diff options
Diffstat (limited to 'lib/libc/stdio/fpurge.c')
| -rw-r--r-- | lib/libc/stdio/fpurge.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/lib/libc/stdio/fpurge.c b/lib/libc/stdio/fpurge.c index 3bee5132aa57..7cf54ffb2e38 100644 --- a/lib/libc/stdio/fpurge.c +++ b/lib/libc/stdio/fpurge.c @@ -42,6 +42,10 @@ static char sccsid[] = "@(#)fpurge.c 8.1 (Berkeley) 6/4/93"; #include <stdio.h> #include <stdlib.h> #include "local.h" +#ifdef _THREAD_SAFE +#include <pthread.h> +#include "pthread_private.h" +#endif /* * fpurge: like fflush, but without writing anything: leave the @@ -51,15 +55,23 @@ int fpurge(fp) register FILE *fp; { + int retval; +#ifdef _THREAD_SAFE + _thread_flockfile(fp,__FILE__,__LINE__); +#endif if (!fp->_flags) { errno = EBADF; - return(EOF); + retval = EOF; + } else { + if (HASUB(fp)) + FREEUB(fp); + fp->_p = fp->_bf._base; + fp->_r = 0; + fp->_w = fp->_flags & (__SLBF|__SNBF) ? 0 : fp->_bf._size; + retval = 0; } - - if (HASUB(fp)) - FREEUB(fp); - fp->_p = fp->_bf._base; - fp->_r = 0; - fp->_w = fp->_flags & (__SLBF|__SNBF) ? 0 : fp->_bf._size; - return (0); +#ifdef _THREAD_SAFE + _thread_funlockfile(fp); +#endif + return (retval); } |