reshaped

[planetlab-umts-tools.git] / frontend / umts.c

diff --git a/frontend/umts.c b/frontend/umts.c
new file mode 100644 (file)
index 0000000..f6c4d87
--- /dev/null
+++ b/frontend/umts.c
@@ -0,0 +1,135 @@
+#define _XOPEN_SOURCE
+#define _XOPEN_SOURCE_EXTENDED
+#define _SVID_SOURCE
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/select.h>
+#include <sys/resource.h>
+#include <sys/mount.h>
+#include <sys/vfs.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sched.h>
+#include <stdarg.h>
+#include <dirent.h>
+
+#include <sys/file.h>
+#include <errno.h>
+
+
+#include "umts.h"
+
+//#define DEBUG
+
+int vfd0, vfd1;
+//char *inf,*outf;
+int i = 0;
+//int c=0;
+
+#define BUFSIZE 2048
+
+char lineread[BUFSIZE];
+char command[BUFSIZE];
+
+char * lock_file="/var/run/umts_lock";
+
+int ret;
+
+char * vsys_in="/vsys/umts_backend.in";
+char * vsys_out="/vsys/umts_backend.out";
+
+fd_set set;
+char lineread[BUFSIZE];
+
+int main(int argc, char **argv, char **envp){
+   
+    if (argc < 2) {
+       printf("Usage: umts <cmd> [ argument ]\n");
+       exit(1);
+    } else {
+
+
+       strcpy(command, argv[1]);
+    
+       if (argc > 2){
+               strcat(command, " ");
+               strcat(command, argv[2]);
+       }
+
+       strcat(command, "\n");
+
+       int lock_fd=open(lock_file,O_WRONLY|O_CREAT);
+
+       if (lock_fd==-1){
+               printf("Error in creating lock file %s. Are you root of the slice?\n", lock_file);
+               exit(1);
+       }
+
+
+       if (flock(lock_fd, LOCK_EX |  LOCK_NB)){
+               if (errno == EWOULDBLOCK){
+                       printf("An operation is already being performed");
+                       close(lock_fd);
+                       exit(1);
+               } else if (errno == EBADF){
+                       printf("Error in lock file: 1\n");
+                       close(lock_fd);
+                       exit(1);
+               } else {
+                       printf("Error in lock file: 2\n");
+                       close(lock_fd);
+                       exit(1);
+               }
+       }
+
+       vfd0 = open(vsys_out, O_RDONLY | O_NONBLOCK);
+       #ifdef DEBUG
+       printf("Opened %s\n", vsys_out);
+       #endif
+ 
+       vfd1 = open(vsys_in, O_WRONLY);
+       #ifdef DEBUG
+       printf("Opened %s\n", vsys_in);
+       #endif
+
+
+       if (vfd0 == -1 || vfd1 == -1) {
+               printf("Error opening vsys umts entry.\n");
+               exit(1);
+       }
+
+       write(vfd1, command, strlen(command));  
+       
+       FD_ZERO(&set);
+
+       while(1){
+               FD_SET(vfd0, &set);
+               ret = select(vfd0+1, &set, NULL, NULL, NULL);
+               ret=read(vfd0,lineread,2048);
+               if (strstr(lineread,"EOF")) break;
+               //if (ret==0) break;
+               write(1,lineread,ret);
+               fflush(stdout);
+                FD_CLR(vfd0,&set);
+       };
+
+       close(vfd0);
+       close(vfd1);
+   
+       flock(lock_fd, LOCK_UN);
+       
+       close(lock_fd);
+
+   } 
+
+   return 0;
+}
+