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![eraserxl](/assets/img/avatar_default.png)
* Removed unzip sources. Using lib unzip instead. These changes might require a make clean before building.
300 lines
7.9 KiB
C
300 lines
7.9 KiB
C
/*
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miniunz.c
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Version 1.01e, February 12th, 2005
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Copyright (C) 1998-2005 Gilles Vollant
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include <fcntl.h>
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# include <unistd.h>
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# include <utime.h>
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#include "miniunz.h"
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#define CASESENSITIVITY (0)
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#define WRITEBUFFERSIZE (8192)
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#define MAXFILENAME (256)
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static int mymkdir(const char* dirname)
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{
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int ret = 0;
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ret = mkdir(dirname, 0775);
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return ret;
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}
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int makedir(char *newdir)
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{
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char *buffer;
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char *p;
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int len = (int) strlen(newdir);
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if (len <= 0) return 0;
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buffer = (char*) malloc(len + 1);
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strcpy(buffer, newdir);
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if (buffer[len - 1] == '/')
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{
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buffer[len - 1] = '\0';
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}
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if (mymkdir(buffer) == 0)
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{
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free(buffer);
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return 1;
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}
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p = buffer + 1;
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while (1)
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{
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char hold;
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while (*p && *p != '\\' && *p != '/')
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p++;
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hold = *p;
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*p = 0;
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if ((mymkdir(buffer) == -1) && (errno == ENOENT))
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{
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// printf("couldn't create directory %s\n",buffer);
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free(buffer);
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return 0;
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}
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if (hold == 0) break;
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*p++ = hold;
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}
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free(buffer);
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return 1;
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}
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static char *fullfilename(const char *basedir, char *filename)
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{
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char *file = (char *) malloc(strlen(basedir) + strlen(filename) + 1);
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if (basedir == NULL)
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{
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strcpy(file, filename);
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}
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else
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{
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if (basedir[strlen(basedir) - 1] == '/')
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{
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sprintf(file, "%s%s", basedir, filename);
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}
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else
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{
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sprintf(file, "%s/%s", basedir, filename);
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}
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}
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return file;
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}
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static int do_extract_currentfile(unzFile uf, const int* popt_extract_without_path, int* popt_overwrite,
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const char* password, const char *basedir)
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{
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char filename_inzip[256];
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char* filename_withoutpath;
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char* filename_withpath;
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char* p;
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int err = UNZ_OK;
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FILE *fout = NULL;
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void* buf;
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uInt size_buf;
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unz_file_info file_info;
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err = unzGetCurrentFileInfo(uf, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, NULL, 0);
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if (err != UNZ_OK)
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{
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// printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
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return err;
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}
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size_buf = WRITEBUFFERSIZE;
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buf = (void*) malloc(size_buf);
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if (buf == NULL)
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{
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// printf("Error allocating memory\n");
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return UNZ_INTERNALERROR;
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}
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p = filename_withoutpath = filename_inzip;
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filename_withpath = fullfilename(basedir, filename_inzip);
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while ((*p) != '\0')
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{
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if (((*p) == '/') || ((*p) == '\\')) filename_withoutpath = p + 1;
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p++;
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}
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if ((*filename_withoutpath) == '\0')
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{
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if ((*popt_extract_without_path) == 0)
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{
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// Fix the path, this will fail if the directoryname is the same as the first filename in the zip
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char *path = (char *) malloc(strlen(filename_withpath));
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strcpy(path, filename_withpath);
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char *ptr = strstr(path, filename_withoutpath);
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*ptr = '\0';
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// printf("creating directory: %s\n",path);
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mymkdir(path);
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free(path);
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}
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}
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else
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{
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char* write_filename;
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int skip = 0;
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if ((*popt_extract_without_path) == 0)
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write_filename = filename_withpath;
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else write_filename = filename_withoutpath;
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err = unzOpenCurrentFilePassword(uf, password);
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if (err != UNZ_OK)
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{
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// printf("error %d with zipfile in unzOpenCurrentFilePassword\n",err);
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}
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if (((*popt_overwrite) == 0) && (err == UNZ_OK))
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{
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char rep = 0;
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FILE* ftestexist;
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ftestexist = fopen(write_filename, "rb");
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if (ftestexist != NULL)
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{
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fclose(ftestexist);
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do
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{
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char answer[128];
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int ret;
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// printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
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ret = scanf("%1s", answer);
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if (ret != 1)
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{
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exit(EXIT_FAILURE);
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}
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rep = answer[0];
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if ((rep >= 'a') && (rep <= 'z')) rep -= 0x20;
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} while ((rep != 'Y') && (rep != 'N') && (rep != 'A'));
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}
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if (rep == 'N') skip = 1;
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if (rep == 'A') *popt_overwrite = 1;
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}
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if ((skip == 0) && (err == UNZ_OK))
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{
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fout = fopen(write_filename, "wb");
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/* some zipfile don't contain directory alone before file */
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if ((fout == NULL) && ((*popt_extract_without_path) == 0) && (filename_withoutpath
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!= (char*) filename_inzip))
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{
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char c = *(filename_withoutpath - 1);
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*(filename_withoutpath - 1) = '\0';
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// Fix the path, this will fail if the directoryname is the same as the first filename in the zip
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char *path = (char *) malloc(strlen(write_filename));
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strcpy(path, write_filename);
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char *ptr = strstr(path, filename_withoutpath);
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*ptr = '\0';
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makedir(path);
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free(path);
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*(filename_withoutpath - 1) = c;
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fout = fopen(write_filename, "wb");
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}
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if (fout == NULL)
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{
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// printf("error opening %s\n",write_filename);
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}
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}
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if (fout != NULL)
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{
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// printf(" extracting: %s\n",write_filename);
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do
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{
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err = unzReadCurrentFile(uf, buf, size_buf);
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if (err < 0)
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{
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// printf("error %d with zipfile in unzReadCurrentFile\n",err);
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break;
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}
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if (err > 0) if (fwrite(buf, err, 1, fout) != 1)
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{
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// printf("error in writing extracted file\n");
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err = UNZ_ERRNO;
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break;
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}
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} while (err > 0);
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if (fout) fclose(fout);
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}
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if (err == UNZ_OK)
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{
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err = unzCloseCurrentFile(uf);
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if (err != UNZ_OK)
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{
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// printf("error %d with zipfile in unzCloseCurrentFile\n",err);
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}
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}
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else unzCloseCurrentFile(uf); /* don't lose the error */
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}
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free(filename_withpath);
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free(buf);
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return err;
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}
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int extractZip(unzFile uf, int opt_extract_without_path, int opt_overwrite, const char* password, const char *basedir)
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{
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uLong i;
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unz_global_info gi;
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int err;
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err = unzGetGlobalInfo(uf, &gi);
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if (err != UNZ_OK)
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// printf("error %d with zipfile in unzGetGlobalInfo \n",err);
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for (i = 0; i < gi.number_entry; i++)
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{
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if (do_extract_currentfile(uf, &opt_extract_without_path, &opt_overwrite, password, basedir) != UNZ_OK) break;
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if ((i + 1) < gi.number_entry)
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{
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err = unzGoToNextFile(uf);
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if (err != UNZ_OK)
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{
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// printf("error %d with zipfile in unzGoToNextFile\n",err);
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break;
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}
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}
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}
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return 0;
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}
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int extractZipOnefile(unzFile uf, const char* filename, int opt_extract_without_path, int opt_overwrite,
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const char* password)
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{
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if (unzLocateFile(uf, filename, CASESENSITIVITY) != UNZ_OK)
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{
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// printf("file %s not found in the zipfile\n",filename);
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return 2;
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}
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if (do_extract_currentfile(uf, &opt_extract_without_path, &opt_overwrite, password, NULL) == UNZ_OK)
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return 0;
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else return 1;
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}
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