mdw@git.distorted.org.uk Git - sgt/putty/blob - unix/uxmisc.c

   1 /*
   2  * PuTTY miscellaneous Unix stuff
   3  */
   4
   5 #include <stdio.h>
   6 #include <unistd.h>
   7 #include <time.h>
   8 #include <sys/time.h>
   9 #include <sys/types.h>
  10 #include <pwd.h>
  11
  12 #include "putty.h"
  13
  14 /*
  15  * We want to use milliseconds rather than microseconds or nanoseconds,
  16  * because we need a decent number of them to fit into a 32-bit
  17  * word so it can be used for keepalives.
  18  */
  19 unsigned long getticks(void)
  20 {
  21     struct timeval tv;
  22 #ifdef CLOCK_MONOTONIC
  23     struct timespec ts;
  24     if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
  25             return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
  26 #endif
  27     gettimeofday(&tv, NULL);
  28     return tv.tv_sec * 1000 + tv.tv_usec / 1000;
  29 }
  30
  31 Filename filename_from_str(const char *str)
  32 {
  33     Filename ret;
  34     strncpy(ret.path, str, sizeof(ret.path));
  35     ret.path[sizeof(ret.path)-1] = '\0';
  36     return ret;
  37 }
  38
  39 const char *filename_to_str(const Filename *fn)
  40 {
  41     return fn->path;
  42 }
  43
  44 int filename_equal(Filename f1, Filename f2)
  45 {
  46     return !strcmp(f1.path, f2.path);
  47 }
  48
  49 int filename_is_null(Filename fn)
  50 {
  51     return !*fn.path;
  52 }
  53
  54 #ifdef DEBUG
  55 static FILE *debug_fp = NULL;
  56
  57 void dputs(char *buf)
  58 {
  59     if (!debug_fp) {
  60         debug_fp = fopen("debug.log", "w");
  61     }
  62
  63     write(1, buf, strlen(buf));
  64
  65     fputs(buf, debug_fp);
  66     fflush(debug_fp);
  67 }
  68 #endif
  69
  70 char *get_username(void)
  71 {
  72     struct passwd *p;
  73     uid_t uid = getuid();
  74     char *user, *ret = NULL;
  75
  76     /*
  77      * First, find who we think we are using getlogin. If this
  78      * agrees with our uid, we'll go along with it. This should
  79      * allow sharing of uids between several login names whilst
  80      * coping correctly with people who have su'ed.
  81      */
  82     user = getlogin();
  83     setpwent();
  84     if (user)
  85         p = getpwnam(user);
  86     else
  87         p = NULL;
  88     if (p && p->pw_uid == uid) {
  89         /*
  90          * The result of getlogin() really does correspond to
  91          * our uid. Fine.
  92          */
  93         ret = user;
  94     } else {
  95         /*
  96          * If that didn't work, for whatever reason, we'll do
  97          * the simpler version: look up our uid in the password
  98          * file and map it straight to a name.
  99          */
 100         p = getpwuid(uid);
 101         if (!p)
 102             return NULL;
 103         ret = p->pw_name;
 104     }
 105     endpwent();
 106
 107     return dupstr(ret);
 108 }
 109
 110 /*
 111  * Display the fingerprints of the PGP Master Keys to the user.
 112  * (This is here rather than in uxcons because it's appropriate even for
 113  * Unix GUI apps.)
 114  */
 115 void pgp_fingerprints(void)
 116 {
 117     fputs("These are the fingerprints of the PuTTY PGP Master Keys. They can\n"
 118           "be used to establish a trust path from this executable to another\n"
 119           "one. See the manual for more information.\n"
 120           "(Note: these fingerprints have nothing to do with SSH!)\n"
 121           "\n"
 122           "PuTTY Master Key (RSA), 1024-bit:\n"
 123           "  " PGP_RSA_MASTER_KEY_FP "\n"
 124           "PuTTY Master Key (DSA), 1024-bit:\n"
 125           "  " PGP_DSA_MASTER_KEY_FP "\n", stdout);
 126 }