-
/*
- * context_read.c -- find and read profile and context files
- *
- * $Id$
- */
-
-#include <h/mh.h>
-#include <errno.h>
-#include <pwd.h>
+** 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
+** 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 variables to absolute paths:
+** - "mypath": home directory (HOME)
+** - "mmhpath": mmh directory (MMH)
+** - "defpath": profile file (MMHP)
+** - "ctxpath": context file (MMHC)
+**
+** 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.
+**
+** You might need to adjust uip/mmh.sh if you make changes here.
+*/
-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)
+context_read(void)
{
- pid_t pid;
- register char *cp, *pp;
- char buf[BUFSIZ];
- struct stat st;
- register struct passwd *pw;
- register FILE *ib;
+ 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) {
+ return;
+ }
- if (defpath)
- 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"))) {
+ if (!(pw = getpwuid(getuid())) || !*pw->pw_dir) {
+ adios(NULL, "cannot determine your home directory");
+ }
+ mypath = pw->pw_dir;
+ }
- /*
- * Find user's home directory
- */
- if (!mypath) {
- if ((mypath = getenv ("HOME")))
- mypath = getcpy (mypath);
- 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;
- }
+ /*
+ ** set mmhpath
+ */
+ if ((cp = getenv("MMH")) && *cp) {
+ mmhpath = getcpy(expanddir(cp)); /* rel to cwd */
+ if (stat(mmhpath, &st) != -1 && (st.st_mode & S_IFDIR) == 0) {
+ adios(NULL, "`%s' specified by your MMH environment variable is not a directory", cp);
+ }
+ } else {
+ mmhpath = concat(mypath, "/", mmhdir, NULL);
+ if (stat(mmhpath, &st) == -1 || (st.st_mode & S_IFDIR) == 0) {
+ adios(NULL, "Doesn't look like mmh is set up for your account. Run `install-mh' to do so.");
+ }
+ }
- /*
- * open and read user's profile
- */
- 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);
+ /*
+ ** Find and read user's profile. Check for the existence of
+ ** a non-empty MMHP environment variable first. Look for the
+ ** profile in the mmh directory otherwise.
+ */
+ if ((cp = getenv("MMHP")) && *cp) {
+ if (*cp == '/') {
+ defpath = getcpy(cp);
+ } else {
+ defpath = concat(mmhpath, "/", cp, NULL);
+ }
+ if (stat(defpath, &st) != -1 && (st.st_mode & S_IFREG) == 0) {
+ adios(NULL, "Your profile `%s', specified by the MMHP environment variable, is not a normal file", cp);
+ }
+ if ((ib = fopen(defpath, "r")) == (FILE *)0) {
+ adios(NULL, "Unable to read your profile `%s', specified by the MMHP environment variable", defpath);
+ }
+ } else {
+ defpath = concat(mmhpath, "/", profile, NULL);
+ if ((ib = fopen(defpath, "r")) == (FILE *)0) {
+ adios(NULL, "No profile found. Please create `%s' first.", defpath);
+ }
+ cp = profile;
+ }
+ readconfig(&m_defs, ib, cp, 0);
+ fclose(ib);
- if ((ib = fopen (defpath, "r")) == NULL) {
- switch (pid = vfork ()) {
- case -1:
- adios ("fork", "unable to");
+ /*
+ ** Find the user's mail storage 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")) == NULL) {
+ adios(NULL, "Your profile `%s' does not contain the required path entry.", defpath);
+ }
+ if (!*cp) {
+ adios(NULL, "The Path entry of your profile `%s' must be non-empty.", defpath);
+ }
+ if (*cp == '/') {
+ nd = cp;
+ } else {
+ snprintf(nd = buf, sizeof buf, "%s/%s", mypath, cp);
+ }
+ if (stat(nd, &st) == -1) {
+ if (errno != ENOENT) {
+ adios(nd, "error opening");
+ }
+ cp = concat("Your mail storage directory `", nd, "' doesn't exist; Create it? ", NULL);
+ if (!getanswer(cp)) {
+ adios(NULL, "Unable to access the mail storage directory `%s'", nd);
+ }
+ free(cp);
+ if (!makedir(nd)) {
+ adios(nd, "unable to create");
+ }
+ } else if ((st.st_mode & S_IFDIR) == 0) {
+ adios(NULL, "Your mail storage `%s' is not a directory", nd);
+ }
+ /*
+ ** Create the default folder (inbox)
+ */
+ cp = toabsdir(defaultfolder);
+ if (stat(cp, &st) == -1) {
+ if (!makedir(cp)) {
+ adios(cp, "Unable to create the default folder");
+ }
+ } else if ((st.st_mode & S_IFDIR) == 0) {
+ adios(NULL, "The default folder `%s' is not a directory", cp);
+ }
- case 0:
- setgid (getgid ());
- setuid (getuid ());
+ /*
+ ** Open and read user's context file. The name of the context
+ ** file comes from the profile unless overridden by the MMHC
+ ** environment variable.
+ */
+ if (!(cp = getenv("MMHC")) || !*cp) {
+ if (!(cp = context_find("context")) || !*cp) {
+ cp = context;
+ }
+ }
- execlp (installproc, "install-mh", "-auto", NULL);
- fprintf (stderr, "unable to exec ");
- perror (installproc);
- _exit (-1);
+ /*
+ ** context is NULL if context_foil() was called to disable use
+ ** of context. We also support users setting explicitly setting
+ ** MMHC to /dev/null. (If this wasn't special-cased then the
+ ** locking would be liable to fail.)
+ */
+ if (!context || (strcmp(cp, "/dev/null") == 0)) {
+ ctxpath = NULL;
+ return;
+ }
- default:
- if (pidwait (pid, 0)
- || (ib = fopen (defpath, "r")) == NULL)
- adios (NULL, "[install-mh aborted]");
- }
+ if (*cp == '/') {
+ ctxpath = getcpy(cp);
+ } else {
+ ctxpath = concat(mmhpath, "/", cp, NULL);
+ }
+ if ((ib = lkfopen(ctxpath, "r"))) {
+ readconfig((struct node **) 0, ib, cp, 1);
+ lkfclose(ib, ctxpath);
}
- }
- readconfig (&m_defs, ib, mh_profile, 0);
- fclose (ib);
- /*
- * Find user's nmh 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);
+ /* Set editor */
+ if (!(cp = getenv("MMHEDITOR")) || !*cp) {
+ if (!(cp = context_find("editor")) || !*cp) {
+ if (!(cp = getenv("VISUAL")) || !*cp) {
+ if (!(cp = getenv("EDITOR")) || !*cp) {
+ cp = defaulteditor;
+ }
+ }
+ }
}
- }
+ defaulteditor = cp;
- /*
- * open and read user's context file
- */
- if (!(cp = getenv ("MHCONTEXT")) || *cp == '\0')
- cp = context;
- ctxpath = getcpy (m_maildir (cp));
- if ((ib = fopen (ctxpath, "r"))) {
- readconfig ((struct node **) 0, ib, cp, 1);
- fclose (ib);
- }
+ /* Set pager */
+ if (!(cp = getenv("MMHPAGER")) || !*cp) {
+ if (!(cp = context_find("pager")) || !*cp) {
+ if (!(cp = getenv("PAGER")) || !*cp) {
+ cp = defaultpager;
+ }
+ }
+ }
+ defaultpager = cp;
}
projects / mmh / blobdiff