db2/os/os_tmpdir.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 1998
   5  *      Sleepycat Software.  All rights reserved.
   6  */
   7
   8 #include "config.h"
   9
  10 #ifndef lint
  11 static const char sccsid[] = "@(#)os_tmpdir.c   10.3 (Sleepycat) 10/13/98";
  12 #endif /* not lint */
  13
  14 #ifndef NO_SYSTEM_INCLUDES
  15 #include <sys/types.h>
  16
  17 #include <errno.h>
  18 #include <stdlib.h>
  19 #endif
  20
  21 #include "db_int.h"
  22 #include "common_ext.h"
  23
  24 #ifdef macintosh
  25 #include <TFileSpec.h>
  26 #endif
  27
  28 /*
  29  * __os_tmpdir --
  30  *      Set the temporary directory path.
  31  *
  32  * The order of items in the list structure and the order of checks in
  33  * the environment are documented.
  34  *
  35  * PUBLIC: int __os_tmpdir __P((DB_ENV *, u_int32_t));
  36  */
  37 int
  38 __os_tmpdir(dbenv, flags)
  39         DB_ENV *dbenv;
  40         u_int32_t flags;
  41 {
  42         /*
  43          * !!!
  44          * Don't change this to:
  45          *
  46          *      static const char * const list[]
  47          *
  48          * because it creates a text relocation in position independent code.
  49          */
  50         static const char * list[] = {
  51                 "/var/tmp",
  52                 "/usr/tmp",
  53                 "/temp",                /* Windows. */
  54                 "/tmp",
  55                 "C:/temp",              /* Windows. */
  56                 "C:/tmp",               /* Windows. */
  57                 NULL
  58         };
  59         const char * const *lp, *p;
  60
  61         /* Use the environment if it's permitted and initialized. */
  62         p = NULL;
  63 #ifdef HAVE_GETEUID
  64         if (LF_ISSET(DB_USE_ENVIRON) ||
  65             (LF_ISSET(DB_USE_ENVIRON_ROOT) && getuid() == 0))
  66 #else
  67         if (LF_ISSET(DB_USE_ENVIRON))
  68 #endif
  69         {
  70                 if ((p = getenv("TMPDIR")) != NULL && p[0] == '\0') {
  71                         __db_err(dbenv, "illegal TMPDIR environment variable");
  72                         return (EINVAL);
  73                 }
  74                 /* Windows */
  75                 if (p == NULL && (p = getenv("TEMP")) != NULL && p[0] == '\0') {
  76                         __db_err(dbenv, "illegal TEMP environment variable");
  77                         return (EINVAL);
  78                 }
  79                 /* Windows */
  80                 if (p == NULL && (p = getenv("TMP")) != NULL && p[0] == '\0') {
  81                         __db_err(dbenv, "illegal TMP environment variable");
  82                         return (EINVAL);
  83                 }
  84                 /* Macintosh */
  85                 if (p == NULL &&
  86                     (p = getenv("TempFolder")) != NULL && p[0] == '\0') {
  87                         __db_err(dbenv,
  88                             "illegal TempFolder environment variable");
  89                         return (EINVAL);
  90                 }
  91         }
  92
  93 #ifdef macintosh
  94         /* Get the path to the temporary folder. */
  95         if (p == NULL) {
  96                 FSSpec spec;
  97
  98                 if (!Special2FSSpec(kTemporaryFolderType,
  99                     kOnSystemDisk, 0, &spec))
 100                         (void)__os_strdup(FSp2FullPath(&spec), &p);
 101         }
 102 #endif
 103
 104         /* Step through the list looking for a possibility. */
 105         if (p == NULL)
 106                 for (lp = list; *lp != NULL; ++lp)
 107                         if (__os_exists(p = *lp, NULL) == 0)
 108                                 break;
 109         if (p == NULL)
 110                 return (0);
 111
 112         return (__os_strdup(p, &dbenv->db_tmp_dir));
 113 }