diplodocus.org Git - nmh/blob - sbr/context_foil.c

   1
   2 /*
   3  * context_foil.c -- foil search of profile and context
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/utils.h>
  12
  13 /*
  14  * Foil search of users .mh_profile
  15  * If error, return -1, else return 0
  16  */
  17
  18 int
  19 context_foil (char *path)
  20 {
  21     register struct node *np;
  22
  23     /* In fact, nobody examines defpath in code paths where
  24      * it's been set by us -- the uses in the source tree are:
  25      *  1 sbr/context_read.c uses it only after setting it itself
  26      *  2 uip/install_mh.c uses it only after setting it itself
  27      *  3 uip/mshcmds.c and uip/mark.c print it if given the -debug switch
  28      * A worthwhile piece of code cleanup would be to make 1 and
  29      * 2 use a local variable and just delete 3.
  30      *
  31      * Similarly, context and ctxpath are not really used
  32      * outside the context_* routines. It might be worth combining
  33      * them into one file so the variables can be made static.
  34      */
  35
  36     /* We set context to NULL to indicate that no context file
  37      * is to be read. (Using /dev/null doesn't work because we
  38      * would try to lock it, which causes timeouts with some
  39      * locking methods.)
  40      */
  41     defpath = context = NULL;
  42
  43     /*
  44      * If path is given, create a minimal profile/context list
  45      */
  46     if (path) {
  47         m_defs = (struct node *) mh_xmalloc (sizeof(*np));
  48
  49         np = m_defs;
  50         if (!(np->n_name = strdup ("Path"))) {
  51             advise (NULL, "strdup failed");
  52             return -1;
  53         }
  54         if (!(np->n_field = strdup (path))) {
  55             advise (NULL, "strdup failed");
  56             return -1;
  57         }
  58         np->n_context = 0;
  59         np->n_next = NULL;
  60
  61         if (mypath == NULL && (mypath = getenv ("HOME")) != NULL)
  62             if (!(mypath = strdup (mypath))) {
  63                 advise (NULL, "strdup failed");
  64                 return -1;
  65             }
  66     }
  67
  68     return 0;
  69 }
  70