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

   1
   2 /*
   3  * context_foil.c -- foil search of profile and context
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13 #include <h/utils.h>
  14
  15 /*
  16  * Foil search of users .mh_profile
  17  * If error, return -1, else return 0
  18  */
  19
  20 int
  21 context_foil (char *path)
  22 {
  23     register struct node *np;
  24
  25     /* In fact, nobody examines defpath in code paths where
  26      * it's been set by us -- the uses in the source tree are:
  27      *  1 sbr/context_read.c uses it only after setting it itself
  28      *  2 uip/install_mh.c uses it only after setting it itself
  29      *  3 uip/mshcmds.c and uip/mark.c print it if given the -debug switch
  30      * A worthwhile piece of code cleanup would be to make 1 and
  31      * 2 use a local variable and just delete 3.
  32      *
  33      * Similarly, context and ctxpath are not really used
  34      * outside the context_* routines. It might be worth combining
  35      * them into one file so the variables can be made static.
  36      */
  37
  38     /* We set context to NULL to indicate that no context file
  39      * is to be read. (Using /dev/null doesn't work because we
  40      * would try to lock it, which causes timeouts with some
  41      * locking methods.)
  42      */
  43     defpath = context = NULL;
  44
  45     /*
  46      * If path is given, create a minimal profile/context list
  47      */
  48     if (path) {
  49         m_defs = (struct node *) mh_xmalloc (sizeof(*np));
  50
  51         np = m_defs;
  52         if (!(np->n_name = strdup ("Path"))) {
  53             advise (NULL, "strdup failed");
  54             return -1;
  55         }
  56         if (!(np->n_field = strdup (path))) {
  57             advise (NULL, "strdup failed");
  58             return -1;
  59         }
  60         np->n_context = 0;
  61         np->n_next = NULL;
  62
  63         if (mypath == NULL && (mypath = getenv ("HOME")) != NULL)
  64             if (!(mypath = strdup (mypath))) {
  65                 advise (NULL, "strdup failed");
  66                 return -1;
  67             }
  68     }
  69
  70     return 0;
  71 }
  72