usr/src/cmd/sendmail/db/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 #pragma ident   "%Z%%M% %I%     %E% SMI"
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "@(#)os_tmpdir.c   10.3 (Sleepycat) 10/13/98";
  14 #endif /* not lint */
  15
  16 #ifndef NO_SYSTEM_INCLUDES
  17 #include <sys/types.h>
  18
  19 #include <errno.h>
  20 #include <stdlib.h>
  21 #endif
  22
  23 #include "db_int.h"
  24 #include "common_ext.h"
  25
  26 #ifdef macintosh
  27 #include <TFileSpec.h>
  28 #endif
  29
  30 /*
  31  * __os_tmpdir --
  32  *      Set the temporary directory path.
  33  *
  34  * The order of items in the list structure and the order of checks in
  35  * the environment are documented.
  36  *
  37  * PUBLIC: int __os_tmpdir __P((DB_ENV *, u_int32_t));
  38  */
  39 int
  40 __os_tmpdir(dbenv, flags)
  41         DB_ENV *dbenv;
  42         u_int32_t flags;
  43 {
  44         /*
  45          * !!!
  46          * Don't change this to:
  47          *
  48          *      static const char * const list[]
  49          *
  50          * because it creates a text relocation in position independent code.
  51          */
  52         static const char * list[] = {
  53                 "/var/tmp",
  54                 "/usr/tmp",
  55                 "/temp",                /* Windows. */
  56                 "/tmp",
  57                 "C:/temp",              /* Windows. */
  58                 "C:/tmp",               /* Windows. */
  59                 NULL
  60         };
  61         const char * const *lp, *p;
  62
  63         /* Use the environment if it's permitted and initialized. */
  64         p = NULL;
  65 #ifdef HAVE_GETEUID
  66         if (LF_ISSET(DB_USE_ENVIRON) ||
  67             (LF_ISSET(DB_USE_ENVIRON_ROOT) && getuid() == 0))
  68 #else
  69         if (LF_ISSET(DB_USE_ENVIRON))
  70 #endif
  71         {
  72                 if ((p = getenv("TMPDIR")) != NULL && p[0] == '\0') {
  73                         __db_err(dbenv, "illegal TMPDIR environment variable");
  74                         return (EINVAL);
  75                 }
  76                 /* Windows */
  77                 if (p == NULL && (p = getenv("TEMP")) != NULL && p[0] == '\0') {
  78                         __db_err(dbenv, "illegal TEMP environment variable");
  79                         return (EINVAL);
  80                 }
  81                 /* Windows */
  82                 if (p == NULL && (p = getenv("TMP")) != NULL && p[0] == '\0') {
  83                         __db_err(dbenv, "illegal TMP environment variable");
  84                         return (EINVAL);
  85                 }
  86                 /* Macintosh */
  87                 if (p == NULL &&
  88                     (p = getenv("TempFolder")) != NULL && p[0] == '\0') {
  89                         __db_err(dbenv,
  90                             "illegal TempFolder environment variable");
  91                         return (EINVAL);
  92                 }
  93         }
  94
  95 #ifdef macintosh
  96         /* Get the path to the temporary folder. */
  97         if (p == NULL) {
  98                 FSSpec spec;
  99
 100                 if (!Special2FSSpec(kTemporaryFolderType,
 101                     kOnSystemDisk, 0, &spec))
 102                         (void)__os_strdup(FSp2FullPath(&spec), &p);
 103         }
 104 #endif
 105
 106         /* Step through the list looking for a possibility. */
 107         if (p == NULL)
 108                 for (lp = list; *lp != NULL; ++lp)
 109                         if (__os_exists(p = *lp, NULL) == 0)
 110                                 break;
 111         if (p == NULL)
 112                 return (0);
 113
 114         return (__os_strdup(p, &dbenv->db_tmp_dir));
 115 }