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|man pages section 3: Extended Library Functions, Volume 1 Oracle Solaris 11.1 Information Library|
- walk through links in a devlink snapshot
cc [ flag... ] file... -ldevinfo [ library... ] #include <libdevinfo.h> int di_devlink_walk(di_devlink_handle_t hdl, const char *re, const char *mpath, uint_t flags, void *arg, int (*devlink_callback)(di_devlink_t devlink, void *arg));
A handle to a snapshot of devlinks in “/dev”.
An extended regular expression as specified in regex(5) describing the paths of devlinks to visit. A null value matches all devlinks. The expression should not involve the “/dev” prefix. For example, the “^dsk/” will invoke devlink_callback() for all “/dev/dsk/” links.
A path to a minor node below “/devices” for which “/dev” links are to be looked up. A null value selects all devlinks. This path should not have a “/devices” prefix.
Specify the type of devlinks to be selected. If DI_PRIMARY_LINK is used, only primary links (for instance, links which point only to “/devices” entries) are selected. If DI_SECONDARY_LINK is specified, only secondary links (for instance, devlinks which point to other devlinks) are selected. If neither flag is specified, all devlinks are selected.
A pointer to caller private data.
The devlink being visited.
The di_devlink_walk() function visits every link in the snapshot that meets the criteria specified by the caller. For each such devlink, the caller-supplied function devlink_callback() is invoked. The return value of devlink_callback() determines subsequent walk behavior.
Upon success, the di_devlink_walk() function returns 0. Otherwise, -1 is returned and errno is set to indicate the error.
The devlink_callback() function can return the following values:
Terminate the walk immediately.
The devlink_callback() function will fail if:
One or more arguments is invalid.
Insufficient memory is available.
See attributes(5) for descriptions of the following attributes: