util.c revision b044c2e02af46c54206f0f6e29896ab32681a7db
13839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 23839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * util.c --- utilities for the debugfs program 33839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * 43839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * Copyright (C) 1993, 1994 Theodore Ts'o. This file may be 53839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * redistributed under the terms of the GNU Public License. 63839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * 73839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 83839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 93839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <stdio.h> 103839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <unistd.h> 113839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <stdlib.h> 123839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <ctype.h> 133839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <string.h> 141e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o#include <time.h> 152c4a540636142a936889bbe4b85a2b9c56bfa458Theodore Ts'o#include <signal.h> 163839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 173839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include "debugfs.h" 183839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 193839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oFILE *open_pager(void) 203839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 213839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o FILE *outfile; 22b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o const char *pager = getenv("PAGER"); 233839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 242c4a540636142a936889bbe4b85a2b9c56bfa458Theodore Ts'o signal(SIGPIPE, SIG_IGN); 253839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!pager) 26c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o pager = "more"; 27c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o 28c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o outfile = popen(pager, "w"); 29c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o if (!outfile) 303839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o outfile = stdout; 31c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o 323839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return (outfile); 333839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 343839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 353839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ovoid close_pager(FILE *stream) 363839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 373839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (stream && stream != stdout) fclose(stream); 383839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 393839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 403839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 413839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine is used whenever a command needs to turn a string into 423839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * an inode. 433839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 44b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'oext2_ino_t string_to_inode(char *str) 453839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 46b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o ext2_ino_t ino; 47b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o int len = strlen(str); 48b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o char *end; 49b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o int retval; 503839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 513839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o /* 523839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * If the string is of the form <ino>, then treat it as an 533839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * inode number. 543839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 553839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) { 569131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o ino = strtoul(str+1, &end, 0); 579131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o if (*end=='>') 589131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o return ino; 593839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 603839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 611e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o retval = ext2fs_namei(current_fs, root, cwd, str, &ino); 623839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (retval) { 633839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(str, retval, ""); 643839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 653839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 663839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return ino; 673839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 683839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 693839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 703839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if the filesystem is not open, and prints an 713839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 723839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 733839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_open(char *name) 743839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 751e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!current_fs) { 763839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, "Filesystem not open"); 773839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 783839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 793839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 803839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 813839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 823839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 833839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if a filesystem is open, and prints an 843839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 853839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 863839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_not_open(char *name) 873839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 881e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (current_fs) { 893839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, 903839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o "Filesystem %s is still open. Close it first.\n", 911e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o current_fs->device_name); 923839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 933839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 943839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 953839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 963839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 971e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 981e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This routine returns 1 if a filesystem is not opened read/write, 991e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * and prints an error message to that effect. 1001e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1011e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'oint check_fs_read_write(char *name) 1021e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1031e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!(current_fs->flags & EXT2_FLAG_RW)) { 1041e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o com_err(name, 0, "Filesystem opened read/only"); 1051e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 1; 1061e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1071e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 0; 1081e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1091e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1101e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 111d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * This routine returns 1 if a filesystem is doesn't have its inode 112d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * and block bitmaps loaded, and prints an error message to that 113d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * effect. 114d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o */ 115d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'oint check_fs_bitmaps(char *name) 116d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o{ 117d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o if (!current_fs->block_map || !current_fs->inode_map) { 118d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o com_err(name, 0, "Filesystem bitmaps not loaded"); 119d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 1; 120d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o } 121d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 0; 122d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o} 123d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o 124d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o/* 1251e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This function takes a __u32 time value and converts it to a string, 1261e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * using ctime 1271e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'ochar *time_to_string(__u32 cl) 1291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o time_t t = (time_t) cl; 1311e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1321e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return ctime(&t); 1331e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1341e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1351e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1361e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1371e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 138