util.c revision ec7fdb8f76ea88ba838690ae151735ae5ef800ba
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> 1688494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#ifdef HAVE_GETOPT_H 1788494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#include <getopt.h> 1888494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#else 1988494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'oextern int optind; 2088494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'oextern char *optarg; 2188494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#endif 2288494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#ifdef HAVE_OPTRESET 2388494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'oextern int optreset; /* defined by BSD, but not others */ 2488494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#endif 253839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 263839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include "debugfs.h" 273839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 2888494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o/* 2988494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * This function resets the libc getopt() function, which keeps 3088494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * internal state. Bad design! Stupid libc API designers! No 3188494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * biscuit! 3288494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * 3388494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * BSD-derived getopt() functions require that optind be reset to 1 in 3488494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * order to reset getopt() state. This used to be generally accepted 3588494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * way of resetting getopt(). However, glibc's getopt() 3688494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * has additional getopt() state beyond optind, and requires that 3788494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * optind be set zero to reset its state. So the unfortunate state of 3888494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * affairs is that BSD-derived versions of getopt() misbehave if 3988494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * optind is set to 0 in order to reset getopt(), and glibc's getopt() 4088494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * will core ump if optind is set 1 in order to reset getopt(). 4188494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * 4288494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * More modern versions of BSD require that optreset be set to 1 in 4388494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * order to reset getopt(). Sigh. Standards, anyone? 4488494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * 4588494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o * We hide the hair here. 4688494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o */ 4788494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'ovoid reset_getopt(void) 4888494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o{ 4988494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#ifdef __GLIBC__ 5088494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o optind = 0; 5188494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#else 5288494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o optind = 1; 5388494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#endif 5488494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#ifdef HAVE_OPTRESET 5588494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o optreset = 1; /* Makes BSD getopt happy */ 5688494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o#endif 57ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o} 58ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o 59ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'ostatic const char *pager_search_list[] = { "pager", "less", "more", 0 }; 60ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'ostatic const char *pager_dir_list[] = { "/usr/bin", "/bin", 0 }; 61ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o 62ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'ostatic const char *find_pager(char *buf) 63ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o{ 64ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o const char **i, **j; 65ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o 66ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o for (i = pager_search_list; *i; i++) { 67ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o for (j = pager_dir_list; *j; j++) { 68ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o sprintf(buf, "%s/%s", *j, *i); 69ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o if (access(buf, X_OK) == 0) 70ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o return(buf); 71ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o } 72ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o } 73ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o return 0; 74ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o} 7588494bb6d440f703db98b6cc4452f63d7aa392b9Theodore Ts'o 763839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oFILE *open_pager(void) 773839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 78ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o FILE *outfile = 0; 79b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o const char *pager = getenv("PAGER"); 80ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o char buf[80]; 813839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 822c4a540636142a936889bbe4b85a2b9c56bfa458Theodore Ts'o signal(SIGPIPE, SIG_IGN); 83df614db6ef79c767745b8154c26d69398b571605Theodore Ts'o if (pager) { 84df614db6ef79c767745b8154c26d69398b571605Theodore Ts'o if (strcmp(pager, "__none__") == 0) { 85df614db6ef79c767745b8154c26d69398b571605Theodore Ts'o return stdout; 86df614db6ef79c767745b8154c26d69398b571605Theodore Ts'o } 87df614db6ef79c767745b8154c26d69398b571605Theodore Ts'o } else 88ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o pager = find_pager(buf); 89ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o 90ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o if (pager) 91ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o outfile = popen(pager, "w"); 92c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o 93ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o if (!outfile) 94ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o outfile = stdout; 95c6bd0c97e4dc42511015b9a20b3e35dcdc8fd411Theodore Ts'o 96ec7fdb8f76ea88ba838690ae151735ae5ef800baTheodore Ts'o return (outfile); 973839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 983839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 993839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ovoid close_pager(FILE *stream) 1003839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 101571fc5a89c17985626df29823617b63094d10b31Theodore Ts'o if (stream && stream != stdout) pclose(stream); 1023839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 1033839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1043839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 1053839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine is used whenever a command needs to turn a string into 1063839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * an inode. 1073839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 108b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'oext2_ino_t string_to_inode(char *str) 1093839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 110b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o ext2_ino_t ino; 111b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o int len = strlen(str); 112b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o char *end; 113b044c2e02af46c54206f0f6e29896ab32681a7dbTheodore Ts'o int retval; 1143839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1153839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o /* 1163839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * If the string is of the form <ino>, then treat it as an 1173839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * inode number. 1183839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 1193839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) { 1209131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o ino = strtoul(str+1, &end, 0); 1219131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o if (*end=='>') 1229131a759318963d9c86a7de7138ac8cee9641f8cTheodore Ts'o return ino; 1233839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1243839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1251e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o retval = ext2fs_namei(current_fs, root, cwd, str, &ino); 1263839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (retval) { 1273839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(str, retval, ""); 1283839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 1293839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1303839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return ino; 1313839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 1323839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1333839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 1343839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if the filesystem is not open, and prints an 1353839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 1363839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 1373839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_open(char *name) 1383839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 1391e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!current_fs) { 1403839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, "Filesystem not open"); 1413839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 1423839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1433839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 1443839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 1453839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1463839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 1473839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * This routine returns 1 if a filesystem is open, and prints an 1483839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * error message to that effect. 1493839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 1503839e65723771b85975f4263102dd3ceec4523cTheodore Ts'oint check_fs_not_open(char *name) 1513839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 1521e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (current_fs) { 1533839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o com_err(name, 0, 1543839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o "Filesystem %s is still open. Close it first.\n", 1551e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o current_fs->device_name); 1563839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 1; 1573839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1583839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 1593839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 1603839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1611e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 1621e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This routine returns 1 if a filesystem is not opened read/write, 1631e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * and prints an error message to that effect. 1641e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1651e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'oint check_fs_read_write(char *name) 1661e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1671e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (!(current_fs->flags & EXT2_FLAG_RW)) { 1681e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o com_err(name, 0, "Filesystem opened read/only"); 1691e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 1; 1701e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o } 1711e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 0; 1721e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1731e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1741e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 175d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * This routine returns 1 if a filesystem is doesn't have its inode 176d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * and block bitmaps loaded, and prints an error message to that 177d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o * effect. 178d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o */ 179d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'oint check_fs_bitmaps(char *name) 180d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o{ 181d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o if (!current_fs->block_map || !current_fs->inode_map) { 182d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o com_err(name, 0, "Filesystem bitmaps not loaded"); 183d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 1; 184d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o } 185d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o return 0; 186d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o} 187d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o 188d61f6176024865007d5a0da49c61c21e9d498007Theodore Ts'o/* 1891e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * This function takes a __u32 time value and converts it to a string, 1901e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * using ctime 1911e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 1921e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'ochar *time_to_string(__u32 cl) 1931e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 1941e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o time_t t = (time_t) cl; 1951e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 1961e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return ctime(&t); 1971e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 1981e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 199e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o/* 200e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * This function will convert a string to an unsigned long, printing 201e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * an error message if it fails, and returning success or failure in err. 202e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o */ 203e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'ounsigned long parse_ulong(const char *str, const char *cmd, 204e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o const char *descr, int *err) 205e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 206e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o char *tmp; 207e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o unsigned long ret; 208e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 209e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o ret = strtoul(str, &tmp, 0); 210e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (*tmp == 0) { 211e5b3b27966ac71ca8b445a18a6ee1238684fb3f4Theodore Ts'o if (err) 212e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o *err = 0; 213e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return ret; 214e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 215e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o com_err(cmd, 0, "Bad %s - %s", descr, str); 216e5b3b27966ac71ca8b445a18a6ee1238684fb3f4Theodore Ts'o if (err) 217e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o *err = 1; 218e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o else 219e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o exit(1); 220e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 221e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 222e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 223e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o/* 224e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * This function will convert a string to a block number. It returns 225e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * 0 on success, 1 on failure. 226e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o */ 227e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint strtoblk(const char *cmd, const char *str, blk_t *ret) 228e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 229e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o blk_t blk; 230e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o int err; 231e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 232e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o blk = parse_ulong(str, cmd, "block number", &err); 233e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o *ret = blk; 234e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (err == 0 && blk == 0) { 235e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o com_err(cmd, 0, "Invalid block number 0"); 236e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o err = 1; 237e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 238e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return err; 239e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 240e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 241e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o/* 242e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * This is a common helper function used by the command processing 243e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * routines 244e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o */ 245e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint common_args_process(int argc, char *argv[], int min_argc, int max_argc, 246e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o const char *cmd, const char *usage, int flags) 247e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 248e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (argc < min_argc || argc > max_argc) { 249e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o com_err(argv[0], 0, "Usage: %s %s", cmd, usage); 250e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 251e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 252e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (flags & CHECK_FS_NOTOPEN) { 253e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (check_fs_not_open(argv[0])) 254e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 255e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } else { 256e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (check_fs_open(argv[0])) 257e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 258e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 259e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if ((flags & CHECK_FS_RW) && check_fs_read_write(argv[0])) 260e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 261e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if ((flags & CHECK_FS_BITMAPS) && check_fs_bitmaps(argv[0])) 262e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 263e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 264e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 2651e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 266e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o/* 267e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * This is a helper function used by do_stat, do_freei, do_seti, and 268e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * do_testi, etc. Basically, any command which takes a single 269e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * argument which is a file/inode number specifier. 270e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o */ 271e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint common_inode_args_process(int argc, char *argv[], 272e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o ext2_ino_t *inode, int flags) 273e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 274e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (common_args_process(argc, argv, 2, 2, argv[0], "<file>", flags)) 275e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 2761e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 277e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o *inode = string_to_inode(argv[1]); 278e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (!*inode) 279e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 280e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 281e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 282e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 283e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o/* 284e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o * This is a helper function used by do_freeb, do_setb, and do_testb 285e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o */ 286e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint common_block_args_process(int argc, char *argv[], 287e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o blk_t *block, int *count) 288e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 289e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o int err; 290e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 291e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (common_args_process(argc, argv, 2, 3, argv[0], 292e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o "<block> [count]", CHECK_FS_BITMAPS)) 293e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 294e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 295e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (strtoblk(argv[0], argv[1], block)) 296e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 297e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (argc > 2) { 298b38cd283637dafff6b39d4b76bf76fa2789eb21fTheodore Ts'o *count = parse_ulong(argv[2], argv[0], "count", &err); 299e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (err) 300e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 301e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 302e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 303e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 304e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 305e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint debugfs_read_inode(ext2_ino_t ino, struct ext2_inode * inode, 306e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o const char *cmd) 307e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 308e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o int retval; 309e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 310e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o retval = ext2fs_read_inode(current_fs, ino, inode); 311e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (retval) { 312e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o com_err(cmd, retval, "while reading inode %u", ino); 313e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 314e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 315e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 316e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 317e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 318e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'oint debugfs_write_inode(ext2_ino_t ino, struct ext2_inode * inode, 319e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o const char *cmd) 320e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o{ 321e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o int retval; 322e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o 323e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o retval = ext2fs_write_inode(current_fs, ino, inode); 324e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o if (retval) { 325e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o com_err(cmd, retval, "while writing inode %u", ino); 326e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 1; 327e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o } 328e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o return 0; 329e1018eeaa3285cd0ca26986d929194c1b577d211Theodore Ts'o} 3301e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 331