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/* Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
cp.c -- a demo program that works similar to the standard dd utility. */
#include "busy.h"
errno_t cp_cmd(busy_ctx_t *ctx) {
reiser4_object_t *src_obj, *dst_obj;
FILE *src_file, *dst_file;
int64_t rbytes, wbytes;
uint64_t count;
errno_t res;
char *buf;
if (ctx->in.path[0] == 0 || ctx->out.path[0] == 0) {
aal_error("NULL path is given.");
return -EINVAL;
}
/* Open source file. */
if (ctx->in.fs) {
if (!(src_obj = reiser4_semantic_open(ctx->in.fs->tree,
ctx->in.path, NULL, 1)))
{
aal_error("Can't open file %s.", ctx->in.path);
return -EIO;
}
src_file = NULL;
} else {
if (!(src_file = fopen(ctx->in.path, "r"))) {
aal_error("Can't open file %s.", ctx->in.path);
return -EIO;
}
src_obj = NULL;
}
/* Open destination file. */
if (ctx->out.fs) {
if (!(dst_obj = reiser4_semantic_try_open(ctx->out.fs->tree,
ctx->out.path,
NULL, 1)))
{
char *name = ctx->out.path;
reiser4_object_t *parent;
parent = busy_misc_open_parent(ctx->out.fs->tree, &name);
if (!parent || parent == INVAL_PTR)
goto error_src_close;
dst_obj = reiser4_reg_create(parent, name);
if (!dst_obj) {
aal_error("Failed to create file %s.",
ctx->out.path);
goto error_src_close;
}
}
dst_file = NULL;
} else {
if (!(dst_file = fopen(ctx->out.path, "w+"))) {
aal_error("Can't open file %s.", ctx->out.path);
goto error_src_close;
}
dst_obj = NULL;
}
if (src_obj && reiser4_psobj(src_obj)->p.id.group != REG_OBJECT) {
aal_error("File %s is not a regular file.", ctx->in.path);
goto error_dst_close;
}
if (dst_obj && reiser4_psobj(dst_obj)->p.id.group != REG_OBJECT) {
aal_error("File %s is not a regular file.", ctx->out.path);
goto error_dst_close;
}
if (src_file) {
struct stat st;
if (fstat(fileno(src_file), &st)) {
aal_error("Can't stat the file %s.", ctx->in.path);
goto error_dst_close;
}
if (!S_ISREG(st.st_mode)) {
aal_error("File %s is not a regular file.",
ctx->in.path);
goto error_dst_close;
}
}
if (dst_file) {
struct stat st;
if (fstat(fileno(dst_file), &st)) {
aal_error("Can't stat the file %s.", ctx->out.path);
goto error_dst_close;
}
if (!S_ISREG(st.st_mode)) {
aal_error("File %s is directory.", ctx->out.path);
goto error_dst_close;
}
}
/* Seek the source file. */
if (ctx->in.offset) {
res = src_obj ?
reiser4_object_seek(src_obj, ctx->in.offset):
fseek(src_file, ctx->in.offset, SEEK_SET);
if (res) {
aal_error("Can't seek to %lld bytes in file %s.",
ctx->in.offset, ctx->in.path);
goto error_dst_close;
}
}
/* Seek the destination file. */
if (ctx->out.offset) {
res = dst_obj ?
reiser4_object_seek(dst_obj, ctx->out.offset):
fseek(dst_file, ctx->out.offset, SEEK_SET);
if (res) {
aal_error("Can't seek to %lld bytes in file %s.",
ctx->out.offset, ctx->out.path);
goto error_dst_close;
}
}
/* Alloc the data buffer. */
if (!(buf = aal_malloc(ctx->blksize))) {
aal_error("Can't allocate %d bytes for the buffer.",
ctx->blksize);
goto error_dst_close;
}
/* Do copying. */
for (count = ctx->count; count > 0; count--) {
/* Read. */
rbytes = src_obj ?
reiser4_object_read(src_obj, buf, ctx->blksize) :
(int64_t)fread(buf, 1, ctx->blksize, src_file);
if (rbytes < 0) {
aal_error("Read of %llu-th by %u bytes failed.",
ctx->count - count, ctx->blksize);
goto error_free_buf;
}
if (rbytes == 0)
break;
/* Write. */
wbytes = dst_obj ?
reiser4_object_write(dst_obj, buf, rbytes):
(int64_t)fwrite(buf, 1, rbytes, dst_file);
if (wbytes < rbytes) {
aal_error("Write of the %u byte block #%llu failed.",
ctx->blksize, ctx->count - count);
goto error_free_buf;
}
}
aal_free(buf);
if (dst_obj)
reiser4_object_close(dst_obj);
if (dst_file)
fclose(dst_file);
if (src_obj)
reiser4_object_close(src_obj);
if (src_file)
fclose(src_file);
return 0;
error_free_buf:
aal_free(buf);
error_dst_close:
if (dst_obj)
reiser4_object_close(dst_obj);
if (dst_file)
fclose(dst_file);
error_src_close:
if (src_obj)
reiser4_object_close(src_obj);
if (src_file)
fclose(src_file);
return -EIO;
}
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