beans

commit 53623d8cb7d97e3adc08f7f65a92b940dc2fa3e2
Author: Claudio Alessi <smoppy@gmail.com>
Date:   Sun,  6 Jan 2019 23:47:01 +0100

Working concept (very dirty).

Diffstat:
A
LICENSE
 | 
21
+++++++++++++++++++++
A
Makefile
 | 
57
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
beans.c
 | 
137
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
config.mk
 | 
25
+++++++++++++++++++++++++

4 files changed, 240 insertions(+), 0 deletions(-)
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,21 @@
+MIT/X Consortium License
+
+© 2019 Claudio Alessi <smoppy at gmail dot com>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/Makefile b/Makefile
@@ -0,0 +1,57 @@
+# beans - simple pastebin server
+# See LICENSE file for copyright and license details.
+
+include config.mk
+
+APPNAME=beans
+SRC = ${APPNAME}.c
+OBJ = ${SRC:.c=.o}
+
+all: options ${APPNAME}
+
+options:
+	@echo ${APPNAME} build options:
+	@echo "CFLAGS   = ${CFLAGS}"
+	@echo "LDFLAGS  = ${LDFLAGS}"
+	@echo "CC       = ${CC}"
+
+.c.o:
+	@echo CC $<
+	@${CC} -c ${CFLAGS} $<
+
+${OBJ}: config.mk
+
+${APPNAME}: ${OBJ}
+	@echo CC -o $@
+	@${CC} -o $@ ${OBJ} ${LDFLAGS}
+
+clean:
+	@echo cleaning
+	@rm -f ${APPNAME} ${OBJ} ${APPNAME}-${VERSION}.tar.gz
+
+dist: clean
+	@echo creating dist tarball
+	@mkdir -p ${APPNAME}-${VERSION}
+	@cp -R LICENSE Makefile README config.mk \
+		${APPNAME}.1 ${SRC} ${APPNAME}-${VERSION}
+	@tar -cf ${APPNAME}-${VERSION}.tar ${APPNAME}-${VERSION}
+	@gzip ${APPNAME}-${VERSION}.tar
+	@rm -rf ${APPNAME}-${VERSION}
+
+install: all
+	@echo installing executable file to ${DESTDIR}${PREFIX}/bin
+	@mkdir -p ${DESTDIR}${PREFIX}/bin
+	@cp -f ${APPNAME} ${DESTDIR}${PREFIX}/bin
+	@chmod 755 ${DESTDIR}${PREFIX}/bin/${APPNAME}
+	@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
+	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
+	@sed "s/VERSION/${VERSION}/g" < ${APPNAME}.1 > ${DESTDIR}${MANPREFIX}/man1/${APPNAME}.1
+	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/${APPNAME}.1
+
+uninstall:
+	@echo removing executable file from ${DESTDIR}${PREFIX}/bin
+	@rm -f ${DESTDIR}${PREFIX}/bin/${APPNAME}
+	@echo removing manual page from ${DESTDIR}${MANPREFIX}/man1
+	@rm -f ${DESTDIR}${MANPREFIX}/man1/${APPNAME}.1
+
+.PHONY: all options clean dist install uninstall
diff --git a/beans.c b/beans.c
@@ -0,0 +1,137 @@
+/* beans is a simple pastebin server */
+
+#include <errno.h>
+#include <netdb.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define PORT   "2023"
+#define BACKLOG 32 /* XXX What's a reasonable value? */
+#define BASEURI "https://paste.bitmanent.org/p"
+
+void
+die(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(1);
+}
+
+int
+bindon(char *port) {
+	struct addrinfo hints, *res;
+	int sd = 0, e;
+
+	memset(&hints, 0, sizeof hints);
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_PASSIVE;
+
+	if((e = getaddrinfo(NULL, port, &hints, &res)))
+		die("getaddrinfo(): %s\n", gai_strerror(e));
+	if((sd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1)
+		die("socket(): %s\n", strerror(errno));
+	if(bind(sd, res->ai_addr, res->ai_addrlen) == -1)
+		die("bind(): %s\n", strerror(errno));
+	if(listen(sd, BACKLOG) == -1)
+		die("listen(): %s\n", strerror(errno));
+	return sd;
+}
+
+void *
+ecalloc(size_t nmemb, size_t size) {
+	void *p;
+
+	if(!(p = calloc(nmemb, size)))
+		die("Cannot allocate memory.\n");
+	return p;
+}
+
+char *
+readall(int sd, int *len) {
+	char *buf;
+	int sz = 512, r, l = 0;
+
+	buf = ecalloc(1, sz);
+	while((r = read(sd, &buf[l], sz - l)) != -1) {
+		if(!r)
+			break;
+		l += r;
+		if(l == sz) {
+			sz *= 2;
+			if(!(buf = realloc(buf, sz)))
+				die("realloc()\n");
+		}
+	}
+	if(r == -1) {
+		free(buf);
+		return NULL;
+	}
+	if(len)
+		*len = l;
+	buf[l] = '\0';
+	return buf;
+}
+
+void
+sout(int sd, char *fmt, ...) {
+	va_list ap;
+	char buf[4096];
+	int sz;
+
+	va_start(ap, fmt);
+	sz = vsnprintf(buf, sizeof buf, fmt, ap);
+	va_end(ap);
+	send(sd, buf, sz, 0);
+}
+
+int
+main(int argc, char *argv[]) {
+	struct sockaddr_storage conn;
+	socklen_t size;
+	int sd, csd, len, tmpsd;
+	char tmpfn[64] = {0}, *buf, *p;
+
+	sd = bindon(PORT);
+	size = sizeof conn;
+	while(1) {
+		csd = accept(sd, (struct sockaddr *)&conn, &size);
+		if(csd == -1) {
+			fprintf(stderr, "accept(): %s", strerror(errno));
+			continue;
+		}
+		buf = readall(csd, &len);
+		if(!(buf && len)) {
+			sout(csd, "Nothing pasted.\n");
+			close(csd);
+			continue;
+		}
+		snprintf(tmpfn, sizeof tmpfn, "/tmp/beans.XXXXXX");
+		tmpsd = mkstemp(tmpfn);
+		if(tmpsd == -1) {
+			fprintf(stderr, "mkstemp()\n");
+			free(buf);
+			close(csd);
+			continue;
+		}
+		if(write(tmpsd, buf, len) == -1)
+			fprintf(stderr, "write(): %s\n", strerror(errno));
+		p = strchr(tmpfn, '.');
+		if(p && ++p)
+			sout(csd, "%s/%s\n", BASEURI, p);
+		else
+			sout(csd, "Paste error.\n");
+		close(csd);
+		close(tmpsd);
+		free(buf);
+	}
+	close(sd);
+	return 0;
+}
diff --git a/config.mk b/config.mk
@@ -0,0 +1,25 @@
+# beans - simple pastebin server
+VERSION = 0.1
+
+# Customize below to fit your system
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+# includes and libs
+INCS =
+LIBS =
+
+# flags
+CPPFLAGS = -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION=\"${VERSION}\"
+#CFLAGS   = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
+CFLAGS   = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS}
+LDFLAGS  = -s ${LIBS}
+
+# Solaris
+#CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"
+#LDFLAGS = ${LIBS}
+
+# compiler and linker
+CC = cc