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Protect _IOC's 'len' and 'inout' parameters so that _IOC can be used in

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more flexible ways.
This commit is contained in:
David E. O'Brien 2008-08-28 18:29:59 +00:00
parent 0b25211b11
commit 7660701e51
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=182391
1 changed files with 2 additions and 2 deletions
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4
sys/sys/ioccom.h
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@ -50,8 +50,8 @@
#define IOC_INOUT (IOC_IN|IOC_OUT)
#define IOC_DIRMASK (IOC_VOID|IOC_OUT|IOC_IN)
#define _IOC(inout,group,num,len) \
((unsigned long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))
#define _IOC(inout,group,num,len) ((unsigned long) \
((inout) | (((len) & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))
#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
#define _IOWINT(g,n) _IOC(IOC_VOID, (g), (n), sizeof(int))
#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))