libc-bottom-half/sources/getcwd.c

   1 #include <unistd.h>
   2 #include <errno.h>
   3 #include <string.h>
   4
   5 // For threads this needs to synchronize with chdir
   6 #ifdef _REENTRANT
   7 #error "getcwd doesn't yet support multiple threads"
   8 #endif
   9
  10 char *__wasilibc_cwd = "/";
  11
  12 char *getcwd(char *buf, size_t size)
  13 {
  14     if (!buf) {
  15         buf = strdup(__wasilibc_cwd);
  16         if (!buf) {
  17             errno = ENOMEM;
  18             return NULL;
  19         }
  20     } else {
  21         size_t len = strlen(__wasilibc_cwd);
  22         if (size < len + 1) {
  23             errno = ERANGE;
  24             return NULL;
  25         }
  26         strcpy(buf, __wasilibc_cwd);
  27     }
  28     return buf;
  29 }
  30