c-ipfs/test/test_helper.c

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#include <dirent.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
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#include "ipfs/repo/init.h"
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#include "ipfs/repo/fsrepo/fs_repo.h"
#include "ipfs/core/daemon.h"
#include "libp2p/os/utils.h"
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int cp(const char *to, const char *from)
{
int fd_to, fd_from;
char buf[4096];
ssize_t nread;
int saved_errno;
fd_from = open(from, O_RDONLY);
if (fd_from < 0)
return -1;
fd_to = open(to, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd_to < 0)
goto out_error;
while (nread = read(fd_from, buf, sizeof buf), nread > 0)
{
char *out_ptr = buf;
ssize_t nwritten;
do {
nwritten = write(fd_to, out_ptr, nread);
if (nwritten >= 0)
{
nread -= nwritten;
out_ptr += nwritten;
}
else if (errno != EINTR)
{
goto out_error;
}
} while (nread > 0);
}
if (nread == 0)
{
if (close(fd_to) < 0)
{
fd_to = -1;
goto out_error;
}
close(fd_from);
/* Success! */
return 0;
}
out_error:
saved_errno = errno;
close(fd_from);
if (fd_to >= 0)
close(fd_to);
errno = saved_errno;
return -1;
}
/***
* Helper to create a test file in the OS
*/
int create_file(const char* fileName, unsigned char* bytes, size_t num_bytes) {
FILE* file = fopen(fileName, "wb");
fwrite(bytes, num_bytes, 1, file);
fclose(file);
return 1;
}
/***
* Create a buffer with some data
*/
int create_bytes(unsigned char* buffer, size_t num_bytes) {
int counter = 0;
for(int i = 0; i < num_bytes; i++) {
buffer[i] = counter++;
if (counter > 15)
counter = 0;
}
return 1;
}
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/***
* Remove a directory and everything in it
* @param path the directory to remove
* @returns true(1) on success, otherwise false(0)
*/
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int remove_directory(const char *path)
{
DIR *d = opendir(path);
size_t path_len = strlen(path);
int r = -1;
if (d)
{
struct dirent *p;
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r = 1;
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while (r && (p=readdir(d)))
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{
int r2 = -1;
char *buf;
size_t len;
/* Skip the names "." and ".." as we don't want to recurse on them. */
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, ".."))
{
continue;
}
len = path_len + strlen(p->d_name) + 2;
buf = malloc(len);
if (buf)
{
struct stat statbuf;
snprintf(buf, len, "%s/%s", path, p->d_name);
if (!stat(buf, &statbuf))
{
if (S_ISDIR(statbuf.st_mode))
{
r2 = remove_directory(buf);
}
else
{
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r2 = !unlink(buf);
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}
}
free(buf);
}
r = r2;
}
closedir(d);
}
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if (r)
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{
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r = !rmdir(path);
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}
return r;
}
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/***
* Drop a repository by removing the directory
*/
int drop_repository(const char* path) {
if (os_utils_file_exists(path)) {
return remove_directory(path);
}
return 1;
}
/**
* drops and builds a repository at the specified path
* @param path the path
* @param swarm_port the port that the swarm should run on
* @param bootstrap_peers a vector of fellow peers as MultiAddresses, can be NULL
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* @param peer_id a place to store the generated peer id
* @returns true(1) on success, otherwise false(0)
*/
int drop_and_build_repository(const char* path, int swarm_port, struct Libp2pVector* bootstrap_peers, char **peer_id) {
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if (os_utils_file_exists(path)) {
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if (!drop_repository(path)) {
return 0;
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}
}
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mkdir(path, S_IRWXU);
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return make_ipfs_repository(path, swarm_port, bootstrap_peers, peer_id);
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}
/***
* Drop a repository and build a new one with the specified config file
* @param path where to create it
* @param fs_repo the results
* @param config_file_to_copy where to find the config file to copy
* @returns true(1) on success, otherwise false(0)
*/
int drop_build_open_repo(const char* path, struct FSRepo** fs_repo, const char* config_filename_to_copy) {
if (!drop_and_build_repository(path, 4001, NULL, NULL))
return 0;
if (config_filename_to_copy != NULL) {
// attach config filename to path
char *config = (char*) malloc(strlen(path) + 8);
strcpy(config, path);
// erase slash if there is one
if (config[strlen(path)-1] == '/')
config[strlen(path)-1] = 0;
strcat(config, "/config");
// delete the old
if (unlink(config) != 0) {
free(config);
return 0;
}
// copy pre-built config file into directory
if (cp(config, config_filename_to_copy) < 0) {
fprintf(stderr, "Unable to copy %s to %s. Error number %d.\n", config_filename_to_copy, config, errno);
free(config);
return 0;
}
free(config);
}
if (!ipfs_repo_fsrepo_new(path, NULL, fs_repo))
return 0;
if (!ipfs_repo_fsrepo_open(*fs_repo)) {
free(*fs_repo);
*fs_repo = NULL;
return 0;
}
return 1;
}
/***
* Drop a repository and build a new one
* @param path where to create it
* @param fs_repo the results
* @returns true(1) on success, otherwise false(0)
*/
int drop_build_and_open_repo(const char* path, struct FSRepo** fs_repo) {
return drop_build_open_repo(path, fs_repo, NULL);
}
/***
* Start a daemon (usefull in a separate thread)
* @param arg a char string of the repo path
* @returns NULL
*/
void* test_daemon_start(void* arg) {
ipfs_daemon_start((char*)arg);
return NULL;
}