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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-15 21:04:01 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-15 21:04:01 +0000 |
commit | cb193710f4cd7d5cf6403d29e96fbecadeeed435 (patch) | |
tree | 07b4f8902241a04f903e59e162b3d3580ac24d95 /doc/posix1003.1/preface.texi | |
parent | Split ITRON Message Buffer Manager into multiple files. (diff) | |
download | rtems-cb193710f4cd7d5cf6403d29e96fbecadeeed435.tar.bz2 |
Added paragraph describing SUSP.
Diffstat (limited to '')
-rw-r--r-- | doc/posix1003.1/preface.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/posix1003.1/preface.texi b/doc/posix1003.1/preface.texi index f14a9b58a6..562c7e58d6 100644 --- a/doc/posix1003.1/preface.texi +++ b/doc/posix1003.1/preface.texi @@ -18,3 +18,12 @@ this document corresponds to a section in the 1003.1 standard and the implementation status of the items required by the standard are listed. +RTEMS supports a number of POSIX process, user, and group oriented +routines in what is referred to as a "SUSP" (Single-User, Single +Process) manner. RTEMS supports a single process, multithreaded +POSIX 1003.1b environment. In a pure world, there would be +no reason to even include routines like @code{getpid()} when there +can only be one process. But providing routines like @code{getpid()} +and making them work in a sensible fashion for an embedded environment +while not returning ENOSYS (for not implemented) makes it significantly +easier to port code from a UNIX environment without modifying it. |