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secret.c
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secret.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXLINE 100
// read line from stdin
int getL(char **charbufer) {
char c;
char *ptr, *ptr2;
int n = 0;
int curSize = MAXLINE;
ptr = malloc(MAXLINE*sizeof(char));
if (ptr == NULL) {
return n;
}
while ((c = getchar()) != EOF && c != '\n') {
if (n == curSize-2) {
ptr2 = realloc(ptr, curSize + MAXLINE);
if (ptr2 == NULL) {
ptr[n] = '\0';
*charbufer = ptr;
return n;
}
else {
ptr = ptr2;
curSize += MAXLINE;
}
}
ptr[n++] = c;
}
ptr[n] = '\0';
*charbufer = ptr;
if (c == EOF) {
n = -1;
}
return n;
}
int main() {
char *secret = getenv("HOME");
if (secret == NULL) {
puts("no bash variable");
return 0;
}
char *charbufer;
char *find = NULL;
int n;
while (find == NULL) {
n = getL(&charbufer);
if (n == -1) {
free(charbufer);
break;
}
find = strstr(charbufer, secret);
free(charbufer);
}
return 0;
}