From d548547d99c5cd72fa205ac2ba6347e672185db7 Mon Sep 17 00:00:00 2001
From: Christian Neukirchen <chneukirchen@gmail.com>
Date: Mon, 11 Jul 2016 21:50:04 +0200
Subject: [PATCH] add show

---
 Makefile   |  3 ++-
 blaze822.c | 16 ++++++++++++
 blaze822.h |  1 +
 show.c     | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 91 insertions(+), 1 deletion(-)
 create mode 100644 show.c

diff --git a/Makefile b/Makefile
index 2d66f29..b80b616 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,13 @@
 CFLAGS=-g -O1 -Wall -Wno-switch -Wextra -Wwrite-strings -fstack-protector-strong -D_FORTIFY_SOURCE=2
 
-ALL = scan thread hdr
+ALL = scan thread hdr show
 
 all: $(ALL)
 
 scan: blaze822.o scan.o fmt_rfc2047.o
 thread: blaze822.o thread.o
 hdr: blaze822.o hdr.o
+show: blaze822.o show.o
 
 clean: FRC
 	-rm -f $(ALL) *.o
diff --git a/blaze822.c b/blaze822.c
index f55c00d..3df50a8 100644
--- a/blaze822.c
+++ b/blaze822.c
@@ -376,3 +376,19 @@ blaze822_loop(int argc, char *argv[], void (*cb)(char *))
 
 	return i;
 }
+
+int
+blaze822_body(struct message *mesg, char *file)
+{
+	int fd = open(file, O_RDONLY);
+	if (fd < 0)
+		return fd;
+
+	if (lseek(fd, mesg->end - mesg->msg, SEEK_SET) < 0) {
+		perror("lseek");
+		close(fd);
+		return -1;
+	}
+
+	return fd;
+}
diff --git a/blaze822.h b/blaze822.h
index 15de6f5..5c77de0 100644
--- a/blaze822.h
+++ b/blaze822.h
@@ -6,6 +6,7 @@ struct message *blaze822(char *file);
 void blaze822_free(struct message *mesg);
 char *blaze822_hdr_(struct message *mesg, const char *hdr, size_t len);
 #define blaze822_hdr(mesg, hdr) blaze822_hdr_(mesg, "\0" hdr ":", 2+strlen((hdr)))
+int blaze822_body(struct message *mesg, char *file);
 
 int blaze822_loop(int, char **, void (*)(char *));
 
diff --git a/show.c b/show.c
new file mode 100644
index 0000000..aa7a29c
--- /dev/null
+++ b/show.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+#include <wchar.h>
+
+#include "blaze822.h"
+
+void
+printhdr(char *hdr)
+{
+	int uc = 1;
+
+	while (*hdr) {
+		putc(uc ? toupper(*hdr) : *hdr, stdout);
+		uc = (*hdr == '-');
+		hdr++;
+	}
+	putc(' ', stdout);
+}
+
+void
+show(char *file)
+{
+	struct message *msg;
+
+	msg = blaze822(file);
+	if (!msg)
+		return;
+
+	char fields[] = "\0from:\0subject:\0to:\0cc:\0date:\0";
+
+	// XXX custom field formatting
+
+	char *f, *v;
+	for (f = fields; f < fields + sizeof fields; f += strlen(f+1)+1) {
+		v = blaze822_hdr_(msg, f, strlen(f+1)+1);
+		if (v) {
+			printhdr(f+1);
+			printf("%s\n", v);
+		}
+	}
+
+	int fd = blaze822_body(msg, file);
+	if (fd < 0)
+		return;
+	
+	printf("\n");
+	fflush(stdout);
+
+	char buf[2048];
+	ssize_t rd;
+	// XXX skip initial lf here, convert crlf
+	// XXX do mime...
+	while ((rd = read(fd, buf, sizeof buf)))
+		write(1, buf, rd);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int i = blaze822_loop(argc-1, argv+1, show);
+
+	return 0;
+}