| 1 | /* |
| 2 | * Copyright 1990 - 1995, Julianne Frances Haugh |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of Julianne F. Haugh nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "t_defines.h" |
| 31 | #ifdef _WIN32 |
| 32 | #include <windows.h> |
| 33 | #include <io.h> |
| 34 | #endif /* _WIN32 */ |
| 35 | #ifdef HAVE_UNISTD_H |
| 36 | #include <unistd.h> |
| 37 | #endif /* HAVE_UNISTD_H */ |
| 38 | #include <signal.h> |
| 39 | #include <stdio.h> |
| 40 | |
| 41 | static int sig_caught; |
| 42 | #ifdef HAVE_SIGACTION |
| 43 | static struct sigaction sigact; |
| 44 | #endif |
| 45 | |
| 46 | /*ARGSUSED*/ |
| 47 | static RETSIGTYPE |
| 48 | sig_catch (sig) |
| 49 | int sig; |
| 50 | { |
| 51 | sig_caught = 1; |
| 52 | } |
| 53 | |
| 54 | _TYPE( int ) |
| 55 | t_getpass (buf, maxlen, prompt) |
| 56 | char *buf; |
| 57 | unsigned maxlen; |
| 58 | const char *prompt; |
| 59 | { |
| 60 | char *cp; |
| 61 | #ifdef _WIN32 |
| 62 | HANDLE handle = (HANDLE) _get_osfhandle(_fileno(stdin)); |
| 63 | DWORD mode; |
| 64 | |
| 65 | GetConsoleMode( handle, &mode ); |
| 66 | SetConsoleMode( handle, mode & ~ENABLE_ECHO_INPUT ); |
| 67 | |
| 68 | if(fputs(prompt, stdout) == EOF || |
| 69 | fgets(buf, maxlen, stdin) == NULL) { |
| 70 | SetConsoleMode(handle,mode); |
| 71 | return -1; |
| 72 | } |
| 73 | cp = buf + strlen(buf) - 1; |
| 74 | if ( *cp == 0x0a ) |
| 75 | *cp = '\0'; |
| 76 | printf("\n"); |
| 77 | SetConsoleMode(handle,mode); |
| 78 | #else |
| 79 | FILE *fp; |
| 80 | int tty_opened = 0; |
| 81 | |
| 82 | #ifdef HAVE_SIGACTION |
| 83 | struct sigaction old_sigact; |
| 84 | #else |
| 85 | RETSIGTYPE (*old_signal)(); |
| 86 | #endif |
| 87 | TERMIO new_modes; |
| 88 | TERMIO old_modes; |
| 89 | |
| 90 | /* |
| 91 | * set a flag so the SIGINT signal can be re-sent if it |
| 92 | * is caught |
| 93 | */ |
| 94 | |
| 95 | sig_caught = 0; |
| 96 | |
| 97 | /* |
| 98 | * if /dev/tty can't be opened, getpass() needs to read |
| 99 | * from stdin instead. |
| 100 | */ |
| 101 | |
| 102 | if ((fp = fopen ("/dev/tty", "r")) == 0) { |
| 103 | fp = stdin; |
| 104 | setbuf (fp, (char *) 0); |
| 105 | } else { |
| 106 | tty_opened = 1; |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * the current tty modes must be saved so they can be |
| 111 | * restored later on. echo will be turned off, except |
| 112 | * for the newline character (BSD has to punt on this) |
| 113 | */ |
| 114 | |
| 115 | if (GTTY (fileno (fp), &new_modes)) |
| 116 | return -1; |
| 117 | |
| 118 | old_modes = new_modes; |
| 119 | |
| 120 | #ifdef HAVE_SIGACTION |
| 121 | sigact.sa_handler = sig_catch; |
| 122 | (void) sigaction (SIGINT, &sigact, &old_sigact); |
| 123 | #else |
| 124 | old_signal = signal (SIGINT, sig_catch); |
| 125 | #endif |
| 126 | |
| 127 | #ifdef USE_SGTTY |
| 128 | new_modes.sg_flags &= ~ECHO; |
| 129 | #else |
| 130 | new_modes.c_iflag &= ~IGNCR; |
| 131 | new_modes.c_iflag |= ICRNL; |
| 132 | new_modes.c_oflag |= OPOST|ONLCR; |
| 133 | new_modes.c_lflag &= ~(ECHO|ECHOE|ECHOK); |
| 134 | new_modes.c_lflag |= ICANON|ECHONL; |
| 135 | #endif |
| 136 | |
| 137 | if (STTY (fileno (fp), &new_modes)) |
| 138 | goto out; |
| 139 | |
| 140 | /* |
| 141 | * the prompt is output, and the response read without |
| 142 | * echoing. the trailing newline must be removed. if |
| 143 | * the fgets() returns an error, a NULL pointer is |
| 144 | * returned. |
| 145 | */ |
| 146 | |
| 147 | if (fputs (prompt, stdout) == EOF) |
| 148 | goto out; |
| 149 | |
| 150 | (void) fflush (stdout); |
| 151 | |
| 152 | if (fgets (buf, maxlen, fp) == buf) { |
| 153 | if ((cp = strchr (buf, '\n'))) |
| 154 | *cp = '\0'; |
| 155 | else |
| 156 | buf[maxlen - 1] = '\0'; |
| 157 | |
| 158 | #ifdef USE_SGTTY |
| 159 | putc ('\n', stdout); |
| 160 | #endif |
| 161 | } |
| 162 | else buf[0] = '\0'; |
| 163 | out: |
| 164 | /* |
| 165 | * the old SIGINT handler is restored after the tty |
| 166 | * modes. then /dev/tty is closed if it was opened in |
| 167 | * the beginning. finally, if a signal was caught it |
| 168 | * is sent to this process for normal processing. |
| 169 | */ |
| 170 | |
| 171 | if (STTY (fileno (fp), &old_modes)) |
| 172 | { memset (buf, 0, maxlen); return -1; } |
| 173 | |
| 174 | #ifdef HAVE_SIGACTION |
| 175 | (void) sigaction (SIGINT, &old_sigact, NULL); |
| 176 | #else |
| 177 | (void) signal (SIGINT, old_signal); |
| 178 | #endif |
| 179 | |
| 180 | if (tty_opened) |
| 181 | (void) fclose (fp); |
| 182 | |
| 183 | if (sig_caught) { |
| 184 | kill (getpid (), SIGINT); |
| 185 | memset (buf, 0, maxlen); |
| 186 | return -1; |
| 187 | } |
| 188 | #endif |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
