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262 lines (215 loc) · 5.66 KB
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/* mz_os_posix.c -- System functions for posix
Version 2.5.2, August 27, 2018
part of the MiniZip project
Copyright (C) 2010-2018 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_GETRANDOM
# include <sys/random.h>
#endif
#if defined unix || defined __APPLE__
# include <unistd.h>
# include <utime.h>
# define HAVE_ARC4RANDOM_BUF
#endif
#if defined(HAVE_LIBBSD) && \
!defined(MZ_ZIP_NO_COMPRESSION) && \
!defined(MZ_ZIP_NO_ENCRYPTION)
# include <bsd/stdlib.h> // arc4random_buf
#else
# include <stdlib.h>
#endif
#include "mz.h"
#include "mz_strm.h"
#include "mz_os.h"
#include "mz_os_posix.h"
/***************************************************************************/
#if !defined(MZ_ZIP_NO_COMPRESSION) && !defined(MZ_ZIP_NO_ENCRYPTION)
#if defined(HAVE_ARC4RANDOM_BUF)
int32_t mz_posix_rand(uint8_t *buf, int32_t size)
{
arc4random_buf(buf, size);
return size;
}
#elif defined(HAVE_ARC4RANDOM)
int32_t mz_posix_rand(uint8_t *buf, int32_t size)
{
int32_t left = size;
for (; left > 2; left -= 3, buf += 3)
{
uint32_t val = arc4random();
buf[0] = (val) & 0xFF;
buf[1] = (val >> 8) & 0xFF;
buf[2] = (val >> 16) & 0xFF;
}
for (; left > 0; left--, buf++)
{
*buf = arc4random() & 0xFF;
}
return size - left;
}
#elif defined(HAVE_GETRANDOM)
int32_t mz_posix_rand(uint8_t *buf, int32_t size)
{
int32_t left = size;
int32_t written = 0;
while (left > 0)
{
written = getrandom(buf, left, 0);
if (written < 0)
return MZ_INTERNAL_ERROR;
buf += written;
left -= written;
}
return size - left;
}
#else
#if !defined(FORCE_LOWQUALITY_ENTROPY)
# error "Low quality entropy function used for encryption"
#endif
int32_t mz_posix_rand(uint8_t *buf, int32_t size)
{
static unsigned calls = 0;
int32_t i = 0;
// Ensure different random header each time
if (++calls == 1)
{
#define PI_SEED 3141592654UL
srand((unsigned)(time(NULL) ^ PI_SEED));
}
while (i < size)
buf[i++] = (rand() >> 7) & 0xff;
return size;
}
#endif
#endif
int32_t mz_posix_rename(const char *source_path, const char *target_path)
{
if (rename(source_path, target_path) == -1)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_posix_delete(const char *path)
{
if (unlink(path) == -1)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_posix_file_exists(const char *path)
{
struct stat stat_info;
memset(&stat_info, 0, sizeof(stat_info));
if (stat(path, &stat_info) == 0)
return MZ_OK;
return MZ_EXIST_ERROR;
}
int64_t mz_posix_get_file_size(const char *path)
{
struct stat stat_info;
memset(&stat_info, 0, sizeof(stat_info));
if (stat(path, &stat_info) == 0)
return stat_info.st_size;
return 0;
}
int32_t mz_posix_get_file_date(const char *path, time_t *modified_date, time_t *accessed_date, time_t *creation_date)
{
struct stat stat_info;
char *name = NULL;
size_t len = 0;
int32_t err = MZ_INTERNAL_ERROR;
memset(&stat_info, 0, sizeof(stat_info));
if (strcmp(path, "-") != 0)
{
// Not all systems allow stat'ing a file with / appended
len = strlen(path);
name = (char *)malloc(len + 1);
strncpy(name, path, len + 1);
name[len] = 0;
if (name[len - 1] == '/')
name[len - 1] = 0;
if (stat(name, &stat_info) == 0)
{
if (modified_date != NULL)
*modified_date = stat_info.st_mtime;
if (accessed_date != NULL)
*accessed_date = stat_info.st_atime;
// Creation date not supported
if (creation_date != NULL)
*creation_date = 0;
err = MZ_OK;
}
free(name);
}
return err;
}
int32_t mz_posix_set_file_date(const char *path, time_t modified_date, time_t accessed_date, time_t creation_date)
{
struct utimbuf ut;
ut.actime = accessed_date;
ut.modtime = modified_date;
// Creation date not supported
(void)creation_date;
if (utime(path, &ut) != 0)
return MZ_INTERNAL_ERROR;
return MZ_OK;
}
int32_t mz_posix_get_file_attribs(const char *path, uint32_t *attributes)
{
struct stat stat_info;
int32_t err = MZ_OK;
memset(&stat_info, 0, sizeof(stat_info));
if (stat(path, &stat_info) == -1)
err = MZ_INTERNAL_ERROR;
*attributes = stat_info.st_mode;
return err;
}
int32_t mz_posix_set_file_attribs(const char *path, uint32_t attributes)
{
int32_t err = MZ_OK;
if (chmod(path, (mode_t)attributes) == -1)
err = MZ_INTERNAL_ERROR;
return err;
}
int32_t mz_posix_make_dir(const char *path)
{
int32_t err = 0;
err = mkdir(path, 0755);
if (err != 0 && errno != EEXIST)
return MZ_INTERNAL_ERROR;
return MZ_OK;
}
DIR* mz_posix_open_dir(const char *path)
{
return opendir(path);
}
struct dirent* mz_posix_read_dir(DIR *dir)
{
if (dir == NULL)
return NULL;
return readdir(dir);
}
int32_t mz_posix_close_dir(DIR *dir)
{
if (dir == NULL)
return MZ_PARAM_ERROR;
if (closedir(dir) == -1)
return MZ_INTERNAL_ERROR;
return MZ_OK;
}
int32_t mz_posix_is_dir(const char *path)
{
struct stat path_stat;
stat(path, &path_stat);
if (S_ISDIR(path_stat.st_mode))
return MZ_OK;
return MZ_EXIST_ERROR;
}