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author | Brad Bishop <bradleyb@us.ibm.com> | 2014-06-30 22:10:16 -0500 |
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committer | Patrick Williams <iawillia@us.ibm.com> | 2014-07-02 22:49:29 -0500 |
commit | bf4630076762d9c20c16c80c1c791f352b046dd1 (patch) | |
tree | efc67bad010a28fd1abf5aeeefda2a969514fd97 /fpart/src/cmd_trunc.c | |
download | ffs-bf4630076762d9c20c16c80c1c791f352b046dd1.tar.gz ffs-bf4630076762d9c20c16c80c1c791f352b046dd1.zip |
Port FFS tools over from Building Block repository.
Diffstat (limited to 'fpart/src/cmd_trunc.c')
-rw-r--r-- | fpart/src/cmd_trunc.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/fpart/src/cmd_trunc.c b/fpart/src/cmd_trunc.c new file mode 100644 index 0000000..b946bdc --- /dev/null +++ b/fpart/src/cmd_trunc.c @@ -0,0 +1,134 @@ +/* + * Copyright (c) International Business Machines Corp., 2012 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * File: trunc.c + * Author: Shaun Wetzstein <shaun@us.ibm.com> + * Descr: --trunc implementation + * Date: 01/30/2013 + */ + +#include <sys/types.h> +#include <sys/stat.h> + +#include <fcntl.h> +#include <string.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdio.h> +#include <stdbool.h> +#include <unistd.h> +#include <getopt.h> +#include <errno.h> +#include <ctype.h> +#include <regex.h> + +#include <clib/assert.h> +#include <clib/list.h> +#include <clib/list_iter.h> +#include <clib/misc.h> +#include <clib/min.h> +#include <clib/err.h> +#include <clib/raii.h> + +#include "main.h" + +int command_trunc(args_t * args) +{ + assert(args != NULL); + + char name[strlen(args->name) + 2]; + strcpy(name, args->name); + if (strrchr(name, '$') == NULL) + strcat(name, "$"); + + off_t __poffset; + ffs_t * __ffs; + + char full_name[page_size]; + regex_t rx; + + /* ========================= */ + + int trunc_entry(ffs_entry_t * entry) + { + if (__ffs_entry_name(__ffs, entry, full_name, + sizeof full_name) < 0) + return -1; + + if (regexec(&rx, full_name, 0, NULL, 0) == REG_NOMATCH) + return 0; + + if (entry->flags & FFS_FLAGS_PROTECTED && + args->force != f_FORCE) { + printf("%llx: %s: protected, skipping truncate\n", + __poffset, full_name); + return 0; + } + + size_t size = entry->size * __ffs->hdr->block_size; + if (args->size != NULL) + if (parse_size(args->size, &size) < 0) + return -1; + + if (__ffs_entry_truncate(__ffs, full_name, size) < 0) + return -1; + + if (args->verbose == f_VERBOSE) + printf("%llx: %s: truncate size '%x'\n", __poffset, + full_name, size); + + return 0; + } + + int trunc(args_t * args, off_t poffset) + { + __poffset = poffset; + + const char * target = args->target; + int debug = args->debug; + + RAII(FILE*, file, fopen_generic(target, "r+", debug), fclose); + if (file == NULL) + return -1; + RAII(ffs_t*, ffs, __ffs_fopen(file, poffset), __ffs_fclose); + if (ffs == NULL) + return -1; + + __ffs = ffs; + + int rc = __ffs_iterate_entries(ffs, trunc_entry); + if (rc == 1) + return -1; + + return rc; + } + + /* ========================= */ + + if (regcomp(&rx, name, REG_ICASE | REG_NOSUB) != 0) { + ERRNO(errno); + return -1; + } + + int rc = command(args, trunc); + + regfree(&rx); + + return rc; +} |