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