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 "trimcpy.h"
  11 #include "getcpy.h"
  12 #include "readconfig.h"
  13 #include "error.h"
  14 #include "h/utils.h"
  15
  16 struct procstr {
  17     char *procname;
  18     char **procnaddr;
  19 };
  20
  21 static struct procstr procs[] = {
  22     { "context",       &context },
  23     { "mh-sequences",  &mh_seq },
  24     { "buildmimeproc", &buildmimeproc },
  25     { "fileproc",      &fileproc },
  26     { "formatproc",    &formatproc },
  27     { "incproc",       &incproc },
  28     { "lproc",         &lproc },
  29     { "mailproc",      &mailproc },
  30     { "mhlproc",       &mhlproc },
  31     { "moreproc",      &moreproc },
  32     { "packproc",      &packproc },
  33     { "postproc",      &postproc },
  34     { "rmmproc",       &rmmproc },
  35     { "sendproc",      &sendproc },
  36     { "showmimeproc",  &showmimeproc },
  37     { "showproc",      &showproc },
  38     { "whatnowproc",   &whatnowproc },
  39     { "whomproc",      &whomproc },
  40     { NULL,            NULL }
  41 };
  42
  43 static struct node **opp = NULL;
  44
  45
  46 void
  47 readconfig (struct node **npp, FILE *ib, const char *file, int ctx)
  48 {
  49     int state;
  50     char *cp;
  51     char name[NAMESZ], field[NMH_BUFSIZ];
  52     struct node *np;
  53     struct procstr *ps;
  54     m_getfld_state_t gstate;
  55
  56     if (npp == NULL && (npp = opp) == NULL) {
  57         inform("bug: readconfig called but pump not primed, continuing...");
  58         return;
  59     }
  60
  61     gstate = m_getfld_state_init(ib);
  62     for (;;) {
  63         int fieldsz = sizeof field;
  64         switch (state = m_getfld2(&gstate, name, field, &fieldsz)) {
  65             case FLD:
  66             case FLDPLUS:
  67                 NEW(np);
  68                 *npp = np;
  69                 *(npp = &np->n_next) = NULL;
  70                 np->n_name = mh_xstrdup(name);
  71                 if (state == FLDPLUS) {
  72                     cp = mh_xstrdup(field);
  73                     while (state == FLDPLUS) {
  74                         fieldsz = sizeof field;
  75                         state = m_getfld2(&gstate, name, field, &fieldsz);
  76                         cp = add (field, cp);
  77                     }
  78                     np->n_field = trimcpy (cp);
  79                     free (cp);
  80                 } else {
  81                     np->n_field = trimcpy (field);
  82                 }
  83                 np->n_context = ctx;
  84
  85                 /*
  86                  * Now scan the list of `procs' and link in the
  87                  * field value to the global variable.
  88                  */
  89                 for (ps = procs; ps->procname; ps++)
  90                     if (strcmp (np->n_name, ps->procname) == 0) {
  91                         *ps->procnaddr = np->n_field;
  92                         break;
  93                     }
  94                 continue;
  95
  96             case BODY:
  97                 die("no blank lines are permitted in %s", file);
  98
  99             case FILEEOF:
 100                 break;
 101
 102             default:
 103                 die("%s is poorly formatted", file);
 104         }
 105         break;
 106     }
 107     m_getfld_state_destroy (&gstate);
 108
 109     /*
 110      * Special handling for the pager processes: lproc and moreproc.
 111      *
 112      * If they are not set by the profile, use the callers $PAGER if
 113      * available, otherwise set them to DEFAULT_PAGER.
 114      */
 115     if (lproc == NULL) {
 116         lproc = getenv("PAGER");
 117         if (lproc == NULL || lproc[0] == '\0')
 118             lproc = DEFAULT_PAGER;
 119     }
 120     if (moreproc == NULL) {
 121         moreproc = getenv("PAGER");
 122         if (moreproc == NULL || moreproc[0] == '\0')
 123             moreproc = DEFAULT_PAGER;
 124     }
 125
 126     if (opp == NULL) {
 127         /* Check for duplicated non-null profile entries.  Except
 128            allow multiple profile entries named "#", because that's
 129            what mh-profile(5) suggests using for comments.
 130
 131            Only do this check on the very first call from
 132            context_read(), when opp is NULL.  That way, entries in
 133            mhn.defaults can be overridden without triggering
 134            warnings.
 135
 136            Note that mhn.defaults, $MHN, $MHBUILD, $MHSHOW, and
 137            $MHSTORE all put their entries into just one list, m_defs,
 138            the same list that the profile uses. */
 139
 140         struct node *np;
 141         for (np = m_defs; np; np = np->n_next) {
 142             /* Yes, this is O(N^2).  The profile should be small enough so
 143                that's not a performance problem. */
 144             if (*np->n_name && strcmp("#", np->n_name)) {
 145                 struct node *np2;
 146                 for (np2 = np->n_next; np2; np2 = np2->n_next) {
 147                     if (! strcasecmp (np->n_name, np2->n_name)) {
 148                         inform("multiple \"%s\" profile components in %s, "
 149                             "ignoring \"%s\", continuing...",
 150                             np->n_name, defpath, np2->n_field);
 151                     }
 152                 }
 153             }
 154         }
 155     }
 156
 157     opp = npp;
 158 }
 159
 160
 161 void
 162 add_profile_entry (const char *key, const char *value)
 163 {
 164     struct node *newnode;
 165
 166     /* This inserts the new node at the beginning of m_defs because
 167        that doesn't require traversing it or checking to see if it's
 168        empty. */
 169     NEW(newnode);
 170     newnode->n_name = getcpy (key);
 171     newnode->n_field = getcpy (value);
 172     newnode->n_context = 0;
 173     newnode->n_next = m_defs;
 174     m_defs = newnode;
 175 }