41 lines
744 B
C
41 lines
744 B
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <termios.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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char *getpass(const char *prompt)
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{
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int fd;
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struct termios s, t;
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ssize_t l;
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static char password[128];
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if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) return 0;
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tcgetattr(fd, &t);
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s = t;
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t.c_lflag &= ~(ECHO|ISIG);
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t.c_lflag |= ICANON;
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t.c_iflag &= ~(INLCR|IGNCR);
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t.c_iflag |= ICRNL;
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tcsetattr(fd, TCSAFLUSH, &t);
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tcdrain(fd);
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dprintf(fd, "%s", prompt);
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l = read(fd, password, sizeof password);
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if (l >= 0) {
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if (l > 0 && password[l-1] == '\n' || l==sizeof password) l--;
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password[l] = 0;
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}
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tcsetattr(fd, TCSAFLUSH, &s);
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dprintf(fd, "\n");
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close(fd);
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return l<0 ? 0 : password;
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}
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