2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Hugh Smith at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
39 static char sccsid[] = "@(#)build.c 8.1 (Berkeley) 6/6/93";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/types.h>
49 #include <arpa/inet.h>
64 typedef struct _rlib {
65 struct _rlib *next; /* next structure */
66 off_t pos; /* offset of defining archive file */
67 char *sym; /* symbol */
68 int symlen; /* strlen(sym) */
74 long symcnt; /* symbol count */
75 long tsymlen; /* total string length */
77 static void rexec(int, int);
78 static void symobj(void);
80 static char tname[] = "temporary file"; /* temporary file "name" */
89 afd = open_archive(O_RDWR);
90 fp = fdopen(afd, "r+");
93 SETCF(afd, archive, tfd, tname, RPAD|WPAD);
95 /* Read through the archive, creating list of symbols. */
98 while(get_arobj(afd)) {
99 if (!strcmp(chdr.name, RANLIBMAG)) {
104 put_arobj(&cf, (struct stat *)NULL);
108 /* Create the symbol table. */
111 /* Copy the saved objects into the archive. */
112 size = lseek(tfd, (off_t)0, SEEK_CUR);
113 (void)lseek(tfd, (off_t)0, SEEK_SET);
114 SETCF(tfd, tname, afd, archive, WPAD);
116 (void)ftruncate(afd, lseek(afd, (off_t)0, SEEK_CUR));
127 * Read the exec structure; ignore any files that don't look
131 rexec(int rfd, int wfd)
136 char *strtab = 0, *sym;
142 /* Get current offsets for original and tmp files. */
143 r_off = lseek(rfd, (off_t)0, SEEK_CUR);
144 w_off = lseek(wfd, (off_t)0, SEEK_CUR);
146 /* Read in exec structure. */
147 nr = read(rfd, &ebuf, sizeof(struct exec));
148 if (nr != sizeof(struct exec))
151 /* Check magic number and symbol count. */
152 if (N_BADMAG(ebuf) || ebuf.a_syms == 0)
155 /* Seek to string table. */
156 if (lseek(rfd, r_off + N_STROFF(ebuf), SEEK_SET) == (off_t)-1)
159 /* Read in size of the string table. */
160 nr = read(rfd, &strsize, sizeof(strsize));
161 if (nr != sizeof(strsize))
164 /* Read in the string table. */
165 strsize -= sizeof(strsize);
166 if ((strtab = malloc(strsize)) == NULL)
168 nr = read(rfd, strtab, strsize);
175 /* Seek to symbol table. */
176 if (fseek(fp, (long)r_off + N_SYMOFF(ebuf), SEEK_SET))
179 /* For each symbol read the nlist entry and save it as necessary. */
180 nsyms = ebuf.a_syms / sizeof(struct nlist);
182 if (!fread(&nl, sizeof(struct nlist), 1, fp)) {
188 /* Ignore if no name or local. */
189 if (!nl.n_un.n_strx || !(nl.n_type & N_EXT))
193 * If the symbol is an undefined external and the n_value
194 * field is non-zero, keep it.
196 if ((nl.n_type & N_TYPE) == N_UNDF && !nl.n_value)
199 /* First four bytes are the table size. */
200 sym = strtab + nl.n_un.n_strx - sizeof(long);
201 symlen = strlen(sym) + 1;
203 if ((rp = malloc(sizeof(RLIB))) == NULL)
205 if ((rp->sym = malloc(symlen)) == NULL)
207 bcopy(sym, rp->sym, symlen);
211 /* Build in forward order for "ar -m" command. */
220 bad1: (void)lseek(rfd, r_off, SEEK_SET);
225 * Write the symbol table into the archive, computing offsets as
235 char hb[sizeof(struct ar_hdr) + 1], pad;
237 /* Rewind the archive, leaving the magic number. */
238 if (fseek(fp, (long)SARMAG, SEEK_SET))
241 /* Size of the ranlib archive file, pad if necessary. */
242 ransize = sizeof(long) +
243 symcnt * sizeof(struct ranlib) + sizeof(long) + tsymlen;
250 /* Put out the ranlib archive file header. */
251 #define DEFMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
252 (void)sprintf(hb, HDR2, RANLIBMAG, 0L, getuid(), getgid(),
253 DEFMODE & ~umask(0), ransize, ARFMAG);
254 if (!fwrite(hb, sizeof(struct ar_hdr), 1, fp))
257 /* First long is the size of the ranlib structure section. */
258 size = symcnt * sizeof(struct ranlib);
259 if (!fwrite(&size, sizeof(size), 1, fp))
262 /* Offset of the first archive file. */
263 size = SARMAG + sizeof(struct ar_hdr) + ransize;
266 * Write out the ranlib structures. The offset into the string
267 * table is cumulative, the offset into the archive is the value
268 * set in rexec() plus the offset to the first archive file.
270 for (rp = rhead, stroff = 0; rp; rp = rp->next) {
271 rn.ran_un.ran_strx = stroff;
272 stroff += rp->symlen;
273 rn.ran_off = size + rp->pos;
274 if (!fwrite(&rn, sizeof(struct ranlib), 1, fp))
278 /* Second long is the size of the string table. */
279 if (!fwrite(&tsymlen, sizeof(tsymlen), 1, fp))
282 /* Write out the string table. */
283 for (rp = rhead; rp; rp = rpnext) {
284 if (!fwrite(rp->sym, rp->symlen, 1, fp))
292 if (pad && !fwrite(&pad, sizeof(pad), 1, fp))