Ok this shouldn't be too hard to do, heres the code i've written so far. I don't have a linux machine handy to check it. Can someone have a look thru it and say if theres any obvious mistakes i've made?

    
#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/types.h>

char *pwd(){
   size_t size = 100;
   while(1){
      char *pwdbuf = (char*) xmalloc(size);
      if(getcwd(pwdbuf,size) == pwdbuf)
          return pwdbuf;
      free(pwdbuf);
      if(errno != ERANGE)
         return 0;
      size *=2;
   }
}

int main(void){

   char *result; // *result[] maybe???


   result = pwd();
   printf("%s\n", result); // for loop in here perhaps???


   return EXIT_SUCCESS;

}    

Edited by - pdstatha on February 18, 2002 4:58:02 PM

I had to change it (not much) to get it to compile. After compiling correctly it worked though.

  #include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <errno.h>#include <sys/types.h>char *pwd(void) {  size_t size = 100;  while(1) {    char *pwdbuf = (char *) malloc(size);    if(getcwd(pwdbuf,size) == pwdbuf)       return pwdbuf;    free(pwdbuf);    if(errno != ERANGE) return 0;    size *= 2;  }}int main(void) {  char *result;  result = pwd();  printf("%s\n", result);  free(result);  return EXIT_SUCCESS;}  

Thanks m8 that was helpful, now for something which should be even easier, implementing cd. If you could do the same for the following I will be forever in your debt.

  #include <errno.h>#include <stdio.h>#include <unistd.h>#include <sys/types.h>#include <stdlib.h>//takes the directory as command line argmain(int argc, char **argv) {   if(argv[1] != ''\0'') {      if((errno = chdir(argv[1])) == ENOTDIR)         printf("Can''t change to %s\n", argv[1]);   }else       printf("Usage:%s dir_name\n", argv[0]);   return (0);}  

It works, but I changed it to be a little better. I made it ANSI-compliant, added a return error so that if your program was the actual "cd" then shell scripts could detect if an error occured, and some little stupid things that I just felt like.

        #include <errno.h>#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <unistd.h>int main(int argc, char **argv) {  if(argc > 1 && argv[1] != NULL) {    if((errno = chdir(argv[1])) == ENOTDIR) {      printf("Can't change to %s\n",argv[1]);      return -1;    }  } else printf("Usage: %s dir_name\n", argv[0]);  return 0;}  

Edit: Fixed extreme code mangling.


Edited by - Null and Void on February 18, 2002 6:16:32 PM