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Add support for ~_, ~x, ~i, ~a, ~A, ~<, and ~r! tilde-escapes. Improve
tilde-escapes documentation. Mostly obtained from: NetBSD
This commit is contained in:
Mike Heffner
parent
1fc841e3ab
commit
69131e4050
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=88428
@ -47,6 +47,7 @@ static const char rcsid[] =
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*/
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#include "rcv.h"
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#include <fcntl.h>
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#include "extern.h"
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/*
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@ -213,6 +214,7 @@ collect(hp, printheaders)
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shell(&linebuf[2]);
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break;
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case ':':
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case '_':
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/*
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* Escape to command mode, but be nice!
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*/
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@ -231,6 +233,11 @@ collect(hp, printheaders)
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hadintr++;
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collint(SIGINT);
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exit(1);
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case 'x':
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/*
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* Exit, do not save in dead.letter.
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*/
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goto err;
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case 'h':
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/*
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* Grab a bunch of headers.
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@ -269,18 +276,52 @@ collect(hp, printheaders)
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break;
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case 'b':
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/*
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* Add stuff to blind carbon copies list.
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* Add to the BCC list.
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*/
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hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC));
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break;
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case 'i':
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case 'A':
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case 'a':
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/*
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* Insert named variable in message
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*/
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switch(c) {
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case 'i':
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cp = &linebuf[2];
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while(isspace((unsigned char)*cp))
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cp++;
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break;
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case 'a':
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cp = "sign";
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break;
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case 'A':
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cp = "Sign";
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break;
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default:
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goto err;
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}
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if(*cp != '\0' && (cp = value(cp)) != NULL) {
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printf("%s\n", cp);
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if(putline(collf, cp, 1) < 0)
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goto err;
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}
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break;
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case 'd':
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if (strlcpy(linebuf + 2, getdeadletter(), sizeof(linebuf) - 2)
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/*
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* Read in the dead letter file.
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*/
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if (strlcpy(linebuf + 2, getdeadletter(),
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sizeof(linebuf) - 2)
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>= sizeof(linebuf) - 2) {
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printf("Line buffer overflow\n");
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break;
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}
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/* fall into . . . */
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/* FALLTHROUGH */
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case 'r':
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case '<':
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/*
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* Invoke a file:
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* Search for the file name,
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@ -296,11 +337,55 @@ collect(hp, printheaders)
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cp = expand(cp);
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if (cp == NULL)
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break;
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if (isdir(cp)) {
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if (*cp == '!') {
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/*
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* Insert stdout of command.
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*/
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char *sh;
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int nullfd, tempfd, rc;
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char tempname2[PATHSIZE];
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if ((nullfd = open("/dev/null", O_RDONLY, 0))
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== -1) {
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warn("/dev/null");
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break;
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}
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(void)snprintf(tempname2, sizeof(tempname2),
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"%s/mail.ReXXXXXXXXXX", tmpdir);
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if ((tempfd = mkstemp(tempname2)) == -1 ||
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(fbuf = Fdopen(tempfd, "w+")) == NULL) {
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warn("%s", tempname2);
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break;
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}
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(void)unlink(tempname2);
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if ((sh = value("SHELL")) == NULL)
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sh = _PATH_CSHELL;
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rc = run_command(sh, 0, nullfd, fileno(fbuf),
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"-c", cp+1, NULL);
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close(nullfd);
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if (rc < 0) {
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(void)Fclose(fbuf);
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break;
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}
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if (fsize(fbuf) == 0) {
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fprintf(stderr,
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"No bytes from command \"%s\"\n",
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cp+1);
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(void)Fclose(fbuf);
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break;
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}
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rewind(fbuf);
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} else if (isdir(cp)) {
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printf("%s: Directory\n", cp);
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break;
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}
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if ((fbuf = Fopen(cp, "r")) == NULL) {
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} else if ((fbuf = Fopen(cp, "r")) == NULL) {
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warn("%s", cp);
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break;
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}
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@ -728,12 +728,14 @@ is somewhat of a misnomer since the actual escape character can be set
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by the option
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.Ic escape .
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.Bl -tag -width Ds
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.It Ic \&~! Ns Ar command
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Execute the indicated shell command, then return to the message.
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.It Ic \&~b Ns Ar name ...
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.It Ic \&~a
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Inserts the autograph string from the sign= option into the message.
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.It Ic \&~A
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Inserts the autograph string from the Sign= option into the message.
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.It Ic \&~b Ar name ...
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Add the given names to the list of carbon copy recipients but do not make
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the names visible in the Cc: line ("blind" carbon copy).
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.It Ic \&~c Ns Ar name ...
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.It Ic \&~c Ar name ...
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Add the given names to the list of carbon copy recipients.
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.It Ic \&~d
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Read the file
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@ -744,7 +746,7 @@ Invoke the text editor on the message collected so far.
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After the
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editing session is finished, you may continue appending text to the
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message.
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.It Ic \&~f Ns Ar messages
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.It Ic \&~f Ar messages
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Read the named messages into the message being sent.
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If no messages are specified, read in the current message.
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Message headers currently being ignored (by the
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@ -752,7 +754,7 @@ Message headers currently being ignored (by the
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or
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.Ic retain
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command) are not included.
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.It Ic \&~F Ns Ar messages
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.It Ic \&~F Ar messages
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Identical to
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.Ic \&~f ,
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except all message headers are included.
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@ -760,7 +762,9 @@ except all message headers are included.
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Edit the message header fields by typing each one in turn and allowing
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the user to append text to the end or modify the field by using the
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current terminal erase and kill characters.
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.It Ic \&~m Ns Ar messages
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.It Ic \&~i Ar string
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Inserts the value of the named option into the text of the message.
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.It Ic \&~m Ar messages
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Read the named messages into the message being sent, indented by a
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tab or by the value of
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.Ar indentprefix .
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@ -771,7 +775,7 @@ Message headers currently being ignored (by the
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or
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.Ic retain
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command) are not included.
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.It Ic \&~M Ns Ar messages
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.It Ic \&~M Ar messages
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Identical to
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.Ic \&~m ,
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except all message headers are included.
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@ -784,15 +788,19 @@ Abort the message being sent, copying the message to
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in your home directory if
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.Ic save
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is set.
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.It Ic \&~r Ns Ar filename
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.It Ic \&~r Ar filename , Ic \&~r Ar !command
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.It Ic \&~< Ar filename , Ic \&~< Ar !command
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Read the named file into the message.
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.It Ic \&~R Ns Ar string
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If the argument begins with a !,
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the rest of the string is taken as an arbitrary system command and is
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executed, with the standard output inserted into the message.
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.It Ic \&~R Ar string
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Use
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.Ar string
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as the Reply-To field.
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.It Ic \&~s Ns Ar string
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.It Ic \&~s Ar string
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Cause the named string to become the current subject field.
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.It Ic \&~\&t Ns Ar name ...
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.It Ic \&~\&t Ar name ...
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Add the given names to the direct recipient list.
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.It Ic \&~\&v
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Invoke an alternative editor (defined by the
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@ -803,9 +811,13 @@ Usually, the alternative editor will be a
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screen editor.
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After you quit the editor, you may resume appending
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text to the end of your message.
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.It Ic \&~w Ns Ar filename
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.It Ic \&~w Ar filename
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Write the message onto the named file.
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.It Ic \&~\&| Ns Ar command
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.It Ic \&~x
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Exits as with \&~q, except the message is not saved in dead.letter.
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.It Ic \&~! Ar command
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Execute the indicated shell command, then return to the message.
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.It Ic \&~\&| Ar command , Ic \&~^ Ar command
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Pipe the message through the command as a filter.
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If the command gives
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no output or terminates abnormally, retain the original text of the
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@ -815,10 +827,10 @@ The command
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is often used as
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.Ic command
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to rejustify the message.
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.It Ic \&~: Ns Ar mail-command
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.It Ic \&~: Ar mail-command , Ic \&~_ Ar mail-command
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Execute the given mail command.
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Not all commands, however, are allowed.
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.It Ic \&~~ Ns Ar string
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.It Ic \&~~ Ar string
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Insert the string of text in the message prefaced by a single ~.
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If
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you have changed the escape character, then you should double
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@ -1,23 +1,37 @@
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-----------------------------------------------------------
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The following ~ escapes are defined:
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~? Print this message
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~~ Quote a single tilde
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~. Same as .
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~A Equivalent to: ~i Sign
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~a Equivalent to: ~i sign
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~b users Add users to "blind" cc list
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~c users Add users to cc list
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~C Dump core
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~d Read in dead.letter
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~e Edit the message buffer
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~f messages Read in messages
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~F messages Same as ~f, but keep all header lines
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~h Prompt for to list, subject and cc list
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~r file Read a file into the message buffer
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~p Print the message buffer
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~i name Insert the value of the named variable
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~m messages Read in messages, right shifted by a tab
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~M messages Same as ~m, but keep all header lines
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~p Print the message buffer
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~q Quit, save partial message in dead.letter
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~r file Read a file into the message buffer
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~r !command Insert the output of the command in the message
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~< file Same as ~r
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~< !command Same as ~r
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~R address Set reply-to
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~s subject Set subject
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~t users Add users to to list
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~t users Add users to the To list
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~v Invoke display editor on message
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~w file Write message onto file.
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~x Quit, do not save to dead.letter
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~? Print this message
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~!command Invoke the shell
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~|command Pipe the message through the command
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~! command Invoke the shell
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~| command Pipe the message through the command
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~^ command Same as ~|
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~_ mail-cmd Perform the command-level request
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~: mail-cmd Same as ~_
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-----------------------------------------------------------
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