--- /dev/null
+
+/*
+ * mts.c -- definitions for the mail transport system
+ *
+ * $Id$
+ */
+
+#include "h/mh.h" /* for snprintf() */
+#include <h/nmh.h>
+
+#define nmhetcdir(file) NMHETCDIR#file
+
+#include <ctype.h>
+#include <stdio.h>
+#include <mts.h>
+#include <pwd.h>
+#include <netdb.h>
+
+#ifdef HAVE_SYS_UTSNAME_H
+# include <sys/utsname.h>
+#endif
+
+#define NOTOK (-1)
+#define OK 0
+
+extern int errno;
+
+/*
+ * static prototypes
+ */
+static char *tailor_value (char *);
+static void getuserinfo (void);
+
+/*
+ * *mmdfldir and *uucpldir are the maildrop directories. If maildrops
+ * are kept in the user's home directory, then these should be empty
+ * strings. In this case, the appropriate ...lfil array should contain
+ * the name of the file in the user's home directory. Usually, this is
+ * something like ".mail".
+ */
+
+/*
+ * nmh mail transport interface customization file
+ */
+static char *mtsconf = nmhetcdir(/mts.conf);
+
+static char *localname = "";
+static char *localdomain = "";
+static char *systemname = "";
+
+char *mmdfldir = MAILSPOOL;
+char *mmdflfil = "";
+char *uucpldir = "/usr/spool/mail";
+char *uucplfil = "";
+
+char *mmdlm1 = "\001\001\001\001\n";
+char *mmdlm2 = "\001\001\001\001\n";
+
+/* Cache the username and fullname of the user */
+static char username[BUFSIZ];
+static char fullname[BUFSIZ];
+
+/* Variables for username masquerading: */
+ boolean draft_from_masquerading = FALSE; /* also used from post.c */
+static boolean mmailid_masquerading = FALSE;
+ boolean username_extension_masquerading = FALSE; /* " from addrsbr.c */
+static char* masquerade = "";
+
+/*
+ * MTS specific variables
+ */
+#if defined(SMTPMTS)
+static char *sm_method = "smtp";
+int sm_mts = MTS_SMTP;
+char *hostable = nmhetcdir(/hosts);
+char *sendmail = SENDMAILPATH;
+#endif
+
+/*
+ * SMTP/POP stuff
+ */
+char *clientname = NULL;
+char *servers = "localhost \01localnet";
+char *pophost = "";
+
+/*
+ * BBoards-specific variables
+ */
+char *bb_domain = "";
+
+
+/*
+ * POP BBoards-specific variables
+ */
+#ifdef BPOP
+char *popbbhost = "";
+char *popbbuser = "";
+char *popbblist = nmhetcdir(/hosts.popbb);
+#endif /* BPOP */
+
+/*
+ * Global MailDelivery file
+ */
+char *maildelivery = nmhetcdir(/maildelivery);
+
+
+/*
+ * Aliasing Facility (doesn't belong here)
+ */
+int Everyone = NOTOK;
+static char *everyone = "-1";
+char *NoShell = "";
+
+/*
+ * Customize the MTS settings for nmh by adjusting
+ * the file mts.conf in the nmh etc directory.
+ */
+
+struct bind {
+ char *keyword;
+ char **value;
+};
+
+static struct bind binds[] = {
+ { "localname", &localname },
+ { "localdomain", &localdomain },
+ { "systemname", &systemname },
+ { "mmdfldir", &mmdfldir },
+ { "mmdflfil", &mmdflfil },
+ { "uucpldir", &uucpldir },
+ { "uucplfil", &uucplfil },
+ { "mmdelim1", &mmdlm1 },
+ { "mmdelim2", &mmdlm2 },
+ { "masquerade", &masquerade },
+
+#if defined(SMTPMTS)
+ { "mts", &sm_method },
+ { "hostable", &hostable },
+ { "sendmail", &sendmail },
+#endif
+
+ { "clientname", &clientname },
+ { "servers", &servers },
+ { "pophost", &pophost },
+ { "bbdomain", &bb_domain },
+
+#ifdef BPOP
+ { "popbbhost", &popbbhost },
+ { "popbbuser", &popbbuser },
+ { "popbblist", &popbblist },
+#endif
+
+#ifdef NNTP
+ { "nntphost", &popbbhost },
+#endif
+
+ { "maildelivery", &maildelivery },
+ { "everyone", &everyone },
+ { "noshell", &NoShell },
+ { NULL, NULL }
+};
+
+
+/*
+ * Read the configuration file for the nmh interface
+ * to the mail transport system (MTS).
+ */
+
+void
+mts_init (char *name)
+{
+ char *bp, *cp, buffer[BUFSIZ];
+ struct bind *b;
+ FILE *fp;
+ static int inited = 0;
+
+ if (inited++ || (fp = fopen (mtsconf, "r")) == NULL)
+ return;
+
+ while (fgets (buffer, sizeof(buffer), fp)) {
+ if (!(cp = strchr(buffer, '\n')))
+ break;
+ *cp = 0;
+ if (*buffer == '#' || *buffer == '\0')
+ continue;
+ if (!(bp = strchr(buffer, ':')))
+ break;
+ *bp++ = 0;
+ while (isspace (*bp))
+ *bp++ = 0;
+
+ for (b = binds; b->keyword; b++)
+ if (!strcmp (buffer, b->keyword))
+ break;
+ if (b->keyword && (cp = tailor_value (bp)))
+ *b->value = cp;
+ }
+
+ fclose (fp);
+
+ Everyone = atoi (everyone);
+
+ if (strstr(masquerade, "draft_from") != NULL)
+ draft_from_masquerading = TRUE;
+
+ if (strstr(masquerade, "mmailid") != NULL)
+ mmailid_masquerading = TRUE;
+
+ if (strstr(masquerade, "username_extension") != NULL)
+ username_extension_masquerading = TRUE;
+
+#ifdef SMTPMTS
+ if (strcmp(sm_method, "smtp") == 0)
+ sm_mts = MTS_SMTP;
+ else if (strcmp(sm_method, "sendmail") == 0)
+ sm_mts = MTS_SENDMAIL;
+ else {
+ advise(NULL, "unsupported \"mts\" value in mts.conf: %s", sm_method);
+ sm_mts = MTS_SMTP;
+ }
+#endif
+}
+
+
+#define QUOTE '\\'
+
+/*
+ * Convert escaped values, malloc some new space,
+ * and copy string to malloc'ed memory.
+ */
+
+static char *
+tailor_value (char *s)
+{
+ int i, r;
+ char *bp;
+ char buffer[BUFSIZ];
+ size_t len;
+
+ for (bp = buffer; *s; bp++, s++) {
+ if (*s != QUOTE) {
+ *bp = *s;
+ } else {
+ switch (*++s) {
+ case 'b': *bp = '\b'; break;
+ case 'f': *bp = '\f'; break;
+ case 'n': *bp = '\n'; break;
+ case 't': *bp = '\t'; break;
+
+ case 0: s--;
+ case QUOTE:
+ *bp = QUOTE;
+ break;
+
+ default:
+ if (!isdigit (*s)) {
+ *bp++ = QUOTE;
+ *bp = *s;
+ }
+ r = *s != '0' ? 10 : 8;
+ for (i = 0; isdigit (*s); s++)
+ i = i * r + *s - '0';
+ s--;
+ *bp = toascii (i);
+ break;
+ }
+ }
+ }
+ *bp = 0;
+
+ len = strlen (buffer) + 1;
+ if ((bp = malloc (len)))
+ memcpy (bp, buffer, len);
+
+ return bp;
+}
+
+/*
+ * Get the fully qualified name of the local host.
+ */
+
+char *
+LocalName (void)
+{
+ static char buffer[BUFSIZ] = "";
+ struct hostent *hp;
+
+#ifdef HAVE_UNAME
+ struct utsname name;
+#endif
+
+ /* check if we have cached the local name */
+ if (buffer[0])
+ return buffer;
+
+ mts_init ("mts");
+
+ /* check if the mts.conf file specifies a "localname" */
+ if (*localname) {
+ strncpy (buffer, localname, sizeof(buffer));
+ } else {
+#ifdef HAVE_UNAME
+ /* first get our local name */
+ uname (&name);
+ strncpy (buffer, name.nodename, sizeof(buffer));
+#else
+ /* first get our local name */
+ gethostname (buffer, sizeof(buffer));
+#endif
+#ifdef HAVE_SETHOSTENT
+ sethostent (1);
+#endif
+ /* now fully qualify our name */
+ if ((hp = gethostbyname (buffer)))
+ strncpy (buffer, hp->h_name, sizeof(buffer));
+ }
+
+ /*
+ * If the mts.conf file specifies a "localdomain",
+ * we append that now. This should rarely be needed.
+ */
+ if (*localdomain) {
+ strcat (buffer, ".");
+ strcat (buffer, localdomain);
+ }
+
+ return buffer;
+}
+
+
+/*
+ * This is only for UUCP mail. It gets the hostname
+ * as part of the UUCP "domain".
+ */
+
+char *
+SystemName (void)
+{
+ static char buffer[BUFSIZ] = "";
+
+#ifdef HAVE_UNAME
+ struct utsname name;
+#endif
+
+ /* check if we have cached the system name */
+ if (buffer[0])
+ return buffer;
+
+ mts_init ("mts");
+
+ /* check if mts.conf file specifies a "systemname" */
+ if (*systemname) {
+ strncpy (buffer, systemname, sizeof(buffer));
+ return buffer;
+ }
+
+#ifdef HAVE_UNAME
+ uname (&name);
+ strncpy (buffer, name.nodename, sizeof(buffer));
+#else
+ gethostname (buffer, sizeof(buffer));
+#endif
+
+ return buffer;
+}
+
+
+/*
+ * Get the username of current user
+ */
+
+char *
+getusername (void)
+{
+ if (username[0] == '\0')
+ getuserinfo();
+
+ return username;
+}
+
+
+/*
+ * Get full name of current user (typically from GECOS
+ * field of password file).
+ */
+
+char *
+getfullname (void)
+{
+ if (username[0] == '\0')
+ getuserinfo();
+
+ return fullname;
+}
+
+
+/*
+ * Find the user's username and full name, and cache them.
+ * Also, handle "mmailid" username masquerading controlled from the GECOS field
+ * of the passwd file.
+ */
+
+static void
+getuserinfo (void)
+{
+ register char *cp, *np;
+ register struct passwd *pw;
+
+#ifdef KPOP
+ uid_t uid;
+
+ uid = getuid ();
+ if (uid == geteuid () && (cp = getenv ("USER")) != NULL
+ && (pw = getpwnam (cp)) != NULL)
+ strncpy (username, cp, sizeof(username));
+ else if ((pw = getpwuid (uid)) == NULL
+ || pw->pw_name == NULL
+ || *pw->pw_name == '\0') {
+#else /* KPOP */
+ if ((pw = getpwuid (getuid ())) == NULL
+ || pw->pw_name == NULL
+ || *pw->pw_name == '\0') {
+#endif /* KPOP */
+ strncpy (username, "unknown", sizeof(username));
+ snprintf (fullname, sizeof(fullname), "The Unknown User-ID (%d)",
+ (int) getuid ());
+ return;
+ }
+
+ np = pw->pw_gecos;
+
+ /* Get the user's real name from the GECOS field. Stop once we hit a ',',
+ which some OSes use to separate other 'finger' information in the GECOS
+ field, like phone number. Also, if mmailid masquerading is turned on due
+ to "mmailid" appearing on the "masquerade:" line of mts.conf, stop if we
+ hit a '<' (which should precede any ','s). */
+#ifndef BSD42
+ if (mmailid_masquerading)
+ /* Stop at ',' or '<'. */
+ for (cp = fullname; *np != '\0' && *np != ',' && *np != '<';
+ *cp++ = *np++)
+ continue;
+ else
+ /* Allow '<' as a legal character of the user's name. This code is
+ basically a duplicate of the code above the "else" -- we don't
+ collapse it down to one copy and put the mmailid_masquerading check
+ inside the loop with "(x ? y : z)" because that's inefficient and the
+ value'll never change while it's in there. */
+ for (cp = fullname; *np != '\0' && *np != ',';
+ *cp++ = *np++)
+ continue;
+#else /* BSD42 */
+ /* On BSD(-derived) systems, the system utilities that deal with the GECOS
+ field (finger, mail, sendmail, etc.) translate any '&' character in it to
+ the login name, with the first letter capitalized. So, for instance,
+ fingering a user "bob" with the GECOS field "& Jones" would reveal him to
+ be "In real life: Bob Jones". Surprisingly, though, the OS doesn't do
+ the translation for you, so we have to do it manually here. */
+ if (mmailid_masquerading)
+ /* Stop at ',' or '<'. */
+ for (cp = fullname;
+ *np != '\0' && *np != ',' && *np != '<';) {
+ if (*np == '&') { /* blech! */
+ strcpy (cp, pw->pw_name);
+ *cp = toupper(*cp);
+ while (*cp)
+ cp++;
+ np++;
+ } else {
+ *cp++ = *np++;
+ }
+ }
+ else
+ /* Allow '<' as a legal character of the user's name. This code is
+ basically a duplicate of the code above the "else" -- we don't
+ collapse it down to one copy and put the mmailid_masquerading check
+ inside the loop with "(x ? y : z)" because that's inefficient and the
+ value'll never change while it's in there. */
+ for (cp = fullname;
+ *np != '\0' && *np != ',';) {
+ if (*np == '&') { /* blech! */
+ strcpy (cp, pw->pw_name);
+ *cp = toupper(*cp);
+ while (*cp)
+ cp++;
+ np++;
+ } else {
+ *cp++ = *np++;
+ }
+ }
+#endif /* BSD42 */
+ *cp = '\0';
+
+ if (mmailid_masquerading) {
+ /* Do mmailid processing. The GECOS field should have the form
+ "Full Name <fakeusername>". For instance,
+ "Dan Harkless <Dan.Harkless>". Naturally, you'll want your MTA to
+ have an alias (e.g. in /etc/aliases) from "fakeusername" to your
+ account name. */
+ if (*np)
+ np++;
+ for (cp = username; *np && *np != '>'; *cp++ = *np++)
+ continue;
+ *cp = '\0';
+ }
+ if (!mmailid_masquerading || *np == '\0')
+ strncpy (username, pw->pw_name, sizeof(username));
+
+ /* The $SIGNATURE environment variable overrides the GECOS field's idea of
+ your real name. */
+ if ((cp = getenv ("SIGNATURE")) && *cp)
+ strncpy (fullname, cp, sizeof(fullname));
+
+ if (strchr(fullname, '.')) { /* quote any .'s */
+ char tmp[BUFSIZ];
+
+ /* should quote "'s too */
+ snprintf (tmp, sizeof(tmp), "\"%s\"", fullname);
+ strncpy (fullname, tmp, sizeof(fullname));
+ }
+
+ return;
+}
projects / mmh / blobdiff