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#include <stdlib.h>
#include <string.h>
#include "procfs.h"
struct dircat_node
{
struct node **dirs;
};
static error_t
dircat_get_contents (void *hook, void **contents, size_t *contents_len)
{
struct dircat_node *dcn = hook;
int i, sz, pos;
error_t err;
pos = 0;
*contents = malloc (sz = 512);
for (i=0; dcn->dirs[i]; i++)
{
void *subcon;
size_t sublen;
err = procfs_get_contents (dcn->dirs[i], &subcon, &sublen);
if (err)
{
free (*contents);
*contents = NULL;
return err;
}
while (pos + sublen > sz)
*contents = realloc (*contents, sz *= 2);
memcpy (*contents + pos, subcon, sublen);
pos += sublen;
}
*contents_len = pos;
return 0;
}
static error_t
dircat_lookup (void *hook, const char *name, struct node **np)
{
struct dircat_node *dcn = hook;
error_t err;
int i;
err = ENOENT;
for (i=0; err && dcn->dirs[i]; i++)
err = procfs_lookup (dcn->dirs[i], name, np);
return err;
}
static void
dircat_release_dirs (struct node **dirs)
{
int i;
for (i=0; dirs[i]; i++)
netfs_nrele (dirs[i]);
}
static void
dircat_cleanup (void *hook)
{
struct dircat_node *dcn = hook;
dircat_release_dirs (dcn->dirs);
free (dcn);
}
struct node *
dircat_make_node (struct node **dirs)
{
static struct procfs_node_ops ops = {
.get_contents = dircat_get_contents,
.cleanup_contents = procfs_cleanup_contents_with_free,
.lookup = dircat_lookup,
.cleanup = dircat_cleanup,
/* necessary so that it propagates to proclist */
.enable_refresh_hack_and_break_readdir = 1,
};
struct dircat_node *dcn;
dcn = malloc (sizeof *dcn);
if (! dcn)
{
dircat_release_dirs (dirs);
return NULL;
}
dcn->dirs = dirs;
return procfs_make_node (&ops, dcn);
}
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