/* ar.c - Archive modify and extract. Copyright (C) 1991 Free Software Foundation, Inc. This file is part of GNU Binutils. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Bugs: should use getopt the way tar does (complete w/optional -) and should have long options too. GNU ar used to check file against filesystem in quick_update and replace operations (would check mtime). Doesn't warn when name truncated. No way to specify pos_end. Error messages should be more consistant. */ #include "bfd.h" #include "sysdep.h" #include "ar.h" #include #include #include #define BUFSIZE 8192 /* FIXME: Not great to have these here. Should they be exported or not? */ PROTO(size_t, bfd_read, (void *ptr, size_t size, size_t nitems, bfd * abfd)); PROTO(size_t, bfd_write, (void *ptr, size_t size, size_t nitems, bfd * abfd)); /* PROTO (void, open_inarch, (char *archive_filename)); */ #ifdef __STDC__ static void open_inarch(char *archive_filename); #else static void open_inarch(); #endif /* __STDC__ */ PROTO(void, map_over_members, (void (*function) (), char **files, int count)); PROTO(void, print_contents, (bfd * member)); PROTO(void, extract_file, (bfd * abfd)); PROTO(void, delete_members, (char **files_to_delete)); PROTO(void, do_quick_append, (char *archive_filename, char **files_to_append)); PROTO(void, move_members, (char **files_to_move)); PROTO(void, replace_members, (char **files_to_replace)); PROTO(void, print_descr, (bfd * abfd)); PROTO(void, ranlib_only, (char *archname)); /** Globals and flags */ char *program_name = NULL; bfd bogus_archive; bfd *inarch; /* The input arch we're manipulating */ /* This flag distinguishes between ar and ranlib: 1 means this is 'ranlib'; -1 means this is 'ar'. 0 means if we should use argv[0] to decide. */ extern int is_ranlib; /* Nonzero means don't warn about creating the archive file if necessary. */ int silent_create = 0; /* Nonzero means describe each action performed. */ int verbose = 0; /* Nonzero means preserve dates of members when extracting them. */ int preserve_dates = 0; /* Nonzero means don't replace existing members whose dates are more recent than the corresponding files. */ int newer_only = 0; /* write a __.SYMDEF member into the modified archive. */ boolean write_armap = false; /* Nonzero means don't update __.SYMDEF unless command line explicitly requested it */ int ignore_symdef = 0; /* Nonzero means it's the name of an existing member; position new or moved files with respect to this one. */ char *posname = NULL; /* Sez how to use `posname': pos_before means position before that member. pos_after means position after that member. pos_end means always at end. pos_default means default appropriately. For the latter two, `posname' should also be zero. */ enum pos { pos_default, pos_before, pos_after, pos_end } postype = pos_default; #ifdef GNU960 char *default_target; void gnu960_verify_target(abfd) bfd *abfd; { if ( abfd->format == bfd_unknown ){ bfd_check_format(abfd, bfd_object); /* Don't really care if it's an object -- * just want to get the correct xvec. */ } if ( !BFD_COFF_FILE_P(abfd) ){ fatal( "'%s' not a COFF file -- operation aborted", abfd->filename ); } } #endif boolean operation_alters_arch = false; /* The option parsing should be in its own function. It will be when I have getopt working. */ int main(argc, argv) int argc; char **argv; { char *arg_ptr; char c; enum { none = 0, delete, replace, print_table, print_files, extract, move, quick_append } operation = none; int arg_index; char **files; char *inarch_filename; char *temp; bfd_init(); #ifdef GNU960 check_v960( argc, argv ); default_target = bfd_make_targ_name(BFD_COFF_FORMAT,HOST_BYTE_ORDER_BIG_P); #endif program_name = argv[0]; temp = strrchr(program_name, '/'); if (temp == (char *) NULL) temp = program_name; /* shouldn't happen, but... */ else ++temp; if (is_ranlib > 0 || (is_ranlib == 0 && strcmp(temp, "ranlib") == 0)) { if (argc < 2) fatal("Too few command arguments."); ranlib_only(argv[1]); } if (argc < 3) fatal("Too few command arguments."); arg_ptr = argv[1]; if (*arg_ptr == '-') ++arg_ptr; /* compatibility */ while (c = *arg_ptr++) { switch (c) { case 'd': case 'm': case 'p': case 'q': case 'r': case 't': case 'x': if (operation != none) fatal("two different operation switches specified"); switch (c) { case 'd': operation = delete; operation_alters_arch = true; break; case 'm': operation = move; operation_alters_arch = true; break; case 'p': operation = print_files; break; case 'q': operation = quick_append; operation_alters_arch = true; break; case 'r': operation = replace; operation_alters_arch = true; break; case 't': operation = print_table; break; case 'x': operation = extract; break; } case 'l': break; case 'c': silent_create = 1; break; case 'o': preserve_dates = 1; break; case 's': write_armap = true; break; case 'u': newer_only = 1; break; case 'v': verbose = 1; break; case 'a': postype = pos_after; break; case 'b': postype = pos_before; break; case 'i': postype = pos_before; break; default: fatal("invalid option %c", c); } } if (operation == none && write_armap) ranlib_only(argv[2]); if (operation == none) fatal("no operation specified"); if (newer_only && operation != replace) fatal("'u' only meaningful with 'r' option."); arg_index = 2; if (postype != pos_default) posname = argv[arg_index++]; inarch_filename = argv[arg_index++]; if (arg_index < argc) { files = argv + arg_index; while (arg_index < argc) if (!strcmp(argv[arg_index++], "__.SYMDEF")) { ignore_symdef = 1; break; } } else files = NULL; if (operation == quick_append) { if (files != NULL) do_quick_append(inarch_filename, files); exit(0); } open_inarch(inarch_filename); /* If we have no archive, and we've been asked to replace then create one */ #if 0 if (operation == replace && inarch == &bogus_archive) { silent_create = 1; do_quick_append(inarch_filename, 0); open_inarch(inarch_filename); } #endif switch (operation) { case print_table: map_over_members(print_descr, files, argc - 3); break; case print_files: map_over_members(print_contents, files, argc - 3); break; case extract: map_over_members(extract_file, files, argc - 3); break; case delete: if (files != NULL) delete_members(files); break; case move: if (files != NULL) move_members(files); break; case replace: if (files != NULL || write_armap) replace_members(files); break; /* Shouldn't happen! */ default: fprintf(stderr, "Sorry; this option not implemented.\n"); } return (0); } /* main() */ static char *normalize(file) char *file; { char * filename = strrchr(file, '/'); if (filename != (char *)NULL) { filename ++; } else { filename = file; } return filename; } static void open_inarch(archive_filename) char *archive_filename; { bfd **last_one; bfd *next_one; struct stat sbuf; bfd_error = no_error; if (stat(archive_filename, &sbuf) != 0) { if (errno != ENOENT) bfd_fatal(archive_filename); if (!operation_alters_arch) { fprintf (stderr, "%s: %s not found.\n", program_name, archive_filename); exit (1); } if (!silent_create) fprintf(stderr, "%s: creating %s\n", program_name, archive_filename); inarch = &bogus_archive; inarch->filename = archive_filename; inarch->has_armap = true; } else { #ifdef GNU960 inarch = bfd_openr(archive_filename, default_target); #else inarch = bfd_openr(archive_filename, NULL); #endif if (inarch == NULL) { bloser: bfd_perror(archive_filename); exit(1); } if (bfd_check_format(inarch, bfd_archive) != true) fatal("File %s is not an archive.", archive_filename); #ifdef GNU960 gnu960_verify_target(inarch); /* Exits on failure */ #endif last_one = &(inarch->next); /* Read all the contents right away, regardless. */ for (next_one = bfd_openr_next_archived_file(inarch, NULL); next_one; next_one = bfd_openr_next_archived_file(inarch, next_one)) { *last_one = next_one; last_one = &next_one->next; } *last_one = (bfd *) NULL; if (bfd_error != no_more_archived_files) goto bloser; } } /* If count is 0, then function is called once on each entry. if nonzero, count is the length of the files chain; function is called on each entry whose name matches one in files */ void map_over_members(function, files, count) void (*function) (); char **files; int count; { bfd *head; if (count == 0) { for (head = inarch->next; head; head = head->next) function(head); return; } /* This may appear to be a baroque way of accomplishing what we want. however we have to iterate over the filenames in order to notice where a filename is requested but does not exist in the archive. Ditto mapping over each file each time -- we want to hack multiple references. */ for (; count > 0; files++, count--) { boolean found = false; for (head = inarch->next; head; head = head->next) if ((head->filename != NULL) && (!strcmp(*files, head->filename))) { found = true; function(head); } if (!found) fprintf(stderr, "No entry %s in archive.\n", *files); } } /* Things which are interesting to map over all or some of the files: */ void print_descr(abfd) bfd *abfd; { print_arelt_descr(abfd, verbose); } void print_contents(abfd) bfd *abfd; { int ncopied = 0; struct stat buf; long size; if (bfd_stat_arch_elt(abfd, &buf) != 0) fatal("Internal stat error on %s", abfd->filename); if (verbose) printf("\n\n\n", abfd->filename); bfd_seek(abfd, 0, SEEK_SET); size = buf.st_size; while (ncopied < size) { char cbuf[BUFSIZE]; int nread; int tocopy = size - ncopied; if (tocopy > BUFSIZE) tocopy = BUFSIZE; nread = bfd_read(cbuf, 1, tocopy, abfd); /* oops -- broke abstraction! */ if (nread != tocopy) fatal("file %s not a valid archive", abfd->my_archive->filename); fwrite(cbuf, 1, nread, stdout); ncopied += tocopy; } } /* Extract a member of the archive into its own file. We defer opening the new file until after we have read a BUFSIZ chunk of the old one, since we know we have just read the archive header for the old one. Since most members are shorter than BUFSIZ, this means we will read the old header, read the old data, write a new inode for the new file, and write the new data, and be done. This 'optimization' is what comes from sitting next to a bare disk and hearing it every time it seeks. -- Gnu Gilmore */ void extract_file(abfd) bfd *abfd; { FILE *ostream; char cbuf[BUFSIZE]; int nread, tocopy; int ncopied = 0; long size; struct stat buf; if (bfd_stat_arch_elt(abfd, &buf) != 0) fatal("Internal stat error on %s", abfd->filename); size = buf.st_size; if (verbose) printf("x - %s\n", abfd->filename); bfd_seek(abfd, 0, SEEK_SET); ostream = 0; if (size == 0) { /* Seems like an abstraction violation, eh? Well it's OK! */ ostream = fopen(abfd->filename, "w"); if (!ostream) { perror(abfd->filename); exit(1); } } else while (ncopied < size) { tocopy = size - ncopied; if (tocopy > BUFSIZE) tocopy = BUFSIZE; nread = bfd_read(cbuf, 1, tocopy, abfd); if (nread != tocopy) fatal("file %s not a valid archive", abfd->my_archive->filename); /* See comment above; this saves disk arm motion */ if (!ostream) { /* Seems like an abstraction violation, eh? Well it's OK! */ ostream = fopen(abfd->filename, "w"); if (!ostream) { perror(abfd->filename); exit(1); } } fwrite(cbuf, 1, nread, ostream); ncopied += tocopy; } fclose(ostream); chmod(abfd->filename, buf.st_mode); if (preserve_dates) { #ifdef USG long tb[2]; tb[0] = buf.st_mtime; tb[1] = buf.st_mtime; utime(abfd->filename, tb); /* FIXME check result */ #else struct timeval tv[2]; tv[0].tv_sec = buf.st_mtime; tv[0].tv_usec = 0; tv[1].tv_sec = buf.st_mtime; tv[1].tv_usec = 0; utimes(abfd->filename, tv); /* FIXME check result */ #endif } } /* Just do it quickly; don't worry about dups, armap, or anything like that */ /* This is ugly! XXX */ PROTO(struct ar_hdr *, bfd_special_undocumented_glue, (bfd *abfd, char *filename)); void do_quick_append(archive_filename, files_to_append) char *archive_filename; char **files_to_append; { FILE *ofile, *ifile; char buf[BUFSIZE]; long tocopy, thistime; bfd *temp; struct stat sbuf; boolean newfile = false; bfd_error = no_error; if (stat(archive_filename, &sbuf) != 0) { if (errno != ENOENT) bfd_fatal(archive_filename); newfile = true; } ofile = fopen(archive_filename, "a+"); if (ofile == NULL) { perror(program_name); exit(1); } /* bletch */ #ifdef GNU960 temp = bfd_openr(archive_filename, default_target); #else temp = bfd_openr(archive_filename, NULL); #endif if (temp == NULL) { bfd_perror(archive_filename); exit(1); } if (newfile == false) { if (bfd_check_format(temp, bfd_archive) != true) fatal("File %s is not an archive.", archive_filename); #ifdef GNU960 gnu960_verify_target(temp); /* Exits on failure */ #endif } else { fwrite(ARMAG, 1, SARMAG, ofile); if (!silent_create) fprintf(stderr, "%s: creating %s\n", program_name, archive_filename); } /* assume it's an achive, go straight to the end, sans $200 */ fseek(ofile, 0, 2); for (; files_to_append && *files_to_append; ++files_to_append) { struct ar_hdr *hdr = bfd_special_undocumented_glue(temp, *files_to_append); if (hdr == NULL) { bfd_perror(*files_to_append); exit(1); } BFD_SEND(temp, _bfd_truncate_arname, (temp, *files_to_append, (char *) hdr)); ifile = fopen(*files_to_append, "r"); if (ifile == NULL) bfd_perror(program_name); if (stat(*files_to_append, &sbuf) != 0) bfd_perror(*files_to_append); tocopy = sbuf.st_size; /* XXX should do error-checking! */ fwrite(hdr, 1, sizeof(struct ar_hdr), ofile); while (tocopy > 0) { thistime = tocopy; if (thistime > BUFSIZE) thistime = BUFSIZE; fread(buf, 1, thistime, ifile); fwrite(buf, 1, thistime, ofile); tocopy -= thistime; } fclose(ifile); if ((sbuf.st_size % 2) == 1) putc('\n', ofile); } fclose(ofile); bfd_close(temp); } void write_archive() { bfd *obfd; char *xmalloc(); int namelen = strlen(inarch->filename); char *new_name = xmalloc(namelen + 6); bfd *contents_head = inarch->next; #if 0 if (inarch == &bogus_archive) { /* How can this be ? */ return; } else { #endif strcpy(new_name, inarch->filename); strcpy(new_name + namelen, ".art"); obfd = bfd_openw(new_name, /* FIXME: violates abstraction; need a better protocol */ (inarch->xvec ? bfd_get_target(inarch) : NULL)); if (obfd == NULL) bfd_fatal(inarch->filename); bfd_set_format(obfd, bfd_archive); obfd->has_armap = write_armap; if (bfd_set_archive_head(obfd, contents_head) != true) bfd_fatal(inarch->filename); if (!bfd_close(obfd)) bfd_fatal(inarch->filename); /* We don't care if this fails, we might be creating the archive */ (void) unlink(inarch->filename); if (rename(new_name, inarch->filename) != 0) bfd_fatal(inarch->filename); #if 0 } #endif } /* returns a pointer to the pointer to the entry which should be rplacd'd into when altering. default_pos should be how to interpret pos_default, and should be a pos value. */ bfd ** get_pos_bfd(contents, default_pos) bfd **contents; enum pos default_pos; { bfd **after_bfd; enum pos realpos = (postype == pos_default ? default_pos : postype); switch (realpos) { case pos_end: after_bfd = contents; while (*after_bfd) { after_bfd = &((*after_bfd)->next); } break; #if 0 case pos_after: for (after_bfd = contents; after_bfd; after_bfd = after_bfd->next) if (!strcpy(after_bfd->filename, posname)) break; break; case pos_before: for (after_bfd = contents; after_bfd; after_bfd = after_bfd->next) if (after_bfd->next && (!strcpy(after_bfd->next->filename, posname))) break; #endif } return after_bfd; } void delete_members(files_to_delete) char **files_to_delete; { bfd **current_ptr_ptr; boolean found; boolean something_changed = false; for (; *files_to_delete != NULL; ++files_to_delete) { /* In a.out systems, the armap is optional. It's also called __.SYMDEF. So if the user asked to delete it, we should remember that fact. The name is NULL in COFF archives, so using this as a key is as good as anything I suppose */ if (!strcmp(*files_to_delete, "__.SYMDEF")) { inarch->has_armap = false; write_armap = false; continue; } found = false; current_ptr_ptr = &(inarch->next); while (*current_ptr_ptr) { if (strcmp(*files_to_delete, (*current_ptr_ptr)->filename) == 0) { found = true; something_changed = true; if (verbose) printf("d - %s\n", *files_to_delete); *current_ptr_ptr = ((*current_ptr_ptr)->next); goto next_file; } else { current_ptr_ptr = &((*current_ptr_ptr)->next); } } if (verbose && found == false) { printf("No member named `%s'\n", *files_to_delete); } next_file:; } if (something_changed == true) { write_archive(); } } /* Reposition existing members within an archive */ void move_members(files_to_move) char **files_to_move; { bfd **after_bfd; /* New entries go after this one */ bfd **current_ptr_ptr; /* cdr pointer into contents */ for (; *files_to_move; ++files_to_move) { current_ptr_ptr = &(inarch->next); while (*current_ptr_ptr) { bfd *current_ptr = *current_ptr_ptr; if (strcmp(normalize(*files_to_move), current_ptr->filename) == 0) { /* Move this file to the end of the list - first cut from where it is. */ *current_ptr_ptr = current_ptr->next; /* Now glue to end */ after_bfd = get_pos_bfd(&inarch->next, pos_end); *after_bfd = current_ptr; current_ptr->next = (bfd *) NULL; if (verbose) printf("m - %s\n", *files_to_move); goto next_file; } current_ptr_ptr = &((*current_ptr_ptr)->next); } fprintf(stderr, "No entry %s in archive %s!\n", *files_to_move, inarch->filename); exit(1); next_file:; } write_archive(); } /* Ought to default to replacing in place, but this is existing practice! */ void replace_members(files_to_move) char **files_to_move; { bfd **after_bfd; /* New entries go after this one */ bfd *current; bfd **current_ptr; bfd *temp; /* If the first item in the archive is an __.SYMDEF then remove it */ if (inarch->next && strcmp(inarch->next->filename, "__.SYMDEF") == 0) { inarch->next = inarch->next->next; } while (files_to_move && *files_to_move) { current_ptr = &inarch->next; while (*current_ptr) { current = *current_ptr; if (!strcmp(normalize(*files_to_move), current->filename)) { if (newer_only) { struct stat fsbuf, asbuf; if (current->arelt_data == NULL) { /* This can only happen if you specify a file on the command line more than once. */ fprintf (stderr, "Duplicate file specified: %s -- skipping.\n", *files_to_move); goto next_file; } if (stat(*files_to_move, &fsbuf) != 0) { if (errno != ENOENT) bfd_fatal(*files_to_move); goto next_file; } if (bfd_stat_arch_elt(current, &asbuf) != 0) fatal("Internal stat error on %s", current->filename); if (fsbuf.st_mtime <= asbuf.st_mtime) goto next_file; } /* snip out this entry from the chain */ *current_ptr = current->next; after_bfd = get_pos_bfd(&inarch->next, pos_end); temp = *after_bfd; *after_bfd = bfd_openr(*files_to_move, NULL); if (*after_bfd == (bfd *) NULL) { fprintf(stderr, "Can't open file %s\n", *files_to_move); exit(1); } #ifdef GNU960 gnu960_verify_target(*after_bfd); /* Exits on failure */ #endif (*after_bfd)->next = temp; if (verbose) { printf("%c - %s\n", (postype == pos_after ? 'r' : 'a'), *files_to_move); } goto next_file; } current_ptr = &(current->next); } /* It isn't in there, so add to end */ after_bfd = get_pos_bfd(&inarch->next, pos_end); temp = *after_bfd; *after_bfd = bfd_openr(*files_to_move, NULL); if (*after_bfd == (bfd *) NULL) { fprintf(stderr, "Can't open file %s\n", *files_to_move); exit(1); } #ifdef GNU960 gnu960_verify_target(*after_bfd); /* Exits on failure */ #endif if (verbose) { printf("c - %s\n", *files_to_move); } (*after_bfd)->next = temp; next_file:; files_to_move++; } write_archive(); } void ranlib_only(archname) char *archname; { write_armap = true; open_inarch(archname); write_archive(); exit(0); }