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/*
* A function to read the passphrase either from the terminal or from
* an open file descriptor.
*
* Public domain.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include "c.h"
#include "xgetpass.h"
char *xgetpass(int pfd, const char *prompt)
{
char *pass = NULL;
int len = 0, i;
if (pfd < 0) /* terminal */
return getpass(prompt);
for (i=0; ; i++) {
if (i >= len-1) {
char *tmppass = pass;
len += 128;
pass = realloc(tmppass, len);
if (!pass) {
pass = tmppass; /* the old buffer hasn't changed */
break;
}
}
if (pass && (read(pfd, pass + i, 1) != 1 ||
pass[i] == '\n' || pass[i] == 0))
break;
}
if (pass)
pass[i] = '\0';
return pass;
}
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