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erts: Only translate \r\n on character devices in fd ports #11531

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erts: Only translate \r\n on character devices in fd ports #11531

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6 changes: 5 additions & 1 deletion erts/emulator/sys/win32/sys.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2179,7 +2179,11 @@ fd_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts)
return ERL_DRV_ERROR_GENERAL;
}

dp->in.flags = DF_XLAT_CR;
/* If input is a terminal, we translate \r\n to \n */
if (GetFileType((HANDLE)opts->ifd) == FILE_TYPE_CHAR) {
dp->in.flags = DF_XLAT_CR;
}

if (is_std_error) {
dp->out.flags |= DF_DROP_IF_INVH; /* Just drop messages if stderror
is an invalid handle */
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