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https://github.com/koreader/koreader
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8245017078
1. In extr.c the error message should use the correct full pathname, not the base filename. 2. In pdfattach the check for existence of input files should be replaced with the check for read access to them.
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
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extr: Extract attachments from PDF file
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Usage: extr /dir/file.pdf pageno
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Returns 0 if one or more attachments saved, otherwise returns non-zero.
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Prints the number of saved attachments on stdout.
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Attachments are saved in /dir directory with the appropriate filenames.
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Copyright (C) 2012 Tigran Aivazian <tigran@bibles.org.uk>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mupdf-internal.h"
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#include <libgen.h>
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static pdf_document *doc;
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void dump_stream(int i, FILE *fout)
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{
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fz_stream *stm = pdf_open_stream(doc, i, 0);
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static unsigned char buf[8192];
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while (1) {
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int n = fz_read(stm, buf, sizeof buf);
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if (n == 0) break;
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fwrite(buf, 1, n, fout);
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}
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fz_close(stm);
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}
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/* returns the number of attachments saved */
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int save_attachments(int pageno, char *targetdir)
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{
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pdf_page *page = pdf_load_page(doc, pageno-1);
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pdf_annot *annot;
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int saved_count = 0;
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for (annot = page->annots; annot ; annot = annot->next) {
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pdf_obj *fs_obj = pdf_dict_gets(annot->obj, "FS");
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if (fs_obj) {
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pdf_obj *ef_obj;
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char *name = basename(strdup(pdf_to_str_buf(pdf_dict_gets(fs_obj, "F"))));
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ef_obj = pdf_dict_gets(fs_obj, "EF");
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if (ef_obj) {
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pdf_obj *f_obj = pdf_dict_gets(ef_obj, "F");
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if (f_obj && pdf_is_indirect(f_obj)) {
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static char pathname[PATH_MAX];
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sprintf(pathname, "%s/%s", targetdir, name);
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FILE *fout = fopen(pathname, "w");
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if (!fout) {
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fprintf(stderr, "extr: cannot write to file %s\n", pathname);
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exit(1);
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}
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dump_stream(pdf_to_num(f_obj), fout);
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fclose(fout);
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saved_count++;
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}
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}
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}
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}
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return saved_count;
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}
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int main(int argc, char *argv[])
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{
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int saved = 0;
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if (argc != 3) {
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printf("Usage: extr file.pdf pageno\n");
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exit(1);
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}
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char *filename = strdup(argv[1]);
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char *dir = dirname(strdup(filename));
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int pageno = atoi(argv[2]);
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fz_context *ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
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if (!ctx) {
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fprintf(stderr, "extr: cannot create context\n");
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exit(1);
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}
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fz_var(doc);
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fz_try(ctx) {
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doc = pdf_open_document(ctx, filename);
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saved = save_attachments(pageno, dir);
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}
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fz_catch(ctx)
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{
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}
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printf("%d\n", saved);
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return 0;
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}
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