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[PXEXT] Change the PXE return code for EWOULDBLOCK

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Change the PXE return code for EWOULDBLOCK from PXENV_STATUS_FAILURE
to PXENV_STATUS_TFTP_OPEN.  This code is only used by the FILE_READ
PXEXT call, and is necessary to distinguish "error" from "no data" in
that call.

(The only other nonblocking call is UDP_READ, where the caller doesn't
care about the distinction, however, gPXE doesn't use EWOULDBLOCK
internally to represent this condition in that code.)
This commit is contained in:
H. Peter Anvin 2008-03-26 15:12:19 -07:00
parent d62e89d776
commit 61ee294875
1 changed files with 2 additions and 2 deletions
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4
src/include/errno.h
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@ -448,8 +448,8 @@ extern char missing_errfile_declaration[] __attribute__ (( deprecated ));
/** Text file busy */
#define ETXTBSY ( ERRFILE | PXENV_STATUS_FAILURE | 0x4d000000 )
/** Operation would block */
#define EWOULDBLOCK ( ERRFILE | PXENV_STATUS_FAILURE | 0x4e000000 )
/** Operation would block (different from EAGAIN!) */
#define EWOULDBLOCK ( ERRFILE | PXENV_STATUS_TFTP_OPEN | 0x4e000000 )
/** Improper link */
#define EXDEV ( ERRFILE | PXENV_STATUS_FAILURE | 0x4f000000 )