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created UTIL_chmod()

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protecting "/dev/null" from having its permissions changed.

also : minor : improved consistency of util.h API
This commit is contained in:
Yann Collet
2019-11-25 13:45:22 -08:00
parent 60db21a677
commit 9a22140ef4
4 changed files with 58 additions and 57 deletions
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42
programs/util.h
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@ -30,12 +30,12 @@ extern "C" {
# include <io.h> /* _chmod */
#else
# include <unistd.h> /* chown, stat */
#if PLATFORM_POSIX_VERSION < 200809L
# include <utime.h> /* utime */
#else
# include <fcntl.h> /* AT_FDCWD */
# include <sys/stat.h> /* utimensat */
#endif
# if PLATFORM_POSIX_VERSION < 200809L
# include <utime.h> /* utime */
# else
# include <fcntl.h> /* AT_FDCWD */
# include <sys/stat.h> /* utimensat */
# endif
#endif
#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */
#include "mem.h" /* U32, U64 */
@ -85,12 +85,6 @@ extern "C" {
#endif
/*-*************************************
* Constants
***************************************/
#define LIST_SIZE_INCREASE (8*1024)
/*-****************************************
* Compiler specifics
******************************************/
@ -120,7 +114,6 @@ extern int g_utilDisplayLevel;
* File functions
******************************************/
#if defined(_MSC_VER)
#define chmod _chmod
typedef struct __stat64 stat_t;
#else
typedef struct stat stat_t;
@ -129,30 +122,29 @@ extern int g_utilDisplayLevel;
int UTIL_fileExist(const char* filename);
int UTIL_isRegularFile(const char* infilename);
int UTIL_setFileStat(const char* filename, stat_t* statbuf);
U32 UTIL_isDirectory(const char* infilename);
int UTIL_getFileStat(const char* infilename, stat_t* statbuf);
int UTIL_isDirectory(const char* infilename);
int UTIL_isSameFile(const char* file1, const char* file2);
int UTIL_compareStr(const void *p1, const void *p2);
int UTIL_isCompressedFile(const char* infilename, const char *extensionList[]);
const char* UTIL_getFileExtension(const char* infilename);
int UTIL_isLink(const char* infilename);
int UTIL_isFIFO(const char* infilename);
#ifndef _MSC_VER
U32 UTIL_isFIFO(const char* infilename);
#endif
U32 UTIL_isLink(const char* infilename);
#define UTIL_FILESIZE_UNKNOWN ((U64)(-1))
U64 UTIL_getFileSize(const char* infilename);
U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles);
int UTIL_getFileStat(const char* infilename, stat_t* statbuf);
int UTIL_setFileStat(const char* filename, stat_t* statbuf);
int UTIL_chmod(char const* filename, mode_t permissions); /*< like chmod, but avoid changing permission of /dev/null */
int UTIL_compareStr(const void *p1, const void *p2);
const char* UTIL_getFileExtension(const char* infilename);
/*
* A modified version of realloc().
* If UTIL_realloc() fails the original block is freed.
*/
UTIL_STATIC void* UTIL_realloc(void *ptr, size_t size)
UTIL_STATIC void* UTIL_realloc(void* ptr, size_t size)
{
void *newptr = realloc(ptr, size);
void* const newptr = realloc(ptr, size);
if (newptr) return newptr;
free(ptr);
return NULL;