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/* Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
trunc.c -- a demo program that truncates the file to the given size. */
#include "busy.h"
errno_t trunc_cmd(busy_ctx_t *ctx) {
reiser4_object_t *object;
aal_assert("vpf-1712", 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 (!(object = reiser4_semantic_open(ctx->in.fs->tree,
ctx->in.path, NULL, 1)))
{
aal_error("Can't open file %s.", ctx->in.path);
return -EIO;
}
if (reiser4_psobj(object)->p.id.group != REG_OBJECT) {
aal_error("The object %s is not a regular file.",
ctx->in.path);
goto error_close_object;
}
/* Truncate the object. */
if (reiser4_object_truncate(object, ctx->count)) {
aal_error("Can't truncate object %s to %lld bytes.",
ctx->in.path, ctx->count);
goto error_close_object;
}
reiser4_object_close(object);
return 0;
error_close_object:
reiser4_object_close(object);
return -EIO;
}
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