BSD 4_3_Reno release

[unix-history] / usr / src / usr.bin / mail / lex.c

diff --git a/usr/src/usr.bin/mail/lex.c b/usr/src/usr.bin/mail/lex.c
index 8d890dc..880c99a 100644 (file)
--- a/usr/src/usr.bin/mail/lex.c
+++ b/usr/src/usr.bin/mail/lex.c
@@ -1,6 +1,29 @@
-#
+/*
+ * Copyright (c) 1980 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted provided
+ * that: (1) source distributions retain this entire copyright notice and
+ * comment, and (2) distributions including binaries display the following
+ * acknowledgement:  ``This product includes software developed by the
+ * University of California, Berkeley and its contributors'' in the
+ * documentation or other materials provided with the distribution and in
+ * all advertising materials mentioning features or use of this software.
+ * Neither the name of the University nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)lex.c      5.21 (Berkeley) 6/25/90";
+#endif /* not lint */

 
 #include "rcv.h"
 
 #include "rcv.h"

+#include <sys/stat.h>
+#include <errno.h>

 
 /*
  * Mail -- a mail program
 
 /*
  * Mail -- a mail program


@@ -8,48 +31,69 @@
  * Lexical processing of commands.
  */
 
  * Lexical processing of commands.
  */
 

-static char *SccsId = "@(#)lex.c       1.3 %G%";
+char   *prompt = "& ";

 
 /*
  * Set up editing on the given file name.
 
 /*
  * Set up editing on the given file name.

- * If isedit is true, we are considered to be editing the file,
- * otherwise we are reading our mail which has signficance for
- * mbox and so forth.
+ * If the first character of name is %, we are considered to be
+ * editing the file, otherwise we are reading our mail which has
+ * signficance for mbox and so forth.

  */
  */

-
-setfile(name, isedit)
+setfile(name)

        char *name;
 {
        FILE *ibuf;
        int i;
        char *name;
 {
        FILE *ibuf;
        int i;

+       struct stat stb;
+       char isedit = *name != '%';
+       char *who = name[1] ? name + 1 : myname;

        static int shudclob;
        static int shudclob;

-       static char efile[128];

        extern char tempMesg[];
        extern char tempMesg[];

-       int (*sigs[2])();
+       extern int errno;
+
+       if ((name = expand(name)) == NOSTR)
+               return -1;

 
 

-       if ((ibuf = fopen(name, "r")) == NULL) {
-               if (isedit)
-                       perror(name);
-               else
-                       printf("No mail for %s\n", myname);
+       if ((ibuf = Fopen(name, "r")) == NULL) {
+               if (!isedit && errno == ENOENT)
+                       goto nomail;
+               perror(name);

                return(-1);
        }
 
                return(-1);
        }
 

+       if (fstat(fileno(ibuf), &stb) < 0) {
+               perror("fstat");
+               Fclose(ibuf);
+               return (-1);
+       }
+
+       switch (stb.st_mode & S_IFMT) {
+       case S_IFDIR:
+               Fclose(ibuf);
+               errno = EISDIR;
+               perror(name);
+               return (-1);
+
+       case S_IFREG:
+               break;
+
+       default:
+               Fclose(ibuf);
+               errno = EINVAL;
+               perror(name);
+               return (-1);
+       }
+

        /*
         * Looks like all will be well.  We must now relinquish our
        /*
         * Looks like all will be well.  We must now relinquish our

-        * hold on the current set of stuff.  Must ignore signals
+        * hold on the current set of stuff.  Must hold signals

         * while we are reading the new file, else we will ruin
         * the message[] data structure.
         */
 
         * while we are reading the new file, else we will ruin
         * the message[] data structure.
         */
 

-       for (i = SIGINT; i <= SIGQUIT; i++)
-               sigs[i - SIGINT] = signal(i, SIG_IGN);
-       if (shudclob) {
-               if (edit)
-                       edstop();
-               else
-                       quit();
-       }
+       holdsigs();
+       if (shudclob)
+               quit();

 
        /*
         * Copy the messages into /tmp
 
        /*
         * Copy the messages into /tmp


@@ -67,8 +111,9 @@ setfile(name, isedit)
        }
        shudclob = 1;
        edit = isedit;
        }
        shudclob = 1;
        edit = isedit;

-       strncpy(efile, name, 128);
-       editfile = efile;
+       strcpy(prevfile, mailname);
+       if (name != mailname)
+               strcpy(mailname, name);

        mailsize = fsize(ibuf);
        if ((otf = fopen(tempMesg, "w")) == NULL) {
                perror(tempMesg);
        mailsize = fsize(ibuf);
        if ((otf = fopen(tempMesg, "w")) == NULL) {
                perror(tempMesg);


@@ -81,95 +126,62 @@ setfile(name, isedit)
        remove(tempMesg);
        setptr(ibuf);
        setmsize(msgCount);
        remove(tempMesg);
        setptr(ibuf);
        setmsize(msgCount);

-       fclose(ibuf);
-       for (i = SIGINT; i <= SIGQUIT; i++)
-               signal(i, sigs[i - SIGINT]);
-       printf("%s: ", name);
-       announce(!edit);
+       Fclose(ibuf);
+       relsesigs();
+       sawcom = 0;
+       if (!edit && msgCount == 0) {
+nomail:
+               fprintf(stderr, "No mail for %s\n", who);
+               return -1;
+       }

        return(0);
 }
 
        return(0);
 }
 

+int    *msgvec;
+int    reset_on_stop;                  /* do a reset() if stopped */
+

 /*
  * Interpret user commands one by one.  If standard input is not a tty,
  * print no prompt.
  */
 /*
  * Interpret user commands one by one.  If standard input is not a tty,
  * print no prompt.
  */

-
-int    *msgvec;
-

 commands()
 {
 commands()
 {

-       int prompt, firstsw, stop();
+       int eofloop = 0;

        register int n;
        char linebuf[LINESIZE];
        register int n;
        char linebuf[LINESIZE];

-
-       if (rcvmode)
-               if (signal(SIGINT, SIG_IGN) == SIG_DFL)
-                       signal(SIGINT, stop);
-       input = stdin;
-       prompt = 1;
-       if (!intty)
-               prompt = 0;
-       firstsw = 1;
+       int intr(), stop(), hangup(), contin();
+
+       if (!sourcing) {
+               if (signal(SIGINT, SIG_IGN) != SIG_IGN)
+                       signal(SIGINT, intr);
+               if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
+                       signal(SIGHUP, hangup);
+               signal(SIGTSTP, stop);
+               signal(SIGTTOU, stop);
+               signal(SIGTTIN, stop);
+       }
+       setexit();

        for (;;) {
        for (;;) {

-               setexit();
-               if (firstsw > 0) {
-                       firstsw = 0;
-                       source1(mailrc);
-                       if (!nosrc)
-                               source1(MASTER);
-               }
-
-               /*
-                * How's this for obscure:  after we
-                * finish sourcing for the first time,
-                * go off and print the headers!
-                */
-
-#ifdef CRAZYWOW
-               if (firstsw == 0 && !sourcing) {
-                       firstsw = -1;
-                       if (rcvmode)
-                               announce(1);
-               }
-#endif
-

                /*
                 * Print the prompt, if needed.  Clear out
                 * string space, and flush the output.
                 */
                /*
                 * Print the prompt, if needed.  Clear out
                 * string space, and flush the output.
                 */

-
-               if (!rcvmode && !sourcing)
-                       return;
-top:
-               if (prompt && !sourcing)
-                       printf("_\r");
-               flush();
+               if (!sourcing && value("interactive") != NOSTR) {
+                       reset_on_stop = 1;
+                       printf(prompt);
+               }
+               fflush(stdout);

                sreset();
                sreset();

-

                /*
                 * Read a line of commands from the current input
                 * and handle end of file specially.
                 */
                /*
                 * Read a line of commands from the current input
                 * and handle end of file specially.
                 */

-

                n = 0;
                for (;;) {
                n = 0;
                for (;;) {

-                       if (readline(input, &linebuf[n]) <= 0) {
-                               if (n != 0)
-                                       break;
-                               if (sourcing) {
-                                       unstack();
-                                       goto more;
-                               }
-                               if (value("ignoreeof") != NOSTR && prompt) {
-                                       printf("Use \"quit\" to quit.\n");
-                                       goto top;
-                               }
-                               if (!edit) {
-                                       signal(SIGINT, SIG_IGN);
-                                       return;
-                               }
-                               edstop();
-                               return;
+                       if (readline(input, &linebuf[n], LINESIZE - n) < 0) {
+                               if (n == 0)
+                                       n = -1;
+                               break;

                        }
                        if ((n = strlen(linebuf)) == 0)
                                break;
                        }
                        if ((n = strlen(linebuf)) == 0)
                                break;


@@ -178,19 +190,37 @@ top:
                                break;
                        linebuf[n++] = ' ';
                }
                                break;
                        linebuf[n++] = ' ';
                }

-               if (execute(linebuf))
-                       return;
-more:          ;
+               reset_on_stop = 0;
+               if (n < 0) {
+                               /* eof */
+                       if (loading)
+                               break;
+                       if (sourcing) {
+                               unstack();
+                               continue;
+                       }
+                       if (value("interactive") != NOSTR &&
+                           value("ignoreeof") != NOSTR &&
+                           ++eofloop < 25) {
+                               printf("Use \"quit\" to quit.\n");
+                               continue;
+                       }
+                       break;
+               }
+               eofloop = 0;
+               if (execute(linebuf, 0))
+                       break;

        }
 }
 
 /*
        }
 }
 
 /*

- * Execute a single command.  If the command executed
- * is "quit," then return non-zero so that the caller
- * will know to return back to main, if he cares.
+ * Execute a single command.
+ * Command functions return 0 for success, 1 for error, and -1
+ * for abort.  A 1 or -1 aborts a load or source.  A -1 aborts
+ * the interactive command loop.
+ * Contxt is non-zero if called while composing mail.

  */
  */

-
-execute(linebuf)
+execute(linebuf, contxt)

        char linebuf[];
 {
        char word[LINESIZE];
        char linebuf[];
 {
        char word[LINESIZE];


@@ -199,7 +229,7 @@ execute(linebuf)
        register char *cp, *cp2;
        register int c;
        int muvec[2];
        register char *cp, *cp2;
        register int c;
        int muvec[2];

-       int edstop(), e;
+       int e = 1;

 
        /*
         * Strip the white space away from the beginning
 
        /*
         * Strip the white space away from the beginning


@@ -210,20 +240,18 @@ execute(linebuf)
         * lexical conventions.
         */
 
         * lexical conventions.
         */
 

-       cp = linebuf;
-       while (any(*cp, " \t"))
-               cp++;
+       for (cp = linebuf; isspace(*cp); cp++)
+               ;

        if (*cp == '!') {
                if (sourcing) {
                        printf("Can't \"!\" while sourcing\n");
        if (*cp == '!') {
                if (sourcing) {
                        printf("Can't \"!\" while sourcing\n");

-                       unstack();
-                       return(0);
+                       goto out;

                }
                shell(cp+1);
                return(0);
        }
        cp2 = word;
                }
                shell(cp+1);
                return(0);
        }
        cp2 = word;

-       while (*cp && !any(*cp, " \t0123456789$^./-+*'\""))
+       while (*cp && index(" \t0123456789$^.:/-+*'\"", *cp) == NOSTR)

                *cp2++ = *cp++;
        *cp2 = '\0';
 
                *cp2++ = *cp++;
        *cp2 = '\0';
 


@@ -235,30 +263,22 @@ execute(linebuf)
         * confusion.
         */
 
         * confusion.
         */
 

-       if (sourcing && equal(word, ""))
+       if (sourcing && *word == '\0')

                return(0);
        com = lex(word);
        if (com == NONE) {
                return(0);
        com = lex(word);
        if (com == NONE) {

-               printf("What?\n");
-               if (sourcing)
-                       unstack();
-               return(0);
+               printf("Unknown command: \"%s\"\n", word);
+               goto out;

        }
 
        /*
        }
 
        /*

-        * Special case so that quit causes a return to
-        * main, who will call the quit code directly.
-        * If we are in a source file, just unstack.
+        * See if we should execute the command -- if a conditional
+        * we always execute it, otherwise, check the state of cond.

         */
 
         */
 

-       if (com->c_func == edstop && sourcing) {
-               unstack();
-               return(0);
-       }
-       if (!edit && com->c_func == edstop) {
-               signal(SIGINT, SIG_IGN);
-               return(1);
-       }
+       if ((com->c_argtype & F) == 0)
+               if (cond == CRCV && !rcvmode || cond == CSEND && rcvmode)
+                       return(0);

 
        /*
         * Process the arguments to the command, depending
 
        /*
         * Process the arguments to the command, depending


@@ -270,29 +290,32 @@ execute(linebuf)
        if (!rcvmode && (com->c_argtype & M) == 0) {
                printf("May not execute \"%s\" while sending\n",
                    com->c_name);
        if (!rcvmode && (com->c_argtype & M) == 0) {
                printf("May not execute \"%s\" while sending\n",
                    com->c_name);

-               unstack();
-               return(0);
+               goto out;

        }
        if (sourcing && com->c_argtype & I) {
                printf("May not execute \"%s\" while sourcing\n",
                    com->c_name);
        }
        if (sourcing && com->c_argtype & I) {
                printf("May not execute \"%s\" while sourcing\n",
                    com->c_name);

-               unstack();
-               return(0);
+               goto out;

        }
        if (readonly && com->c_argtype & W) {
                printf("May not execute \"%s\" -- message file is read only\n",
                   com->c_name);
        }
        if (readonly && com->c_argtype & W) {
                printf("May not execute \"%s\" -- message file is read only\n",
                   com->c_name);

-               if (sourcing)
-                       unstack();
-               return(0);
+               goto out;

        }
        }

-       e = 1;
-       switch (com->c_argtype & ~(P|I|M|W)) {
+       if (contxt && com->c_argtype & R) {
+               printf("Cannot recursively invoke \"%s\"\n", com->c_name);
+               goto out;
+       }
+       switch (com->c_argtype & ~(F|P|I|M|T|W|R)) {

        case MSGLIST:
                /*
                 * A message list defaulting to nearest forward
                 * legal message.
                 */
        case MSGLIST:
                /*
                 * A message list defaulting to nearest forward
                 * legal message.
                 */

+               if (msgvec == 0) {
+                       printf("Illegal use of \"message list\"\n");
+                       break;
+               }

                if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
                        break;
                if (c  == 0) {
                if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
                        break;
                if (c  == 0) {


@@ -312,6 +335,10 @@ execute(linebuf)
                 * A message list with no defaults, but no error
                 * if none exist.
                 */
                 * A message list with no defaults, but no error
                 * if none exist.
                 */

+               if (msgvec == 0) {
+                       printf("Illegal use of \"message list\"\n");
+                       break;
+               }

                if (getmsglist(cp, msgvec, com->c_msgflag) < 0)
                        break;
                e = (*com->c_func)(msgvec);
                if (getmsglist(cp, msgvec, com->c_msgflag) < 0)
                        break;
                e = (*com->c_func)(msgvec);


@@ -322,7 +349,7 @@ execute(linebuf)
                 * Just the straight string, with
                 * leading blanks removed.
                 */
                 * Just the straight string, with
                 * leading blanks removed.
                 */

-               while (any(*cp, " \t"))
+               while (isspace(*cp))

                        cp++;
                e = (*com->c_func)(cp);
                break;
                        cp++;
                e = (*com->c_func)(cp);
                break;


@@ -331,7 +358,8 @@ execute(linebuf)
                /*
                 * A vector of strings, in shell style.
                 */
                /*
                 * A vector of strings, in shell style.
                 */

-               if ((c = getrawlist(cp, arglist)) < 0)
+               if ((c = getrawlist(cp, arglist,
+                               sizeof arglist / sizeof *arglist)) < 0)

                        break;
                if (c < com->c_minargs) {
                        printf("%s requires at least %d arg(s)\n",
                        break;
                if (c < com->c_minargs) {
                        printf("%s requires at least %d arg(s)\n",


@@ -358,22 +386,27 @@ execute(linebuf)
                panic("Unknown argtype");
        }
 
                panic("Unknown argtype");
        }
 

+out:

        /*
         * Exit the current source file on
         * error.
         */
        /*
         * Exit the current source file on
         * error.
         */

-
-       if (e && sourcing)
-               unstack();
-       if (com->c_func == edstop)
-               return(1);
+       if (e) {
+               if (e < 0)
+                       return 1;
+               if (loading)
+                       return 1;
+               if (sourcing)
+                       unstack();
+               return 0;
+       }

        if (value("autoprint") != NOSTR && com->c_argtype & P)
                if ((dot->m_flag & MDELETED) == 0) {
                        muvec[0] = dot - &message[0] + 1;
                        muvec[1] = 0;
                        type(muvec);
                }
        if (value("autoprint") != NOSTR && com->c_argtype & P)
                if ((dot->m_flag & MDELETED) == 0) {
                        muvec[0] = dot - &message[0] + 1;
                        muvec[1] = 0;
                        type(muvec);
                }

-       if (!sourcing)
+       if (!sourcing && (com->c_argtype & T) == 0)

                sawcom = 1;
        return(0);
 }
                sawcom = 1;
        return(0);
 }


@@ -386,8 +419,8 @@ execute(linebuf)
 setmsize(sz)
 {
 
 setmsize(sz)
 {
 

-       if (msgvec != (int *) 0)
-               cfree(msgvec);
+       if (msgvec != 0)
+               cfree((char *) msgvec);

        msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec);
 }
 
        msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec);
 }
 


@@ -428,87 +461,173 @@ isprefix(as1, as2)
 }
 
 /*
 }
 
 /*

- * The following gets called on receipt of a rubout.  This is
+ * The following gets called on receipt of an interrupt.  This is

  * to abort printout of a command, mainly.
  * Dispatching here when command() is inactive crashes rcv.
  * Close all open files except 0, 1, 2, and the temporary.
  * to abort printout of a command, mainly.
  * Dispatching here when command() is inactive crashes rcv.
  * Close all open files except 0, 1, 2, and the temporary.

- * The special call to getuserid() is needed so it won't get
- * annoyed about losing its open file.

  * Also, unstack all source files.
  */
 
  * Also, unstack all source files.
  */
 

-stop()
+int    inithdr;                        /* am printing startup headers */
+
+/*ARGSUSED*/
+intr(s)

 {
 {

-       register FILE *fp;

 
        noreset = 0;
 
        noreset = 0;

-       signal(SIGINT, SIG_IGN);
-       sawcom++;
+       if (!inithdr)
+               sawcom++;
+       inithdr = 0;

        while (sourcing)
                unstack();
        while (sourcing)
                unstack();

-       getuserid((char *) -1);
-       for (fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) {
-               if (fp == stdin || fp == stdout)
-                       continue;
-               if (fp == itf || fp == otf)
-                       continue;
-               if (fp == stderr)
-                       continue;
-               if (fp == pipef) {
-                       pclose(pipef);
-                       pipef = NULL;
-                       continue;
-               }
-               fclose(fp);
-       }
+
+       close_all_files();
+

        if (image >= 0) {
                close(image);
                image = -1;
        }
        if (image >= 0) {
                close(image);
                image = -1;
        }

-       clrbuf(stdout);
-       printf("Interrupt\n");
-       signal(SIGINT, stop);
+       fprintf(stderr, "Interrupt\n");

        reset(0);
 }
 
        reset(0);
 }
 

+/*
+ * When we wake up after ^Z, reprint the prompt.
+ */
+stop(s)
+{
+       sig_t old_action = signal(s, SIG_DFL);
+
+       sigsetmask(sigblock(0) & ~sigmask(s));
+       kill(0, s);
+       sigblock(sigmask(s));
+       signal(s, old_action);
+       if (reset_on_stop) {
+               reset_on_stop = 0;
+               reset(0);
+       }
+}
+
+/*
+ * Branch here on hangup signal and simulate "exit".
+ */
+/*ARGSUSED*/
+hangup(s)
+{
+
+       /* nothing to do? */
+       exit(1);
+}
+

 /*
  * Announce the presence of the current Mail version,
  * give the message count, and print a header listing.
  */
 
 /*
  * Announce the presence of the current Mail version,
  * give the message count, and print a header listing.
  */
 

-char   *greeting       = "Mail version 2.0 %s.  Type ? for help.\n";
+announce()
+{
+       int vec[2], mdot;
+
+       mdot = newfileinfo();
+       vec[0] = mdot;
+       vec[1] = 0;
+       dot = &message[mdot - 1];
+       if (msgCount > 0 && value("noheader") == NOSTR) {
+               inithdr++;
+               headers(vec);
+               inithdr = 0;
+       }
+}

 
 

-announce(pr)
+/*
+ * Announce information about the file we are editing.
+ * Return a likely place to set dot.
+ */
+newfileinfo()

 {
 {

-       int vec[2];
-       extern char *version;

        register struct message *mp;
        register struct message *mp;

+       register int u, n, mdot, d, s;
+       char fname[BUFSIZ], zname[BUFSIZ], *ename;

 
 

-       if (value("hold") != NOSTR)
+       for (mp = &message[0]; mp < &message[msgCount]; mp++)
+               if (mp->m_flag & MNEW)
+                       break;
+       if (mp >= &message[msgCount])

                for (mp = &message[0]; mp < &message[msgCount]; mp++)
                for (mp = &message[0]; mp < &message[msgCount]; mp++)

-                       mp->m_flag |= MPRESERVE;
-       vec[0] = 1;
-       vec[1] = 0;
-       if (pr && value("quiet") == NOSTR)
-               printf(greeting, version);
+                       if ((mp->m_flag & MREAD) == 0)
+                               break;
+       if (mp < &message[msgCount])
+               mdot = mp - &message[0] + 1;
+       else
+               mdot = 1;
+       s = d = 0;
+       for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) {
+               if (mp->m_flag & MNEW)
+                       n++;
+               if ((mp->m_flag & MREAD) == 0)
+                       u++;
+               if (mp->m_flag & MDELETED)
+                       d++;
+               if (mp->m_flag & MSAVED)
+                       s++;
+       }
+       ename = mailname;
+       if (getfold(fname) >= 0) {
+               strcat(fname, "/");
+               if (strncmp(fname, mailname, strlen(fname)) == 0) {
+                       sprintf(zname, "+%s", mailname + strlen(fname));
+                       ename = zname;
+               }
+       }
+       printf("\"%s\": ", ename);

        if (msgCount == 1)
                printf("1 message");
        else
                printf("%d messages", msgCount);
        if (msgCount == 1)
                printf("1 message");
        else
                printf("%d messages", msgCount);

+       if (n > 0)
+               printf(" %d new", n);
+       if (u-n > 0)
+               printf(" %d unread", u);
+       if (d > 0)
+               printf(" %d deleted", d);
+       if (s > 0)
+               printf(" %d saved", s);

        if (readonly)
                printf(" [Read only]");
        printf("\n");
        if (readonly)
                printf(" [Read only]");
        printf("\n");

-       headers(vec);
+       return(mdot);

 }
 
 }
 

-strace() {}
-

 /*
  * Print the current version number.
  */
 
 /*
  * Print the current version number.
  */
 

+/*ARGSUSED*/

 pversion(e)
 {
 pversion(e)
 {

-       printf(greeting, version);
+       extern char *version;
+
+       printf("Version %s\n", version);

        return(0);
 }
        return(0);
 }

+
+/*
+ * Load a file of user definitions.
+ */
+load(name)
+       char *name;
+{
+       register FILE *in, *oldin;
+
+       if ((in = Fopen(name, "r")) == NULL)
+               return;
+       oldin = input;
+       input = in;
+       loading = 1;
+       sourcing = 1;
+       commands();
+       loading = 0;
+       sourcing = 0;
+       input = oldin;
+       Fclose(in);
+}