p4-14.c

UNIX程序设计教程

#include <unistd.h>
void * xmalloc(int);
char * getcwd_any()
{
    int size = 100;
    char *buffer = (char *)xmalloc(size);
    while(1){
       char *value = getcwd(buffer, size);
       if (value != 0)
          return buffer;
       size *= 2;
       free (buffer);
       buffer = (char *)xmalloc(size);
    }
}