2 * context_read.c -- find and read profile and context files
6 * This code is Copyright (c) 2002, by the authors of nmh. See the
7 * COPYRIGHT file in the root directory of the nmh distribution for
8 * complete copyright information.
10 * This function must be called early on in any nmh utility, and
11 * may only be called once. It does the following:
13 * o Sets the global variable "mypath" to the home directory path.
15 * o Sets the global variable "defpath" to the absolute path of
18 * o Reads in the profile file. Bails out if it can't.
20 * o Makes sure that the mail directory exists, prompting for
21 * creation if it doesn't.
23 * o Reads the context file either as set by the MHCONTEXT
24 * environment variable or by the profile.
27 #include <h/mh.h> /* mh internals */
28 #include <errno.h> /* system call errors */
29 #include <pwd.h> /* structure for getpwuid() results */
34 char buf[BUFSIZ]; /* path name buffer */
35 char *cp; /* miscellaneous pointer */
36 char *nd; /* nmh directory pointer */
37 struct stat st; /* stat() results */
38 register struct passwd *pw; /* getpwuid() results */
39 register FILE *ib; /* profile and context file pointer */
42 * If this routine _is_ called again (despite the wanings in the
43 * comments above), return immediately.
49 * Find user's home directory. Try the HOME environment variable first,
50 * the home directory field in the password file if that's not found.
53 if ((mypath = getenv("HOME")) == (char *)0) {
54 if ((pw = getpwuid(getuid())) == (struct passwd *)0 || *pw->pw_dir == '\0')
55 adios(NULL, "cannot determine your home directory");
61 * Find and read user's profile. Check for the existence of an MH environment
62 * variable first with non-empty contents. Convert any relative path name
63 * found there to an absolute one. Look for the profile in the user's home
64 * directory if the MH environment variable isn't set.
67 if ((cp = getenv("MH")) && *cp != '\0') {
68 defpath = path(cp, TFILE);
70 if (stat(defpath, &st) != -1 && (st.st_mode & S_IFREG) == 0)
71 adios((char *)0, "`%s' specified by your MH environment variable is not a normal file", cp);
73 if ((ib = fopen(defpath, "r")) == (FILE *)0)
74 adios((char *)0, "unable to read the `%s' profile specified by your MH environment variable", defpath);
77 defpath = concat(mypath, "/", mh_profile, NULL);
79 if ((ib = fopen(defpath, "r")) == (FILE *)0)
80 adios((char *)0, "Doesn't look like nmh is installed. Run install-mh to do so.");
85 readconfig (&m_defs, ib, cp, 0);
89 * Find the user's nmh directory, which is specified by the "path" profile component.
90 * Convert a relative path name to an absolute one rooted in the home directory.
93 if ((cp = context_find ("path")) == (char *)0)
94 adios(NULL, "Your %s file does not contain a path entry.", defpath);
97 adios(NULL, "Your `%s' profile file does not contain a valid path entry.", defpath);
100 (void)snprintf (nd = buf, sizeof(buf), "%s/%s", mypath, cp);
104 if (stat(nd, &st) == -1) {
106 adios (nd, "error opening");
108 cp = concat ("Your MH-directory \"", nd, "\" doesn't exist; Create it? ", NULL);
111 adios (NULL, "unable to access MH-directory \"%s\"", nd);
116 adios (NULL, "unable to create %s", nd);
119 else if ((st.st_mode & S_IFDIR) == 0)
120 adios ((char *)0, "`%s' is not a directory", nd);
123 * Open and read user's context file. The name of the context file comes from the
124 * profile unless overridden by the MHCONTEXT environment variable.
127 if ((cp = getenv ("MHCONTEXT")) == (char *)0 || *cp == '\0')
130 /* context is NULL if context_foil() was called to disable use of context
131 * We also support users setting explicitly setting MHCONTEXT to /dev/null.
132 * (if this wasn't specialcased then the locking would be liable to fail)
134 if (!cp || (strcmp(cp,"/dev/null") == 0)) {
139 ctxpath = getcpy (m_maildir (cp));
141 if ((ib = lkfopen (ctxpath, "r"))) {
142 readconfig ((struct node **) 0, ib, cp, 1);
143 lkfclose (ib, ctxpath);