query the pathname prefix tree
#include <sys/prfx.h> int qnx_prefix_query( nid_t nid, char *path, char *buffer, int len );
The qnx_prefix_query() function returns the prefix tree below path on node nid, in buffer. The data in buffer is returned as a string and limited to len characters. If path is "" then the entire prefix string is returned in the form:
[prefix=string[:prefix=string] ... ]
where the square brackets aren't present, but indicate that the item enclosed is optional. The string is either an alias, such as /=//1/, or a resource manager mapping, such as /dev=8,a, where 8 is the process id, and a is the unit number.
If path isn't "", then a list of directories in the prefix tree immediately below the path is returned in the following form:
[dirname[\ndirname] ... ]
For example, where path = "/":
This function may set errno to any of the values listed for qnx_vc_attach().
|Signal handler||Yes, but modifies errno|
errno, qnx_prefix_attach(), qnx_prefix_detach(), qnx_vc_attach()