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

   1 /* readconfig.c -- base routine to read nmh configuration files
   2  *              -- such as nmh profile, context file, or mhn.defaults.
   3  *
   4  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   5  * COPYRIGHT file in the root directory of the nmh distribution for
   6  * complete copyright information.
   7  */
   8
   9 #include <h/mh.h>
  10 #include "error.h"
  11 #include <h/utils.h>
  12
  13 struct procstr {
  14     char *procname;
  15     char **procnaddr;
  16 };
  17
  18 static struct procstr procs[] = {
  19     { "context",       &context },
  20     { "mh-sequences",  &mh_seq },
  21     { "buildmimeproc", &buildmimeproc },
  22     { "fileproc",      &fileproc },
  23     { "formatproc",    &formatproc },
  24     { "incproc",       &incproc },
  25     { "lproc",         &lproc },
  26     { "mailproc",      &mailproc },
  27     { "mhlproc",       &mhlproc },
  28     { "moreproc",      &moreproc },
  29     { "packproc",      &packproc },
  30     { "postproc",      &postproc },
  31     { "rmmproc",       &rmmproc },
  32     { "sendproc",      &sendproc },
  33     { "showmimeproc",  &showmimeproc },
  34     { "showproc",      &showproc },
  35     { "whatnowproc",   &whatnowproc },
  36     { "whomproc",      &whomproc },
  37     { NULL,            NULL }
  38 };
  39
  40 static struct node **opp = NULL;
  41
  42
  43 void
  44 readconfig (struct node **npp, FILE *ib, const char *file, int ctx)
  45 {
  46     int state;
  47     char *cp;
  48     char name[NAMESZ], field[NMH_BUFSIZ];
  49     struct node *np;
  50     struct procstr *ps;
  51     m_getfld_state_t gstate;
  52
  53     if (npp == NULL && (npp = opp) == NULL) {
  54         inform("bug: readconfig called but pump not primed, continuing...");
  55         return;
  56     }
  57
  58     gstate = m_getfld_state_init(ib);
  59     for (;;) {
  60         int fieldsz = sizeof field;
  61         switch (state = m_getfld2(&gstate, name, field, &fieldsz)) {
  62             case FLD:
  63             case FLDPLUS:
  64                 NEW(np);
  65                 *npp = np;
  66                 *(npp = &np->n_next) = NULL;
  67                 np->n_name = mh_xstrdup(name);
  68                 if (state == FLDPLUS) {
  69                     cp = mh_xstrdup(field);
  70                     while (state == FLDPLUS) {
  71                         fieldsz = sizeof field;
  72                         state = m_getfld2(&gstate, name, field, &fieldsz);
  73                         cp = add (field, cp);
  74                     }
  75                     np->n_field = trimcpy (cp);
  76                     free (cp);
  77                 } else {
  78                     np->n_field = trimcpy (field);
  79                 }
  80                 np->n_context = ctx;
  81
  82                 /*
  83                  * Now scan the list of `procs' and link in the
  84                  * field value to the global variable.
  85                  */
  86                 for (ps = procs; ps->procname; ps++)
  87                     if (strcmp (np->n_name, ps->procname) == 0) {
  88                         *ps->procnaddr = np->n_field;
  89                         break;
  90                     }
  91                 continue;
  92
  93             case BODY:
  94                 die("no blank lines are permitted in %s", file);
  95
  96             case FILEEOF:
  97                 break;
  98
  99             default:
 100                 die("%s is poorly formatted", file);
 101         }
 102         break;
 103     }
 104     m_getfld_state_destroy (&gstate);
 105
 106     /*
 107      * Special handling for the pager processes: lproc and moreproc.
 108      *
 109      * If they are not set by the profile, use the callers $PAGER if
 110      * available, otherwise set them to DEFAULT_PAGER.
 111      */
 112     if (lproc == NULL) {
 113         lproc = getenv("PAGER");
 114         if (lproc == NULL || lproc[0] == '\0')
 115             lproc = DEFAULT_PAGER;
 116     }
 117     if (moreproc == NULL) {
 118         moreproc = getenv("PAGER");
 119         if (moreproc == NULL || moreproc[0] == '\0')
 120             moreproc = DEFAULT_PAGER;
 121     }
 122
 123     if (opp == NULL) {
 124         /* Check for duplicated non-null profile entries.  Except
 125            allow multiple profile entries named "#", because that's
 126            what mh-profile(5) suggests using for comments.
 127
 128            Only do this check on the very first call from
 129            context_read(), when opp is NULL.  That way, entries in
 130            mhn.defaults can be overridden without triggering
 131            warnings.
 132
 133            Note that mhn.defaults, $MHN, $MHBUILD, $MHSHOW, and
 134            $MHSTORE all put their entries into just one list, m_defs,
 135            the same list that the profile uses. */
 136
 137         struct node *np;
 138         for (np = m_defs; np; np = np->n_next) {
 139             /* Yes, this is O(N^2).  The profile should be small enough so
 140                that's not a performance problem. */
 141             if (*np->n_name && strcmp("#", np->n_name)) {
 142                 struct node *np2;
 143                 for (np2 = np->n_next; np2; np2 = np2->n_next) {
 144                     if (! strcasecmp (np->n_name, np2->n_name)) {
 145                         inform("multiple \"%s\" profile components in %s, "
 146                             "ignoring \"%s\", continuing...",
 147                             np->n_name, defpath, np2->n_field);
 148                     }
 149                 }
 150             }
 151         }
 152     }
 153
 154     opp = npp;
 155 }
 156
 157
 158 void
 159 add_profile_entry (const char *key, const char *value)
 160 {
 161     struct node *newnode;
 162
 163     /* This inserts the new node at the beginning of m_defs because
 164        that doesn't require traversing it or checking to see if it's
 165        empty. */
 166     NEW(newnode);
 167     newnode->n_name = getcpy (key);
 168     newnode->n_field = getcpy (value);
 169     newnode->n_context = 0;
 170     newnode->n_next = m_defs;
 171     m_defs = newnode;
 172 }