Merge remote-tracking branch 'upstream/master'

GNUmakefile

@@ -17,18 +17,18 @@ PREFIX=/usr/local
 BINDIR=$(PREFIX)/bin
 MANDIR=$(PREFIX)/share/man
 
-ALL = maddr magrep mdate mdeliver mdirs mexport mflag mgenmid mhdr minc mlist mmime mpick mscan msed mseq mshow msort mthread
+ALL = maddr magrep mdate mdeliver mdirs mexport mflag mflow mgenmid mhdr minc mlist mmime mpick mscan msed mseq mshow msort mthread
 SCRIPT = mcolor mcom mless mmkdir mquote museragent
 
 all: $(ALL) museragent
 
 $(ALL) : % : %.o
-maddr magrep mdeliver mexport mflag mgenmid mhdr mpick mscan msed mshow \
+maddr magrep mdeliver mexport mflag mflow mgenmid mhdr mpick mscan msed mshow \
   msort mthread : blaze822.o mymemmem.o mytimegm.o
 maddr magrep mexport mflag mgenmid mhdr mlist mpick mscan msed mseq mshow msort \
   mthread : seq.o slurp.o
-maddr magrep mhdr mpick mscan mshow : rfc2047.o
-magrep mshow : rfc2045.o
+maddr magrep mflow mhdr mpick mscan mshow : rfc2047.o
+magrep mflow mshow : rfc2045.o
 mshow : filter.o safe_u8putstr.o rfc2231.o pipeto.o
 mscan : pipeto.o
 msort : mystrverscmp.o

NEWS.md

@@ -0,0 +1,17 @@
+## 0.2 (2017-07-17)
+
+* New sequence syntax `m:+n` for `n` messages after message `m`.
+* Threading shortcuts `=`, `_`, `^` for `.=`, `._`, `.^`.
+* Sequence related errors are now reported.
+* minc and mlist normalize slashes in paths.
+* mfwd now generates conforming message/rfc822 parts.
+* mthread can add optional folders (e.g. your outbox) to resolve message ids.
+* mcom now adds Date: just before sending or cancelling the mail.
+* VIOLATIONS.md documents how mblaze works with certain common mistakes.
+* Full documentation revamp by Larry Hynes.
+* Fix rare crash looking for mail body.
+* Numerous small bug and portability fixes.
+
+## 0.1 (2017-06-24)
+
+* Initial release

README

@@ -18,6 +18,7 @@ DESCRIPTION
      mdirs(1)     find Maildir folders
      mexport(1)   export Maildir folders as mailboxes
      mflag(1)     change flags (marks) of mail
+     mflow(1)     reflow format=flowed plain text mails
      mfwd(1)      forward mail
      mgenmid(1)   generate Message-IDs
      mhdr(1)      extract mail headers

VERSION

@@ -1 +1 @@
-0.1
+0.2

contrib/mverify

@@ -8,9 +8,9 @@
 mshow -t "$1" | awk -v "msg=$1" '
 { match($0, "^ *"); indent = RLENGTH }
 $2 == "text/plain" { plain++ }
-$2 == "multipart/signed" { signed = +$1; si = indent; next }
-signed && !content && indent == si+2 { content = +$1; next }
-signed && content && !signature && indent == si+2 { signature = +$1; type = $2 }
+$2 == "multipart/signed" { signed = 0+$1; si = indent; next }
+signed && !content && indent == si+2 { content = 0+$1; next }
+signed && content && !signature && indent == si+2 { signature = 0+$1; type = $2 }
 function q(a) { gsub("\\47", "\47\\\47\47", a); return "\47"a"\47" }
 END {
 	if (type == "" && plain) {  // guess plain text armored signature
@@ -26,7 +26,7 @@ END {
 		exit(system("mshow -r -O " q(msg) " " q(signed) \
 			" | openssl smime -verify"))
 	} else {
-		print("Cant verify signatures of type " type ".")
+		print("Cannot verify signatures of type " type ".")
 		exit(2)
 	}
 }

filter.c

@@ -1,9 +1,13 @@
+#include <sys/wait.h>
+
+#include <fcntl.h>
+#include <errno.h>
+#include <limits.h>
 #include <poll.h>	     
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/wait.h>
 #include <time.h>
 #include <unistd.h>
 
@@ -32,6 +36,10 @@ filter(char *input, size_t inlen, char *cmd, char **outputo, size_t *outleno)
 	if (pipe(pipe0) != 0 || pipe(pipe1) != 0)
 		goto fail;
 
+	int got = fcntl(pipe0[1], F_GETFL);
+	if (got > 0)
+		fcntl(pipe0[1], F_SETFL, got | O_NONBLOCK);
+
 	char *argv[] = { "/bin/sh", "-c", cmd, (char *)0 };
 
 	if (!(pid = fork())) {
@@ -88,7 +96,9 @@ filter(char *input, size_t inlen, char *cmd, char **outputo, size_t *outleno)
 				input += ret;
 				inlen -= ret;
 			}
-			if (ret <= 0 || inlen == 0)
+			if (ret <= 0 && errno == EAGAIN) {
+				/* ignore */
+			} else if (ret <= 0 || inlen == 0)
 				close(fds[1].fd);
 		} else if (fds[1].revents & (POLLERR | POLLHUP | POLLNVAL)) {
 			fds[1].fd = -1;

filter.example

@@ -1,3 +1,4 @@
+text/plain: mflow
 text/html: lynx -dump -stdin -nomargins ${PIPE_CHARSET:+-assume_charset $PIPE_CHARSET}
 application/pdf: pdftotext - - | par
 application: file -b -

man/mblaze.7

@@ -30,6 +30,8 @@ find Maildir folders
 export Maildir folders as mailboxes
 .It Xr mflag 1
 change flags (marks) of mail
+.It Xr mflow 1
+reflow format=flowed plain text mails
 .It Xr mfwd 1
 forward mail
 .It Xr mgenmid 1

man/mflow.1

@@ -0,0 +1,55 @@
+.Dd July 26, 2017
+.Dt MFLOW 1
+.Os
+.Sh NAME
+.Nm mflow
+.Nd reflow format=flowed plain text mails
+.Sh SYNOPSIS
+.Nm
+\&<
+.Ar file
+.Sh DESCRIPTION
+.Nm
+reformats the standard input according to the rules
+of RFC 3676.
+.Ev PIPE_CONTENTTYPE
+is inspected, making this a suitable filter
+for
+.Sq text/plain
+messages for
+.Xr mshow 1 .
+Mails not using
+.Sq format=flowed
+are output as is.
+.Pp
+Text is reflowed (where allowed) to
+fit the width given in the environment variable
+.Ev COLUMNS ,
+the terminal width, or 80 characters by default.
+.Pp
+If defined,
+the environment variable
+.Ev MAXCOLUMNS
+specifies the maximum line length.
+.Sh EXIT STATUS
+.Ex -std
+.Sh SEE ALSO
+.Xr mshow 1
+.Rs
+.%A R. Gellens
+.%D February 2004
+.%R RFC 3676
+.%T The Text/Plain Format and DelSp Parameters
+.Re
+.Sh AUTHORS
+.An Leah Neukirchen Aq Mt leah@vuxu.org
+.Sh LICENSE
+.Nm
+is in the public domain.
+.Pp
+To the extent possible under law,
+the creator of this work
+has waived all copyright and related or
+neighboring rights to this work.
+.Pp
+.Lk http://creativecommons.org/publicdomain/zero/1.0/

mcom

@@ -51,7 +51,7 @@ case "$0" in
 			shift
 			resume=1
 			if [ "$#" -gt 0 ]; then
-				echo "used dreaft $1"
+				echo "used draft $1"
 				draft="$1"
 				shift
 			fi

mflow.c

@@ -0,0 +1,187 @@
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "blaze822.h"
+
+int column = 0;
+int maxcolumn = 80;
+
+void
+chgquote(int quotes)
+{
+	static int oquotes;
+
+	if (quotes != oquotes) {
+		if (column)
+			putchar('\n');
+		column = 0;
+		oquotes = quotes;
+	}
+}
+
+void
+fixed(int quotes, char *line, size_t linelen)
+{
+	chgquote(quotes);
+
+	if (linelen > (size_t)(maxcolumn - column)) {
+		putchar('\n');
+		column = 0;
+	}
+
+	if (column == 0) {
+		for (; column < quotes; column++)
+			putchar('>');
+		if (quotes)
+			putchar(' ');
+	}
+
+	fwrite(line, 1, linelen, stdout);
+	putchar('\n');
+	column = 0;
+}
+
+void
+flowed(int quotes, char *line, ssize_t linelen)
+{
+	chgquote(quotes);
+	int done = 0;
+
+	while (!done) {
+		if (column == 0) {
+			for (; column < quotes; column++)
+				putchar('>');
+			column++;
+			if (quotes)
+				putchar(' ');
+		}
+
+		char *eow;
+		if (*line == ' ')
+			eow = memchr(line + 1, ' ', linelen - 1);
+		else
+			eow = memchr(line, ' ', linelen);
+
+		if (!eow) {
+			eow = line + linelen;
+			done = 1;
+		}
+
+		if (column + (eow - line) > maxcolumn) {
+			putchar('\n');
+			column = 0;
+			if (*line == ' ') {
+				line++;
+				linelen--;
+			}
+		} else {
+			fwrite(line, 1, eow - line, stdout);
+			column += eow - line;
+			linelen -= eow - line;
+			line = eow;
+		}
+	}
+}
+
+int
+main()
+{
+	char *linebuf = 0;
+	char *line;
+	size_t linelen = 0;
+	int quotes = 0;
+
+	int reflow = 1;  // re-evaluated on $PIPE_CONTENTTYPE
+	int delsp = 0;
+
+	char *ct = getenv("PIPE_CONTENTTYPE");
+	if (ct) {
+		char *s, *se;
+		blaze822_mime_parameter(ct, "format", &s, &se);
+		reflow = s && (strncasecmp(s, "flowed", 6) == 0);
+		blaze822_mime_parameter(ct, "delsp", &s, &se);
+		delsp = s && (strncasecmp(s, "yes", 3) == 0);
+	}
+
+	char *cols = getenv("COLUMNS");
+	if (cols && isdigit(*cols)) {
+		maxcolumn = atoi(cols);
+	} else {
+		struct winsize w;
+		int fd = open("/dev/tty", O_RDONLY | O_NOCTTY);
+		if (fd >= 0) {
+			if (ioctl(fd, TIOCGWINSZ, &w) == 0)
+				maxcolumn = w.ws_col;
+			close(fd);
+		}
+	}
+
+	char *maxcols = getenv("MAXCOLUMNS");
+	if (maxcols && isdigit(*maxcols)) {
+		int m = atoi(maxcols);
+		if (maxcolumn > m)
+			maxcolumn = m;
+	}
+
+	while (1) {
+		errno = 0;
+		ssize_t rd = getdelim(&linebuf, &linelen, '\n', stdin);
+		if (rd == -1) {
+			if (errno == 0)
+				break;
+			fprintf(stderr, "mflow: error reading: %s\n",
+			    strerror(errno));
+			exit(1);
+		}
+
+		line = linebuf;
+
+		if (!reflow) {
+			fwrite(line, 1, rd, stdout);
+			continue;
+		}
+
+		if (rd > 0 && line[rd-1] == '\n')
+                        line[--rd] = 0;
+		if (rd > 0 && line[rd-1] == '\r')
+                        line[--rd] = 0;
+		
+		quotes = 0;
+		while (*line == '>') {  // measure quote depth
+			line++;
+			quotes++;
+			rd--;
+		}
+
+		if (*line == ' ') {  // space stuffing
+			line++;
+			rd--;
+		}
+
+		if (strcmp(line, "-- ") == 0) {  // usenet signature convention
+			if (column)
+				fixed(quotes, "", 0);  // flush paragraph
+			fixed(quotes, line, rd);
+			continue;
+		}
+
+		if (rd > 0 && line[rd-1] == ' ') {  // flowed line
+			if (delsp)
+				line[--rd] = 0;
+			flowed(quotes, line, rd);
+		} else {
+			fixed(quotes, line, rd);
+		}
+	}
+
+	if (reflow && column != 0)
+		putchar('\n');
+}

mseq.c

@@ -252,6 +252,9 @@ stdinmode()
 void
 overridecur(char *file)
 {
+	static int once = 0;
+	if (once++)
+		return;
 	while (*file == ' ')
 		file++;
 	setenv("MAILDOT", file, 1);
@@ -260,6 +263,9 @@ overridecur(char *file)
 void
 setcur(char *file)
 {
+	static int once = 0;
+	if (once++)
+		return;
 	while (*file == ' ')
 		file++;
 	unsetenv("MAILDOT");

mshow.c

@@ -29,6 +29,8 @@ static char *hflag = defaulthflags;
 static char *xflag;
 static char *Oflag;
 
+static char fallback_ct[] = "text/plain";
+
 struct message *filters;
 
 static int mimecount;
@@ -182,7 +184,7 @@ render_mime(int depth, struct message *msg, char *body, size_t bodylen)
 {
 	char *ct = blaze822_hdr(msg, "content-type");
 	if (!ct)
-		ct = "text/x-unknown";
+		ct = fallback_ct;
 	char *mt = mimetype(ct);
 	char *tlmt = tlmimetype(ct);
 	char *filename = mime_filename(msg);
@@ -310,7 +312,7 @@ choose_alternative(struct message *msg, int depth)
 		m++;
 		char *ict = blaze822_hdr(imsg, "content-type");
 		if (!ict)
-			ict = "text/x-unknown";
+			ict = fallback_ct;
 		char *imt = mimetype(ict);
 
 		char *s = strstr(Aflag, imt);
@@ -367,7 +369,7 @@ list_mime(int depth, struct message *msg, char *body, size_t bodylen)
 
 	char *ct = blaze822_hdr(msg, "content-type");
 	if (!ct)
-		ct = "text/x-unknown";
+		ct = fallback_ct;
 	char *mt = mimetype(ct);
 	char *filename = mime_filename(msg);
 

rfc2047.c

@@ -75,7 +75,7 @@ blaze822_decode_b64(char *s, char *e, char **deco, size_t *decleno)
 		41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
 	};
 
-	char *buf = malloc((e - s) / 4 * 3);
+	char *buf = malloc((e - s) / 4 * 3 + 1);
 	if (!buf)
 		return 0;
 
@@ -118,6 +118,8 @@ error:
 		if (c3 != '=') *buf++ = d2;
 	}
 
+	*buf = 0;
+
 	*decleno = buf - *deco;
 	return 1;
 }