Serve directories (completely rewritten)

Makefile

@@ -1,5 +1,5 @@
 PROG=	filesrv
-SRCS=	filesrv.c
+SRCS=	filesrv.c respond.c
 
 CFLAGS=		-O2 -fstack-protector -D_FORTIFY_SOURCE=2 -pie -fPIE
 LDFLAGS=	-Wl,-z,now -Wl,-z,relro

README

@@ -1,37 +1,25 @@
 NAME
-	filesrv - single-file web server
+	filesrv - filesystem web server
 
 SYNOPSIS
-	filesrv [-l] [-p port] [-t timeout] file
+	filesrv [-d] [-p port] [-t timeout] [-u user] dir
 
 DESCRIPTION
-	filesrv is a single-file web server. It handles TCP connections serially
-	to avoid fork exhaustion during high traffic. The -p option specifies
-	the listening port. The default is to listen on port 8080.
+	filesrv is a filesystem web server. It responds with directory listings
+	or file contents based on the request path. The -d option daemonizes the
+	process. The -p option specifies the listening port, otherwise 8080 by
+	default. -t option specifies the read and write timeout, otherwise 10
+	seconds by default.
 
-	The -l option specifies that the input file requires lazy reading. This
-	is usually the case with large files which cannot be comfortably
-	pre-loaded. The default behavior is to memory-map the entire input file.
-
-	The -t option specifies the write timeout in seconds. A timeout of 0
-	waits indefinitely. The default timeout is 1 second.
-
-	filesrv will try to persist connection errors, and will continue to
-	accept connections after it encounters any errors. It does not read any
-	portion of the request data.
-
-	When sent SIGINT, filesrv will clean itself up and exit gracefully.
-
-	If given port 0, filesrv will print the port number assigned by the
-	kernel.
-
-	If filesrv is run with root privileges, it will chroot to the current
-	working directory after opening the input file.
+	The -u option causes filesrv to drop privileges to the specified user.
+	This is only available when filesrv is run as root. It is useful when
+	listening on a privileged lower port without needing persistent root
+	access.
 
 AUTHORS
 	filesrv was written by Esote.
 
 COPYRIGHT
-	Copyright (c) 2019 Esote. There is NO warranty. You may redistribute
+	Copyright (c) 2020 Esote. There is NO warranty. You may redistribute
 	this software under the terms of the GNU Affero General Public License.
 	For more information, see the LICENSE file.

TODO

@@ -0,0 +1,8 @@
+TODO:
+	handle HEAD requests
+
+	respond with last-modified header
+
+	handle content range requests
+
+	infer file MIME type using https://mimesniff.spec.whatwg.org/

filesrv.1

@@ -1,5 +1,5 @@
 .\"
-.\" Copyright (C) 2019  Esote
+.\" Copyright (C) 2020  Esote
 .\"
 .\" This program is free software: you can redistribute it and/or modify
 .\" it under the terms of the GNU Affero General Public License as published
@@ -14,67 +14,50 @@
 .\" You should have received a copy of the GNU Affero General Public License
 .\" along with this program.  If not, see <https://www.gnu.org/licenses/>.
 .\"
-.Dd $Mdocdate: December 9 2019 $
+.Dd $Mdocdate: January 30 2019 $
 .Dt FILESRV 1
 .Os
 .Sh NAME
 .Nm filesrv
-.Nd single-file web server
+.Nd filesystem web server
 .Sh SYNOPSIS
 .Nm filesrv
-.Op Fl l
+.Op Fl d
 .Op Fl p Ar port
 .Op Fl t Ar timeout
-file
+.Op Fl u Ar user
+dir
 .Sh DESCRIPTION
 .Nm filesrv
-is a single-file web server.
-It handles TCP connections serially to avoid fork exhaustion during high
-traffic.
+is a filesystem web server.
+It responds with directory listings or file contents based on the request path.
 The
-.Fl p
-option specifies the listening port.
-The default is to listen on port 8080.
-.Pp
-The
-.Fl l
-option specifies that the input file requires lazy reading.
-This is usually the case with large files which cannot be comfortably
-pre-loaded.
-The default behavior is to memory-map the entire input file.
-.Pp
+.Fl d
+option daemonizes the process.
 The
+.Fl p
+option specifies the listening port, otherwise 8080 by default.
 .Fl t
-option specifies the write timeout in seconds.
-A timeout of 0 waits indefinitely.
-The default timeout is 1 second.
+option specifies the read and write timeout, otherwise 10 seconds by default.
 .Pp
+The
+.Fl u
+option causes
 .Nm filesrv
-will try to persist connection errors, and will continue to accept connections
-after it encounters any errors.
-It does not read any portion of the request data.
-.Pp
-When sent
-.Dv SIGINT ,
-.Nm filesrv
-will clean itself up and exit gracefully.
-.Pp
-If given port 0,
-.Nm filesrv
-will print the port number assigned by the kernel.
-.Pp
-If
+to drop privileges to the specified user.
+This is only available when
 .Nm filesrv
-is run with root privileges, it will chroot to the current working directory
-after opening the input file.
+is run as root.
+It is useful when listening on a privileged lower port without needing
+persistent root access.
 .Sh AUTHORS
 .Nm filesrv
 was written by
 .An Esote .
 .Sh COPYRIGHT
 Copyright
 .Pq c
-2019 Esote.
+2020 Esote.
 There is NO warranty.
 You may redistribute this software under the terms of the GNU Affero General
 Public License.