ttcpd

commit 8af8847355874ef9102203174cdc1d0904f20136
parent 1561f5b08353acf2e4d1408152db0bb0ff88036d
Author: finwo <finwo@pm.me>
Date:   Wed, 15 Nov 2017 19:34:42 +0100

Copied main code from finwo/bchroot

Diffstat:
A
.dep
 | 
4
++++
A
.gitignore
 | 
6
++++++
A
build/50-Makefile
 | 
2
++
A
src/main.c
 | 
58
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/.dep b/.dep
@@ -0,0 +1,4 @@
+AUTHOR="Robin Bron"
+NAME="tcpd"
+DEPS=()
+DEPS+=("cdeps/cc-simple")
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,6 @@
+*.o
+*.d
+*.swp
+/lib
+/Makefile
+/tcpd
diff --git a/build/50-Makefile b/build/50-Makefile
@@ -0,0 +1,2 @@
+tcpd: $(OBJS)
+	$(CC) $(OBJS) $(CFLAGS) -o $@
diff --git a/src/main.c b/src/main.c
@@ -0,0 +1,58 @@
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int error( char *str ) {
+  printf("%s\n", str);
+  exit(1);
+}
+
+int main( int argc, char **argv ) {
+  if(argc<3) error("Not enough arguments");
+  int i, port = 8080;
+  char *cmd = 0;
+  char **args = 0;
+  for(i=0;i<4&&i<argc;i++) {
+    switch(i) {
+      case 0: break;
+      case 1: port = atoi(*(argv+i)); break;
+      case 2: cmd=*(argv+i); break;
+      case 3: args=argv+i; break;
+    }
+  }
+
+  int sockfd = socket( AF_INET, SOCK_STREAM, 0 );
+  if(sockfd<0) error("socket");
+  struct sockaddr_in saddr, caddr;
+  bzero((char *) &saddr, sizeof(saddr));
+  saddr.sin_family      = AF_INET;
+  saddr.sin_addr.s_addr = INADDR_ANY;
+  saddr.sin_port        = htons(port);
+
+  if(bind(sockfd,(struct sockaddr *) &saddr, sizeof(saddr)) < 0) {
+    error("bind");
+  }
+
+  listen(sockfd,5);
+  printf("Listening on port %d\n", port);
+  socklen_t clen = sizeof(caddr);
+  int nsock;
+  while( (nsock=accept(sockfd,(struct sockaddr *) &caddr,&clen)) >= 0 ) {
+    if(fork()) {
+      close(nsock);
+      waitpid(-1,NULL,WNOHANG);
+    } else {
+      dup2(nsock,0);
+      dup2(nsock,1);
+      close(nsock);
+      execvp( cmd, args );
+      return 3;
+    }
+  }
+
+  return 0;
+}