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

46 lines
864 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;
short int i;
off_t l;
char tst[256];
size_t n=1,m=1;
memset(tst,0,256);
if(argc!=4){
printf("erreur : %s <file_name> <32-bit int in Hex> <Offset in Hex>\n",argv[0]);
exit(-1);
}
fird=open(argv[1],O_CREAT|O_WRONLY,0600);
if(fird==-1){
perror("On ne peut pas ouvrir cela en O_RDONLY");
exit(1);
}
ent = strtol(argv[3],NULL,16);
l=lseek(fird,ent*4,SEEK_SET);
printf("%ld\n",l);
if(l==-1){
perror("erreur dans lseek");
exit(2);
}
ents = strtol(argv[2],NULL,16);
write(fird,&ents,4);
close(fird);
return EXIT_SUCCESS;
}