diff options
Diffstat (limited to 'usr.bin/ar/replace.c')
| -rw-r--r-- | usr.bin/ar/replace.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/usr.bin/ar/replace.c b/usr.bin/ar/replace.c new file mode 100644 index 0000000..cc12781 --- /dev/null +++ b/usr.bin/ar/replace.c @@ -0,0 +1,176 @@ +/*- + * Copyright (c) 1990, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Hugh Smith at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)replace.c 8.3 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/stat.h> + +#include <ar.h> +#include <dirent.h> +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include "archive.h" +#include "extern.h" + +/* + * replace -- + * Replace or add named members to archive. Entries already in the + * archive are swapped in place. Others are added before or after + * the key entry, based on the a, b and i options. If the u option + * is specified, modification dates select for replacement. + */ +int +replace(argv) + char **argv; +{ + char *file; + int afd, curfd, errflg, exists, mods, sfd, tfd1, tfd2; + struct stat sb; + CF cf; + off_t size, tsize; + + errflg = 0; + /* + * If doesn't exist, simply append to the archive. There's + * a race here, but it's pretty short, and not worth fixing. + */ + exists = !stat(archive, &sb); + afd = open_archive(O_CREAT|O_RDWR); + + if (!exists) { + tfd1 = -1; + tfd2 = tmp(); + goto append; + } + + tfd1 = tmp(); /* Files before key file. */ + tfd2 = tmp(); /* Files after key file. */ + + /* + * Break archive into two parts -- entries before and after the key + * entry. If positioning before the key, place the key at the + * beginning of the after key entries and if positioning after the + * key, place the key at the end of the before key entries. Put it + * all back together at the end. + */ + mods = (options & (AR_A|AR_B)); + for (curfd = tfd1; get_arobj(afd);) { + if (*argv && (file = files(argv))) { + if ((sfd = open(file, O_RDONLY)) < 0) { + errflg = 1; + warn("%s", file); + goto useold; + } + (void)fstat(sfd, &sb); + if (options & AR_U && sb.st_mtime <= chdr.date) + goto useold; + + if (options & AR_V) + (void)printf("r - %s\n", file); + + /* Read from disk, write to an archive; pad on write */ + SETCF(sfd, file, curfd, tname, WPAD); + put_arobj(&cf, &sb); + (void)close(sfd); + skip_arobj(afd); + continue; + } + + if (mods && compare(posname)) { + mods = 0; + if (options & AR_B) + curfd = tfd2; + /* Read and write to an archive; pad on both. */ + SETCF(afd, archive, curfd, tname, RPAD|WPAD); + put_arobj(&cf, (struct stat *)NULL); + if (options & AR_A) + curfd = tfd2; + } else { + /* Read and write to an archive; pad on both. */ +useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD); + put_arobj(&cf, (struct stat *)NULL); + } + } + + if (mods) { + warnx("%s: archive member not found", posarg); + close_archive(afd); + return (1); + } + + /* Append any left-over arguments to the end of the after file. */ +append: while (file = *argv++) { + if (options & AR_V) + (void)printf("a - %s\n", file); + if ((sfd = open(file, O_RDONLY)) < 0) { + errflg = 1; + warn("%s", file); + continue; + } + (void)fstat(sfd, &sb); + /* Read from disk, write to an archive; pad on write. */ + SETCF(sfd, file, + options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD); + put_arobj(&cf, &sb); + (void)close(sfd); + } + + (void)lseek(afd, (off_t)SARMAG, SEEK_SET); + + SETCF(tfd1, tname, afd, archive, NOPAD); + if (tfd1 != -1) { + tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR); + (void)lseek(tfd1, (off_t)0, SEEK_SET); + copy_ar(&cf, size); + } else + tsize = 0; + + tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR); + (void)lseek(tfd2, (off_t)0, SEEK_SET); + cf.rfd = tfd2; + copy_ar(&cf, size); + + (void)ftruncate(afd, tsize + SARMAG); + close_archive(afd); + return (errflg); +} |
