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