diff options
Diffstat (limited to 'cli.c')
-rw-r--r-- | cli.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/cli.c b/cli.c deleted file mode 100644 index 6a5825690..000000000 --- a/cli.c +++ /dev/null | |||
@@ -1,233 +0,0 @@ | |||
1 | /* $OpenBSD: cli.c,v 1.13 2001/05/06 21:23:31 markus Exp $ */ | ||
2 | |||
3 | /* | ||
4 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | ||
5 | * | ||
6 | * Redistribution and use in source and binary forms, with or without | ||
7 | * modification, are permitted provided that the following conditions | ||
8 | * are met: | ||
9 | * 1. Redistributions of source code must retain the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer. | ||
11 | * 2. Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * | ||
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | ||
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | ||
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | ||
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | ||
24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
25 | */ | ||
26 | |||
27 | #include "includes.h" | ||
28 | RCSID("$OpenBSD: cli.c,v 1.13 2001/05/06 21:23:31 markus Exp $"); | ||
29 | |||
30 | #include "xmalloc.h" | ||
31 | #include "log.h" | ||
32 | #include "cli.h" | ||
33 | |||
34 | static int cli_input = -1; | ||
35 | static int cli_output = -1; | ||
36 | static int cli_from_stdin = 0; | ||
37 | |||
38 | sigset_t oset; | ||
39 | sigset_t nset; | ||
40 | struct sigaction nsa; | ||
41 | struct sigaction osa; | ||
42 | struct termios ntio; | ||
43 | struct termios otio; | ||
44 | int echo_modified; | ||
45 | |||
46 | volatile int intr; | ||
47 | |||
48 | static int | ||
49 | cli_open(int from_stdin) | ||
50 | { | ||
51 | if (cli_input >= 0 && cli_output >= 0 && cli_from_stdin == from_stdin) | ||
52 | return 1; | ||
53 | |||
54 | if (from_stdin) { | ||
55 | if (!cli_from_stdin && cli_input >= 0) { | ||
56 | (void)close(cli_input); | ||
57 | } | ||
58 | cli_input = STDIN_FILENO; | ||
59 | cli_output = STDERR_FILENO; | ||
60 | } else { | ||
61 | cli_input = cli_output = open(_PATH_TTY, O_RDWR); | ||
62 | if (cli_input < 0) | ||
63 | fatal("You have no controlling tty. Cannot read passphrase."); | ||
64 | } | ||
65 | |||
66 | cli_from_stdin = from_stdin; | ||
67 | |||
68 | return cli_input >= 0 && cli_output >= 0 && cli_from_stdin == from_stdin; | ||
69 | } | ||
70 | |||
71 | static void | ||
72 | cli_close(void) | ||
73 | { | ||
74 | if (!cli_from_stdin && cli_input >= 0) | ||
75 | close(cli_input); | ||
76 | cli_input = -1; | ||
77 | cli_output = -1; | ||
78 | cli_from_stdin = 0; | ||
79 | return; | ||
80 | } | ||
81 | |||
82 | void | ||
83 | intrcatch(int sig) | ||
84 | { | ||
85 | intr = 1; | ||
86 | } | ||
87 | |||
88 | static void | ||
89 | cli_echo_disable(void) | ||
90 | { | ||
91 | sigemptyset(&nset); | ||
92 | sigaddset(&nset, SIGTSTP); | ||
93 | (void) sigprocmask(SIG_BLOCK, &nset, &oset); | ||
94 | |||
95 | intr = 0; | ||
96 | |||
97 | memset(&nsa, 0, sizeof(nsa)); | ||
98 | nsa.sa_handler = intrcatch; | ||
99 | (void) sigaction(SIGINT, &nsa, &osa); | ||
100 | |||
101 | echo_modified = 0; | ||
102 | if (tcgetattr(cli_input, &otio) == 0 && (otio.c_lflag & ECHO)) { | ||
103 | echo_modified = 1; | ||
104 | ntio = otio; | ||
105 | ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL); | ||
106 | (void) tcsetattr(cli_input, TCSANOW, &ntio); | ||
107 | } | ||
108 | return; | ||
109 | } | ||
110 | |||
111 | static void | ||
112 | cli_echo_restore(void) | ||
113 | { | ||
114 | if (echo_modified != 0) { | ||
115 | tcsetattr(cli_input, TCSANOW, &otio); | ||
116 | echo_modified = 0; | ||
117 | } | ||
118 | |||
119 | (void) sigprocmask(SIG_SETMASK, &oset, NULL); | ||
120 | (void) sigaction(SIGINT, &osa, NULL); | ||
121 | |||
122 | if (intr != 0) { | ||
123 | kill(getpid(), SIGINT); | ||
124 | sigemptyset(&nset); | ||
125 | /* XXX tty has not neccessarily drained by now? */ | ||
126 | sigsuspend(&nset); | ||
127 | intr = 0; | ||
128 | } | ||
129 | return; | ||
130 | } | ||
131 | |||
132 | static int | ||
133 | cli_read(char* buf, int size, int echo) | ||
134 | { | ||
135 | char ch = 0; | ||
136 | int i = 0; | ||
137 | int n; | ||
138 | |||
139 | if (!echo) | ||
140 | cli_echo_disable(); | ||
141 | |||
142 | while (ch != '\n') { | ||
143 | n = read(cli_input, &ch, 1); | ||
144 | if (intr) | ||
145 | break; | ||
146 | if (n == -1 && (errno == EAGAIN || errno == EINTR)) | ||
147 | continue; | ||
148 | if (n != 1) | ||
149 | break; | ||
150 | if (ch == '\n') | ||
151 | break; | ||
152 | if (i < size - 1) | ||
153 | buf[i++] = ch; | ||
154 | } | ||
155 | if (intr) | ||
156 | i = 0; | ||
157 | buf[i] = '\0'; | ||
158 | |||
159 | if (!echo) | ||
160 | cli_echo_restore(); | ||
161 | if (!intr && !echo) | ||
162 | (void) write(cli_output, "\n", 1); | ||
163 | return i; | ||
164 | } | ||
165 | |||
166 | static int | ||
167 | cli_write(const char* buf, int size) | ||
168 | { | ||
169 | int i, len, pos, ret = 0; | ||
170 | char *output, *p; | ||
171 | |||
172 | output = xmalloc(4*size); | ||
173 | for (p = output, i = 0; i < size; i++) { | ||
174 | if (buf[i] == '\n' || buf[i] == '\r') | ||
175 | *p++ = buf[i]; | ||
176 | else | ||
177 | p = vis(p, buf[i], 0, 0); | ||
178 | } | ||
179 | len = p - output; | ||
180 | |||
181 | for (pos = 0; pos < len; pos += ret) { | ||
182 | ret = write(cli_output, output + pos, len - pos); | ||
183 | if (ret == -1) { | ||
184 | xfree(output); | ||
185 | return -1; | ||
186 | } | ||
187 | } | ||
188 | xfree(output); | ||
189 | return 0; | ||
190 | } | ||
191 | |||
192 | /* | ||
193 | * Presents a prompt and returns the response allocated with xmalloc(). | ||
194 | * Uses /dev/tty or stdin/out depending on arg. Optionally disables echo | ||
195 | * of response depending on arg. Tries to ensure that no other userland | ||
196 | * buffer is storing the response. | ||
197 | */ | ||
198 | char* | ||
199 | cli_read_passphrase(const char* prompt, int from_stdin, int echo_enable) | ||
200 | { | ||
201 | char buf[BUFSIZ]; | ||
202 | char* p; | ||
203 | |||
204 | if (!cli_open(from_stdin)) | ||
205 | fatal("Cannot read passphrase."); | ||
206 | |||
207 | fflush(stdout); | ||
208 | |||
209 | cli_write(prompt, strlen(prompt)); | ||
210 | cli_read(buf, sizeof buf, echo_enable); | ||
211 | |||
212 | cli_close(); | ||
213 | |||
214 | p = xstrdup(buf); | ||
215 | memset(buf, 0, sizeof(buf)); | ||
216 | return (p); | ||
217 | } | ||
218 | |||
219 | char* | ||
220 | cli_prompt(char* prompt, int echo_enable) | ||
221 | { | ||
222 | return cli_read_passphrase(prompt, 0, echo_enable); | ||
223 | } | ||
224 | |||
225 | void | ||
226 | cli_mesg(char* mesg) | ||
227 | { | ||
228 | cli_open(0); | ||
229 | cli_write(mesg, strlen(mesg)); | ||
230 | cli_write("\n", strlen("\n")); | ||
231 | cli_close(); | ||
232 | return; | ||
233 | } | ||