/*
-
-readpass.c
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
-
-Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
-
-Created: Mon Jul 10 22:08:59 1995 ylo
-
-Functions for reading passphrases and passwords.
-
-*/
+ *
+ * readpass.c
+ *
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ *
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * Created: Mon Jul 10 22:08:59 1995 ylo
+ *
+ * Functions for reading passphrases and passwords.
+ *
+ */
#include "includes.h"
RCSID("$Id$");
static struct termios saved_tio;
/* Old interrupt signal handler for read_passphrase. */
-static void (*old_handler)(int sig) = NULL;
+static void (*old_handler) (int sig) = NULL;
/* Interrupt signal handler for read_passphrase. */
-void intr_handler(int sig)
+void
+intr_handler(int sig)
{
- /* Restore terminal modes. */
- tcsetattr(fileno(stdin), TCSANOW, &saved_tio);
- /* Restore the old signal handler. */
- signal(sig, old_handler);
- /* Resend the signal, with the old handler. */
- kill(getpid(), sig);
+ /* Restore terminal modes. */
+ tcsetattr(fileno(stdin), TCSANOW, &saved_tio);
+ /* Restore the old signal handler. */
+ signal(sig, old_handler);
+ /* Resend the signal, with the old handler. */
+ kill(getpid(), sig);
}
-/* Reads a passphrase from /dev/tty with echo turned off. Returns the
- passphrase (allocated with xmalloc). Exits if EOF is encountered.
+/* Reads a passphrase from /dev/tty with echo turned off. Returns the
+ passphrase (allocated with xmalloc). Exits if EOF is encountered.
The passphrase if read from stdin if from_stdin is true (as is the
case with ssh-keygen). */
-char *read_passphrase(const char *prompt, int from_stdin)
+char *
+read_passphrase(const char *prompt, int from_stdin)
{
- char buf[1024], *cp;
- struct termios tio;
- FILE *f;
-
- if (from_stdin)
- f = stdin;
- else
- {
- /* Read the passphrase from /dev/tty to make it possible to ask it even
- when stdin has been redirected. */
- f = fopen("/dev/tty", "r");
- if (!f)
- {
- /* No controlling terminal and no DISPLAY. Nowhere to read. */
- fprintf(stderr, "You have no controlling tty and no DISPLAY. Cannot read passphrase.\n");
- exit(1);
+ char buf[1024], *cp;
+ struct termios tio;
+ FILE *f;
+
+ if (from_stdin)
+ f = stdin;
+ else {
+ /* Read the passphrase from /dev/tty to make it possible
+ to ask it even when stdin has been redirected. */
+ f = fopen("/dev/tty", "r");
+ if (!f) {
+ /* No controlling terminal and no DISPLAY. Nowhere to read. */
+ fprintf(stderr, "You have no controlling tty and no DISPLAY. Cannot read passphrase.\n");
+ exit(1);
+ }
}
- }
-
- /* Display the prompt (on stderr because stdout might be redirected). */
- fflush(stdout);
- fprintf(stderr, "%s", prompt);
- fflush(stderr);
-
- /* Get terminal modes. */
- tcgetattr(fileno(f), &tio);
- saved_tio = tio;
- /* Save signal handler and set the new handler. */
- old_handler = signal(SIGINT, intr_handler);
- /* Set new terminal modes disabling all echo. */
- tio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
- tcsetattr(fileno(f), TCSANOW, &tio);
-
- /* Read the passphrase from the terminal. */
- if (fgets(buf, sizeof(buf), f) == NULL)
- {
- /* Got EOF. Just exit. */
- /* Restore terminal modes. */
- tcsetattr(fileno(f), TCSANOW, &saved_tio);
- /* Restore the signal handler. */
- signal(SIGINT, old_handler);
- /* Print a newline (the prompt probably didn\'t have one). */
- fprintf(stderr, "\n");
- /* Close the file. */
- if (f != stdin)
- fclose(f);
- exit(1);
- }
- /* Restore terminal modes. */
- tcsetattr(fileno(f), TCSANOW, &saved_tio);
- /* Restore the signal handler. */
- (void)signal(SIGINT, old_handler);
- /* Remove newline from the passphrase. */
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
- /* Allocate a copy of the passphrase. */
- cp = xstrdup(buf);
- /* Clear the buffer so we don\'t leave copies of the passphrase laying
- around. */
- memset(buf, 0, sizeof(buf));
- /* Print a newline since the prompt probably didn\'t have one. */
- fprintf(stderr, "\n");
- /* Close the file. */
- if (f != stdin)
- fclose(f);
- return cp;
+ /* Display the prompt (on stderr because stdout might be redirected). */
+ fflush(stdout);
+ fprintf(stderr, "%s", prompt);
+ fflush(stderr);
+
+ /* Get terminal modes. */
+ tcgetattr(fileno(f), &tio);
+ saved_tio = tio;
+ /* Save signal handler and set the new handler. */
+ old_handler = signal(SIGINT, intr_handler);
+
+ /* Set new terminal modes disabling all echo. */
+ tio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
+ tcsetattr(fileno(f), TCSANOW, &tio);
+
+ /* Read the passphrase from the terminal. */
+ if (fgets(buf, sizeof(buf), f) == NULL) {
+ /* Got EOF. Just exit. */
+ /* Restore terminal modes. */
+ tcsetattr(fileno(f), TCSANOW, &saved_tio);
+ /* Restore the signal handler. */
+ signal(SIGINT, old_handler);
+ /* Print a newline (the prompt probably didn\'t have one). */
+ fprintf(stderr, "\n");
+ /* Close the file. */
+ if (f != stdin)
+ fclose(f);
+ exit(1);
+ }
+ /* Restore terminal modes. */
+ tcsetattr(fileno(f), TCSANOW, &saved_tio);
+ /* Restore the signal handler. */
+ (void) signal(SIGINT, old_handler);
+ /* Remove newline from the passphrase. */
+ if (strchr(buf, '\n'))
+ *strchr(buf, '\n') = 0;
+ /* Allocate a copy of the passphrase. */
+ cp = xstrdup(buf);
+ /* Clear the buffer so we don\'t leave copies of the passphrase
+ laying around. */
+ memset(buf, 0, sizeof(buf));
+ /* Print a newline since the prompt probably didn\'t have one. */
+ fprintf(stderr, "\n");
+ /* Close the file. */
+ if (f != stdin)
+ fclose(f);
+ return cp;
}
andersk / openssh.git / blobdiff