/*
* context_read.c -- find and read profile and context files
*
- * $Id$
- *
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*
- * This function must be called early on in any nmh utility, and
- * may only be called once. It does the following:
+ * This function must be called early on in any nmh utility, and
+ * may only be called once. It does the following:
*
- * o Sets the global variable "mypath" to the home directory path.
+ * o Sets the global variable "mypath" to the home directory path.
*
- * o Sets the global variable "defpath" to the absolute path of
- * the profile file.
+ * o Sets the global variable "defpath" to the absolute path of
+ * the profile file.
*
- * o Reads in the profile file. Bails out if it can't.
+ * o Reads in the profile file. Bails out if it can't.
*
- * o Makes sure that the mail directory exists, prompting for
- * creation if it doesn't.
+ * o Makes sure that the mail directory exists, prompting for
+ * creation if it doesn't.
*
- * o Reads the context file either as set by the MHCONTEXT
- * environment variable or by the profile.
+ * o Reads the context file either as set by the MHCONTEXT
+ * environment variable or by the profile.
*/
-#include <h/mh.h> /* mh internals */
-#include <errno.h> /* system call errors */
-#include <pwd.h> /* structure for getpwuid() results */
-
-extern int errno; /* system call error number */
+#include <h/mh.h> /* mh internals */
+#include <errno.h> /* system call errors */
+#include <pwd.h> /* structure for getpwuid() results */
void
context_read (void)
{
- char buf[BUFSIZ]; /* path name buffer */
- 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 */
-
- /*
- * 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) {
+ char buf[BUFSIZ]; /* path name buffer */
+ 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 */
+
+ /*
+ * If this routine _is_ called again (despite the wanings 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')
- adios(NULL, "cannot determine your home directory");
+ adios(NULL, "cannot determine your home directory");
else
- mypath = pw->pw_dir;
- }
+ mypath = pw->pw_dir;
+ }
- /*
- * Find and read user's profile. Check for the existence of an MH environment
- * variable first with non-empty contents. Convert any relative path name
- * found there to an absolute one. Look for the profile in the user's home
- * directory if the MH environment variable isn't set.
- */
+ /*
+ * Find and read user's profile. Check for the existence of an MH environment
+ * variable first with non-empty contents. Convert any relative path name
+ * found there to an absolute one. Look for the profile in the user's home
+ * directory if the MH environment variable isn't set.
+ */
- if ((cp = getenv("MH")) && *cp != '\0') {
+ if ((cp = getenv("MH")) && *cp != '\0') {
defpath = path(cp, TFILE);
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);
if ((ib = fopen(defpath, "r")) == (FILE *)0)
- adios((char *)0, "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.");
-
- cp = mh_profile;
- }
-
- readconfig (&m_defs, ib, cp, 0);
- fclose (ib);
-
- /*
- * Find the user's nmh directory, which is specified by the "path" profile component.
- * Convert a relative path name to an absolute one rooted in the home directory.
- */
-
- if ((cp = context_find ("path")) == (char *)0)
- adios(NULL, "Your %s file does not contain a path entry.", defpath);
+ adios((char *)0, "unable to read the `%s' profile specified by your MH environment variable", defpath);
+ } else {
+ defpath = concat(mypath, "/", mh_profile, NULL);
- if (*cp == '\0')
- adios(NULL, "Your `%s' profile file does not contain a valid path entry.", defpath);
+ if ((ib = fopen(defpath, "r")) == (FILE *)0)
+ adios((char *)0, "Doesn't look like nmh is installed. Run install-mh to do so.");
- if (*cp != '/')
- (void)snprintf (nd = buf, sizeof(buf), "%s/%s", mypath, cp);
- else
- nd = cp;
+ cp = mh_profile;
+ }
- if (stat(nd, &st) == -1) {
- if (errno != ENOENT)
- adios (nd, "error opening");
+ readconfig (&m_defs, ib, cp, 0);
+ fclose (ib);
- cp = concat ("Your MH-directory \"", nd, "\" doesn't exist; Create it? ", NULL);
+ /*
+ * Find the user's nmh directory, which is specified by the "path" profile component.
+ * Convert a relative path name to an absolute one rooted in the home directory.
+ */
- if (!getanswer(cp))
- adios (NULL, "unable to access MH-directory \"%s\"", nd);
+ if ((cp = context_find ("path")) == (char *)0)
+ adios(NULL, "Your %s file does not contain a path entry.", defpath);
- free (cp);
+ if (*cp == '\0')
+ adios(NULL, "Your `%s' profile file does not contain a valid path entry.", defpath);
- if (!makedir (nd))
- adios (NULL, "unable to create", nd);
- }
-
- else if ((st.st_mode & S_IFDIR) == 0)
- adios ((char *)0, "`%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')
- cp = context;
-
- ctxpath = getcpy (m_maildir (cp));
-
- if ((ib = lkfopen (ctxpath, "r"))) {
- readconfig ((struct node **) 0, ib, cp, 1);
- lkfclose (ib, ctxpath);
- }
-
- return;
+ if (*cp != '/')
+ (void)snprintf (nd = buf, sizeof(buf), "%s/%s", mypath, cp);
+ else
+ nd = cp;
+
+ if (stat(nd, &st) == -1) {
+ if (errno != ENOENT)
+ adios (nd, "error opening");
+ cp = concat ("Your MH-directory \"", nd, "\" doesn't exist; Create it? ", NULL);
+ if (!getanswer(cp))
+ adios (NULL, "unable to access MH-directory \"%s\"", nd);
+ free (cp);
+ if (!makedir (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);
+
+ /*
+ * 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')
+ 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 specialcased 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 = lkfopen (ctxpath, "r"))) {
+ readconfig ((struct node **) 0, ib, cp, 1);
+ lkfclose (ib, ctxpath);
+ }
+
+ return;
}