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1 | /* |
2 | * PuTTY miscellaneous Unix stuff |
3 | */ |
4 | |
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5 | #include <fcntl.h> |
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6 | #include <stdio.h> |
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7 | #include <stdlib.h> |
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8 | #include <assert.h> |
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9 | #include <unistd.h> |
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10 | #include <sys/time.h> |
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11 | #include <sys/types.h> |
12 | #include <pwd.h> |
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13 | |
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14 | #include "putty.h" |
15 | |
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16 | unsigned long getticks(void) |
17 | { |
18 | struct timeval tv; |
19 | gettimeofday(&tv, NULL); |
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20 | /* |
21 | * We want to use milliseconds rather than microseconds, |
22 | * because we need a decent number of them to fit into a 32-bit |
23 | * word so it can be used for keepalives. |
24 | */ |
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25 | return tv.tv_sec * TICKSPERSEC + tv.tv_usec / (1000000 / TICKSPERSEC); |
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26 | } |
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27 | |
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28 | Filename *filename_from_str(const char *str) |
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29 | { |
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30 | Filename *ret = snew(Filename); |
31 | ret->path = dupstr(str); |
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32 | return ret; |
33 | } |
34 | |
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35 | Filename *filename_copy(const Filename *fn) |
36 | { |
37 | return filename_from_str(fn->path); |
38 | } |
39 | |
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40 | const char *filename_to_str(const Filename *fn) |
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41 | { |
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42 | return fn->path; |
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43 | } |
44 | |
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45 | int filename_equal(const Filename *f1, const Filename *f2) |
46 | { |
47 | return !strcmp(f1->path, f2->path); |
48 | } |
49 | |
50 | int filename_is_null(const Filename *fn) |
51 | { |
52 | return !fn->path[0]; |
53 | } |
54 | |
55 | void filename_free(Filename *fn) |
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56 | { |
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57 | sfree(fn->path); |
58 | sfree(fn); |
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59 | } |
60 | |
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61 | int filename_serialise(const Filename *f, void *vdata) |
62 | { |
63 | char *data = (char *)vdata; |
64 | int len = strlen(f->path) + 1; /* include trailing NUL */ |
65 | if (data) { |
66 | strcpy(data, f->path); |
67 | } |
68 | return len; |
69 | } |
70 | Filename *filename_deserialise(void *vdata, int maxsize, int *used) |
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71 | { |
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72 | char *data = (char *)vdata; |
73 | char *end; |
74 | end = memchr(data, '\0', maxsize); |
75 | if (!end) |
76 | return NULL; |
77 | end++; |
78 | *used = end - data; |
79 | return filename_from_str(data); |
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80 | } |
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81 | |
82 | #ifdef DEBUG |
83 | static FILE *debug_fp = NULL; |
84 | |
85 | void dputs(char *buf) |
86 | { |
87 | if (!debug_fp) { |
88 | debug_fp = fopen("debug.log", "w"); |
89 | } |
90 | |
91 | write(1, buf, strlen(buf)); |
92 | |
93 | fputs(buf, debug_fp); |
94 | fflush(debug_fp); |
95 | } |
96 | #endif |
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97 | |
98 | char *get_username(void) |
99 | { |
100 | struct passwd *p; |
101 | uid_t uid = getuid(); |
102 | char *user, *ret = NULL; |
103 | |
104 | /* |
105 | * First, find who we think we are using getlogin. If this |
106 | * agrees with our uid, we'll go along with it. This should |
107 | * allow sharing of uids between several login names whilst |
108 | * coping correctly with people who have su'ed. |
109 | */ |
110 | user = getlogin(); |
111 | setpwent(); |
112 | if (user) |
113 | p = getpwnam(user); |
114 | else |
115 | p = NULL; |
116 | if (p && p->pw_uid == uid) { |
117 | /* |
118 | * The result of getlogin() really does correspond to |
119 | * our uid. Fine. |
120 | */ |
121 | ret = user; |
122 | } else { |
123 | /* |
124 | * If that didn't work, for whatever reason, we'll do |
125 | * the simpler version: look up our uid in the password |
126 | * file and map it straight to a name. |
127 | */ |
128 | p = getpwuid(uid); |
129 | if (!p) |
130 | return NULL; |
131 | ret = p->pw_name; |
132 | } |
133 | endpwent(); |
134 | |
135 | return dupstr(ret); |
136 | } |
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137 | |
138 | /* |
139 | * Display the fingerprints of the PGP Master Keys to the user. |
140 | * (This is here rather than in uxcons because it's appropriate even for |
141 | * Unix GUI apps.) |
142 | */ |
143 | void pgp_fingerprints(void) |
144 | { |
145 | fputs("These are the fingerprints of the PuTTY PGP Master Keys. They can\n" |
146 | "be used to establish a trust path from this executable to another\n" |
147 | "one. See the manual for more information.\n" |
148 | "(Note: these fingerprints have nothing to do with SSH!)\n" |
149 | "\n" |
150 | "PuTTY Master Key (RSA), 1024-bit:\n" |
151 | " " PGP_RSA_MASTER_KEY_FP "\n" |
152 | "PuTTY Master Key (DSA), 1024-bit:\n" |
153 | " " PGP_DSA_MASTER_KEY_FP "\n", stdout); |
154 | } |
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155 | |
156 | /* |
157 | * Set FD_CLOEXEC on a file descriptor |
158 | */ |
159 | int cloexec(int fd) { |
160 | int fdflags; |
161 | |
162 | fdflags = fcntl(fd, F_GETFD); |
163 | if (fdflags == -1) return -1; |
164 | return fcntl(fd, F_SETFD, fdflags | FD_CLOEXEC); |
165 | } |
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166 | |
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167 | FILE *f_open(const Filename *filename, char const *mode, int is_private) |
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168 | { |
169 | if (!is_private) { |
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170 | return fopen(filename->path, mode); |
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171 | } else { |
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172 | int fd; |
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173 | assert(mode[0] == 'w'); /* is_private is meaningless for read, |
174 | and tricky for append */ |
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175 | fd = open(filename->path, O_WRONLY | O_CREAT | O_TRUNC, 0600); |
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176 | if (fd < 0) |
177 | return NULL; |
178 | return fdopen(fd, mode); |
179 | } |
180 | } |
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181 | |
182 | FontSpec *fontspec_new(const char *name) |
183 | { |
184 | FontSpec *f = snew(FontSpec); |
185 | f->name = dupstr(name); |
186 | return f; |
187 | } |
188 | FontSpec *fontspec_copy(const FontSpec *f) |
189 | { |
190 | return fontspec_new(f->name); |
191 | } |
192 | void fontspec_free(FontSpec *f) |
193 | { |
194 | sfree(f->name); |
195 | sfree(f); |
196 | } |
197 | int fontspec_serialise(FontSpec *f, void *data) |
198 | { |
199 | int len = strlen(f->name); |
200 | if (data) |
201 | strcpy(data, f->name); |
202 | return len + 1; /* include trailing NUL */ |
203 | } |
204 | FontSpec *fontspec_deserialise(void *vdata, int maxsize, int *used) |
205 | { |
206 | char *data = (char *)vdata; |
207 | char *end = memchr(data, '\0', maxsize); |
208 | if (!end) |
209 | return NULL; |
210 | *used = end - data + 1; |
211 | return fontspec_new(data); |
212 | } |