Added postfork

postfork.cpp

@@ -0,0 +1,68 @@
+/** \file postfork.cpp
+
+	Functions that we may safely call after fork().
+*/
+
+#include "postfork.h"
+
+/**
+   This function should be called by both the parent process and the
+   child right after fork() has been called. If job control is
+   enabled, the child is put in the jobs group, and if the child is
+   also in the foreground, it is also given control of the
+   terminal. When called in the parent process, this function may
+   fail, since the child might have already finished and called
+   exit. The parent process may safely ignore the exit status of this
+   call.
+
+   Returns 0 on sucess, -1 on failiure. 
+*/
+int set_child_group( job_t *j, process_t *p, int print_errors )
+{
+	int res = 0;
+	
+	if( job_get_flag( j, JOB_CONTROL ) )
+	{
+		if (!j->pgid)
+		{
+			j->pgid = p->pid;
+		}
+		
+		if( setpgid (p->pid, j->pgid) )
+		{
+			if( getpgid( p->pid) != j->pgid && print_errors )
+			{
+				debug( 1, 
+				       _( L"Could not send process %d, '%ls' in job %d, '%ls' from group %d to group %d" ),
+				       p->pid,
+				       p->argv0(),
+				       j->job_id,
+				       j->command_cstr(),
+				       getpgid( p->pid),
+				       j->pgid );
+
+				wperror( L"setpgid" );
+				res = -1;
+			}
+		}
+	}
+	else
+	{
+		j->pgid = getpid();
+	}
+
+	if( job_get_flag( j, JOB_TERMINAL ) && job_get_flag( j, JOB_FOREGROUND ) )
+	{
+		if( tcsetpgrp (0, j->pgid) && print_errors )
+		{
+			debug( 1, _( L"Could not send job %d ('%ls') to foreground" ), 
+				   j->job_id, 
+				   j->command_cstr() );
+			wperror( L"tcsetpgrp" );
+			res = -1;
+		}
+	}
+
+	return res;
+}
+