A question about extracting a zip archive in C...
by trist007 from LinuxQuestions.org on (#56WEM)
I am using the libzip library.
I just want to extract the contents into a directory. I have no problem opening the archive, getting the number of files in the archive, using a for loop for the number of files to stat the files by index, open a file with the filename that corresponds to that index, run a read and write while loop, then close the file and close the zip archive. However, the issue is that some filenames that I get from the zip_stat_index are prepended with a directory. It would have been nice if the directory was listed on its own as a separate index but it is not. I don't see any options in the open system call to create one or more parent directories if the filename being opened/created is under one or more directories.
Here is my code so far
Code:#include <zip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#define BUFSIZE 4096
int main()
{
int i = 0;
int x = 0;
int n = 0;
int file = 0;
zip_int64_t *zipfile;
char buf[BUFSIZE];
struct zip *z;
struct zip_stat st;
int err = 0;
z = zip_open("/usr/share/httpd/mapcrafter/worlds/Freehold/freehold.zip", 0, &err);
zip_stat_init(&st);
x = zip_get_num_files(z);
printf("There are %i number of files in this archive.\n", x);
printf("Here is a list of the files in the archive.\n");
for (i = 0; i < x; i++) {
zip_stat_index(z, i, 0, &st);
file = open(st.name, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
zipfile = zip_fopen_index(z, i, 0);
while ((n = read(zipfile, buf, sizeof buf)) > 0)
write(file, buf, n);
close(file);
zip_fclose(zipfile);
printf("Copied %s...\n", st.name);
}
zip_close(z);
return 0;
}Here is the output
Code:There are 222 number of files in this archive.
Here is a list of the files in the archive.
Copied stats/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.json...
Copied stats/eb231265-254a-41f2-97d8-b479b24ddaf7.json...
Copied icon.png...
Copied level.dat...
Copied level.dat_old...
Copied session.lock...
Copied advancements/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.json...
Copied advancements/eb231265-254a-41f2-97d8-b479b24ddaf7.json...
Copied data/advancements/...
Copied data/EndCity.dat...
Copied data/Fortress.dat...
Copied data/functions/...
Copied data/Mineshaft.dat...
Copied data/Monument.dat...
Copied data/Stronghold.dat...
Copied data/Temple.dat...
Copied data/Village.dat...
Copied data/villages.dat...
Copied data/villages_end.dat...
Copied data/villages_nether.dat...
Copied DIM1/region/...
Copied DIM1/region/r.0.0.mca...
Copied DIM1/region/r.0.1.mca...
Copied DIM1/region/r.0.-1.mca...
Copied DIM1/region/r.0.2.mca...
Copied DIM1/region/r.0.-2.mca...
Copied DIM1/region/r.1.0.mca...
Copied DIM1/region/r.-1.0.mca...
Copied DIM1/region/r.1.1.mca...
Copied DIM1/region/r.1.-1.mca...
Copied DIM1/region/r.-1.1.mca...
Copied DIM1/region/r.-1.-1.mca...
Copied DIM1/region/r.1.2.mca...
Copied DIM1/region/r.1.-2.mca...
Copied DIM1/region/r.-1.-2.mca...
Copied DIM1/region/r.2.0.mca...
Copied DIM1/region/r.-2.0.mca...
Copied DIM1/region/r.2.1.mca...
Copied DIM1/region/r.-2.-1.mca...
Copied DIM1/region/r.2.2.mca...
Copied DIM1/region/r.-2.2.mca...
Copied DIM1/region/r.-2.-2.mca...
Copied DIM1/region/r.3.0.mca...
Copied DIM1/region/r.3.1.mca...
Copied DIM1/region/r.3.-1.mca...
Copied DIM1/region/r.3.2.mca...
Copied DIM1/region/r.3.-2.mca...
Copied DIM1/region/r.-3.2.mca...
Copied DIM1/region/r.3.-3.mca...
Copied DIM1/region/r.4.0.mca...
Copied DIM1/region/r.4.1.mca...
Copied DIM1/region/r.4.-1.mca...
Copied DIM1/region/r.4.2.mca...
Copied DIM1/region/r.4.-2.mca...
Copied DIM1/region/r.4.3.mca...
Copied DIM1/region/r.4.-3.mca...
Copied DIM1/region/r.5.0.mca...
Copied DIM1/region/r.5.1.mca...
Copied DIM1/region/r.5.-1.mca...
Copied DIM1/region/r.5.2.mca...
Copied DIM1/region/r.5.-2.mca...
Copied DIM1/region/r.5.3.mca...
Copied DIM1/region/r.5.-3.mca...
Copied DIM-1/region/...
Copied DIM-1/region/r.0.0.mca...
Copied DIM-1/region/r.0.-1.mca...
Copied DIM-1/region/r.0.-2.mca...
Copied DIM-1/region/r.1.0.mca...
Copied DIM-1/region/r.-1.0.mca...
Copied DIM-1/region/r.1.-1.mca...
Copied DIM-1/region/r.-1.-1.mca...
Copied DIM-1/region/r.1.-2.mca...
Copied DIM-1/region/r.-1.-2.mca...
Copied DIM-1/region/r.-2.-1.mca...
Copied playerdata/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.dat...
Copied playerdata/eb231265-254a-41f2-97d8-b479b24ddaf7.dat...
Copied region/r.0.0.mca...
Copied region/r.0.1.mca...
Copied region/r.0.-1.mca...
Copied region/r.0.2.mca...
Copied region/r.0.-2.mca...
Copied region/r.0.3.mca...
Copied region/r.0.-3.mca...
Copied region/r.0.4.mca...
Copied region/r.0.-4.mca...
Copied region/r.0.5.mca...
Copied region/r.0.-5.mca...
Copied region/r.0.6.mca...
Copied region/r.0.-6.mca...
Copied region/r.0.7.mca...
Copied region/r.0.-7.mca...
Copied region/r.1.0.mca...
Copied region/r.-1.0.mca...
Copied region/r.1.1.mca...
Copied region/r.1.-1.mca...
Copied region/r.-1.1.mca...
Copied region/r.-1.-1.mca...
Copied region/r.1.2.mca...
Copied region/r.1.-2.mca...
Copied region/r.-1.2.mca...
Copied region/r.-1.-2.mca...
Copied region/r.1.3.mca...
Copied region/r.1.-3.mca...
Copied region/r.-1.3.mca...
Copied region/r.-1.-3.mca...
Copied region/r.1.4.mca...
Copied region/r.1.-4.mca...
Copied region/r.-1.4.mca...
Copied region/r.-1.-4.mca...
Copied region/r.1.5.mca...
Copied region/r.1.-5.mca...
Copied region/r.-1.5.mca...
Copied region/r.-1.-5.mca...
Copied region/r.1.6.mca...
Copied region/r.1.-6.mca...
Copied region/r.-1.6.mca...
Copied region/r.-1.-6.mca...
Copied region/r.1.7.mca...
Copied region/r.1.-7.mca...
Copied region/r.1.8.mca...
Copied region/r.-10.1.mca...
Copied region/r.-10.2.mca...
Copied region/r.2.0.mca...
Copied region/r.-2.0.mca...
Copied region/r.2.1.mca...
Copied region/r.2.-1.mca...
Copied region/r.-2.1.mca...
Copied region/r.-2.-1.mca...
Copied region/r.2.2.mca...
Copied region/r.2.-2.mca...
Copied region/r.-2.2.mca...
Copied region/r.-2.-2.mca...
Copied region/r.2.3.mca...
Copied region/r.2.-3.mca...
Copied region/r.-2.3.mca...
Copied region/r.-2.-3.mca...
Copied region/r.2.4.mca...
Copied region/r.2.-4.mca...
Copied region/r.-2.-4.mca...
Copied region/r.2.5.mca...
Copied region/r.2.-5.mca...
Copied region/r.-2.-5.mca...
Copied region/r.2.6.mca...
Copied region/r.2.-6.mca...
Copied region/r.-2.-6.mca...
Copied region/r.2.7.mca...
Copied region/r.2.8.mca...
Copied region/r.3.0.mca...
Copied region/r.-3.0.mca...
Copied region/r.3.1.mca...
Copied region/r.3.-1.mca...
Copied region/r.-3.1.mca...
Copied region/r.-3.-1.mca...
Copied region/r.3.2.mca...
Copied region/r.3.-2.mca...
Copied region/r.-3.2.mca...
Copied region/r.-3.-2.mca...
Copied region/r.3.3.mca...
Copied region/r.3.-3.mca...
Copied region/r.-3.3.mca...
Copied region/r.-3.-3.mca...
Copied region/r.3.4.mca...
Copied region/r.3.-4.mca...
Copied region/r.-3.-4.mca...
Copied region/r.3.5.mca...
Copied region/r.3.-5.mca...
Copied region/r.-3.-5.mca...
Copied region/r.3.6.mca...
Copied region/r.3.-6.mca...
Copied region/r.3.7.mca...
Copied region/r.4.0.mca...
Copied region/r.-4.0.mca...
Copied region/r.4.1.mca...
Copied region/r.4.-1.mca...
Copied region/r.-4.1.mca...
Copied region/r.-4.-1.mca...
Copied region/r.4.2.mca...
Copied region/r.4.-2.mca...
Copied region/r.-4.2.mca...
Copied region/r.4.-3.mca...
Copied region/r.4.4.mca...
Copied region/r.4.-4.mca...
Copied region/r.4.5.mca...
Copied region/r.4.-5.mca...
Copied region/r.4.6.mca...
Copied region/r.4.-6.mca...
Copied region/r.4.7.mca...
Copied region/r.4.-7.mca...
Copied region/r.-5.0.mca...
Copied region/r.5.1.mca...
Copied region/r.-5.1.mca...
Copied region/r.-5.-1.mca...
Copied region/r.5.2.mca...
Copied region/r.-5.2.mca...
Copied region/r.5.3.mca...
Copied region/r.5.-4.mca...
Copied region/r.5.-5.mca...
Copied region/r.5.-6.mca...
Copied region/r.5.-7.mca...
Copied region/r.-6.0.mca...
Copied region/r.6.1.mca...
Copied region/r.-6.1.mca...
Copied region/r.-6.-1.mca...
Copied region/r.6.2.mca...
Copied region/r.-6.2.mca...
Copied region/r.6.3.mca...
Copied region/r.6.-4.mca...
Copied region/r.6.-5.mca...
Copied region/r.6.-6.mca...
Copied region/r.-7.0.mca...
Copied region/r.7.1.mca...
Copied region/r.-7.1.mca...
Copied region/r.-7.-1.mca...
Copied region/r.7.2.mca...
Copied region/r.-7.2.mca...
Copied region/r.7.-5.mca...
Copied region/r.7.-6.mca...
Copied region/r.-8.0.mca...
Copied region/r.-8.1.mca...
Copied region/r.-8.2.mca...
Copied region/r.-9.1.mca...
Copied region/r.-9.2.mca...I mean do I really have to stat each index and scan for "/" to see if that index contains a directory? There must be an easier way. Here are the docs for the libzip library. Thank you!!
https://libzip.org/documentation/
-Tristan
I just want to extract the contents into a directory. I have no problem opening the archive, getting the number of files in the archive, using a for loop for the number of files to stat the files by index, open a file with the filename that corresponds to that index, run a read and write while loop, then close the file and close the zip archive. However, the issue is that some filenames that I get from the zip_stat_index are prepended with a directory. It would have been nice if the directory was listed on its own as a separate index but it is not. I don't see any options in the open system call to create one or more parent directories if the filename being opened/created is under one or more directories.
Here is my code so far
Code:#include <zip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#define BUFSIZE 4096
int main()
{
int i = 0;
int x = 0;
int n = 0;
int file = 0;
zip_int64_t *zipfile;
char buf[BUFSIZE];
struct zip *z;
struct zip_stat st;
int err = 0;
z = zip_open("/usr/share/httpd/mapcrafter/worlds/Freehold/freehold.zip", 0, &err);
zip_stat_init(&st);
x = zip_get_num_files(z);
printf("There are %i number of files in this archive.\n", x);
printf("Here is a list of the files in the archive.\n");
for (i = 0; i < x; i++) {
zip_stat_index(z, i, 0, &st);
file = open(st.name, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
zipfile = zip_fopen_index(z, i, 0);
while ((n = read(zipfile, buf, sizeof buf)) > 0)
write(file, buf, n);
close(file);
zip_fclose(zipfile);
printf("Copied %s...\n", st.name);
}
zip_close(z);
return 0;
}Here is the output
Code:There are 222 number of files in this archive.
Here is a list of the files in the archive.
Copied stats/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.json...
Copied stats/eb231265-254a-41f2-97d8-b479b24ddaf7.json...
Copied icon.png...
Copied level.dat...
Copied level.dat_old...
Copied session.lock...
Copied advancements/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.json...
Copied advancements/eb231265-254a-41f2-97d8-b479b24ddaf7.json...
Copied data/advancements/...
Copied data/EndCity.dat...
Copied data/Fortress.dat...
Copied data/functions/...
Copied data/Mineshaft.dat...
Copied data/Monument.dat...
Copied data/Stronghold.dat...
Copied data/Temple.dat...
Copied data/Village.dat...
Copied data/villages.dat...
Copied data/villages_end.dat...
Copied data/villages_nether.dat...
Copied DIM1/region/...
Copied DIM1/region/r.0.0.mca...
Copied DIM1/region/r.0.1.mca...
Copied DIM1/region/r.0.-1.mca...
Copied DIM1/region/r.0.2.mca...
Copied DIM1/region/r.0.-2.mca...
Copied DIM1/region/r.1.0.mca...
Copied DIM1/region/r.-1.0.mca...
Copied DIM1/region/r.1.1.mca...
Copied DIM1/region/r.1.-1.mca...
Copied DIM1/region/r.-1.1.mca...
Copied DIM1/region/r.-1.-1.mca...
Copied DIM1/region/r.1.2.mca...
Copied DIM1/region/r.1.-2.mca...
Copied DIM1/region/r.-1.-2.mca...
Copied DIM1/region/r.2.0.mca...
Copied DIM1/region/r.-2.0.mca...
Copied DIM1/region/r.2.1.mca...
Copied DIM1/region/r.-2.-1.mca...
Copied DIM1/region/r.2.2.mca...
Copied DIM1/region/r.-2.2.mca...
Copied DIM1/region/r.-2.-2.mca...
Copied DIM1/region/r.3.0.mca...
Copied DIM1/region/r.3.1.mca...
Copied DIM1/region/r.3.-1.mca...
Copied DIM1/region/r.3.2.mca...
Copied DIM1/region/r.3.-2.mca...
Copied DIM1/region/r.-3.2.mca...
Copied DIM1/region/r.3.-3.mca...
Copied DIM1/region/r.4.0.mca...
Copied DIM1/region/r.4.1.mca...
Copied DIM1/region/r.4.-1.mca...
Copied DIM1/region/r.4.2.mca...
Copied DIM1/region/r.4.-2.mca...
Copied DIM1/region/r.4.3.mca...
Copied DIM1/region/r.4.-3.mca...
Copied DIM1/region/r.5.0.mca...
Copied DIM1/region/r.5.1.mca...
Copied DIM1/region/r.5.-1.mca...
Copied DIM1/region/r.5.2.mca...
Copied DIM1/region/r.5.-2.mca...
Copied DIM1/region/r.5.3.mca...
Copied DIM1/region/r.5.-3.mca...
Copied DIM-1/region/...
Copied DIM-1/region/r.0.0.mca...
Copied DIM-1/region/r.0.-1.mca...
Copied DIM-1/region/r.0.-2.mca...
Copied DIM-1/region/r.1.0.mca...
Copied DIM-1/region/r.-1.0.mca...
Copied DIM-1/region/r.1.-1.mca...
Copied DIM-1/region/r.-1.-1.mca...
Copied DIM-1/region/r.1.-2.mca...
Copied DIM-1/region/r.-1.-2.mca...
Copied DIM-1/region/r.-2.-1.mca...
Copied playerdata/a82d1496-1f6f-4df6-9f49-33b48c1e69b2.dat...
Copied playerdata/eb231265-254a-41f2-97d8-b479b24ddaf7.dat...
Copied region/r.0.0.mca...
Copied region/r.0.1.mca...
Copied region/r.0.-1.mca...
Copied region/r.0.2.mca...
Copied region/r.0.-2.mca...
Copied region/r.0.3.mca...
Copied region/r.0.-3.mca...
Copied region/r.0.4.mca...
Copied region/r.0.-4.mca...
Copied region/r.0.5.mca...
Copied region/r.0.-5.mca...
Copied region/r.0.6.mca...
Copied region/r.0.-6.mca...
Copied region/r.0.7.mca...
Copied region/r.0.-7.mca...
Copied region/r.1.0.mca...
Copied region/r.-1.0.mca...
Copied region/r.1.1.mca...
Copied region/r.1.-1.mca...
Copied region/r.-1.1.mca...
Copied region/r.-1.-1.mca...
Copied region/r.1.2.mca...
Copied region/r.1.-2.mca...
Copied region/r.-1.2.mca...
Copied region/r.-1.-2.mca...
Copied region/r.1.3.mca...
Copied region/r.1.-3.mca...
Copied region/r.-1.3.mca...
Copied region/r.-1.-3.mca...
Copied region/r.1.4.mca...
Copied region/r.1.-4.mca...
Copied region/r.-1.4.mca...
Copied region/r.-1.-4.mca...
Copied region/r.1.5.mca...
Copied region/r.1.-5.mca...
Copied region/r.-1.5.mca...
Copied region/r.-1.-5.mca...
Copied region/r.1.6.mca...
Copied region/r.1.-6.mca...
Copied region/r.-1.6.mca...
Copied region/r.-1.-6.mca...
Copied region/r.1.7.mca...
Copied region/r.1.-7.mca...
Copied region/r.1.8.mca...
Copied region/r.-10.1.mca...
Copied region/r.-10.2.mca...
Copied region/r.2.0.mca...
Copied region/r.-2.0.mca...
Copied region/r.2.1.mca...
Copied region/r.2.-1.mca...
Copied region/r.-2.1.mca...
Copied region/r.-2.-1.mca...
Copied region/r.2.2.mca...
Copied region/r.2.-2.mca...
Copied region/r.-2.2.mca...
Copied region/r.-2.-2.mca...
Copied region/r.2.3.mca...
Copied region/r.2.-3.mca...
Copied region/r.-2.3.mca...
Copied region/r.-2.-3.mca...
Copied region/r.2.4.mca...
Copied region/r.2.-4.mca...
Copied region/r.-2.-4.mca...
Copied region/r.2.5.mca...
Copied region/r.2.-5.mca...
Copied region/r.-2.-5.mca...
Copied region/r.2.6.mca...
Copied region/r.2.-6.mca...
Copied region/r.-2.-6.mca...
Copied region/r.2.7.mca...
Copied region/r.2.8.mca...
Copied region/r.3.0.mca...
Copied region/r.-3.0.mca...
Copied region/r.3.1.mca...
Copied region/r.3.-1.mca...
Copied region/r.-3.1.mca...
Copied region/r.-3.-1.mca...
Copied region/r.3.2.mca...
Copied region/r.3.-2.mca...
Copied region/r.-3.2.mca...
Copied region/r.-3.-2.mca...
Copied region/r.3.3.mca...
Copied region/r.3.-3.mca...
Copied region/r.-3.3.mca...
Copied region/r.-3.-3.mca...
Copied region/r.3.4.mca...
Copied region/r.3.-4.mca...
Copied region/r.-3.-4.mca...
Copied region/r.3.5.mca...
Copied region/r.3.-5.mca...
Copied region/r.-3.-5.mca...
Copied region/r.3.6.mca...
Copied region/r.3.-6.mca...
Copied region/r.3.7.mca...
Copied region/r.4.0.mca...
Copied region/r.-4.0.mca...
Copied region/r.4.1.mca...
Copied region/r.4.-1.mca...
Copied region/r.-4.1.mca...
Copied region/r.-4.-1.mca...
Copied region/r.4.2.mca...
Copied region/r.4.-2.mca...
Copied region/r.-4.2.mca...
Copied region/r.4.-3.mca...
Copied region/r.4.4.mca...
Copied region/r.4.-4.mca...
Copied region/r.4.5.mca...
Copied region/r.4.-5.mca...
Copied region/r.4.6.mca...
Copied region/r.4.-6.mca...
Copied region/r.4.7.mca...
Copied region/r.4.-7.mca...
Copied region/r.-5.0.mca...
Copied region/r.5.1.mca...
Copied region/r.-5.1.mca...
Copied region/r.-5.-1.mca...
Copied region/r.5.2.mca...
Copied region/r.-5.2.mca...
Copied region/r.5.3.mca...
Copied region/r.5.-4.mca...
Copied region/r.5.-5.mca...
Copied region/r.5.-6.mca...
Copied region/r.5.-7.mca...
Copied region/r.-6.0.mca...
Copied region/r.6.1.mca...
Copied region/r.-6.1.mca...
Copied region/r.-6.-1.mca...
Copied region/r.6.2.mca...
Copied region/r.-6.2.mca...
Copied region/r.6.3.mca...
Copied region/r.6.-4.mca...
Copied region/r.6.-5.mca...
Copied region/r.6.-6.mca...
Copied region/r.-7.0.mca...
Copied region/r.7.1.mca...
Copied region/r.-7.1.mca...
Copied region/r.-7.-1.mca...
Copied region/r.7.2.mca...
Copied region/r.-7.2.mca...
Copied region/r.7.-5.mca...
Copied region/r.7.-6.mca...
Copied region/r.-8.0.mca...
Copied region/r.-8.1.mca...
Copied region/r.-8.2.mca...
Copied region/r.-9.1.mca...
Copied region/r.-9.2.mca...I mean do I really have to stat each index and scan for "/" to see if that index contains a directory? There must be an easier way. Here are the docs for the libzip library. Thank you!!
https://libzip.org/documentation/
-Tristan