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Commit | Line | Data |
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1c1af145 | 1 | /* |
2 | * PuTTY miscellaneous Unix stuff | |
3 | */ | |
4 | ||
5 | #include <fcntl.h> | |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <assert.h> | |
9 | #include <unistd.h> | |
10 | #include <sys/time.h> | |
11 | #include <sys/types.h> | |
12 | #include <pwd.h> | |
13 | ||
14 | #include "putty.h" | |
15 | ||
16 | long tickcount_offset = 0; | |
17 | ||
18 | unsigned long getticks(void) | |
19 | { | |
20 | struct timeval tv; | |
21 | gettimeofday(&tv, NULL); | |
22 | /* | |
23 | * We want to use milliseconds rather than microseconds, | |
24 | * because we need a decent number of them to fit into a 32-bit | |
25 | * word so it can be used for keepalives. | |
26 | */ | |
27 | return tv.tv_sec * 1000 + tv.tv_usec / 1000 + tickcount_offset; | |
28 | } | |
29 | ||
30 | Filename filename_from_str(const char *str) | |
31 | { | |
32 | Filename ret; | |
33 | strncpy(ret.path, str, sizeof(ret.path)); | |
34 | ret.path[sizeof(ret.path)-1] = '\0'; | |
35 | return ret; | |
36 | } | |
37 | ||
38 | const char *filename_to_str(const Filename *fn) | |
39 | { | |
40 | return fn->path; | |
41 | } | |
42 | ||
43 | int filename_equal(Filename f1, Filename f2) | |
44 | { | |
45 | return !strcmp(f1.path, f2.path); | |
46 | } | |
47 | ||
48 | int filename_is_null(Filename fn) | |
49 | { | |
50 | return !*fn.path; | |
51 | } | |
52 | ||
53 | #ifdef DEBUG | |
54 | static FILE *debug_fp = NULL; | |
55 | ||
56 | void dputs(char *buf) | |
57 | { | |
58 | if (!debug_fp) { | |
59 | debug_fp = fopen("debug.log", "w"); | |
60 | } | |
61 | ||
62 | write(1, buf, strlen(buf)); | |
63 | ||
64 | fputs(buf, debug_fp); | |
65 | fflush(debug_fp); | |
66 | } | |
67 | #endif | |
68 | ||
69 | char *get_username(void) | |
70 | { | |
71 | struct passwd *p; | |
72 | uid_t uid = getuid(); | |
73 | char *user, *ret = NULL; | |
74 | ||
75 | /* | |
76 | * First, find who we think we are using getlogin. If this | |
77 | * agrees with our uid, we'll go along with it. This should | |
78 | * allow sharing of uids between several login names whilst | |
79 | * coping correctly with people who have su'ed. | |
80 | */ | |
81 | user = getlogin(); | |
82 | setpwent(); | |
83 | if (user) | |
84 | p = getpwnam(user); | |
85 | else | |
86 | p = NULL; | |
87 | if (p && p->pw_uid == uid) { | |
88 | /* | |
89 | * The result of getlogin() really does correspond to | |
90 | * our uid. Fine. | |
91 | */ | |
92 | ret = user; | |
93 | } else { | |
94 | /* | |
95 | * If that didn't work, for whatever reason, we'll do | |
96 | * the simpler version: look up our uid in the password | |
97 | * file and map it straight to a name. | |
98 | */ | |
99 | p = getpwuid(uid); | |
100 | if (!p) | |
101 | return NULL; | |
102 | ret = p->pw_name; | |
103 | } | |
104 | endpwent(); | |
105 | ||
106 | return dupstr(ret); | |
107 | } | |
108 | ||
109 | /* | |
110 | * Display the fingerprints of the PGP Master Keys to the user. | |
111 | * (This is here rather than in uxcons because it's appropriate even for | |
112 | * Unix GUI apps.) | |
113 | */ | |
114 | void pgp_fingerprints(void) | |
115 | { | |
116 | fputs("These are the fingerprints of the PuTTY PGP Master Keys. They can\n" | |
117 | "be used to establish a trust path from this executable to another\n" | |
118 | "one. See the manual for more information.\n" | |
119 | "(Note: these fingerprints have nothing to do with SSH!)\n" | |
120 | "\n" | |
121 | "PuTTY Master Key (RSA), 1024-bit:\n" | |
122 | " " PGP_RSA_MASTER_KEY_FP "\n" | |
123 | "PuTTY Master Key (DSA), 1024-bit:\n" | |
124 | " " PGP_DSA_MASTER_KEY_FP "\n", stdout); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Set FD_CLOEXEC on a file descriptor | |
129 | */ | |
130 | int cloexec(int fd) { | |
131 | int fdflags; | |
132 | ||
133 | fdflags = fcntl(fd, F_GETFD); | |
134 | if (fdflags == -1) return -1; | |
135 | return fcntl(fd, F_SETFD, fdflags | FD_CLOEXEC); | |
136 | } | |
137 | ||
138 | FILE *f_open(struct Filename filename, char const *mode, int is_private) | |
139 | { | |
140 | if (!is_private) { | |
141 | return fopen(filename.path, mode); | |
142 | } else { | |
143 | int fd; | |
144 | assert(mode[0] == 'w'); /* is_private is meaningless for read, | |
145 | and tricky for append */ | |
146 | fd = open(filename.path, O_WRONLY | O_CREAT | O_TRUNC, | |
147 | 0700); | |
148 | if (fd < 0) | |
149 | return NULL; | |
150 | return fdopen(fd, mode); | |
151 | } | |
152 | } |