Courseadmin

debugger/interface.c

@@ -9,10 +9,10 @@
 #include <string.h>
 #define BUFFSIZE 8192
 #define MaxPipeName 100
-#define logdir "/home/ruttan/classes/capstone/debugger/"
-#define numDbgArgs 5
+#define logdir "/var/www/html/Web/debugger"#define numDbgArgs 5
 #define ArgSize 30
-
+#define prompt ">>>"
+//#define prompt "(gdb)"
 pid_t child_pid;
 char buf[BUFFSIZE],work_file[MaxPipeName];
 FILE * fdtoFILE;
@@ -29,7 +29,7 @@ void catch_sigint(int sig_num)
     /* re-set the signal handler again to catch_int, for next time */
     signal(SIGINT, catch_sigint);
     kill(child_pid,1); 
-    fprintf(fdtoFILE,"got a sigint signal\n");
+    fprintf(fdtoFILE,"Interface:got a sigint signal\n");
     fflush(fdtoFILE);
     sleep(1);
     exit(1);
@@ -80,11 +80,17 @@ pid_t launch_debugger(char * argv[],int pipefd[2]){
 }
 
 void make_args(char * id,char * argv[]){
-  argv[0]="/usr/bin/python3";
+
+  //pthon flags
+  argv[0]="/usr/bin/python";
   argv[1]="-i";
-  argv[2]="-m";
-  argv[3]=work_file;
-  argv[4]=0;  
+  argv[2]=0; //"-m";
+  argv[3]=0; //work_file;argv[4]=0; 
+  /*
+  //gdb flags
+  argv[0]="/usr/bin/gdb";
+  argv[1]=0;  
+  */
 }
 
 int main (int argc, char ** argv) {
@@ -105,6 +111,7 @@ int main (int argc, char ** argv) {
       perror("usage: debugger idcode");
       exit(1);
     }
+
     //create input pipe from webserver
     sprintf(fromServer,"%s%s%s",logdir,"OUT",argv[1]);
     unlink(fromServer);
@@ -137,18 +144,27 @@ int main (int argc, char ** argv) {
 
     int i;
     char c;
+    int sid;
+    sid=setsid();
+    if (sid < 0){
+      fprintf(fdtoFILE,"failed to change sid\n");
+      fflush(fdtoFILE);
+    }
       make_args(argv[1],nargv);
       child_pid=launch_debugger(nargv,pipefd);
+      fprintf(fdtoFILE,"session id=%d\n",sid);
+      fflush(fdtoFILE);
       fprintf(fdtoFILE,"child_pid=%d\n",child_pid);
       fflush(fdtoFILE);
        setpgid(0, 0);
+
       fprintf(fdtoFILE,"---starting---\n");
       fflush(fdtoFILE);
 
 
       while(1){
         line[0]=0;
-        while (!strstr(line,">>>") && !strstr(line,"...")){
+        while (!strstr(line,prompt) && !strstr(line,"...")){
           if ((n=read(pipefd[0],line,BUFFSIZE))){
             if (!n) {
               fprintf(fdtoFILE,"pipe fd[0] closed");
@@ -159,7 +175,7 @@ int main (int argc, char ** argv) {
             line[n]=0;
 	    //if n=BUFFSIZE...
            }       
-          fprintf(fdtoFILE,"p-%s",line);
+          fprintf(fdtoFILE,";  p->%s",line);
           fflush(fdtoFILE);
           if (write(fdtoWeb,line,n) != n) {
              perror("fdtoWeb write error");

debugger/interface.c.BACKUP.772.c

@@ -0,0 +1,228 @@
+#include <stdio.h>
+#include <sys/stat.h>  /* for mkfifo */
+#include <sys/types.h>  /* for open */
+#include <sys/stat.h>  /* for open */
+#include <fcntl.h>    /* for open */
+#include <unistd.h>   /* for write */
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#define BUFFSIZE 8192
+#define MaxPipeName 100
+<<<<<<< HEAD
+#define logdir "/var/www/html/Web/debugger/"
+=======
+#define logdir "log/"
+>>>>>>> master
+#define numDbgArgs 5
+#define ArgSize 30
+#define prompt ">>>"
+//#define prompt "(gdb)"
+pid_t child_pid;
+char buf[BUFFSIZE],work_file[MaxPipeName];
+FILE * fdtoFILE;
+
+void catch_sigpipe(int sig_num)
+{
+    /* re-set the signal handler again to catch_int, for next time */
+    signal(SIGPIPE, catch_sigpipe);
+    fprintf(fdtoFILE,"got a signal\n");
+    fflush(fdtoFILE);
+}
+void catch_sigint(int sig_num)
+{
+    /* re-set the signal handler again to catch_int, for next time */
+    signal(SIGINT, catch_sigint);
+    kill(child_pid,1); 
+    fprintf(fdtoFILE,"Interface:got a sigint signal\n");
+    fflush(fdtoFILE);
+    sleep(1);
+    exit(1);
+}
+
+pid_t launch_debugger(char * argv[],int pipefd[2]){
+  int stdio[3];
+  pid_t child_pid;
+  int pipefd0[2],pipefd1[2];
+  pipe(pipefd0);
+  if(pipe(pipefd0) == -1) {
+        perror("Pipe 0 creation failed");
+        exit(1);
+    }
+  pipe(pipefd1);
+  if(pipe(pipefd1) == -1) {
+        perror("Pipe 1 creation failed");
+        exit(1);
+  }
+  //create function to setup pipes fork and exec
+  pipefd[0]=pipefd0[0];
+  pipefd[1]=pipefd1[1];
+  stdio[0]=dup(STDIN_FILENO);   
+  stdio[1]=dup(STDOUT_FILENO);
+  stdio[2]=dup(STDERR_FILENO);
+  dup2(pipefd1[0],STDIN_FILENO);    
+  dup2(pipefd0[1],STDOUT_FILENO);    
+  dup2(pipefd0[1],STDERR_FILENO);
+  switch (child_pid=fork()){
+  case -1:
+     perror("Could not fork debugger");
+     exit(1);
+     break;
+  case 0:
+    if (execvp(argv[0],argv)==-1){
+      perror("exec failed");
+      exit(1);
+    }
+  default:
+    //after fork in parent.
+    dup2(stdio[0],STDIN_FILENO);    
+    dup2(stdio[1],STDOUT_FILENO);    
+    dup2(stdio[2],STDERR_FILENO);
+    close(pipefd1[0]);
+    close(pipefd0[1]);
+  }
+  return(child_pid);   
+}
+
+void make_args(char * id,char * argv[]){
+
+  //pthon flags
+  argv[0]="/usr/bin/python";
+  argv[1]="-i";
+  argv[2]=0; //"-m";
+  argv[3]=0; //work_file;argv[4]=0; 
+  /*
+  //gdb flags
+  argv[0]="/usr/bin/gdb";
+  argv[1]=0;  
+  */
+}
+
+int main (int argc, char ** argv) {
+  int n;
+  char * nargv[numDbgArgs];
+  int fdtoWeb,fdfrmWeb,fdtoDbg,fdfrmDgb,pipefd[2];
+  char line[BUFFSIZE],toServer[MaxPipeName],fromServer[MaxPipeName];
+    sprintf(buf,"%s%s%s",logdir,"LOG",argv[1]);
+    unlink(buf);
+    fdtoFILE=fopen(buf,"w");
+    fprintf(fdtoFILE,"testing file output\n");
+    sprintf(work_file,"%s%s%s",logdir,"FILE",argv[1]);
+    unlink(work_file);
+
+    signal(SIGPIPE, catch_sigpipe);
+    signal(SIGINT, catch_sigint);
+    if ((argc < 2 )|| (argc >=3)){
+      perror("usage: debugger idcode");
+      exit(1);
+    }
+
+    //create input pipe from webserver
+    sprintf(fromServer,"%s%s%s",logdir,"OUT",argv[1]);
+    unlink(fromServer);
+
+    if (-1 == mkfifo(fromServer,S_IRWXU)) {
+       perror("Error, could not make fifo\n");
+    }
+
+    //create output pipe to webserver
+    sprintf(toServer,"%s%s%s",logdir,"IN",argv[1]);
+    unlink(toServer);
+
+    if (-1 == mkfifo(toServer,S_IRWXU)) {
+        perror("Error, could not make fifo\n");
+    }
+    if ((fdfrmWeb = open(fromServer,O_RDONLY)) == -1) {
+      perror("cannot open fifo from server");
+      exit(1);
+    }
+    if ((fdtoWeb = open(toServer,O_WRONLY)) == -1) {
+      perror("cannot open fifo to server");
+      exit(1);
+    }
+    //create pipes to debugger
+
+    if(pipe(pipefd) == -1) { //perhaps pipe(pipefd,O_NONBLOCK)
+        perror("Pipe 1 creation failed");
+        exit(1);
+    }
+
+    int i;
+    char c;
+    int sid;
+    sid=setsid();
+    if (sid < 0){
+      fprintf(fdtoFILE,"failed to change sid\n");
+      fflush(fdtoFILE);
+    }
+      make_args(argv[1],nargv);
+      child_pid=launch_debugger(nargv,pipefd);
+      fprintf(fdtoFILE,"session id=%d\n",sid);
+      fflush(fdtoFILE);
+      fprintf(fdtoFILE,"child_pid=%d\n",child_pid);
+      fflush(fdtoFILE);
+
+      fprintf(fdtoFILE,"---starting---\n");
+      fflush(fdtoFILE);
+
+
+      while(1){
+        line[0]=0;
+        while (!strstr(line,prompt) && !strstr(line,"...")){
+          if ((n=read(pipefd[0],line,BUFFSIZE))){
+            if (!n) {
+              fprintf(fdtoFILE,"pipe fd[0] closed");
+              fflush(fdtoFILE);
+              exit(1);
+	    }
+            //line[n++]='@'; 
+            line[n]=0;
+	    //if n=BUFFSIZE...
+           }       
+          fprintf(fdtoFILE,";  p->%s",line);
+          fflush(fdtoFILE);
+          if (write(fdtoWeb,line,n) != n) {
+             perror("fdtoWeb write error");
+            fprintf(fdtoFILE,"fdtoWeb write error\n");
+            fflush(fdtoFILE);
+
+	  }         
+
+        }
+
+         if ((n=read(fdfrmWeb,line,BUFFSIZE))){
+            line[n]=0;
+            fprintf(fdtoFILE,"%d-%s%s",n,"w-",line);
+	    fflush(fdtoFILE);
+             if (write(pipefd[1],line,n) != n) {
+             perror("pipefd[1] write error");
+	     }        
+
+	 }
+         else{
+           printf("empty read\n");
+	   close(fdtoWeb);
+           close(fdfrmWeb);
+           n=0;
+           if ((fdfrmWeb = open(fromServer,O_RDONLY)) == -1) {
+              perror("cannot open fifo from server");
+              exit(1);
+           }
+
+           if ((fdtoWeb = open(toServer,O_WRONLY)) == -1) {
+             perror("cannot open fifo to server");
+             exit(1);
+	   }
+           line[0]='\n';
+           if (write(pipefd[1],line,1) != 1) {
+             perror("pipefd[1] write error");
+	   }        
+
+	 }
+
+      }
+
+    exit(0);
+}
+
+