util.c revision d61f6176024865007d5a0da49c61c21e9d498007
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> 153839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 163839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include "debugfs.h" 173839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 183839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oFILE *open_pager(void) 193839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 203839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o FILE *outfile; 213839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char *pager = getenv("PAGER"); 223839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 233839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!pager) 243839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o outfile = stdout; 253839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o else { 263839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o outfile = popen(pager, "w"); 273839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!outfile) outfile = stdout; 283839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 293839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return (outfile); 303839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 313839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 323839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ovoid close_pager(FILE *stream) 333839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 343839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (stream && stream != stdout) fclose(stream); 353839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 363839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 373839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 383839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine is used whenever a command needs to turn a string into 393839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * an inode. 403839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 413839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oino_t string_to_inode(char *str) 423839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 433839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o ino_t ino; 443839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o int len = strlen(str); 453839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o int i; 463839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o int retval; 473839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 483839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o /* 493839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * If the string is of the form <ino>, then treat it as an 503839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * inode number. 513839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 523839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) { 533839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o for (i = 1; i < len-1; i++) 543839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!isdigit(str[i])) 553839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o break; 563839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (i == len-1) 573839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return(atoi(str+1)); 583839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 593839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 601e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o retval = ext2fs_namei(current_fs, root, cwd, str, &ino); 613839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (retval) { 623839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(str, retval, ""); 633839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 643839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 653839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return ino; 663839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 673839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 683839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 693839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if the filesystem is not open, and prints an 703839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 713839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 723839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_open(char *name) 733839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 741e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!current_fs) { 753839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, "Filesystem not open"); 763839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 773839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 783839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 793839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 803839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 813839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 823839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if a filesystem is open, and prints an 833839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 843839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 853839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_not_open(char *name) 863839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 871e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (current_fs) { 883839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, 893839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o "Filesystem %s is still open. Close it first.\n", 901e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o current_fs->device_name); 913839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 923839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 933839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 943839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 953839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 961e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 971e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This routine returns 1 if a filesystem is not opened read/write, 981e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * and prints an error message to that effect. 991e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1001e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'oint check_fs_read_write(char *name) 1011e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1021e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!(current_fs->flags & EXT2_FLAG_RW)) { 1031e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o com_err(name, 0, "Filesystem opened read/only"); 1041e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 1; 1051e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1061e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 0; 1071e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1081e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1091e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 110d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * This routine returns 1 if a filesystem is doesn't have its inode 111d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * and block bitmaps loaded, and prints an error message to that 112d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * effect. 113d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o */ 114d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'oint check_fs_bitmaps(char *name) 115d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o{ 116d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o if (!current_fs->block_map || !current_fs->inode_map) { 117d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o com_err(name, 0, "Filesystem bitmaps not loaded"); 118d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 1; 119d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o } 120d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 0; 121d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o} 122d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o 123d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o/* 1241e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This function takes a __u32 time value and converts it to a string, 1251e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * using ctime 1261e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1271e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'ochar *time_to_string(__u32 cl) 1281e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1291e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o time_t t = (time_t) cl; 1301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1311e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return ctime(&t); 1321e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1331e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1341e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1351e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1361e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 137