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[PXEXT] Change the PXE return code for EWOULDBLOCK

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.)
tags/v0.9.4
H. Peter Anvin hace 16 años
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commit
61ee294875
Se han modificado 1 ficheros con 2 adiciones y 2 borrados
  1. 2
    2
      src/include/errno.h

+ 2
- 2
src/include/errno.h Ver fichero

@@ -448,8 +448,8 @@ extern char missing_errfile_declaration[] __attribute__ (( deprecated ));
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 /** Text file busy */
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 #define ETXTBSY			( ERRFILE | PXENV_STATUS_FAILURE | 0x4d000000 )
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-/** Operation would block */
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-#define EWOULDBLOCK		( ERRFILE | PXENV_STATUS_FAILURE | 0x4e000000 )
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+/** Operation would block (different from EAGAIN!) */
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+#define EWOULDBLOCK		( ERRFILE | PXENV_STATUS_TFTP_OPEN | 0x4e000000 )
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 /** Improper link */
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 #define EXDEV			( ERRFILE | PXENV_STATUS_FAILURE | 0x4f000000 )

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