+++ /dev/null
-// $Id: vdu.c 2260 2006-01-22 11:56:28Z ensc $ --*- c -*--
-
-// Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
-//
-// 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; version 2 of the License.
-//
-// 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.
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "util.h"
-#include <lib/vserver.h>
-#include <lib/fmt.h>
-
-#include <stdlib.h>
-#include <getopt.h>
-#include <stdint.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <fcntl.h>
-
-#define ENSC_WRAPPERS_PREFIX "vdu: "
-#define ENSC_WRAPPERS_VSERVER 1
-#define ENSC_WRAPPERS_UNISTD 1
-#define ENSC_WRAPPERS_DIRENT 1
-#define ENSC_WRAPPERS_FCNTL 1
-#define ENSC_WRAPPERS_STAT 1
-#include <wrappers.h>
-
-#define CMD_HELP 0x1000
-#define CMD_VERSION 0x1001
-#define CMD_XID 0x2000
-#define CMD_SPACE 0x2001
-#define CMD_INODES 0x2002
-#define CMD_SCRIPT 0x2003
-#define CMD_BLOCKSIZE 0x2005
-
-int wrapper_exit_code = 1;
-
-struct option const
-CMDLINE_OPTIONS[] = {
- { "help", no_argument, 0, CMD_HELP },
- { "version", no_argument, 0, CMD_VERSION },
- { "xid", required_argument, 0, CMD_XID },
- { "space", no_argument, 0, CMD_SPACE },
- { "inodes", no_argument, 0, CMD_INODES },
- { "script", no_argument, 0, CMD_SCRIPT },
- { "blocksize", required_argument, 0, CMD_BLOCKSIZE },
- {0,0,0,0}
-};
-
-struct Arguments {
- xid_t xid;
- bool space;
- bool inodes;
- bool script;
- unsigned long blocksize;
-};
-
-struct Result {
- uint_least64_t blocks;
- uint_least64_t inodes;
-};
-
-struct TraversalParams {
- struct Arguments const * const args;
- struct Result * const result;
-};
-
-static void
-showHelp(int fd, char const *cmd, int res)
-{
- WRITE_MSG(fd, "Usage:\n ");
- WRITE_STR(fd, cmd);
- WRITE_MSG(fd,
- " --xid <xid> (--space|--inodes) [--blocksize <blocksize>] [--script] <directory>*\n"
- "\n"
- "Please report bugs to " PACKAGE_BUGREPORT "\n");
-
- exit(res);
-}
-
-static void
-showVersion()
-{
- WRITE_MSG(1,
- "vdu " VERSION " -- calculates the size of a directory\n"
- "This program is part of " PACKAGE_STRING "\n\n"
- "Copyright (C) 2006 Enrico Scholz\n"
- VERSION_COPYRIGHT_DISCLAIMER);
- exit(0);
-}
-
-/* basic hash table implementation for inode tracking */
-#define HASH_SIZE 103
-typedef struct hash_entry {
- struct hash_entry *next;
- ino_t inode;
-} hash_entry;
-
-typedef struct hash_table {
- hash_entry *entries[HASH_SIZE];
-} hash_table;
-
-static hash_table ht;
-
-static void
-hash_init(void)
-{
- memset(&ht, 0, sizeof(hash_table));
-}
-
-static void
-hash_free(void)
-{
- int i;
- hash_entry *e, *p;
- for (i = 0; i < HASH_SIZE; i++) {
- for (e = ht.entries[i], p = NULL; e; e = e->next) {
- free(p);
- p = e;
- }
- free(p);
- }
-}
-
-static int
-hash_insert(ino_t inode)
-{
- hash_entry *e, *p;
- unsigned int hashval = inode % HASH_SIZE;
-
- /* no one else here */
- if (ht.entries[hashval] == NULL) {
- ht.entries[hashval] = malloc(sizeof(hash_entry));
- ht.entries[hashval]->next = NULL;
- ht.entries[hashval]->inode = inode;
- return 0;
- }
-
- for (e = ht.entries[hashval], p = NULL; e; e = e->next) {
- /* already in the hash table */
- if (e->inode == inode)
- return -1;
- else if (e->inode > inode) {
- /* we're first */
- if (p == NULL) {
- ht.entries[hashval] = malloc(sizeof(hash_entry));
- ht.entries[hashval]->next = e;
- ht.entries[hashval]->inode = inode;
- }
- /* we're in the middle */
- else {
- p->next = malloc(sizeof(hash_entry));
- p->next->next = e;
- p->next->inode = inode;
- }
- return 0;
- }
- p = e;
- }
- /* we're last */
- p->next = malloc(sizeof(hash_entry));
- p->next->next = NULL;
- p->next->inode = inode;
-
- return 0;
-}
-
-static void
-visitDirEntry(char const *name, dev_t const dir_dev,
- struct TraversalParams *params);
-
-static void
-visitDir(char const *name, struct stat const *expected_stat, struct TraversalParams *params)
-{
- int fd = Eopen(".", O_RDONLY|O_DIRECTORY, 0);
- DIR * dir;
-
- EsafeChdir(name, expected_stat);
-
- dir = Eopendir(".");
-
- for (;;) {
- struct dirent *ent = Ereaddir(dir);
- if (ent==0) break;
-
- if (isDotfile(ent->d_name)) continue;
- visitDirEntry(ent->d_name, expected_stat->st_dev, params);
- }
-
- Eclosedir(dir);
-
- Efchdir(fd);
- Eclose(fd);
-}
-
-static void
-visitDirEntry(char const *name, dev_t const dir_dev,
- struct TraversalParams *params)
-{
- struct stat st;
- xid_t xid;
-
- ElstatD(name, &st);
-
- xid = vc_getfilecontext(name);
- if (xid == params->args->xid &&
- (st.st_nlink == 1 || hash_insert(st.st_ino) != -1)) {
- params->result->blocks += st.st_blocks;
- params->result->inodes += 1;
- }
-
- if (S_ISDIR(st.st_mode) && dir_dev == st.st_dev)
- visitDir(name, &st, params);
-}
-
-static void
-visitDirStart(char const *name, struct TraversalParams *params)
-{
- struct stat st;
- int fd = Eopen(".", O_RDONLY|O_DIRECTORY, 0);
-
- Estat(name, &st);
- Echdir(name);
-
- visitDirEntry(".", st.st_dev, params);
-
- Efchdir(fd);
- Eclose(fd);
-}
-
-int main(int argc, char *argv[])
-{
- struct Arguments args = {
- .xid = VC_NOCTX,
- .space = false,
- .inodes = false,
- .script = false,
- .blocksize = 1024,
- };
-
- while (1) {
- int c = getopt_long(argc, argv, "+", CMDLINE_OPTIONS, 0);
- if (c==-1) break;
-
- switch (c) {
- case CMD_HELP : showHelp(1, argv[0], 0);
- case CMD_VERSION : showVersion();
- case CMD_XID : args.xid = Evc_xidopt2xid(optarg,true); break;
- case CMD_SPACE : args.space = true; break;
- case CMD_INODES : args.inodes = true; break;
- case CMD_SCRIPT : args.script = true; break;
- case CMD_BLOCKSIZE:
- if (!isNumberUnsigned(optarg, &args.blocksize, false)) {
- WRITE_MSG(2, "Invalid block size argument: '");
- WRITE_STR(2, optarg);
- WRITE_MSG(2, "'; try '--help' for more information\n");
- return EXIT_FAILURE;
- }
- break;
- default :
- WRITE_MSG(2, "Try '");
- WRITE_STR(2, argv[0]);
- WRITE_MSG(2, " --help' for more information.\n");
- return 255;
- break;
- }
- }
-
- if (args.xid==VC_NOCTX)
- WRITE_MSG(2, "No xid specified; try '--help' for more information\n");
- else if (!args.space && !args.inodes)
- WRITE_MSG(2, "Must specify --space or --inodes; try '--help' for more information\n");
- else if (optind==argc)
- WRITE_MSG(2, "No directory specified; try '--help' for more information\n");
- else {
- int i;
- size_t len;
- struct Result result;
- struct TraversalParams params = {
- .args = &args,
- .result = &result
- };
-
- for (i = optind; i < argc; i++) {
- uint_least64_t size;
- char buf[sizeof(size)*3 + 3];
- char const * delim = "";
-
- result.blocks = 0;
- result.inodes = 0;
-
- hash_init();
- visitDirStart(argv[i], ¶ms);
- hash_free();
-
- if (!args.script) {
- WRITE_STR(1, argv[i]);
- WRITE_MSG(1, " ");
- }
-
- if (args.space) {
- len = utilvserver_fmt_uint64(buf, result.blocks*512 / args.blocksize);
- if (*delim) WRITE_STR(1, delim);
- Vwrite(1, buf, len);
- delim = " ";
- }
- if (args.inodes) {
- len = utilvserver_fmt_uint64(buf, result.inodes);
- if (*delim) WRITE_STR(1, delim);
- Vwrite(1, buf, len);
- delim = " ";
- }
- WRITE_MSG(1, "\n");
- }
- return EXIT_SUCCESS;
- }
-
- return EXIT_FAILURE;
-}
git://git.onelab.eu / util-vserver.git / blobdiff