| 1 | /*- |
| 2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Hugh Smith at The University of Guelph. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the University of |
| 19 | * California, Berkeley and its contributors. |
| 20 | * 4. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)build.c 8.1 (Berkeley) 6/6/93 |
| 37 | * $FreeBSD: src/usr.bin/ranlib/build.c,v 1.7 1999/08/28 01:05:01 peter Exp $ |
| 38 | * $DragonFly: src/usr.bin/ranlib/Attic/build.c,v 1.3 2003/11/03 19:31:31 eirikn Exp $ |
| 39 | */ |
| 40 | |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/stat.h> |
| 43 | |
| 44 | #include <a.out.h> |
| 45 | #include <ar.h> |
| 46 | #include <dirent.h> |
| 47 | #include <fcntl.h> |
| 48 | #include <ranlib.h> |
| 49 | #include <stdio.h> |
| 50 | #include <stdlib.h> |
| 51 | #include <string.h> |
| 52 | #include <unistd.h> |
| 53 | |
| 54 | #include "archive.h" |
| 55 | |
| 56 | extern int tmp( void ); |
| 57 | extern void error( char * ); |
| 58 | extern void badfmt( void ); |
| 59 | extern void settime( int ); |
| 60 | |
| 61 | extern CHDR chdr; /* converted header */ |
| 62 | extern char *archive; /* archive name */ |
| 63 | extern char *tname; /* temporary file "name" */ |
| 64 | |
| 65 | typedef struct _rlib { |
| 66 | struct _rlib *next; /* next structure */ |
| 67 | off_t pos; /* offset of defining archive file */ |
| 68 | char *sym; /* symbol */ |
| 69 | int symlen; /* strlen(sym) */ |
| 70 | } RLIB; |
| 71 | RLIB *rhead, **pnext; |
| 72 | |
| 73 | FILE *fp; |
| 74 | |
| 75 | long symcnt; /* symbol count */ |
| 76 | long tsymlen; /* total string length */ |
| 77 | |
| 78 | static void rexec(int, int); |
| 79 | static void symobj(void); |
| 80 | |
| 81 | int |
| 82 | build(void) |
| 83 | { |
| 84 | CF cf; |
| 85 | int afd, tfd; |
| 86 | off_t size; |
| 87 | |
| 88 | afd = open_archive(O_RDWR); |
| 89 | fp = fdopen(afd, "r+"); |
| 90 | tfd = tmp(); |
| 91 | |
| 92 | SETCF(afd, archive, tfd, tname, RPAD|WPAD); |
| 93 | |
| 94 | /* Read through the archive, creating list of symbols. */ |
| 95 | pnext = &rhead; |
| 96 | symcnt = tsymlen = 0; |
| 97 | while(get_arobj(afd)) { |
| 98 | if (!strcmp(chdr.name, RANLIBMAG)) { |
| 99 | skip_arobj(afd); |
| 100 | continue; |
| 101 | } |
| 102 | rexec(afd, tfd); |
| 103 | put_arobj(&cf, (struct stat *)NULL); |
| 104 | } |
| 105 | *pnext = NULL; |
| 106 | |
| 107 | /* Create the symbol table. */ |
| 108 | symobj(); |
| 109 | |
| 110 | /* Copy the saved objects into the archive. */ |
| 111 | size = lseek(tfd, (off_t)0, SEEK_CUR); |
| 112 | (void)lseek(tfd, (off_t)0, SEEK_SET); |
| 113 | SETCF(tfd, tname, afd, archive, WPAD); |
| 114 | copy_ar(&cf, size); |
| 115 | (void)ftruncate(afd, lseek(afd, (off_t)0, SEEK_CUR)); |
| 116 | (void)close(tfd); |
| 117 | |
| 118 | /* Set the time. */ |
| 119 | settime(afd); |
| 120 | close_archive(afd); |
| 121 | return(0); |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * rexec |
| 126 | * Read the exec structure; ignore any files that don't look |
| 127 | * exactly right. |
| 128 | */ |
| 129 | static void |
| 130 | rexec(rfd, wfd) |
| 131 | register int rfd; |
| 132 | int wfd; |
| 133 | { |
| 134 | register RLIB *rp; |
| 135 | register long nsyms; |
| 136 | register int nr, symlen; |
| 137 | register char *strtab = 0, *sym; |
| 138 | struct exec ebuf; |
| 139 | struct nlist nl; |
| 140 | off_t r_off, w_off; |
| 141 | long strsize; |
| 142 | void *emalloc(); |
| 143 | |
| 144 | /* Get current offsets for original and tmp files. */ |
| 145 | r_off = lseek(rfd, (off_t)0, SEEK_CUR); |
| 146 | w_off = lseek(wfd, (off_t)0, SEEK_CUR); |
| 147 | |
| 148 | /* Read in exec structure. */ |
| 149 | nr = read(rfd, &ebuf, sizeof(struct exec)); |
| 150 | if (nr != sizeof(struct exec)) |
| 151 | goto badread; |
| 152 | |
| 153 | /* Check magic number and symbol count. */ |
| 154 | if (N_BADMAG(ebuf) || ebuf.a_syms == 0) |
| 155 | goto bad1; |
| 156 | |
| 157 | /* Seek to string table. */ |
| 158 | if (lseek(rfd, r_off + N_STROFF(ebuf), SEEK_SET) == (off_t)-1) |
| 159 | error(archive); |
| 160 | |
| 161 | /* Read in size of the string table. */ |
| 162 | nr = read(rfd, &strsize, sizeof(strsize)); |
| 163 | if (nr != sizeof(strsize)) |
| 164 | goto badread; |
| 165 | |
| 166 | /* Read in the string table. */ |
| 167 | strsize -= sizeof(strsize); |
| 168 | strtab = emalloc(strsize); |
| 169 | nr = read(rfd, strtab, strsize); |
| 170 | if (nr != strsize) { |
| 171 | badread: if (nr < 0) |
| 172 | error(archive); |
| 173 | goto bad2; |
| 174 | } |
| 175 | |
| 176 | /* Seek to symbol table. */ |
| 177 | if (fseek(fp, (long)r_off + N_SYMOFF(ebuf), SEEK_SET)) |
| 178 | goto bad2; |
| 179 | |
| 180 | /* For each symbol read the nlist entry and save it as necessary. */ |
| 181 | nsyms = ebuf.a_syms / sizeof(struct nlist); |
| 182 | while (nsyms--) { |
| 183 | if (!fread(&nl, sizeof(struct nlist), 1, fp)) { |
| 184 | if (feof(fp)) |
| 185 | badfmt(); |
| 186 | error(archive); |
| 187 | } |
| 188 | |
| 189 | /* Ignore if no name or local. */ |
| 190 | if (!nl.n_un.n_strx || !(nl.n_type & N_EXT)) |
| 191 | continue; |
| 192 | |
| 193 | /* |
| 194 | * If the symbol is an undefined external and the n_value |
| 195 | * field is non-zero, keep it. |
| 196 | */ |
| 197 | if ((nl.n_type & N_TYPE) == N_UNDF && !nl.n_value) |
| 198 | continue; |
| 199 | |
| 200 | /* First four bytes are the table size. */ |
| 201 | sym = strtab + nl.n_un.n_strx - sizeof(long); |
| 202 | symlen = strlen(sym) + 1; |
| 203 | |
| 204 | rp = (RLIB *)emalloc(sizeof(RLIB)); |
| 205 | rp->sym = (char *)emalloc(symlen); |
| 206 | bcopy(sym, rp->sym, symlen); |
| 207 | rp->symlen = symlen; |
| 208 | rp->pos = w_off; |
| 209 | |
| 210 | /* Build in forward order for "ar -m" command. */ |
| 211 | *pnext = rp; |
| 212 | pnext = &rp->next; |
| 213 | |
| 214 | ++symcnt; |
| 215 | tsymlen += symlen; |
| 216 | } |
| 217 | |
| 218 | bad2: free(strtab); |
| 219 | bad1: (void)lseek(rfd, r_off, SEEK_SET); |
| 220 | } |
| 221 | |
| 222 | /* |
| 223 | * symobj -- |
| 224 | * Write the symbol table into the archive, computing offsets as |
| 225 | * writing. |
| 226 | */ |
| 227 | static void |
| 228 | symobj() |
| 229 | { |
| 230 | register RLIB *rp, *rpnext; |
| 231 | struct ranlib rn; |
| 232 | off_t ransize; |
| 233 | long size, stroff; |
| 234 | char hb[sizeof(struct ar_hdr) + 1], pad; |
| 235 | |
| 236 | /* Rewind the archive, leaving the magic number. */ |
| 237 | if (fseek(fp, (long)SARMAG, SEEK_SET)) |
| 238 | error(archive); |
| 239 | |
| 240 | /* Size of the ranlib archive file, pad if necessary. */ |
| 241 | ransize = sizeof(long) + |
| 242 | symcnt * sizeof(struct ranlib) + sizeof(long) + tsymlen; |
| 243 | if (ransize & 01) { |
| 244 | ++ransize; |
| 245 | pad = '\n'; |
| 246 | } else |
| 247 | pad = '\0'; |
| 248 | |
| 249 | /* Put out the ranlib archive file header. */ |
| 250 | #define DEFMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) |
| 251 | (void)sprintf(hb, HDR2, RANLIBMAG, 0L, getuid(), getgid(), |
| 252 | DEFMODE & ~umask(0), ransize, ARFMAG); |
| 253 | if (!fwrite(hb, sizeof(struct ar_hdr), 1, fp)) |
| 254 | error(tname); |
| 255 | |
| 256 | /* First long is the size of the ranlib structure section. */ |
| 257 | size = symcnt * sizeof(struct ranlib); |
| 258 | if (!fwrite(&size, sizeof(size), 1, fp)) |
| 259 | error(tname); |
| 260 | |
| 261 | /* Offset of the first archive file. */ |
| 262 | size = SARMAG + sizeof(struct ar_hdr) + ransize; |
| 263 | |
| 264 | /* |
| 265 | * Write out the ranlib structures. The offset into the string |
| 266 | * table is cumulative, the offset into the archive is the value |
| 267 | * set in rexec() plus the offset to the first archive file. |
| 268 | */ |
| 269 | for (rp = rhead, stroff = 0; rp; rp = rp->next) { |
| 270 | rn.ran_un.ran_strx = stroff; |
| 271 | stroff += rp->symlen; |
| 272 | rn.ran_off = size + rp->pos; |
| 273 | if (!fwrite(&rn, sizeof(struct ranlib), 1, fp)) |
| 274 | error(archive); |
| 275 | } |
| 276 | |
| 277 | /* Second long is the size of the string table. */ |
| 278 | if (!fwrite(&tsymlen, sizeof(tsymlen), 1, fp)) |
| 279 | error(tname); |
| 280 | |
| 281 | /* Write out the string table. */ |
| 282 | for (rp = rhead; rp; rp = rpnext) { |
| 283 | if (!fwrite(rp->sym, rp->symlen, 1, fp)) |
| 284 | error(tname); |
| 285 | rpnext = rp->next; |
| 286 | free(rp->sym); |
| 287 | free(rp); |
| 288 | } |
| 289 | rhead = NULL; |
| 290 | |
| 291 | if (pad && !fwrite(&pad, sizeof(pad), 1, fp)) |
| 292 | error(tname); |
| 293 | |
| 294 | (void)fflush(fp); |
| 295 | } |