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| .\" This file and its contents are supplied under the terms of the |
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| .\" Copyright 2015 Joyent, Inc. |
| .\" |
| .Dd May 11, 2016 |
| .Dt PFDINFO_ITER 3PROC |
| .Os |
| .Sh NAME |
| .Nm Pfdinfo_iter |
| .Nd iterate open files in a process |
| .Sh LIBRARY |
| .Lb libproc |
| .Sh SYNOPSIS |
| .In libproc.h |
| .Ft int |
| .Fo Pfdinfo_iter |
| .Fa "struct ps_prochandle *P" |
| .Fa "proc_fdinfo_f *func" |
| .Fa "void *data" |
| .Fc |
| .Sh DESCRIPTION |
| The |
| .Fn Pfdinfo_iter |
| function iterates over the open files in the process represented by |
| .Fa P . |
| .Pp |
| For each open file, the callback function |
| .Fa func |
| will be invoked and it will be passed the |
| .Fa data |
| argument as well as a pointer to a |
| .Sy prfdinfo_t |
| structure defined in |
| .Xr libproc 3LIB . |
| For the full signature of the |
| .Vt proc_fdinfo_f |
| see |
| .Xr libproc 3LIB . |
| .Pp |
| The return value of |
| .Fa func |
| controls whether or not iteration continues. |
| If |
| .Fa func |
| returns |
| .Sy 0 , |
| then iteration will continue. |
| However, if |
| .Fa func |
| instead returns a non-zero value, then iteration will halt and that |
| value will be used as the return value of the |
| .Fn Pfdinfo_iter |
| function. |
| Because the |
| .Fn Pfdinfo_iter |
| function returns |
| .Sy -1 |
| to an indicate its own errors, it is recommended that the callback |
| function does not return |
| .Sy -1 |
| to indicate an error so that the caller may distinguish between the |
| failure of the callback function and the failure of the |
| .Fn Pfdinfo_iter |
| function. |
| .Sh RETURN VALUES |
| Upon successful completion, the |
| .Fn Pfdinfo_iter |
| returns |
| .Sy 0 . |
| Otherwise, if there was an internal error then |
| .Sy -1 |
| is returned. |
| Otherwise, if the callback function |
| .Fa func |
| returns non-zero, then its return value will be returned instead. |
| .Sh INTERFACE STABILITY |
| .Sy Uncommitted |
| .Sh MT-LEVEL |
| See |
| .Sy LOCKING |
| in |
| .Xr libproc 3LIB . |
| .Sh SEE ALSO |
| .Xr libproc 3LIB |