sys/share/pcunix.c

   1 /* NetHack 3.6  pcunix.c        $NHDT-Date: 1432512787 2015/05/25 00:13:07 $  $NHDT-Branch: master $:$NHDT-Revision: 1.34 $ */
   2 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   3 /* NetHack may be freely redistributed.  See license for details. */
   4
   5 /* This file collects some Unix dependencies; pager.c contains some more */
   6
   7 #include "hack.h"
   8 #include "wintty.h"
   9
  10 #include <sys/stat.h>
  11 #if defined(WIN32) || defined(MSDOS)
  12 #include <errno.h>
  13 #endif
  14
  15 #if defined(WIN32) || defined(MSDOS)
  16 extern char orgdir[];
  17 #ifdef WIN32
  18 extern void NDECL(backsp);
  19 #endif
  20 extern void NDECL(clear_screen);
  21 #endif
  22
  23 #if 0
  24 static struct stat buf;
  25 #endif
  26
  27 #ifdef WANT_GETHDATE
  28 static struct stat hbuf;
  29 #endif
  30
  31 #ifdef PC_LOCKING
  32 static int NDECL(eraseoldlocks);
  33 #endif
  34
  35 #if 0
  36 int
  37 uptodate(fd)
  38 int fd;
  39 {
  40 #ifdef WANT_GETHDATE
  41     if(fstat(fd, &buf)) {
  42         pline("Cannot get status of saved level? ");
  43         return(0);
  44     }
  45     if(buf.st_mtime < hbuf.st_mtime) {
  46         pline("Saved level is out of date. ");
  47         return(0);
  48     }
  49 #else
  50 #if (defined(MICRO) || defined(WIN32)) && !defined(NO_FSTAT)
  51     if(fstat(fd, &buf)) {
  52         if(moves > 1) pline("Cannot get status of saved level? ");
  53         else pline("Cannot get status of saved game.");
  54         return(0);
  55     }
  56     if(comp_times(buf.st_mtime)) {
  57         if(moves > 1) pline("Saved level is out of date.");
  58         else pline("Saved game is out of date. ");
  59         /* This problem occurs enough times we need to give the player
  60          * some more information about what causes it, and how to fix.
  61          */
  62 #ifdef MSDOS
  63             pline("Make sure that your system's date and time are correct.");
  64             pline("They must be more current than NetHack.EXE's date/time stamp.");
  65 #endif /* MSDOS */
  66         return(0);
  67     }
  68 #endif /* MICRO */
  69 #endif /* WANT_GETHDATE */
  70     return(1);
  71 }
  72 #endif
  73
  74 #ifdef PC_LOCKING
  75 static int
  76 eraseoldlocks()
  77 {
  78     register int i;
  79
  80     /* cannot use maxledgerno() here, because we need to find a lock name
  81      * before starting everything (including the dungeon initialization
  82      * that sets astral_level, needed for maxledgerno()) up
  83      */
  84     for (i = 1; i <= MAXDUNGEON * MAXLEVEL + 1; i++) {
  85         /* try to remove all */
  86         set_levelfile_name(lock, i);
  87         (void) unlink(fqname(lock, LEVELPREFIX, 0));
  88     }
  89     set_levelfile_name(lock, 0);
  90 #ifdef HOLD_LOCKFILE_OPEN
  91     really_close();
  92 #endif
  93     if (unlink(fqname(lock, LEVELPREFIX, 0)))
  94         return 0; /* cannot remove it */
  95     return (1);   /* success! */
  96 }
  97
  98 void
  99 getlock()
 100 {
 101     register int fd, c, ci, ct, ern;
 102     int fcmask = FCMASK;
 103     char tbuf[BUFSZ];
 104     const char *fq_lock;
 105 #if defined(MSDOS) && defined(NO_TERMS)
 106     int grmode = iflags.grmode;
 107 #endif
 108     /* we ignore QUIT and INT at this point */
 109     if (!lock_file(HLOCK, LOCKPREFIX, 10)) {
 110         wait_synch();
 111 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 112         chdirx(orgdir, 0);
 113 #endif
 114         error("Quitting.");
 115     }
 116
 117     /* regularize(lock); */ /* already done in pcmain */
 118     Sprintf(tbuf, "%s", fqname(lock, LEVELPREFIX, 0));
 119     set_levelfile_name(lock, 0);
 120     fq_lock = fqname(lock, LEVELPREFIX, 1);
 121     if ((fd = open(fq_lock, 0)) == -1) {
 122         if (errno == ENOENT)
 123             goto gotlock; /* no such file */
 124 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 125         chdirx(orgdir, 0);
 126 #endif
 127 #if defined(WIN32) || defined(HOLD_LOCKFILE_OPEN)
 128 #if defined(HOLD_LOCKFILE_OPEN)
 129         if (errno == EACCES) {
 130 #define OOPS_BUFSZ 512
 131             char oops[OOPS_BUFSZ];
 132             Strcpy(
 133                 oops,
 134                 "\nThere are files from a game in progress under your name.");
 135             Strcat(oops, "\nThe files are locked or inaccessible.");
 136             Strcat(oops, " Is the other game still running?\n");
 137             if (strlen(fq_lock) < ((OOPS_BUFSZ - 16) - strlen(oops)))
 138                 Sprintf(eos(oops), "Cannot open %s", fq_lock);
 139             Strcat(oops, "\n");
 140             unlock_file(HLOCK);
 141             error(oops);
 142         } else
 143 #endif
 144             error("Bad directory or name: %s\n%s\n", fq_lock,
 145                   strerror(errno));
 146 #else
 147         perror(fq_lock);
 148 #endif
 149         unlock_file(HLOCK);
 150         error("Cannot open %s", fq_lock);
 151     }
 152
 153     (void) nhclose(fd);
 154
 155     if (iflags.window_inited) {
 156 #ifdef SELF_RECOVER
 157         c = yn("There are files from a game in progress under your name. "
 158                "Recover?");
 159 #else
 160         pline("There is already a game in progress under your name.");
 161         pline("You may be able to use \"recover %s\" to get it back.\n",
 162               tbuf);
 163         c = yn("Do you want to destroy the old game?");
 164 #endif
 165     } else {
 166 #if defined(MSDOS) && defined(NO_TERMS)
 167         grmode = iflags.grmode;
 168         if (grmode)
 169             gr_finish();
 170 #endif
 171         c = 'n';
 172         ct = 0;
 173 #ifdef SELF_RECOVER
 174         msmsg("There are files from a game in progress under your name. "
 175               "Recover? [yn]");
 176 #else
 177         msmsg("\nThere is already a game in progress under your name.\n");
 178         msmsg("If this is unexpected, you may be able to use \n");
 179         msmsg("\"recover %s\" to get it back.", tbuf);
 180         msmsg("\nDo you want to destroy the old game? [yn] ");
 181 #endif
 182         while ((ci = nhgetch()) != '\n') {
 183             if (ct > 0) {
 184                 msmsg("\b \b");
 185                 ct = 0;
 186                 c = 'n';
 187             }
 188             if (ci == 'y' || ci == 'n' || ci == 'Y' || ci == 'N') {
 189                 ct = 1;
 190                 c = ci;
 191                 msmsg("%c", c);
 192             }
 193         }
 194     }
 195     if (c == 'y' || c == 'Y')
 196 #ifndef SELF_RECOVER
 197         if (eraseoldlocks()) {
 198 #if defined(WIN32)
 199             if (!strncmpi(windowprocs.name, "tty", 3))
 200                 clear_screen(); /* display gets fouled up otherwise */
 201 #endif
 202             goto gotlock;
 203         } else {
 204             unlock_file(HLOCK);
 205 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 206             chdirx(orgdir, 0);
 207 #endif
 208             error("Couldn't destroy old game.");
 209         }
 210 #else /*SELF_RECOVER*/
 211         if (recover_savefile()) {
 212 #if defined(WIN32)
 213             if (!strncmpi(windowprocs.name, "tty", 3))
 214                 clear_screen(); /* display gets fouled up otherwise */
 215 #endif
 216             goto gotlock;
 217         } else {
 218             unlock_file(HLOCK);
 219 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 220             chdirx(orgdir, 0);
 221 #endif
 222             error("Couldn't recover old game.");
 223         }
 224 #endif /*SELF_RECOVER*/
 225     else {
 226         unlock_file(HLOCK);
 227 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 228         chdirx(orgdir, 0);
 229 #endif
 230         error("%s", "Cannot start a new game.");
 231     }
 232
 233 gotlock:
 234     fd = creat(fq_lock, fcmask);
 235     if (fd == -1)
 236         ern = errno;
 237     unlock_file(HLOCK);
 238     if (fd == -1) {
 239 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 240         chdirx(orgdir, 0);
 241 #endif
 242 #if defined(WIN32)
 243         error("cannot creat file (%s.)\n%s\n%s\"%s\" exists?\n", fq_lock,
 244               strerror(ern), " Are you sure that the directory",
 245               fqn_prefix[LEVELPREFIX]);
 246 #else
 247         error("cannot creat file (%s.)", fq_lock);
 248 #endif
 249     } else {
 250         if (write(fd, (char *) &hackpid, sizeof(hackpid))
 251             != sizeof(hackpid)) {
 252 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 253             chdirx(orgdir, 0);
 254 #endif
 255             error("cannot write lock (%s)", fq_lock);
 256         }
 257         if (nhclose(fd) == -1) {
 258 #if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
 259             chdirx(orgdir, 0);
 260 #endif
 261             error("cannot close lock (%s)", fq_lock);
 262         }
 263     }
 264 #if defined(MSDOS) && defined(NO_TERMS)
 265     if (grmode)
 266         gr_init();
 267 #endif
 268 }
 269 #endif /* PC_LOCKING */
 270
 271 #ifndef WIN32
 272 void
 273 regularize(s)
 274 /*
 275  * normalize file name - we don't like .'s, /'s, spaces, and
 276  * lots of other things
 277  */
 278 register char *s;
 279 {
 280     register char *lp;
 281
 282     for (lp = s; *lp; lp++)
 283         if (*lp <= ' ' || *lp == '"' || (*lp >= '*' && *lp <= ',')
 284             || *lp == '.' || *lp == '/' || (*lp >= ':' && *lp <= '?') ||
 285 #ifdef OS2
 286             *lp == '&' || *lp == '(' || *lp == ')' ||
 287 #endif
 288             *lp == '|' || *lp >= 127 || (*lp >= '[' && *lp <= ']'))
 289             *lp = '_';
 290 }
 291 #endif /* WIN32 */
 292
 293 #ifdef __EMX__
 294 void
 295 seteuid(int i)
 296 {
 297     ;
 298 }
 299 #endif