Reviewed by: julian and (hsu?)

Submitted by:	 John Birrel(L?)

changes for threadsafe operations

1 files changed, 27 insertions, 1 deletions

diff --git a/lib/libc/stdio/fseek.c b/lib/libc/stdio/fseek.c
index 9cb04ad..1e99de9 100644
--- a/lib/libc/stdio/fseek.c
+++ b/lib/libc/stdio/fseek.c
@@ -45,6 +45,10 @@ static char sccsid[] = "@(#)fseek.c	8.3 (Berkeley) 1/2/94";
 #include <stdlib.h>
 #include <errno.h>
 #include "local.h"
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+#endif
 
 #define	POS_ERR	(-(fpos_t)1)
 
@@ -68,6 +72,9 @@ fseek(fp, offset, whence)
 	if (!__sdidinit)
 		__sinit();
 
+#ifdef _THREAD_SAFE
+	_thread_flockfile(fp,__FILE__,__LINE__);
+#endif
 	/*
 	 * Have to be able to seek.
 	 */
@@ -92,8 +99,12 @@ fseek(fp, offset, whence)
 			curoff = fp->_offset;
 		else {
 			curoff = (*seekfn)(fp->_cookie, (fpos_t)0, SEEK_CUR);
-			if (curoff == -1L)
+			if (curoff == -1L) {
+#ifdef _THREAD_SAFE
+				_thread_funlockfile(fp);
+#endif
 				return (EOF);
+			}
 		}
 		if (fp->_flags & __SRD) {
 			curoff -= fp->_r;
@@ -115,6 +126,9 @@ fseek(fp, offset, whence)
 
 	default:
 		errno = EINVAL;
+#ifdef _THREAD_SAFE
+		_thread_funlockfile(fp);
+#endif
 		return (EOF);
 	}
 
@@ -198,6 +212,9 @@ fseek(fp, offset, whence)
 		if (HASUB(fp))
 			FREEUB(fp);
 		fp->_flags &= ~__SEOF;
+#ifdef _THREAD_SAFE
+		_thread_funlockfile(fp);
+#endif
 		return (0);
 	}
 
@@ -224,6 +241,9 @@ fseek(fp, offset, whence)
 		fp->_p += n;
 		fp->_r -= n;
 	}
+#ifdef _THREAD_SAFE
+	_thread_funlockfile(fp);
+#endif
 	return (0);
 
 	/*
@@ -233,6 +253,9 @@ fseek(fp, offset, whence)
 dumb:
 	if (__sflush(fp) ||
 	    (*seekfn)(fp->_cookie, (fpos_t)offset, whence) == POS_ERR) {
+#ifdef _THREAD_SAFE
+		_thread_funlockfile(fp);
+#endif
 		return (EOF);
 	}
 	/* success: clear EOF indicator and discard ungetc() data */
@@ -242,5 +265,8 @@ dumb:
 	fp->_r = 0;
 	/* fp->_w = 0; */	/* unnecessary (I think...) */
 	fp->_flags &= ~__SEOF;
+#ifdef _THREAD_SAFE
+	_thread_funlockfile(fp);
+#endif
 	return (0);
 }