It does just what it says on the tin.

[nmh] / sbr / context_read.c

diff --git a/sbr/context_read.c b/sbr/context_read.c
index e6cdfff03f275abe1f2810fddf4b30ba5b92ccc2..a8d142021f002916d01282fd670a1a9d5fe2631e 100644 (file)
--- a/sbr/context_read.c
+++ b/sbr/context_read.c
@@ -1,7 +1,4 @@
-/*
- * context_read.c -- find and read profile and context files
- *
- * $Id$
+/* context_read.c -- find and read profile and context files
  *
  * This code is Copyright (c) 2002, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
@@ -25,11 +22,11 @@
  */
 
 #include <h/mh.h>                              /* mh internals */
-#include <errno.h>                             /* system call errors */
+#include "lock_file.h"
+#include "m_maildir.h"
+#include "makedir.h"
 #include <pwd.h>                               /* structure for getpwuid() results */
 
-extern int     errno;                          /* system call error number */
-
 void
 context_read (void)
 {
@@ -37,19 +34,26 @@ context_read (void)
     char                       *cp;            /* miscellaneous pointer */
     char                       *nd;            /* nmh directory pointer */
     struct     stat            st;             /* stat() results */
-    register   struct  passwd  *pw;            /* getpwuid() results */
-    register   FILE            *ib;            /* profile and context file pointer */
+    struct     passwd          *pw;            /* getpwuid() results */
+    FILE                       *ib;            /* profile and context file pointer */
+    int failed_to_lock = 0;
+
+    /*
+     *  If this routine _is_ called again (despite the warnings in the
+     *  comments above), return immediately.
+     */
+    if ( m_defs != 0 )
+        return;
 
     /*
      * Find user's home directory.  Try the HOME environment variable first,
      * the home directory field in the password file if that's not found.
      */
 
-    if ((mypath = getenv("HOME")) == (char *)0) {
-       if ((pw = getpwuid(getuid())) == (struct passwd *)0 || *pw->pw_dir == '\0')
+    if ((mypath = getenv("HOME")) == NULL) {
+       if ((pw = getpwuid(getuid())) == NULL || *pw->pw_dir == '\0')
            adios(NULL, "cannot determine your home directory");
-       else
-           mypath = pw->pw_dir;
+        mypath = pw->pw_dir;
     }
 
     /*
@@ -62,17 +66,19 @@ context_read (void)
     if ((cp = getenv("MH")) && *cp != '\0') {
        defpath = path(cp, TFILE);
 
+        /* defpath is an absolute path; make sure that always MH is, too. */
+       setenv("MH", defpath, 1);
        if (stat(defpath, &st) != -1 && (st.st_mode & S_IFREG) == 0)
-               adios((char *)0, "`%s' specified by your MH environment variable is not a normal file", cp);
+               adios(NULL, "`%s' specified by your MH environment variable is not a normal file", cp);
 
-       if ((ib = fopen(defpath, "r")) == (FILE *)0)
-           adios((char *)0, "unable to read the `%s' profile specified by your MH environment variable", defpath);
+       if ((ib = fopen(defpath, "r")) == NULL)
+           adios(NULL, "unable to read the `%s' profile specified by your MH environment variable", defpath);
     }
     else {
        defpath = concat(mypath, "/", mh_profile, NULL);
 
-       if ((ib = fopen(defpath, "r")) == (FILE *)0)
-           adios((char *)0, "Doesn't look like nmh is installed.  Run install-mh to do so.");
+       if ((ib = fopen(defpath, "r")) == NULL)
+           adios(NULL, "Doesn't look like nmh is installed.  Run install-mh to do so.");
 
        cp = mh_profile;
     }
@@ -85,7 +91,7 @@ context_read (void)
      * Convert a relative path name to an absolute one rooted in the home directory.
      */
 
-    if ((cp = context_find ("path")) == (char *)0)
+    if ((cp = context_find ("path")) == NULL)
        adios(NULL, "Your %s file does not contain a path entry.", defpath);
 
     if (*cp == '\0')
@@ -102,32 +108,39 @@ context_read (void)
 
        cp = concat ("Your MH-directory \"", nd, "\" doesn't exist; Create it? ", NULL);
 
-       if (!getanswer(cp))
+       if (!read_yes_or_no_if_tty(cp))
            adios (NULL, "unable to access MH-directory \"%s\"", nd);
 
        free (cp);
 
        if (!makedir (nd))
-           adios (NULL, "unable to create", nd);
+           adios (NULL, "unable to create %s", nd);
     }
 
     else if ((st.st_mode & S_IFDIR) == 0)
-       adios ((char *)0, "`%s' is not a directory", nd);
+       adios (NULL, "`%s' is not a directory", nd);
 
     /*
      * Open and read user's context file.  The name of the context file comes from the
      * profile unless overridden by the MHCONTEXT environment variable.
      */
 
-    if ((cp = getenv ("MHCONTEXT")) == (char *)0 || *cp == '\0')
+    if ((cp = getenv ("MHCONTEXT")) == NULL || *cp == '\0')
        cp = context;
 
+    /* context is NULL if context_foil() was called to disable use of context
+     * We also support users setting explicitly setting MHCONTEXT to /dev/null.
+     * (if this wasn't special-cased then the locking would be liable to fail)
+     */
+    if (!cp || (strcmp(cp,"/dev/null") == 0)) {
+       ctxpath = NULL;
+       return;
+    }
+    
     ctxpath = getcpy (m_maildir (cp));
 
-    if ((ib = fopen (ctxpath, "r"))) {
-       readconfig ((struct node **) 0, ib, cp, 1);
-       fclose (ib);
+    if ((ib = lkfopendata (ctxpath, "r", &failed_to_lock))) {
+       readconfig(NULL, ib, cp, 1);
+       lkfclosedata (ib, ctxpath);
     }
-
-    return;
 }