c_cpp Solaris和Illumos libdevinfo用法示例

Posted 2021-05-14

#include <stdio.h>
#include <libdevinfo.h>
#define	DISK_DRIVER	"sd"	/* driver name */
// cc [ flag... ] file... -ldevinfo [ library... ]
// #include <libdevinfo.h>
//
void
prt_diskinfo(di_node_t node)
{
    int instance;
        char *phys_path;

    /*
     * If the device node exports no minor nodes,
     * there is no physical disk.
     */
     if (di_minor_next(node, DI_MINOR_NIL) == DI_MINOR_NIL) {
              return;
         }

         instance = di_instance(node);
         phys_path = di_devfs_path(node);
         printf("%s%d: %s\n", DISK_DRIVER, instance, phys_path);
         di_devfs_path_free(phys_path);
}

void
walk_disknodes(di_node_t node)
{
        node = di_drv_first_node(DISK_DRIVER, node);
        while (node != DI_NODE_NIL) {
             prt_diskinfo(node);
             node = di_drv_next_node(node);
        }
}

main()
{
    di_node_t root_node;
    if ((root_node = di_init("/", DINFOCPYALL)) == DI_NODE_NIL) {
        fprintf(stderr, "di_init() failed\n");
        exit(1);
    }
        walk_disknodes(root_node);
        di_fini(root_node);
}

#include <stdio.h>
#include <libdevinfo.h>
// cc [ flag... ] file... -ldevinfo [ library... ]
// #include <libdevinfo.h>
//
int 
prt_nodename(di_node_t node, void *arg)
{
     printf("%s\n", di_node_name(node));
     return (DI_WALK_CONTINUE);
}

main()
{
     di_node_t root_node;
     if((root_node = di_init("/", DINFOSUBTREE)) == DI_NODE_NIL) {
           fprintf(stderr, "di_init() failed\n");
           exit(1);
     }
     di_walk_node(root_node, DI_WALK_CLDFIRST, NULL, prt_nodename);
     di_fini(root_node);
}