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