474 lines
11 KiB
C
474 lines
11 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Hugh Smith at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef CROSS
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# include <stdint.h>
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# include <sys/types.h>
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# include <sys/select.h>
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# include <sys/stat.h>
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# include <sys/time.h>
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# include <time.h>
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# include <sys/fcntl.h>
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# include <sys/signal.h>
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# include <stdio.h>
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# include <string.h>
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# include <stdlib.h>
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# include <unistd.h>
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# include <errno.h>
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# define _PATH_RANTMP "/tmp/ranlib.XXXXXX"
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#else
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# include <sys/types.h>
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# include <sys/dir.h>
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# include <sys/file.h>
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# include <sys/stat.h>
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# include <sys/param.h>
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# include <stdio.h>
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# include <errno.h>
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# include <stdlib.h>
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# include <string.h>
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# include <strings.h>
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# include <fcntl.h>
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# include <unistd.h>
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# include <signal.h>
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# include <time.h>
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# include <paths.h>
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#endif
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#include <ar.h>
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#include <ranlib.h>
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#include <a.out.h>
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#ifdef CROSS
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# include "../ar/archive.h"
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#else
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# include "archive.h"
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#endif
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u_int options; /* UNUSED -- keep open_archive happy */
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CHDR chdr; /* converted header */
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char *archive; /* archive name */
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char *tname = "temporary file"; /* temporary file "name" */
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typedef struct _rlib {
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struct _rlib *next; /* next structure */
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off_t pos; /* offset of defining archive file */
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char *sym; /* symbol */
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int symlen; /* strlen(sym) */
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} RLIB;
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RLIB *rhead, **pnext;
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FILE *fp;
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long symcnt; /* symbol count */
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long tsymlen; /* total string length */
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int verbose;
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void error(name)
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char *name;
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{
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(void)fprintf(stderr, "ranlib: %s: %s\n", name, strerror(errno));
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exit(1);
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}
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void *emalloc(len)
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int len;
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{
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char *p;
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p = malloc((u_int)len);
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if (! p)
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error(archive);
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return((void *)p);
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}
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int sgets(buf, n, fp)
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char *buf;
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int n;
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register FILE *fp;
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{
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register int i, c;
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n--; /* room for null */
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for (i = 0; i < n; i++) {
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c = getc(fp);
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if (c == EOF || c == 0)
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break;
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*buf++ = c;
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}
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*buf = '\0';
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return(i + 1);
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}
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unsigned int fgetword (f)
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register FILE *f;
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{
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register unsigned int h;
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h = getc (f);
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h |= getc (f) << 8;
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h |= getc (f) << 16;
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h |= getc (f) << 24;
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return h;
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}
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/*
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* Read a symbol table entry.
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* Return a number of bytes read, 0 on end of table or -1 on EOF.
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* Format of symbol record:
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* 1 byte: length of name in bytes
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* 1 byte: type of symbol (N_UNDF, N_ABS, N_TEXT, etc)
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* 4 bytes: value
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* N bytes: name
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*/
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int fgetsym (fi, name, value, type)
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register FILE *fi;
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register char *name;
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unsigned *value;
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unsigned short *type;
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{
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register int len;
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unsigned nbytes;
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len = getc (fi);
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if (len < 0) {
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return -1;
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}
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if (len == 0) {
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return 0;
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}
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*type = getc (fi);
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*value = fgetword (fi);
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nbytes = len + 6;
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if (name) {
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while (len-- > 0)
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*name++ = getc (fi);
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*name = '\0';
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} else
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fseek (fi, len, SEEK_CUR);
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return nbytes;
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}
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/*
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* Read the exec structure; ignore any files that don't look exactly right.
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*/
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void rexec(rfd, wfd)
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int rfd;
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int wfd;
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{
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register RLIB *rp;
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long nsyms;
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register int nr, symlen;
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struct exec ebuf;
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off_t r_off, w_off;
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/* Get current offsets for original and tmp files. */
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r_off = lseek(rfd, (off_t)0, SEEK_CUR);
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w_off = lseek(wfd, (off_t)0, SEEK_CUR);
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/* Read in exec structure. */
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nr = read(rfd, (char *)&ebuf, sizeof(struct exec));
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if (nr != sizeof(struct exec))
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goto bad1;
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/* Check magic number and symbol count. */
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if (N_BADMAG(ebuf) || ebuf.a_syms == 0)
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goto bad1;
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/* Seek to symbol table. */
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if (fseek(fp, (off_t)N_SYMOFF(ebuf) + r_off, SEEK_SET) == (off_t)-1)
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goto bad1;
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/* For each symbol read the nlist entry and save it as necessary. */
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nsyms = ebuf.a_syms;
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while (nsyms > 4) {
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unsigned value;
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unsigned short type;
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char name [256];
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int c = fgetsym(fp, name, &value, &type);
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if (c < 0) {
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if (feof(fp)) {
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/* Bad file format. */
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errno = EINVAL;
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}
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error(archive);
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}
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nsyms -= c;
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symlen = c - 6;
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/* Ignore if no name or local. */
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if (symlen <= 0 || ! (type & N_EXT))
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continue;
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/*
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* If the symbol is an undefined external and the n_value
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* field is non-zero, keep it.
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*/
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if ((type & N_TYPE) == N_UNDF && ! value)
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continue;
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rp = (RLIB *)emalloc(sizeof(RLIB));
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rp->next = NULL;
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rp->pos = w_off;
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rp->symlen = symlen;
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rp->sym = (char*) emalloc(symlen + 1);
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bcopy(name, rp->sym, symlen + 1);
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tsymlen += symlen;
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/* Build in forward order for "ar -m" command. */
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*pnext = rp;
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pnext = &rp->next;
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++symcnt;
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}
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bad1: (void)lseek(rfd, (off_t)r_off, SEEK_SET);
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}
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/*
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* symobj --
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* Write the symbol table into the archive, computing offsets as
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* writing.
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*/
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void symobj()
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{
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register RLIB *rp;
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char hb[sizeof(struct ar_hdr) + 1];
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long ransize, baseoff;
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/* Rewind the archive, leaving the magic number. */
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if (fseek(fp, (off_t)SARMAG, SEEK_SET) == (off_t)-1)
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error(archive);
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/* Compute the size of rantab. */
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ransize = 0;
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for (rp = rhead; rp; rp = rp->next) {
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ransize += rp->symlen + 5;
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}
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ransize += 4 - (ransize & 3);
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/* Put out the ranlib archive file header. */
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(void)sprintf(hb, HDR2, RANLIBMAG, 0L, getuid(), getgid(),
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0666 & ~umask(0), ransize, ARFMAG);
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if (! fwrite(hb, sizeof(struct ar_hdr), 1, fp))
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error(tname);
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/* Offset of the first archive file. */
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baseoff = SARMAG + sizeof(struct ar_hdr) + ransize;
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/*
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* Write out the ranlib structures. The offset into the archive
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* is the base value plus the offset to the first archive file.
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*/
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for (rp = rhead; rp; rp = rp->next) {
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/* Write struct ranlib to file.
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* 1 byte - length of name.
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* 4 bytes - seek in archive.
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* 'len' bytes - symbol name. */
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unsigned offset = baseoff + rp->pos;
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fputc (rp->symlen, fp);
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if (! fwrite((char *)&offset, 4, 1, fp))
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error(archive);
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if (! fwrite(rp->sym, rp->symlen, 1, fp))
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error(tname);
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if (verbose)
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fprintf (stderr, "%8u %s\n", offset, rp->sym);
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ransize -= rp->symlen + 5;
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}
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/* Align to word boundary. */
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while (ransize-- > 0)
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fputc (0, fp);
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(void)fflush(fp);
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}
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void settime(afd)
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int afd;
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{
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struct ar_hdr *hdr;
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off_t size;
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char buf[50];
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size = SARMAG + sizeof(hdr->ar_name);
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if (lseek(afd, size, SEEK_SET) == (off_t)-1)
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error(archive);
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(void)sprintf(buf, "%-12ld", time((time_t *)NULL) + RANLIBSKEW);
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if (write(afd, buf, sizeof(hdr->ar_date)) != sizeof(hdr->ar_date))
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error(archive);
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}
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int tmp()
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{
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#ifndef CROSS
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long set, oset;
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#endif
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int fd;
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char path[MAXPATHLEN];
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bcopy(_PATH_RANTMP, path, sizeof(_PATH_RANTMP));
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#ifndef CROSS
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set = sigmask(SIGHUP) | sigmask(SIGINT) |
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sigmask(SIGQUIT) | sigmask(SIGTERM);
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oset = sigsetmask(set);
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#endif
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fd = mkstemp(path);
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if (fd < 0)
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error(tname);
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(void)unlink(path);
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#ifndef CROSS
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(void)sigsetmask(oset);
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#endif
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return(fd);
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}
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int build()
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{
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CF cf;
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int afd, tfd;
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off_t size;
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afd = open_archive(O_RDWR);
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fp = fdopen(afd, "r+");
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tfd = tmp();
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SETCF(afd, archive, tfd, tname, RPAD|WPAD);
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/* Read through the archive, creating list of symbols. */
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pnext = &rhead;
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symcnt = tsymlen = 0;
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while(get_arobj(afd)) {
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if (strcmp(chdr.name, RANLIBMAG) == 0) {
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skip_arobj(afd);
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continue;
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}
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rexec(afd, tfd);
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put_arobj(&cf, (struct stat *)NULL);
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}
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*pnext = NULL;
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/* Create the symbol table. */
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symobj();
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/* Copy the saved objects into the archive. */
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size = lseek(tfd, (off_t)0, SEEK_CUR);
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(void)lseek(tfd, (off_t)0, SEEK_SET);
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SETCF(tfd, tname, afd, archive, RPAD|WPAD);
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copy_ar(&cf, size);
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if (ftruncate(afd, lseek(afd, (off_t)0, SEEK_CUR)) < 0)
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/* ignore */;
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(void)close(tfd);
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/* Set the time. */
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settime(afd);
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close_archive(afd);
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return(0);
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}
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int touch()
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{
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int afd;
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afd = open_archive(O_RDWR);
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if (!get_arobj(afd) ||
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strncmp(RANLIBMAG, chdr.name, sizeof(RANLIBMAG) - 1)) {
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(void)fprintf(stderr,
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"ranlib: %s: no symbol table.\n", archive);
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return(1);
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}
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settime(afd);
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return(0);
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}
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void usage()
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{
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fprintf(stderr, "Usage:\n");
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fprintf(stderr, " ranlib [-t] file...\n");
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fprintf(stderr, "Options:\n");
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fprintf(stderr, " -t Update the timestamp of the symbol map\n");
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fprintf(stderr, " -v Verbose: print the resulting symbol map\n");
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exit(1);
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}
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int main(argc, argv)
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int argc;
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char **argv;
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{
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int ch, eval, tflag;
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tflag = 0;
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while ((ch = getopt(argc, argv, "tv")) != EOF)
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switch(ch) {
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case 't':
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tflag = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'h':
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (! *argv)
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usage();
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for (eval = 0; (archive = *argv++);)
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eval |= tflag ? touch() : build();
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return eval;
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}
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/*
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* For archive.c.
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*/
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char *rname(path)
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char *path;
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{
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register char *ind;
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ind = rindex(path, '/');
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if (! ind)
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return path;
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return ind + 1;
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}
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void badfmt()
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{
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errno = EINVAL;
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error(archive);
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}
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