minix/lib/libsys/taskcall.c

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/* _taskcall() is the same as _syscall() except it returns negative error
* codes directly and not in errno. This is a better interface for PM and
* VFS.
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*/
#include <lib.h>
#include <minix/syslib.h>
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int _taskcall(who, syscallnr, msgptr)
endpoint_t who;
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int syscallnr;
register message *msgptr;
{
int status;
msgptr->m_type = syscallnr;
status = _sendrec(who, msgptr);
if (status != 0) return(status);
return(msgptr->m_type);
}