Annotation of src/usr.bin/ranlib/build.c, Revision 1.8
1.8 ! mpech 1: /* $OpenBSD: build.c,v 1.7 1999/09/21 13:15:43 espie Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1990 The Regents of the University of California.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Hugh Smith at The University of Guelph.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: #ifndef lint
40: /*static char sccsid[] = "from: @(#)build.c 5.3 (Berkeley) 3/12/91";*/
1.8 ! mpech 41: static char rcsid[] = "$OpenBSD: build.c,v 1.7 1999/09/21 13:15:43 espie Exp $";
1.1 deraadt 42: #endif /* not lint */
43:
44: #include <sys/types.h>
45: #include <sys/stat.h>
46: #include <errno.h>
47: #include <fcntl.h>
48: #include <a.out.h>
49: #include <dirent.h>
50: #include <unistd.h>
51: #include <ar.h>
1.5 deraadt 52: #include <limits.h>
1.1 deraadt 53: #include <ranlib.h>
54: #include <stdio.h>
1.7 espie 55: #include <stdlib.h>
1.1 deraadt 56: #include <string.h>
57: #include <archive.h>
1.7 espie 58: #include <err.h>
1.6 espie 59: #include "byte.c"
1.7 espie 60: #include "extern.h"
1.6 espie 61:
1.1 deraadt 62:
63: extern CHDR chdr; /* converted header */
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: static FILE *fp;
74: static long symcnt; /* symbol count */
75: static long tsymlen; /* total string length */
76:
1.6 espie 77: static int rexec();
78: static void symobj();
1.1 deraadt 79:
1.7 espie 80: int
1.1 deraadt 81: build()
82: {
83: CF cf;
84: int afd, tfd;
1.6 espie 85: int current_mid;
1.1 deraadt 86: off_t size;
87:
1.7 espie 88: current_mid = -1;
1.1 deraadt 89: afd = open_archive(O_RDWR);
90: fp = fdopen(afd, "r+");
91: tfd = tmp();
92:
93: SETCF(afd, archive, tfd, tname, RPAD|WPAD);
94:
95: /* Read through the archive, creating list of symbols. */
96: symcnt = tsymlen = 0;
97: pnext = &rhead;
98: while(get_arobj(afd)) {
1.6 espie 99: int new_mid;
100:
1.1 deraadt 101: if (!strcmp(chdr.name, RANLIBMAG)) {
102: skip_arobj(afd);
103: continue;
104: }
1.6 espie 105: new_mid = rexec(afd, tfd);
1.7 espie 106: if (new_mid != -1) {
107: if (current_mid == -1)
108: current_mid = new_mid;
109: else if (new_mid != current_mid)
110: errx(1, "Mixed object format archive: %d / %d",
111: new_mid, current_mid);
112: }
1.1 deraadt 113: put_arobj(&cf, (struct stat *)NULL);
114: }
115: *pnext = NULL;
116:
1.6 espie 117: /* Create the symbol table. Endianess the same as last mid seen */
118: symobj(current_mid);
1.1 deraadt 119:
120: /* Copy the saved objects into the archive. */
121: size = lseek(tfd, (off_t)0, SEEK_CUR);
122: (void)lseek(tfd, (off_t)0, SEEK_SET);
123: SETCF(tfd, tname, afd, archive, NOPAD);
124: copy_ar(&cf, size);
125: (void)ftruncate(afd, lseek(afd, (off_t)0, SEEK_CUR));
126: (void)close(tfd);
127:
128: /* Set the time. */
129: settime(afd);
130: close_archive(afd);
131: return(0);
132: }
133:
134: /*
135: * rexec
136: * Read the exec structure; ignore any files that don't look
1.6 espie 137: * exactly right. Return MID.
1.7 espie 138: * return -1 for files that don't look right.
139: * XXX it's hard to be sure when to ignore files, and when to error
140: * out.
1.1 deraadt 141: */
1.6 espie 142: static int
1.1 deraadt 143: rexec(rfd, wfd)
1.8 ! mpech 144: int rfd;
1.1 deraadt 145: int wfd;
146: {
1.8 ! mpech 147: RLIB *rp;
! 148: long nsyms;
! 149: int nr, symlen;
! 150: char *strtab = 0;
1.7 espie 151: char *sym;
1.1 deraadt 152: struct exec ebuf;
153: struct nlist nl;
154: off_t r_off, w_off;
155: long strsize;
1.7 espie 156: int result = -1;
1.1 deraadt 157:
158: /* Get current offsets for original and tmp files. */
159: r_off = lseek(rfd, (off_t)0, SEEK_CUR);
160: w_off = lseek(wfd, (off_t)0, SEEK_CUR);
161:
162: /* Read in exec structure. */
163: nr = read(rfd, (char *)&ebuf, sizeof(struct exec));
164: if (nr != sizeof(struct exec))
1.7 espie 165: goto bad;
1.1 deraadt 166:
167: /* Check magic number and symbol count. */
1.6 espie 168: if (BAD_OBJECT(ebuf) || ebuf.a_syms == 0)
1.7 espie 169: goto bad;
1.6 espie 170: fix_header_order(&ebuf);
1.1 deraadt 171:
172: /* Seek to string table. */
1.7 espie 173: if (lseek(rfd, N_STROFF(ebuf) + r_off, SEEK_SET) == (off_t)-1) {
174: if (errno == EINVAL)
175: goto bad;
176: else
177: error(archive);
178: }
1.1 deraadt 179:
180: /* Read in size of the string table. */
181: nr = read(rfd, (char *)&strsize, sizeof(strsize));
182: if (nr != sizeof(strsize))
1.7 espie 183: goto bad;
1.1 deraadt 184:
1.6 espie 185: strsize = fix_long_order(strsize, N_GETMID(ebuf));
1.7 espie 186:
1.1 deraadt 187: /* Read in the string table. */
188: strsize -= sizeof(strsize);
189: strtab = (char *)emalloc(strsize);
190: nr = read(rfd, strtab, strsize);
1.7 espie 191: if (nr != strsize)
192: goto bad;
1.1 deraadt 193:
194: /* Seek to symbol table. */
195: if (fseek(fp, N_SYMOFF(ebuf) + r_off, SEEK_SET) == (off_t)-1)
1.7 espie 196: goto bad;
1.1 deraadt 197:
1.7 espie 198: result = N_GETMID(ebuf);
1.1 deraadt 199: /* For each symbol read the nlist entry and save it as necessary. */
200: nsyms = ebuf.a_syms / sizeof(struct nlist);
201: while (nsyms--) {
202: if (!fread((char *)&nl, sizeof(struct nlist), 1, fp)) {
203: if (feof(fp))
204: badfmt();
205: error(archive);
206: }
1.7 espie 207: fix_nlist_order(&nl, N_GETMID(ebuf));
1.1 deraadt 208:
209: /* Ignore if no name or local. */
210: if (!nl.n_un.n_strx || !(nl.n_type & N_EXT))
211: continue;
212:
213: /*
214: * If the symbol is an undefined external and the n_value
215: * field is non-zero, keep it.
216: */
217: if ((nl.n_type & N_TYPE) == N_UNDF && !nl.n_value)
218: continue;
219:
220: /* First four bytes are the table size. */
221: sym = strtab + nl.n_un.n_strx - sizeof(long);
222: symlen = strlen(sym) + 1;
223:
224: rp = (RLIB *)emalloc(sizeof(RLIB));
225: rp->sym = (char *)emalloc(symlen);
226: bcopy(sym, rp->sym, symlen);
227: rp->symlen = symlen;
228: rp->pos = w_off;
229:
230: /* Build in forward order for "ar -m" command. */
231: *pnext = rp;
232: pnext = &rp->next;
233:
234: ++symcnt;
235: tsymlen += symlen;
236: }
237:
1.7 espie 238: bad: if (nr < 0)
239: error(archive);
240: free(strtab);
241: (void)lseek(rfd, (off_t)r_off, SEEK_SET);
242: return result;
1.1 deraadt 243: }
244:
245: /*
246: * symobj --
247: * Write the symbol table into the archive, computing offsets as
1.6 espie 248: * writing. Use the right format depending on mid.
1.1 deraadt 249: */
250: static void
1.6 espie 251: symobj(mid)
252: int mid;
1.1 deraadt 253: {
1.8 ! mpech 254: RLIB *rp, *rnext;
1.1 deraadt 255: struct ranlib rn;
256: char hb[sizeof(struct ar_hdr) + 1], pad;
257: long ransize, size, stroff;
1.3 deraadt 258: uid_t uid;
259: gid_t gid;
1.1 deraadt 260:
261: /* Rewind the archive, leaving the magic number. */
262: if (fseek(fp, (off_t)SARMAG, SEEK_SET) == (off_t)-1)
263: error(archive);
264:
265: /* Size of the ranlib archive file, pad if necessary. */
266: ransize = sizeof(long) +
267: symcnt * sizeof(struct ranlib) + sizeof(long) + tsymlen;
268: if (ransize & 01) {
269: ++ransize;
270: pad = '\n';
271: } else
272: pad = '\0';
273:
1.3 deraadt 274: uid = getuid();
275: if (uid > USHRT_MAX) {
1.4 deraadt 276: warnx("warning: uid %u truncated to %u", uid, USHRT_MAX);
1.3 deraadt 277: uid = USHRT_MAX;
278: }
279: gid = getgid();
280: if (gid > USHRT_MAX) {
1.4 deraadt 281: warnx("warning: gid %u truncated to %u", gid, USHRT_MAX);
1.3 deraadt 282: gid = USHRT_MAX;
283: }
284:
1.1 deraadt 285: /* Put out the ranlib archive file header. */
286: #define DEFMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
1.3 deraadt 287: (void)sprintf(hb, HDR2, RANLIBMAG, 0L, uid, gid,
1.1 deraadt 288: DEFMODE & ~umask(0), (off_t)ransize, ARFMAG);
289: if (!fwrite(hb, sizeof(struct ar_hdr), 1, fp))
290: error(tname);
291:
292: /* First long is the size of the ranlib structure section. */
1.6 espie 293: size = fix_long_order(symcnt * sizeof(struct ranlib), mid);
1.1 deraadt 294: if (!fwrite((char *)&size, sizeof(size), 1, fp))
295: error(tname);
296:
297: /* Offset of the first archive file. */
298: size = SARMAG + sizeof(struct ar_hdr) + ransize;
299:
300: /*
301: * Write out the ranlib structures. The offset into the string
302: * table is cumulative, the offset into the archive is the value
303: * set in rexec() plus the offset to the first archive file.
304: */
305: for (rp = rhead, stroff = 0; rp; rp = rp->next) {
306: rn.ran_un.ran_strx = stroff;
307: stroff += rp->symlen;
308: rn.ran_off = size + rp->pos;
1.6 espie 309: fix_ranlib_order(&rn, mid);
1.1 deraadt 310: if (!fwrite((char *)&rn, sizeof(struct ranlib), 1, fp))
311: error(archive);
312: }
313:
314: /* Second long is the size of the string table. */
1.6 espie 315:
316: size = fix_long_order(tsymlen, mid);
317: if (!fwrite((char *)&size, sizeof(size), 1, fp))
1.1 deraadt 318: error(tname);
319:
320: /* Write out the string table. */
321: for (rp = rhead; rp; rp = rnext) {
322: if (!fwrite(rp->sym, rp->symlen, 1, fp))
323: error(tname);
324: rnext = rp->next;
325: free(rp);
326: }
327: rhead = NULL;
328:
329: if (pad && !fwrite(&pad, sizeof(pad), 1, fp))
330: error(tname);
331:
332: (void)fflush(fp);
333: }
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