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Diffstat (limited to 'manual/process.texi')
| -rw-r--r-- | manual/process.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/manual/process.texi b/manual/process.texi index 43230154f6..56edf2d24c 100644 --- a/manual/process.texi +++ b/manual/process.texi @@ -62,6 +62,10 @@ possible to create the shell process, and otherwise is the status of the shell process. @xref{Process Completion}, for details on how this status code can be interpreted. +If the @var{command} argument is a null pointer a non-zero return value +indicates that a command processor is available and this function can be +used at all. + This function is a cancelation point in multi-threaded programs. This is a problem if the thread allocates some resources (like memory, file descriptors, semaphores or whatever) at the time @code{system} is |