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#include <resource.h>
/* ... */
struct rlimit limit;

limit.rlim_cur = 0;
limit.rlim_max = 0;
if(!setrlimit(RLIMIT_CORE, &limit)) {
    /* Handle Error */
}

if(mlock(pwd, MAX_PWD_LEN) != 0) {
    /* deal withHandle error */
}

/* Create or otherwise obtain some sensitive data */
fgets(secret, sizeof(secret), stdin);

#include <resource.h>
/* ... */
struct rlimit limit;

limit.rlim_cur = 0;
limit.rlim_max = 0;
if(!setrlimit(RLIMIT_CORE, &limit)) {
    /* Handle Error */
}

if(VirtualLock(pwd, MAX_PWD_LEN) != 0) {
    /* deal withHandle error */
}

/* Create or otherwise obtain some sensitive data */
fgets(secret, sizeof(secret), stdin);