mirror of
https://github.com/deater/dos33fsprogs.git
synced 2025-10-31 09:16:03 +00:00
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
#include <stdio.h>
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#include <sys/stat.h> /* struct stat */
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#include <stdlib.h> /* exit() */
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#include <fcntl.h> /* open() */
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#include <unistd.h> /* close() */
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#include "version.h"
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int main(int argc, char **argv) {
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int in_fd,out_fd,offset,write_result;
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unsigned char buffer[256];
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int result,file_size;
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struct stat file_info;
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if (argc!=4) {
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printf("MAKE_B version %s\b",VERSION);
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printf(" Usage: %s in_file out_file offset\n\n",argv[0]);
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printf("\tin_file : input file\n");
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printf("\tout_file : output file\n");
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printf("\toffset : offset which file should be loaded\n\n");
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exit(1);
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}
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if (stat(argv[1],&file_info)<0) {
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printf("Error! %s not found!\n",argv[1]);
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exit(2);
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}
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file_size=(int)file_info.st_size;
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if ((in_fd=open(argv[1],O_RDONLY))<0) {
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printf("Error opening %s!\n",argv[1]);
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exit(3);
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}
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if ((out_fd=open(argv[2],O_WRONLY|O_CREAT,0666))<0) {
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printf("Error opening %s\n",argv[2]);
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exit(4);
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}
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offset=strtol(argv[3],NULL,0);
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buffer[0]=offset&0xff;
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buffer[1]=(offset>>8)&0xff;
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buffer[2]=file_size&0xff;
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buffer[3]=(file_size>>8)&0xff;
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write_result=write(out_fd,&buffer,4);
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while( (result=read(in_fd,&buffer,256))>0) {
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write_result=write(out_fd,&buffer,result);
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}
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if (write_result<0) fprintf(stderr,"Error writing\n");
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close(in_fd);
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close(out_fd);
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return 0;
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}
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