b=21581 too long file / path names for old tar

[fs/lustre-release.git] / libsysio / src / readlink.c

diff --git a/libsysio/src/readlink.c b/libsysio/src/readlink.c
index 7053c62..c8e7436 100644 (file)
--- a/libsysio/src/readlink.c
+++ b/libsysio/src/readlink.c
@@ -45,13 +45,18 @@
 #include <errno.h>
 #include <assert.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <sys/queue.h>
 
 #include "sysio.h"
 #include "inode.h"
 #include "sysio-symbols.h"
 
+#ifdef HAVE_POSIX_1003_READLINK
+ssize_t
+#else
 int
+#endif
 SYSIO_INTERFACE_NAME(readlink)(const char *path, char *buf, size_t bufsiz)
 {
        struct intent intent;
@@ -66,14 +71,15 @@ SYSIO_INTERFACE_NAME(readlink)(const char *path, char *buf, size_t bufsiz)
        if (err)
                goto out;
        ino = pno->p_base->pb_ino;
-       err = (*ino->i_ops.inop_readlink)(pno, buf, bufsiz);
-       if (err)
+       if (!S_ISLNK(ino->i_stbuf.st_mode)) {
+               err = -EINVAL;
                goto error;
-
+       }
+       err = (*ino->i_ops.inop_readlink)(pno, buf, bufsiz);
 error:
        P_RELE(pno);
 out:
-       SYSIO_INTERFACE_RETURN(err, err >= 0 ? 0 : err);
+       SYSIO_INTERFACE_RETURN(err < 0 ? -1 : err, err >= 0 ? 0 : err);
 }
 
 #ifdef REDSTORM