APL/APL1.2/SCR1.2/TP11/get_numb.c
2022-01-25 12:47:42 +01:00

40 lines
822 B
C

#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
#include<unistd.h>
#include<string.h>
int main(int argc, char* argv[]) {
int fird,ent,ents;
off_t i;
char tst[256];
size_t n=1,m=1;
memset(tst,0,256);
if(argc!=3){
printf("erreur : %s <Nom Fichier> <offset>\n",argv[0]);
exit(-1);
}
fird=open(argv[1],O_CREAT|O_RDONLY,0600);
if(fird==-1){
perror("On ne peut pas ouvrir cela en O_WRONLY");
exit(1);
}
ent = strtol(argv[2],NULL,10);
lseek(fird,ent*4,SEEK_SET);
i=read(fird,&ents,4);
if(i==0){
printf("Offset is out of range!\n");
exit(1);
}
printf("The number at offset %d is 0x%08x --> %d\n",ent,ents,ents);
close(fird);
return EXIT_SUCCESS;
}