-
/*
* 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:
+ *
+ * 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>
-#include <errno.h>
-#include <pwd.h>
-
-extern int errno;
+#include <h/mh.h> /* mh internals */
+#include <errno.h> /* system call errors */
+#include <pwd.h> /* structure for getpwuid() results */
void
context_read (void)
{
- pid_t pid;
- register char *cp, *pp;
- char buf[BUFSIZ];
- struct stat st;
- register struct passwd *pw;
- register FILE *ib;
-
- if (defpath)
- return;
+ 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
+ * 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) {
- if ((mypath = getenv ("HOME")))
- mypath = getcpy (mypath);
+
+ 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
- if ((pw = getpwuid (getuid ())) == NULL
- || pw->pw_dir == NULL
- || *pw->pw_dir == 0)
- adios (NULL, "no HOME envariable");
- else
- mypath = getcpy (pw->pw_dir);
- if ((cp = mypath + strlen (mypath) - 1) > mypath && *cp == '/')
- *cp = 0;
+ mypath = pw->pw_dir;
}
/*
- * open and read user's profile
+ * 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 ((ib = fopen (defpath, "r")) == NULL)
- adios (defpath, "unable to read");
- if (*cp != '/')
- m_putenv ("MH", defpath);
- } else {
- defpath = concat (mypath, "/", mh_profile, NULL);
-
- if ((ib = fopen (defpath, "r")) == NULL) {
- switch (pid = vfork ()) {
- case -1:
- adios ("fork", "unable to");
-
- case 0:
- setgid (getgid ());
- setuid (getuid ());
-
- execlp (installproc, "install-mh", "-auto", NULL);
- fprintf (stderr, "unable to exec ");
- perror (installproc);
- _exit (-1);
-
- default:
- if (pidwait (pid, 0)
- || (ib = fopen (defpath, "r")) == NULL)
- adios (NULL, "[install-mh aborted]");
- }
- }
+
+ 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, mh_profile, 0);
+
+ readconfig (&m_defs, ib, cp, 0);
fclose (ib);
/*
- * Find user's nmh directory
+ * 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 ((pp = context_find ("path")) && *pp != '\0') {
- if (*pp != '/')
- snprintf (buf, sizeof(buf), "%s/%s", mypath, pp);
- else
- strncpy (buf, pp, sizeof(buf));
- if (stat(buf, &st) == -1) {
- if (errno != ENOENT)
- adios (buf, "error opening");
- cp = concat ("Your MH-directory \"", buf,
- "\" doesn't exist; Create it? ", NULL);
- if (!getanswer(cp))
- adios (NULL, "unable to access MH-directory \"%s\"", buf);
- free (cp);
- if (!makedir (buf))
- adios (NULL, "unable to create", buf);
- }
+
+ 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", 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
+ * 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")) || *cp == '\0')
+
+ if ((cp = getenv ("MHCONTEXT")) == (char *)0 || *cp == '\0')
cp = context;
+
ctxpath = getcpy (m_maildir (cp));
- if ((ib = fopen (ctxpath, "r"))) {
+
+ if ((ib = lkfopen (ctxpath, "r"))) {
readconfig ((struct node **) 0, ib, cp, 1);
- fclose (ib);
+ lkfclose (ib, ctxpath);
}
+
+ return;
}
projects / mmh / blobdiff