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using libzip to extract files
/* Copyright (C) 2011 rocenting#gmail.com */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <dirent.h>
#include <limits.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <limits.h>
#include <zip.h>
const char *prg;
static void safe_create_dir(const char *dir)
{
if (mkdir(dir, 0755) < 0) {
if (errno != EEXIST) {
perror(dir);
exit(1);
}
}
}
int main(int argc, char *argv[])
{
const char *archive;
struct zip *za;
struct zip_file *zf;
struct zip_stat sb;
char buf[100];
int err;
int i, len;
int fd;
long long sum;
prg = argv[0];
if (argc != 2) {
fprintf(stderr, "usage: %s archive\n", prg);
return 1;
}
archive = argv[1];
if ((za = zip_open(archive, 0, &err)) == NULL) {
zip_error_to_str(buf, sizeof(buf), err, errno);
fprintf(stderr, "%s: can't open zip archive `%s': %s/n", prg,
archive, buf);
return 1;
}
for (i = 0; i < zip_get_num_entries(za, 0); i++) {
if (zip_stat_index(za, i, 0, &sb) == 0) {
printf("==================/n");
len = strlen(sb.name);
printf("Name: [%s], ", sb.name);
printf("Size: [%llu], ", sb.size);
printf("mtime: [%u]/n", (unsigned int)sb.mtime);
if (sb.name[len - 1] == '/') {
safe_create_dir(sb.name);
} else {
zf = zip_fopen_index(za, i, 0);
if (!zf) {
fprintf(stderr, "boese, boese/n");
exit(100);
}
fd = open(sb.name, O_RDWR | O_TRUNC | O_CREAT, 0644);
if (fd < 0) {
fprintf(stderr, "boese, boese/n");
exit(101);
}
sum = 0;
while (sum != sb.size) {
len = zip_fread(zf, buf, 100);
if (len < 0) {
fprintf(stderr, "boese, boese/n");
exit(102);
}
write(fd, buf, len);
sum += len;
}
close(fd);
zip_fclose(zf);
}
} else {
printf("File[%s] Line[%d]/n", __FILE__, __LINE__);
}
}
if (zip_close(za) == -1) {
fprintf(stderr, "%s: can't close zip archive `%s'/n", prg, archive);
return 1;
}
return 0;
}
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ghost commented Oct 8, 2014

gcc  libzip_simple.c  -lzip -o  libzip_simple.out

@alexsilva
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Windows O_BINARY is required. Or binary file as zip inside zip become corrupted.

fd = open(sb.name, O_RDWR | O_TRUNC | O_CREAT | O_BINARY, 0644);

@mbruel
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mbruel commented Jan 6, 2020

if you wish to unzip a password protected zip file, you just need to add this before the for loop
int iRetPassword = zip_set_default_password(za, "the_password"); printf("password: %i", iRetPassword);

I've made a C++/Qt implementation that deals with password. It's available here on my github

@richdrich
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What C environment uses "/n" rather than "\n"

@BCDeshiG
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BCDeshiG commented Nov 5, 2021

Ouch the duplicate includes.
Also hello Google Search.

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