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/*
* context_read.c -- find and read profile and context files
*
* $Id: context_read.c,v 1.10 2007/03/21 00:21:10 pm215 Exp $
*
* 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:
*
* 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 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 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 */
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 */
/*
* 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");
else
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.
*/
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);
if (*cp == '\0')
adios(NULL, "Your `%s' profile file does not contain a valid path entry.", defpath);
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;
}
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