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/* Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
ln.c -- a demo program that works similar to the standard ln utility. */
#include "busy.h"
errno_t ln_cmd(busy_ctx_t *ctx) {
reiser4_object_t *parent, *object;
reiser4_object_plug_t *plug;
entry_hint_t entry;
lookup_t res;
char *name;
aal_assert("vpf-1710", ctx != NULL);
if (!ctx->in.fs) {
aal_error("Fs is not openned. Wrong PAth is specified: %s.",
ctx->in.path);
return -EINVAL;
}
if (ctx->in.path[0] == 0) {
aal_error("NULL path is given.");
return -EINVAL;
}
if (ctx->out.path[0] == 0) {
aal_error("NULL link name is given.");
return -EINVAL;
}
if (!(object = reiser4_semantic_open(ctx->in.fs->tree,
ctx->in.path, NULL, 1)))
{
aal_error("Failed to open the file %s.", ctx->in.path);
return -EINVAL;
}
name = ctx->out.path;
parent = busy_misc_open_parent(ctx->in.fs->tree, &name);
if (!parent || parent == INVAL_PTR)
goto error_object_close;
/* Looking up for @entry in current directory */
plug = reiser4_psobj(parent);
if ((res = plugcall(plug, lookup, parent, name, &entry)) < 0)
goto error_close_parent;
if (res == PRESENT) {
aal_error("The file %s already exists.", ctx->out.path);
goto error_close_parent;
}
if (reiser4_object_entry_prep(ctx->in.fs->tree, parent,
&entry, name))
{
goto error_close_parent;
}
if (reiser4_object_link(parent, object, &entry)) {
aal_error("Failed to link object.");
goto error_close_parent;
}
reiser4_object_close(object);
reiser4_object_close(parent);
return 0;
error_close_parent:
reiser4_object_close(parent);
error_object_close:
reiser4_object_close(object);
return -EIO;
}
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