Copyright (c) 2008 Peter Wemm
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$FreeBSD$

.Dd May 27, 2015 .Dt KINFO_GETFILE 3 .Os .Sh NAME .Nm kinfo_getfile .Nd function for getting per-process file descriptor information .Sh LIBRARY .Lb libutil .Sh SYNOPSIS n sys/types.h n sys/user.h n libutil.h .Ft struct kinfo_file * .Fn kinfo_getfile "pid_t pid" "int *cntp" .Sh DESCRIPTION This function is used for obtaining the file descriptor information of a particular process.

p The .Ar pid field contains the process identifier. This should be the a process that you have privilege to access. The .Ar cntp field allows the caller to know how many records are returned.

p This function is a wrapper around .Xr sysctl 3 with the .Dv KERN_PROC_FILEDESC mib. While the kernel returns a packed structure, this function expands the data into a fixed record format. .Sh RETURN VALUES On success the .Fn kinfo_getfile function returns a pointer to an array of .Vt struct kinfo_file structures as defined by n sys/user.h . The array was obtained by an internal call to .Xr malloc 3 and must be freed by the caller with a call to .Xr free 3 . On failure the .Fn kinfo_getfile function returns .Dv NULL . .Sh SEE ALSO .Xr free 3 , .Xr kinfo_getvmmap 3 , .Xr malloc 3 , .Xr sysctl 3