wut/libraries/wutdevoptab/devoptab_fsa_chdir.cpp

#include <cstdio>
#include "devoptab_fsa.h"

int
__wut_fsa_chdir(struct _reent *r,
                const char *path) {
   FSError status;
   __wut_fsa_device_t *deviceData;

   if (!path) {
      r->_errno = EINVAL;
      return -1;
   }

   char *fixedPath = __wut_fsa_fixpath(r, path);
   if (!fixedPath) {
      r->_errno = ENOMEM;
      return -1;
   }
   deviceData = (__wut_fsa_device_t *) r->deviceData;

   status = FSAChangeDir(deviceData->clientHandle, fixedPath);
   if (status < 0) {
      WUT_DEBUG_REPORT("FSAChangeDir(0x%08X, %s) failed: %s\n", deviceData->clientHandle, fixedPath, FSAGetStatusStr(status));
      free(fixedPath);
      r->_errno = __wut_fsa_translate_error(status);
      return -1;
   }

   // Remove trailing '/'
   if (fixedPath[0] != '\0') {
      if (fixedPath[strlen(fixedPath) - 1] == '/') {
         fixedPath[strlen(fixedPath) - 1] = 0;
      }
   }

   if (snprintf(deviceData->cwd, sizeof(deviceData->cwd), "%s", fixedPath) >= (int) sizeof(deviceData->cwd)) {
      WUT_DEBUG_REPORT("__wut_fsa_chdir: snprintf result was truncated\n");
   }

   free(fixedPath);

   return 0;
}