PROC_FDWALK(3PROC) Process Control Library Functions PROC_FDWALK(3PROC)

proc_fdwalkwalk the open file descriptors for a process

Process Control Library (libproc, -lproc)
#include <libproc.h>

proc_fdwalk(pid_t pid, proc_fdwalk_f *func, void *arg);

The () function walks all file descriptors currently open in the process with ID pid and calls the callback function func once for each file descriptor with the user-specified arg. The definition of proc_fdwalk_f is available in libproc(3LIB).

func will be called once for each file descriptor and will have its first argument filled in with the contents of the corresponding /proc file for the file descriptor.

The return value of the caller's func function determines whether or not iteration will continue. If func returns a non-zero value, then iteration will terminate and that return value will be returned to the caller. To distinguish between system errors and caller errors, it is recommended that the function only return positive integers in the event of an error.

Upon successful completion, the proc_fdwalk() function returns . Otherwise, is returned and is updated to reflect the error that occurred.

In addition to the errors listed below, the proc_fdwalk() function may fail for the same reasons as the opendir(3C), readdir(3C), and malloc(3C) functions.

malloc(3C), opendir(3C), readdir(3C), libproc(3LIB), proc(5)

January 6, 2020 OmniOS