/* * tune2fs.c - Change the file system parameters on * an unmounted second extended file system * * Copyright (C) 1992, 1993, 1994 Remy Card * Laboratoire MASI, Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * This file can be redistributed under the terms of the GNU General * Public License */ /* * History: * 93/06/01 - Creation * 93/10/31 - Added the -c option to change the maximal mount counts * 93/12/14 - Added -l flag to list contents of superblock * M.J.E. Mol (marcel@duteca.et.tudelft.nl) * F.W. ten Wolde (franky@duteca.et.tudelft.nl) * 93/12/29 - Added the -e option to change errors behavior * 94/02/27 - Ported to use the ext2fs library * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de) */ #include #include #ifdef HAVE_GETOPT_H #include #endif #include #include #include #include #include #include #include #include #include "ext2fs/ext2fs.h" #include "et/com_err.h" #include "e2p/e2p.h" #include "../version.h" const char * program_name = "tune2fs"; char * device_name = NULL; int c_flag = 0; int e_flag = 0; int g_flag = 0; int i_flag = 0; int l_flag = 0; int m_flag = 0; int r_flag = 0; int u_flag = 0; int max_mount_count; unsigned long interval; unsigned long reserved_ratio = 0; unsigned long reserved_blocks = 0; unsigned short errors; unsigned long resgid = 0; unsigned long resuid = 0; static volatile void usage (void) { fprintf (stderr, "Usage: %s [-c max-mounts-count] [-e errors-behavior] " "[-g group]\n" "\t[-i interval[d|m|w]] [-l] [-m reserved-blocks-percent]\n" "\t[-r reserved-blocks-count] [-u user] device\n", program_name); exit (1); } void main (int argc, char ** argv) { char c; char * tmp; errcode_t retval; ext2_filsys fs; struct group * gr; struct passwd * pw; fprintf (stderr, "tune2fs %s, %s for EXT2 FS %s, %s\n", E2FSPROGS_VERSION, E2FSPROGS_DATE, EXT2FS_VERSION, EXT2FS_DATE); if (argc && *argv) program_name = *argv; initialize_ext2_error_table(); while ((c = getopt (argc, argv, "c:e:g:i:lm:r:u:")) != EOF) switch (c) { case 'c': max_mount_count = strtoul (optarg, &tmp, 0); if (*tmp || max_mount_count > 16000) { com_err (program_name, 0, "bad mounts count - %s", optarg); usage (); } c_flag = 1; break; case 'e': if (strcmp (optarg, "continue") == 0) errors = EXT2_ERRORS_CONTINUE; else if (strcmp (optarg, "remount-ro") == 0) errors = EXT2_ERRORS_RO; else if (strcmp (optarg, "panic") == 0) errors = EXT2_ERRORS_PANIC; else { com_err (program_name, 0, "bad error behavior - %s", optarg); usage (); } e_flag = 1; break; case 'g': resgid = strtoul (optarg, &tmp, 0); if (*tmp) { gr = getgrnam (optarg); if (gr == NULL) tmp = optarg; else { resgid = gr->gr_gid; *tmp =0; } } if (*tmp) { com_err (program_name, 0, "bad gid/group name - %s", optarg); usage (); } g_flag = 1; break; case 'i': interval = strtoul (optarg, &tmp, 0); switch (*tmp) { case '\0': case 'd': case 'D': /* days */ interval *= 86400; if (*tmp != '\0') tmp++; break; case 'm': case 'M': /* months! */ interval *= 86400 * 30; tmp++; break; case 'w': case 'W': /* weeks */ interval *= 86400 * 7; tmp++; break; } if (*tmp || interval > (365 * 86400)) { com_err (program_name, 0, "bad interval - %s", optarg); usage (); } i_flag = 1; break; case 'l': l_flag = 1; break; case 'm': reserved_ratio = strtoul (optarg, &tmp, 0); if (*tmp || reserved_ratio > 50) { com_err (program_name, 0, "bad reserved block ratio - %s", optarg); usage (); } m_flag = 1; break; case 'r': reserved_blocks = strtoul (optarg, &tmp, 0); if (*tmp) { com_err (program_name, 0, "bad reserved blocks count - %s", optarg); usage (); } r_flag = 1; break; case 'u': resuid = strtoul (optarg, &tmp, 0); if (*tmp) { pw = getpwnam (optarg); if (pw == NULL) tmp = optarg; else { resuid = pw->pw_uid; *tmp = 0; } } if (*tmp) { com_err (program_name, 0, "bad uid/user name - %s", optarg); usage (); } u_flag = 1; break; default: usage (); } if (optind < argc - 1 || optind == argc) usage (); if (!c_flag && !e_flag && !g_flag && !i_flag && !l_flag && !m_flag && !r_flag && !u_flag) usage (); device_name = argv[optind]; retval = ext2fs_open (device_name, (c_flag || e_flag || g_flag || i_flag || m_flag || r_flag || u_flag) ? EXT2_FLAG_RW : 0, 0, 0, unix_io_manager, &fs); if (retval) { com_err (program_name, retval, "while trying to open %s", device_name); printf("Couldn't find valid filesystem superblock.\n"); exit(1); } if (c_flag) { fs->super->s_max_mnt_count = max_mount_count; ext2fs_mark_super_dirty(fs); printf ("Setting maximal mount count to %d\n", max_mount_count); } if (e_flag) { fs->super->s_errors = errors; ext2fs_mark_super_dirty(fs); printf ("Setting error behavior to %d\n", errors); } if (g_flag) #ifdef EXT2_DEF_RESGID { fs->super->s_def_resgid = resgid; ext2fs_mark_super_dirty(fs); printf ("Setting reserved blocks gid to %lu\n", resgid); } #else com_err (program_name, 0, "The -g option is not supported by this version -- " "Recompile with a newer kernel"); #endif if (i_flag) { fs->super->s_checkinterval = interval; ext2fs_mark_super_dirty(fs); printf ("Setting interval between check %lu seconds\n", interval); } if (m_flag) { fs->super->s_r_blocks_count = (fs->super->s_blocks_count / 100) * reserved_ratio; ext2fs_mark_super_dirty(fs); printf ("Setting reserved blocks percentage to %lu (%lu blocks)\n", reserved_ratio, fs->super->s_r_blocks_count); } if (r_flag) { if (reserved_blocks >= fs->super->s_blocks_count) { com_err (program_name, 0, "reserved blocks count is too big (%ul)", reserved_blocks); exit (1); } fs->super->s_r_blocks_count = reserved_blocks; ext2fs_mark_super_dirty(fs); printf ("Setting reserved blocks count to %lu\n", reserved_blocks); } if (u_flag) #ifdef EXT2_DEF_RESUID { fs->super->s_def_resuid = resuid; ext2fs_mark_super_dirty(fs); printf ("Setting reserved blocks uid to %lu\n", resuid); } #else com_err (program_name, 0, "The -u option is not supported by this version -- " "Recompile with a newer kernel"); #endif if (l_flag) list_super (fs->super); ext2fs_close (fs); exit (0); }