < '0' || c > '9') { error("%s: bad number", string); } n = n * 10 + (c - '0'); } return n; } /**************************************************************/ /* data block handling */ EOS32_daddr_t allocBlock(void) { EOS32_daddr_t bno; Fblk fbuf; int i; if (filsys.s_nfree <= 0) { error("this should never happen (filsys.s_nfree <= 0)"); } bno = filsys.s_free[--filsys.s_nfree]; if (bno == 0) { error("out of free disk blocks"); } if (filsys.s_nfree == 0) { rdfs(bno, (unsigned char *) &fbuf, TYPE_FREE); filsys.s_nfree = fbuf.df_nfree; for (i = 0; i < NICFREE; i++) { filsys.s_free[i] = fbuf.df_free[i]; } } filsys.s_freeblks--; return bno; } void freeBlock(EOS32_daddr_t bno) { Fblk fbuf; int i; if (filsys.s_nfree > NICFREE) { error("this should never happen (filsys.s_nfree > NICFREE)"); } if (filsys.s_nfree == NICFREE) { memset(&fbuf, 0, sizeof(Fblk)); fbuf.df_nfree = NICFREE; for (i = 0; i < NICFREE; i++) { fbuf.df_free[i] = filsys.s_free[i]; } wtfs(bno, (unsigned char *) &fbuf, TYPE_FREE); filsys.s_nfree = 0; } filsys.s_free[filsys.s_nfree++] = bno; if (bno != 0) { /* note: block number 0 does not count as free block */ filsys.s_freeblks++; } } void initFreeList(void) { EOS32_daddr_t bno; freeBlock(0); for (bno = filsys.s_fsize - 1; bno >= 2 + filsys.s_isize; bno--) { freeBlock(bno); } } /**************************************************************/ /* inode handling */ void iput(Inode *ip) { EOS32_daddr_t inodeBlock; Dinode *dp; unsigned char buf[BSIZE]; int i; inodeBlock = itod(ip->i_number); if (inodeBlock >= 2 + filsys.s_isize) { error("too few inodes"); } rdfs(inodeBlock, buf, TYPE_INODE); dp = (Dinode *) buf; dp += itoo(ip->i_number); dp->di_mode = ip->i_mode; dp->di_nlink = ip->i_nlink; dp->di_uid = ip->i_uid; dp->di_gid = ip->i_gid; dp->di_ctime = now; dp->di_mtime = now; dp->di_atime = now; dp->di_size = ip->i_size; for (i = 0; i < NADDR; i++) { dp->di_addr[i] = ip->i_addr[i]; } wtfs(inodeBlock, buf, TYPE_INODE); filsys.s_freeinos--; } void initInodes(void) { int i; EOS32_daddr_t n; unsigned char buf[BSIZE]; Inode in; /* init all inodes to free */ for (i = 0; i < BSIZE; i++) { buf[i] = '\0'; } for (n = 0; n < filsys.s_isize; n++) { wtfs(2 + n, buf, TYPE_INODE); filsys.s_freeinos += NIPB; } /* init inode 0 */ lastIno = 0; in.i_number = lastIno; in.i_mode = IFREG; in.i_nlink = 0; in.i_uid = 0; in.i_gid = 0; in.i_size = 0; for (i = 0; i < NADDR; i++) { in.i_addr[i] = 0; } iput(&in); } void fillFreeInodeList(EOS32_ino_t numInodes) { int index; EOS32_ino_t ino; int i; /* fill the free inode list starting at the upper end */ index = NICINOD; for (ino = lastIno + 1; ino < numInodes && index > 0; ino++) { filsys.s_inode[--index] = ino; } filsys.s_ninode = NICINOD - index; /* if the list is not completely filled, shift entries down */ if (index > 0) { for (i = 0; i < filsys.s_ninode; i++) { filsys.s_inode[i] = filsys.s_inode[index++]; } } } /**************************************************************/ void appendData(Inode *ip, int blkType, unsigned char *src, int size) { EOS32_off_t offset; int index1, index2; EOS32_daddr_t bno; unsigned char buf[BSIZE]; EOS32_daddr_t ibno; EOS32_daddr_t iblk[NINDIR]; EOS32_daddr_t dibno; EOS32_daddr_t diblk[NINDIR]; offset = ip->i_size; if (offset < NDADDR * BSIZE) { /* direct block */ index1 = offset / BSIZE; offset %= BSIZE; if (ip->i_addr[index1] == 0) { bno = allocBlock(); ip->i_addr[index1] = bno; memset(buf, 0, BSIZE); } else { bno = ip->i_addr[index1]; rdfs(bno, buf, blkType); } } else if (offset < (NINDIR + NDADDR) * BSIZE) { /* single indirect block */ offset -= NDADDR * BSIZE; index1 = offset / BSIZE; offset %= BSIZE; if (ip->i_addr[SINGLE_INDIR] == 0) { ibno = allocBlock(); ip->i_addr[SINGLE_INDIR] = ibno; memset(iblk, 0, BSIZE); } else { ibno = ip->i_addr[SINGLE_INDIR]; rdfs(ibno, (unsigned char *) iblk, TYPE_INDIRECT); } if (iblk[index1] == 0) { bno = allocBlock(); iblk[index1] = bno; wtfs(ibno, (unsigned char *) iblk, TYPE_INDIRECT); memset(buf, 0, BSIZE); } else { bno = iblk[index1]; rdfs(bno, buf, blkType); } } else { /* double indirect block */ offset -= (NINDIR + NDADDR) * BSIZE; index1 = offset / BSIZE; offset %= BSIZE; index2 = index1 / NINDIR; index1 %= NINDIR; if (ip->i_addr[DOUBLE_INDIR] == 0) { dibno = allocBlock(); ip->i_addr[DOUBLE_INDIR] = dibno; memset(diblk, 0, BSIZE); } else { dibno = ip->i_addr[DOUBLE_INDIR]; rdfs(dibno, (unsigned char *) diblk, TYPE_INDIRECT); } if (diblk[index2] == 0) { ibno = allocBlock(); diblk[index2] = ibno; wtfs(dibno, (unsigned char *) diblk, TYPE_INDIRECT); memset(iblk, 0, BSIZE); } else { ibno = diblk[index2]; rdfs(ibno, (unsigned char *) iblk, TYPE_INDIRECT); } if (iblk[index1] == 0) { bno = allocBlock(); iblk[index1] = bno; wtfs(ibno, (unsigned char *) iblk, TYPE_INDIRECT); memset(buf, 0, BSIZE); } else { bno = iblk[index1]; rdfs(bno, buf, blkType); } } memcpy(buf + offset, src, size); wtfs(bno, buf, blkType); ip->i_size += size; } void makeDirEntry(Inode *dir, EOS32_ino_t ino, char *name) { Dirent entry; memset(&entry, 0, sizeof(Dirent)); entry.d_ino = ino; strcpy(entry.d_name, name); appendData(dir, TYPE_DIRECTORY, (unsigned char *) &entry, sizeof(Dirent)); } void createFile(Inode *parent) { Inode in; int i; char c; FILE *f; unsigned char buf[BSIZE]; /* get mode, uid and gid */ getStr(); in.i_mode = getMode(string[0], "-bcd", IFREG, IFBLK, IFCHR, IFDIR); in.i_mode |= getMode(string[1], "-u", 0, ISUID, 0, 0); in.i_mode |= getMode(string[2], "-g", 0, ISGID, 0, 0); for (i = 3; i < 6; i++) { c = string[i]; if (c < '0' || c > '7') { error("%c/%s: bad octal mode digit", c, string); } in.i_mode |= (c - '0') << (15 - 3 * i); } in.i_uid = getNum(); in.i_gid = getNum(); /* general initialization prior to switching on format */ lastIno++; in.i_number = lastIno; in.i_nlink = 1; in.i_size = 0; for (i = 0; i < NADDR; i++) { in.i_addr[i] = 0; } if (parent == NULL) { parent = ∈ in.i_nlink--; } /* now switch on format */ switch (in.i_mode & IFMT) { case IFREG: /* regular file: contents is a file name */ getStr(); f = fopen(string, "rb"); if (f == NULL) { error("%s: cannot open", string); } while ((i = fread(buf, 1, BSIZE, f)) > 0) { appendData(&in, TYPE_COPY, buf, i); } fclose(f); break; case IFBLK: case IFCHR: /* special file: contents is major/minor device */ in.i_addr[0] = (getNum() & 0xFFFF) << 16; in.i_addr[0] |= (getNum() & 0xFFFF); break; case IFDIR: /* directory: put in extra links, call recursively until name is "$" */ parent->i_nlink++; in.i_nlink++; makeDirEntry(&in, in.i_number, "."); makeDirEntry(&in, parent->i_number, ".."); while (1) { getStr(); if (string[0] == '$' && string[1] == '\0') { break; } makeDirEntry(&in, lastIno + 1, string); createFile(&in); } break; default: error("bad format/mode %o\n", in.i_mode); break; } /* finally write the inode */ iput(&in); } /**************************************************************/ void showSizes(void) { printf("BSIZE = %d\n", BSIZE); printf("NICINOD = %d\n", NICINOD); printf("NICFREE = %d\n", NICFREE); printf("NADDR = %d\n", NADDR); printf("NDADDR = %d\n", NDADDR); printf("DIRSIZ = %d\n", DIRSIZ); printf("NIPB = %d\n", NIPB); printf("NDIRENT = %d\n", NDIRENT); printf("NINDIR = %d\n", NINDIR); printf("sizeof(Filsys) = %d\n", sizeof(Filsys)); printf("sizeof(Dinode) = %d\n", sizeof(Dinode)); printf("sizeof(Dirent) = %d\n", sizeof(Dirent)); printf("sizeof(Fblk) = %d\n", sizeof(Fblk)); } int main(int argc, char *argv[]) { char *fsnam; char *proto; char protoBuf[20]; unsigned long fsSize; int part; char *endptr; unsigned char partTable[SSIZE]; unsigned char *ptptr; unsigned long partType; EOS32_daddr_t maxBlocks; EOS32_daddr_t numBlocks; EOS32_ino_t numInodes; int i; char c; FILE *bootblk; long bootblkSize; unsigned char buf[BSIZE]; if (argc == 2 && strcmp(argv[1], "--sizes") == 0) { showSizes(); exit(0); } if (argc != 3 && argc != 4) { printf("Usage: %s <disk> <partition or '*'> [<prototype or size>]\n", argv[0]); printf(" or: %s --sizes\n", argv[0]); exit(1); } time(&now); fsnam = argv[1]; fs = fopen(fsnam, "r+b"); if (fs == NULL) { error("cannot open disk image '%s'", fsnam); } if (strcmp(argv[2], "*") == 0) { /* whole disk contains one single file system */ fsStart = 0; fseek(fs, 0, SEEK_END); fsSize = ftell(fs) / SSIZE; } else { /* argv[2] is partition number of file system */ part = strtoul(argv[2], &endptr, 10); if (*endptr != '\0' || part < 0 || part > 15) { error("illegal partition number '%s'", argv[2]); } fseek(fs, 1 * SSIZE, SEEK_SET); if (fread(partTable, 1, SSIZE, fs) != SSIZE) { error("cannot read partition table of disk '%s'", fsnam); } ptptr = partTable + part * 32; partType = read4FromEco(ptptr + 0); if ((partType & 0x7FFFFFFF) != 0x00000058) { error("partition %d of disk '%s' does not contain an EOS32 file system", part, fsnam); } fsStart = read4FromEco(ptptr + 4); fsSize = read4FromEco(ptptr + 8); } printf("File system space is %lu (0x%lX) sectors of %d bytes each.\n", fsSize, fsSize, SSIZE); if (fsSize % SPB != 0) { printf("File system space is not a multiple of block size.\n"); } maxBlocks = fsSize / SPB; printf("This equals %lu (0x%lX) blocks of %d bytes each.\n", maxBlocks, maxBlocks, BSIZE); if (argc == 4) { proto = argv[3]; } else { proto = protoBuf; sprintf(protoBuf, "%lu", maxBlocks); } /* initialize super block and possibly write boot block */ filsys.s_magic = SUPER_MAGIC; fin = fopen(proto, "rt"); if (fin == NULL) { /* cannot open prototype file, perhaps size was specified */ charp = "d--777 0 0 $ "; numBlocks = 0; for (i = 0; (c = proto[i]) != '\0'; i++) { if (c < '0' || c > '9') { /* neither valid prototype file nor valid size */ error("cannot open prototype '%s'", proto); } numBlocks = numBlocks * 10 + (c - '0'); } numInodes = (numBlocks * BSIZE) / AFS; } else { /* prototype file opened */ charp = NULL; getStr(); if (strcmp(string, "-noboot-") == 0) { /* boot block not wanted */ } else { /* string holds the name of the boot block file */ bootblk = fopen(string, "rb"); if (bootblk == NULL) { error("cannot open boot block file '%s'", string); } fseek(bootblk, 0, SEEK_END); bootblkSize = ftell(bootblk); fseek(bootblk, 0, SEEK_SET); if (bootblkSize > BSIZE) { error("boot block file '%s' is bigger than a block", string); } for (i = 0; i < BSIZE; i++) { buf[i] = '\0'; } if (fread(buf, 1, bootblkSize, bootblk) != bootblkSize) { error("cannot read boot block file '%s'", string); } wtfs(0, buf, TYPE_COPY); fclose(bootblk); } numBlocks = getNum(); numInodes = getNum(); } if (numBlocks > maxBlocks) { error("file system exceeds available space"); } if (numBlocks < maxBlocks) { printf("File system does not fully utilize available space.\n"); } filsys.s_fsize = numBlocks; filsys.s_isize = (numInodes + NIPB - 1) / NIPB; numInodes = filsys.s_isize * NIPB; if (2 + filsys.s_isize >= filsys.s_fsize) { error("bad block ratio (total/inode = %lu/%lu)", filsys.s_fsize, filsys.s_isize); } printf("File system size = %ld blocks\n", filsys.s_fsize); printf("Number of inodes = %ld inodes\n", numInodes); filsys.s_freeblks = 0; filsys.s_freeinos = 0; filsys.s_ninode = 0; for (i = 0; i < NICINOD; i++) { filsys.s_inode[i] = 0; } filsys.s_nfree = 0; for (i = 0; i < NICFREE; i++) { filsys.s_free[i] = 0; } filsys.s_time = now; filsys.s_flock = 0; filsys.s_ilock = 0; filsys.s_fmod = 0; filsys.s_ronly = 0; /* init inodes */ initInodes(); /* init free list */ initFreeList(); /* create files */ createFile(NULL); /* fill free inode list in super block */ /* note: this isn't strictly necessary, but cuts down file creation time within the newly created partition or disk */ fillFreeInodeList(numInodes); /* finally write super block and return */ wtfs(1, (unsigned char *) &filsys, TYPE_SUPER); return 0; }
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