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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) and | |
3 | * geoffrey hing <ghing@net.ohio-state.edu> | |
4 | * Licensed under the GPL | |
5 | */ | |
6 | ||
7 | #include <errno.h> | |
8 | #include <string.h> | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <unistd.h> | |
12 | #include <sys/time.h> | |
13 | #include "init.h" | |
14 | #include "user.h" | |
15 | #include "kern_util.h" | |
16 | #include "os.h" | |
17 | ||
18 | #define TTY_LOG_DIR "./" | |
19 | ||
20 | /* Set early in boot and then unchanged */ | |
21 | static char *tty_log_dir = TTY_LOG_DIR; | |
22 | static int tty_log_fd = -1; | |
23 | ||
24 | #define TTY_LOG_OPEN 1 | |
25 | #define TTY_LOG_CLOSE 2 | |
26 | #define TTY_LOG_WRITE 3 | |
27 | #define TTY_LOG_EXEC 4 | |
28 | ||
29 | #define TTY_READ 1 | |
30 | #define TTY_WRITE 2 | |
31 | ||
32 | struct tty_log_buf { | |
33 | int what; | |
34 | unsigned long tty; | |
35 | int len; | |
36 | int direction; | |
37 | unsigned long sec; | |
38 | unsigned long usec; | |
39 | }; | |
40 | ||
41 | int open_tty_log(void *tty, void *current_tty) | |
42 | { | |
43 | struct timeval tv; | |
44 | struct tty_log_buf data; | |
45 | char buf[strlen(tty_log_dir) + sizeof("01234567890-01234567\0")]; | |
46 | int fd; | |
47 | ||
48 | gettimeofday(&tv, NULL); | |
49 | if(tty_log_fd != -1){ | |
50 | data = ((struct tty_log_buf) { .what = TTY_LOG_OPEN, | |
51 | .tty = (unsigned long) tty, | |
52 | .len = sizeof(current_tty), | |
53 | .direction = 0, | |
54 | .sec = tv.tv_sec, | |
55 | .usec = tv.tv_usec } ); | |
56 | os_write_file(tty_log_fd, &data, sizeof(data)); | |
57 | os_write_file(tty_log_fd, ¤t_tty, data.len); | |
58 | return(tty_log_fd); | |
59 | } | |
60 | ||
61 | sprintf(buf, "%s/%0u-%0u", tty_log_dir, (unsigned int) tv.tv_sec, | |
62 | (unsigned int) tv.tv_usec); | |
63 | ||
64 | fd = os_open_file(buf, of_append(of_create(of_rdwr(OPENFLAGS()))), | |
65 | 0644); | |
66 | if(fd < 0){ | |
67 | printk("open_tty_log : couldn't open '%s', errno = %d\n", | |
68 | buf, -fd); | |
69 | } | |
70 | return(fd); | |
71 | } | |
72 | ||
73 | void close_tty_log(int fd, void *tty) | |
74 | { | |
75 | struct tty_log_buf data; | |
76 | struct timeval tv; | |
77 | ||
78 | if(tty_log_fd != -1){ | |
79 | gettimeofday(&tv, NULL); | |
80 | data = ((struct tty_log_buf) { .what = TTY_LOG_CLOSE, | |
81 | .tty = (unsigned long) tty, | |
82 | .len = 0, | |
83 | .direction = 0, | |
84 | .sec = tv.tv_sec, | |
85 | .usec = tv.tv_usec } ); | |
86 | os_write_file(tty_log_fd, &data, sizeof(data)); | |
87 | return; | |
88 | } | |
89 | os_close_file(fd); | |
90 | } | |
91 | ||
92 | static int log_chunk(int fd, const char *buf, int len) | |
93 | { | |
94 | int total = 0, try, missed, n; | |
95 | char chunk[64]; | |
96 | ||
97 | while(len > 0){ | |
98 | try = (len > sizeof(chunk)) ? sizeof(chunk) : len; | |
99 | missed = copy_from_user_proc(chunk, (char *) buf, try); | |
100 | try -= missed; | |
101 | n = os_write_file(fd, chunk, try); | |
102 | if(n != try) { | |
103 | if(n < 0) | |
104 | return(n); | |
105 | return(-EIO); | |
106 | } | |
107 | if(missed != 0) | |
108 | return(-EFAULT); | |
109 | ||
110 | len -= try; | |
111 | total += try; | |
112 | buf += try; | |
113 | } | |
114 | ||
115 | return(total); | |
116 | } | |
117 | ||
118 | int write_tty_log(int fd, const char *buf, int len, void *tty, int is_read) | |
119 | { | |
120 | struct timeval tv; | |
121 | struct tty_log_buf data; | |
122 | int direction; | |
123 | ||
124 | if(fd == tty_log_fd){ | |
125 | gettimeofday(&tv, NULL); | |
126 | direction = is_read ? TTY_READ : TTY_WRITE; | |
127 | data = ((struct tty_log_buf) { .what = TTY_LOG_WRITE, | |
128 | .tty = (unsigned long) tty, | |
129 | .len = len, | |
130 | .direction = direction, | |
131 | .sec = tv.tv_sec, | |
132 | .usec = tv.tv_usec } ); | |
133 | os_write_file(tty_log_fd, &data, sizeof(data)); | |
134 | } | |
135 | ||
136 | return(log_chunk(fd, buf, len)); | |
137 | } | |
138 | ||
139 | void log_exec(char **argv, void *tty) | |
140 | { | |
141 | struct timeval tv; | |
142 | struct tty_log_buf data; | |
143 | char **ptr,*arg; | |
144 | int len; | |
145 | ||
146 | if(tty_log_fd == -1) return; | |
147 | ||
148 | gettimeofday(&tv, NULL); | |
149 | ||
150 | len = 0; | |
151 | for(ptr = argv; ; ptr++){ | |
152 | if(copy_from_user_proc(&arg, ptr, sizeof(arg))) | |
153 | return; | |
154 | if(arg == NULL) break; | |
155 | len += strlen_user_proc(arg); | |
156 | } | |
157 | ||
158 | data = ((struct tty_log_buf) { .what = TTY_LOG_EXEC, | |
159 | .tty = (unsigned long) tty, | |
160 | .len = len, | |
161 | .direction = 0, | |
162 | .sec = tv.tv_sec, | |
163 | .usec = tv.tv_usec } ); | |
164 | os_write_file(tty_log_fd, &data, sizeof(data)); | |
165 | ||
166 | for(ptr = argv; ; ptr++){ | |
167 | if(copy_from_user_proc(&arg, ptr, sizeof(arg))) | |
168 | return; | |
169 | if(arg == NULL) break; | |
170 | log_chunk(tty_log_fd, arg, strlen_user_proc(arg)); | |
171 | } | |
172 | } | |
173 | ||
174 | extern void register_tty_logger(int (*opener)(void *, void *), | |
175 | int (*writer)(int, const char *, int, | |
176 | void *, int), | |
177 | void (*closer)(int, void *)); | |
178 | ||
179 | static int register_logger(void) | |
180 | { | |
181 | register_tty_logger(open_tty_log, write_tty_log, close_tty_log); | |
182 | return(0); | |
183 | } | |
184 | ||
185 | __uml_initcall(register_logger); | |
186 | ||
187 | static int __init set_tty_log_dir(char *name, int *add) | |
188 | { | |
189 | tty_log_dir = name; | |
190 | return 0; | |
191 | } | |
192 | ||
193 | __uml_setup("tty_log_dir=", set_tty_log_dir, | |
194 | "tty_log_dir=<directory>\n" | |
195 | " This is used to specify the directory where the logs of all pty\n" | |
196 | " data from this UML machine will be written.\n\n" | |
197 | ); | |
198 | ||
199 | static int __init set_tty_log_fd(char *name, int *add) | |
200 | { | |
201 | char *end; | |
202 | ||
203 | tty_log_fd = strtoul(name, &end, 0); | |
204 | if((*end != '\0') || (end == name)){ | |
205 | printf("set_tty_log_fd - strtoul failed on '%s'\n", name); | |
206 | tty_log_fd = -1; | |
207 | } | |
208 | ||
209 | *add = 0; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | __uml_setup("tty_log_fd=", set_tty_log_fd, | |
214 | "tty_log_fd=<fd>\n" | |
215 | " This is used to specify a preconfigured file descriptor to which all\n" | |
216 | " tty data will be written. Preconfigure the descriptor with something\n" | |
217 | " like '10>tty_log tty_log_fd=10'.\n\n" | |
218 | ); | |
219 | ||
220 | ||
221 | /* | |
222 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
223 | * Emacs will notice this stuff at the end of the file and automatically | |
224 | * adjust the settings for this buffer only. This must remain at the end | |
225 | * of the file. | |
226 | * --------------------------------------------------------------------------- | |
227 | * Local variables: | |
228 | * c-file-style: "linux" | |
229 | * End: | |
230 | */ |