Android系统file_contexts二进制与文本转换工具

#ifdef _WIN32
#define __USE_MINGW_ANSI_STDIO 1
#endif #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#ifdef HAS_STDINT_H
#include <stdint.h>
#endif
#ifdef unix
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#else
#include <direct.h>
#include <io.h>
#endif #define MAGIC 0xF97CFF8A #define S_IFMT 00170000
#define S_IFSOCK 0140000
#define S_IFLNK 0120000
#define S_IFREG 0100000
#define S_IFBLK 0060000
#define S_IFDIR 0040000
#define S_IFCHR 0020000
#define S_IFIFO 0010000
#define S_ISUID 0004000
#define S_ISGID 0002000
#define S_ISVTX 0001000 #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) char *mode_to_string(unsigned int mode)
{
if (S_ISBLK(mode))
return "-b";
else if (S_ISCHR(mode))
return "-c";
else if (S_ISDIR(mode))
return "-d";
else if (S_ISFIFO(mode))
return "-p";
else if (S_ISLNK(mode))
return "-l";
else if (S_ISSOCK(mode))
return "-s";
else if (S_ISREG(mode))
return "--";
else
return "";
} int main(int argc, char *argv[])
{
unsigned int selinux_vers;
unsigned int nothing;
unsigned int i;
unsigned int steams;
unsigned int num_of_regex; char steam[];
char src[];
char context[]; FILE *fp = NULL;
FILE *fpout = NULL; if (argc != ) {
printf("usage: %s BINARY_FILE OUTPUT_TEXT_FILE\n", argv[]);
printf("e.g: %s file_contexts.bin file_contexts\n", argv[]);
return ;
} if ((fp = fopen(argv[], "rb")) == NULL) {
printf("Unable to open %s : ", argv[]);
perror("");
return ;
}
fread(&nothing, , , fp);
if (nothing != MAGIC) {
printf("%s is not a binary!\n", argv[]);
if (fp) fclose(fp);
return ;
} fread(&nothing, , , fp);
selinux_vers = nothing;
fread(&nothing, , , fp);
fseek(fp, (unsigned int)ftell(fp) + nothing, SEEK_SET); fread(&nothing, , , fp);
//printf("num of steams: 0x%x\n", nothing); for (i=; i<nothing; ++i) {
fread(&steams, , , fp);
fread(steam, , steams+, fp);
//printf("%s\n", steam);
} fread(&num_of_regex, , , fp);
//printf("num of regex: 0x%x\n", num_of_regex); if ((fpout = fopen(argv[], "wb")) == NULL) {
printf("unable to open %s for write!\n", argv[]);
if (fp) fclose(fp);
return ;
} //printf("selinux version: %d\n", selinux_vers);
fprintf(fpout, "#context version %d\n", selinux_vers); for (i=; i<num_of_regex; ++i) {
fread(&nothing, , , fp);
fread(context, , nothing, fp);
fread(&nothing, , , fp);
fread(src, , nothing, fp);
//printf("%s %s\n", src, context);
fread(&nothing, , , fp);
fprintf(fpout, "%s\t%s\t%s\n", src, mode_to_string(nothing), context);
fseek(fp, (unsigned int)ftell(fp) + , SEEK_SET);
fread(&nothing, , , fp);
fseek(fp, (unsigned int)ftell(fp) + nothing, SEEK_SET);
fread(&nothing, , , fp);
fread(&nothing, , , fp);
fseek(fp, (unsigned int)ftell(fp) + nothing - , SEEK_SET);
} if (fp) fclose(fp);
if (fpout) fclose(fpout); return ;
}