Shell Scripting

My own shell-wannabe

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Join Date: Aug 2008

Posts: 13

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mashimaro

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Newbie Poster

My own shell-wannabe

Nov 8th, 2008

Hey, I wanted to write a script that would act as a shell, meaning: would display prompt, read from keyboard and run system commands. My guess would be to use fork() and exec() and strtok(), so I wrote this:

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#all includes <bla.h>
 
main(int argc, char *argv){
int proces;
char *line;
char *cmd;
int my_exec;
pid_t pid;
 
while(1){
printf("serwerX:1% ");
gets(line);
cmd=strtok(line," ");
pid=fork();
if(pid==0){
   my_exec=execl(cmd);
   if(my_exec==-1){
      printf("error");
      }
   exit(0);
}
else{
   sleep(1);
   printf("serwerX:2% ");
   exit(0);
   }
}
}
#all includes <bla.h>

main(int argc, char *argv){
int proces;
char *line;
char *cmd;
int my_exec;
pid_t pid;

while(1){
printf("serwerX:1% ");
gets(line);
cmd=strtok(line," ");
pid=fork();
if(pid==0){
   my_exec=execl(cmd);
   if(my_exec==-1){
      printf("error");
      }
   exit(0);
}
else{
   sleep(1);
   printf("serwerX:2% ");
   exit(0);
   }
}
}