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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int stat(const char *file_name, struct stat *buf);
int syntax(void)
{
printf("syntax:\n");
printf(" pad padnum filename\n");
return(0);
}
int main(int argc, char **argv)
{
FILE *fp;
long int i=0L, padsize=0L;
unsigned char data=0xff;
struct stat fileinfo;
if(argc<3){
syntax();
exit(1);
}
if((fp=fopen(argv[2],"a"))==NULL){
printf("error opening %s.\n",argv[2]);
exit(1);
}
if(stat(argv[2],&fileinfo)!=0){
printf("error in stat of %s.\n",argv[2]);
exit(1);
}
padsize = strtol(argv[1],NULL,10) - fileinfo.st_size;
for(i=0;i<padsize;i++){
fwrite(&data,1,1,fp);
}
fclose(fp);
return(0);
}
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