2 ** context_read.c -- find and read profile and context files
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
8 ** This function must be called early on in any nmh utility, and
9 ** may only be called once. It does the following:
11 ** o Sets the global variables to absolute paths:
12 ** - "mypath": home directory (HOME)
13 ** - "mmhpath": mmh directory (MMH)
14 ** - "defpath": profile file (MMHP)
15 ** - "ctxpath": context file (MMHC)
17 ** o Reads in the profile file. Bails out if it can't.
19 ** o Makes sure that the mail directory exists, prompting for
20 ** creation if it doesn't.
22 ** o Reads the context file.
24 ** You might need to adjust uip/mmh.sh if you make changes here.
27 #include <h/mh.h> /* mh internals */
28 #include <errno.h> /* system call errors */
29 #include <pwd.h> /* structure for getpwuid() results */
36 char buf[BUFSIZ]; /* path name buffer */
37 char *cp; /* miscellaneous pointer */
38 char *nd; /* nmh directory pointer */
39 struct stat st; /* stat() results */
40 register struct passwd *pw; /* getpwuid() results */
41 register FILE *ib; /* profile and context file pointer */
44 ** If this routine _is_ called again (despite the wanings in the
45 ** comments above), return immediately.
52 ** Find user's home directory. Try the HOME environment variable first,
53 ** the home directory field in the password file if that's not found.
55 if (!(mypath = getenv("HOME"))) {
56 if (!(pw = getpwuid(getuid())) || !*pw->pw_dir) {
57 adios(NULL, "cannot determine your home directory");
65 if ((cp = getenv("MMH")) && *cp) {
66 mmhpath = getcpy(expanddir(cp)); /* rel to cwd */
67 if (stat(mmhpath, &st) != -1 && (st.st_mode & S_IFDIR) == 0) {
68 adios(NULL, "`%s' specified by your MMH environment variable is not a directory", cp);
71 mmhpath = concat(mypath, "/", mmhdir, NULL);
72 if (stat(mmhpath, &st) == -1 || (st.st_mode & S_IFDIR) == 0) {
73 adios(NULL, "Doesn't look like mmh is set up for your account. Run `mmh' to do so.");
78 ** Find and read user's profile. Check for the existence of
79 ** a non-empty MMHP environment variable first. Look for the
80 ** profile in the mmh directory otherwise.
82 if ((cp = getenv("MMHP")) && *cp) {
86 defpath = concat(mmhpath, "/", cp, NULL);
88 if (stat(defpath, &st) != -1 && (st.st_mode & S_IFREG) == 0) {
89 adios(NULL, "Your profile `%s', specified by the MMHP environment variable, is not a normal file", cp);
91 if ((ib = fopen(defpath, "r")) == (FILE *)0) {
92 adios(NULL, "Unable to read your profile `%s', specified by the MMHP environment variable", defpath);
95 defpath = concat(mmhpath, "/", profile, NULL);
96 if ((ib = fopen(defpath, "r")) == (FILE *)0) {
97 adios(NULL, "No profile found. Please create `%s' first.", defpath);
101 readconfig(&m_defs, ib, cp, 0);
105 ** Find the user's mail storage directory, which is specified by
106 ** the `Path' profile component. Convert a relative path name
107 ** to an absolute one rooted in the home directory.
109 if ((cp = context_find("path")) == NULL) {
110 adios(NULL, "Your profile `%s' does not contain the required path entry.", defpath);
113 adios(NULL, "The Path entry of your profile `%s' must be non-empty.", defpath);
118 snprintf(nd = buf, sizeof buf, "%s/%s", mypath, cp);
120 if (stat(nd, &st) == -1) {
121 if (errno != ENOENT) {
122 adios(nd, "error opening");
124 cp = concat("Your mail storage directory `", nd, "' doesn't exist; Create it? ", NULL);
125 if (!getanswer(cp)) {
126 adios(NULL, "Unable to access the mail storage directory `%s'", nd);
130 adios(nd, "unable to create");
132 } else if ((st.st_mode & S_IFDIR) == 0) {
133 adios(NULL, "Your mail storage `%s' is not a directory", nd);
136 ** Create the default folder (inbox)
138 cp = toabsdir(defaultfolder);
139 if (stat(cp, &st) == -1) {
141 adios(cp, "Unable to create the default folder");
143 } else if ((st.st_mode & S_IFDIR) == 0) {
144 adios(NULL, "The default folder `%s' is not a directory", cp);
148 ** Open and read user's context file. The name of the context
149 ** file comes from the profile unless overridden by the MMHC
150 ** environment variable.
152 if (!(cp = getenv("MMHC")) || !*cp) {
153 if (!(cp = context_find("context")) || !*cp) {
159 ** context is NULL if the use of the context was diabled.
160 ** We also support users setting explicitly setting
161 ** MMHC to /dev/null. (If this wasn't special-cased then the
162 ** locking would be liable to fail.)
164 if (!context || (strcmp(cp, "/dev/null") == 0)) {
170 ctxpath = getcpy(cp);
172 ctxpath = concat(mmhpath, "/", cp, NULL);
174 if ((ib = lkfopen(ctxpath, "r"))) {
175 readconfig((struct node **) 0, ib, cp, 1);
176 lkfclose(ib, ctxpath);
180 if (!(cp = getenv("MMHEDITOR")) || !*cp) {
181 if (!(cp = context_find("editor")) || !*cp) {
182 if (!(cp = getenv("VISUAL")) || !*cp) {
183 if (!(cp = getenv("EDITOR")) || !*cp) {
192 if (!(cp = getenv("MMHPAGER")) || !*cp) {
193 if (!(cp = context_find("pager")) || !*cp) {
194 if (!(cp = getenv("PAGER")) || !*cp) {