C libzip example

libzip-example.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <dirent.h>
#include <sys/stat.h>
#include <errno.h>

#include <zip.h>

static int is_dir(const char* path) {
    struct stat path_stat;
    stat(path, &path_stat);
    return S_ISDIR(path_stat.st_mode);
}

static void walk_directory(const char* startdir, const char* inputdir, zip_t* archive) {
    DIR *dp = opendir(inputdir);
    if (!dp) {
        perror("Failed to open input directory");
        return;
    }

    struct dirent *dirp;
    while ((dirp = readdir(dp)) != NULL) {
        if (strcmp(dirp->d_name, ".") && strcmp(dirp->d_name, "..")) {
            char* fullname = (char*)calloc((3 + strlen(inputdir) + strlen(dirp->d_name)), sizeof(char));
            snprintf(fullname, (3 + strlen(inputdir) + strlen(dirp->d_name)), "%s/%s", inputdir, dirp->d_name);
            if (is_dir(fullname)) {
                if (zip_dir_add(archive, fullname+strlen(startdir)+1, ZIP_FL_ENC_UTF_8) < 0) {
                    fprintf(stderr, "Failed to add directory to zip: %s\n", zip_strerror(archive));
                    return;
                }
                walk_directory(startdir, fullname, archive);      
            } else {
                zip_source_t *source = zip_source_file(archive, fullname, 0, 0);
                if (!source) {
                    fprintf(stderr, "Failed to add file to zip: %s\n", zip_strerror(archive));
                }
                if (zip_file_add(archive, fullname+strlen(startdir)+1, source, ZIP_FL_ENC_UTF_8) < 0) {
                    zip_source_free(source);
                    fprintf(stderr, "Failed to add file to zip: %s\n", zip_strerror(archive));
                }
            }
        }
    }
    closedir(dp);
}

void zip_directory(const char* input, const char* output) {
    int errorp;
    zip_t* archive = zip_open(output, ZIP_CREATE | ZIP_EXCL, &errorp);
    if (!archive) {
        zip_error_t ziperror;
        zip_error_init_with_code(&ziperror, errorp);
        fprintf(stderr, "Failed to open output file %s: %s\n", output, zip_error_strerror(&ziperror));
        zip_close(archive);
        return;
    }
    walk_directory(input, input, archive);
    zip_close(archive);
}

int main(int argc, char** argv) {
    if (argv < 3) {
        fputs("2 required arguments: input directory, output zip", stderr);
        return -1;
    }
    zip_directory(argv[1], argv[2]);
    return 0;
}