.TH "libnvmf_registry_attr_for_each" 9 "libnvmf_registry_attr_for_each" "October 2026" "libnvme API manual" LINUX
.SH NAME
libnvmf_registry_attr_for_each \- Iterate over attributes in a controller's registry entry
.SH SYNOPSIS
.B "int" libnvmf_registry_attr_for_each
.BI "(struct libnvme_global_ctx *ctx "  ","
.BI "const char *device "  ","
.BI "void (*callback)(const char *attr, const char *value, void *user_data) "  ","
.BI "void *user_data "  ");"
.SH ARGUMENTS
.IP "ctx" 12
libnvme global context; must not be NULL
.IP "device" 12
Kernel device name (e.g. "nvme3")
.IP "callback" 12
Callback invoked for each attribute
.IP "user_data" 12
User data passed to \fIcallback\fP
.SH "DESCRIPTION"
Opens the registry directory for \fIdevice\fP and invokes \fIcallback\fP for each
attribute file found.  Attribute files that disappear during iteration
(e.g. because the device is removed concurrently) are silently skipped.
.SH "RETURN"
0 on success, -ENOENT if the device directory does not exist at the
time of the initial open, negative errno otherwise.