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6 .TH DI_WALK_LINK 3DEVINFO "Mar 22, 2004"
8 di_walk_link \- traverse libdevinfo links
12 cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-ldevinfo\fR [ \fIlibrary\fR\&.\|.\|. ]
13 #include <libdevinfo.h>
15 \fBint\fR \fBdi_walk_link\fR(\fBdi_node_t\fR \fIroot\fR, \fBuint_t\fR \fIflag\fR, \fBuint_t\fR \fIendpoint\fR, \fBvoid *\fR\fIarg\fR,
16 \fBint (*\fR\fIlink_callback\fR)(di_link_t \fIlink\fR, void *\fIarg\fR));
26 The handle to the root node of the subtree to visit.
35 Specify 0. Reserved for future use.
44 Specify if the current node being visited should be the target or source of an
45 link, either \fBDI_LINK_TGT\fR or \fBDI_LINK_SRC\fR
54 A pointer to caller-specific data.
60 \fB\fIlink_callback\fR\fR
63 The caller-supplied callback function.
69 The \fBdi_walk_link()\fR function visits all nodes in the subtree rooted at
70 \fIroot\fR. For each node found, the caller-supplied function
71 \fIlink_callback\fR() is invoked for each link associated with that node where
72 that node is the specified \fIendpoint\fR of the link. The return value of
73 \fIlink_callback\fR() specifies subsequent walking behavior. See RETURN VALUES.
77 Upon successful completion, \fBdi_walk_link()\fR returns 0. Otherwise, -1 is
78 returned and \fBerrno\fR is set to indicate the error.
81 The callback function, \fIlink_callback\fR(), can return one of the following:
85 \fB\fBDI_WALK_CONTINUE\fR\fR
94 \fB\fBDI_WALK_TERMINATE\fR\fR
97 Terminate the walk immediately.
103 The \fBdi_walk_link()\fR function will fail if:
110 An argument is invalid.
116 See \fBattributes\fR(5) for descriptions of the following attributes:
124 ATTRIBUTE TYPE ATTRIBUTE VALUE
126 Interface Stability Evolving
134 \fBdi_init\fR(3DEVINFO), \fBlibdevinfo\fR(3LIB), \fBattributes\fR(5)