diff options
Diffstat (limited to 'test/h5test.c')
| -rw-r--r-- | test/h5test.c | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/test/h5test.c b/test/h5test.c index 28513b9..255932a 100644 --- a/test/h5test.c +++ b/test/h5test.c @@ -12,7 +12,7 @@ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* - * Programmer: Robb Matzke <matzke@llnl.gov> + * Programmer: Robb Matzke * Thursday, November 19, 1998 * * Purpose: Provides support functions for most of the hdf5 tests cases. @@ -2243,3 +2243,61 @@ done: return ret_value; } /* end h5_duplicate_file_by_bytes() */ +/*------------------------------------------------------------------------- + * Function: h5_check_if_file_locking_enabled + * + * Purpose: Checks if file locking is enabled on this file system. + * + * Return: SUCCEED/FAIL + * are_enabled will be FALSE if file locking is disabled on + * the file system of if there were errors. + * + *------------------------------------------------------------------------- + */ +herr_t +h5_check_if_file_locking_enabled(hbool_t *are_enabled) +{ + const char *filename = "locking_test_file"; + mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; + int fd = -1; + + *are_enabled = TRUE; + + if((fd = HDcreat(filename, mode)) < 0) + goto error; + + /* Test HDflock() to see if it works */ + if(HDflock(fd, LOCK_EX | LOCK_NB) < 0) { + if(ENOSYS == errno) { + /* When errno is set to ENOSYS, the file system does not support + * locking, so ignore it. This is most frequently used on + * Lustre. If we also want to check for disabled NFS locks + * we'll need to check for ENOLCK, too. That isn't done by + * default here since that could also represent an actual + * error condition. + */ + errno = 0; + *are_enabled = FALSE; + } + else + goto error; + } + if(HDflock(fd, LOCK_UN) < 0) + goto error; + + if(HDclose(fd) < 0) + goto error; + if(HDremove(filename) < 0) + goto error; + + return SUCCEED; + +error: + *are_enabled = FALSE; + if (fd > -1) { + HDclose(fd); + HDremove(filename); + } + return FAIL; +} /* end h5_check_if_file_locking_enabled() */ + |