/* vi: set sw=4 ts=4: */ /* * Mini du implementation for busybox * * Copyright (C) 1999,2000,2001 by Lineo, inc. and John Beppu * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org> * Copyright (C) 2002 Edward Betts <edward@debian.org> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ /* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */ /* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */ /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) * * Mostly rewritten for SUSv3 compliance and to fix bugs/defects. * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options. * The -d option allows setting of max depth (similar to gnu --max-depth). * 2) Fixed incorrect size calculations for links and directories, especially * when errors occurred. Calculates sizes should now match gnu du output. * 3) Added error checking of output. * 4) Fixed busybox bug #1284 involving long overflow with human_readable. */ #include "busybox.h" #if ENABLE_FEATURE_HUMAN_READABLE # if ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K static unsigned long disp_hr = 1024; # else static unsigned long disp_hr = 512; # endif #elif ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K static unsigned disp_k = 1; #else static unsigned disp_k; /* bss inits to 0 */ #endif static int max_print_depth = INT_MAX; static nlink_t count_hardlinks = 1; static int status; static int print_files; static int slink_depth; static int du_depth; static int one_file_system; static dev_t dir_dev; static void print(long size, const char * const filename) { /* TODO - May not want to defer error checking here. */ #if ENABLE_FEATURE_HUMAN_READABLE printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr), filename); #else if (disp_k) { size++; size >>= 1; } printf("%ld\t%s\n", size, filename); #endif } /* tiny recursive du */ static long du(const char * const filename) { struct stat statbuf; long sum; if (lstat(filename, &statbuf) != 0) { bb_perror_msg("%s", filename); status = EXIT_FAILURE; return 0; } if (one_file_system) { if (du_depth == 0) { dir_dev = statbuf.st_dev; } else if (dir_dev != statbuf.st_dev) { return 0; } } sum = statbuf.st_blocks; if (S_ISLNK(statbuf.st_mode)) { if (slink_depth > du_depth) { /* -H or -L */ if (stat(filename, &statbuf) != 0) { bb_perror_msg("%s", filename); status = EXIT_FAILURE; return 0; } sum = statbuf.st_blocks; if (slink_depth == 1) { slink_depth = INT_MAX; /* Convert -H to -L. */ } } } if (statbuf.st_nlink > count_hardlinks) { /* Add files/directories with links only once */ if (is_in_ino_dev_hashtable(&statbuf)) { return 0; } add_to_ino_dev_hashtable(&statbuf, NULL); } if (S_ISDIR(statbuf.st_mode)) { DIR *dir; struct dirent *entry; char *newfile; dir = warn_opendir(filename); if (!dir) { status = EXIT_FAILURE; return sum; } newfile = last_char_is(filename, '/'); if (newfile) *newfile = '\0'; while ((entry = readdir(dir))) { char *name = entry->d_name; newfile = concat_subpath_file(filename, name); if (newfile == NULL) continue; ++du_depth; sum += du(newfile); --du_depth; free(newfile); } closedir(dir); } else if (du_depth > print_files) { return sum; } if (du_depth <= max_print_depth) { print(sum, filename); } return sum; } int du_main(int argc, char **argv); int du_main(int argc, char **argv) { long total; int slink_depth_save; int print_final_total; char *smax_print_depth; unsigned opt; #if ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */ #if ENABLE_FEATURE_HUMAN_READABLE disp_hr = 512; #else disp_k = 0; #endif } #endif /* Note: SUSv3 specifies that -a and -s options cannot be used together * in strictly conforming applications. However, it also says that some * du implementations may produce output when -a and -s are used together. * gnu du exits with an error code in this case. We choose to simply * ignore -a. This is consistent with -s being equivalent to -d 0. */ #if ENABLE_FEATURE_HUMAN_READABLE opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s"; opt = getopt32(argc, argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth); if (opt & (1 << 9)) { /* -h opt */ disp_hr = 0; } if (opt & (1 << 10)) { /* -m opt */ disp_hr = 1024*1024; } if (opt & (1 << 2)) { /* -k opt */ disp_hr = 1024; } #else opt_complementary = "H-L:L-H:s-d:d-s"; opt = getopt32(argc, argv, "aHkLsx" "d:" "lc", &smax_print_depth); #if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K if (opt & (1 << 2)) { /* -k opt */ disp_k = 1; } #endif #endif if (opt & (1 << 0)) { /* -a opt */ print_files = INT_MAX; } if (opt & (1 << 1)) { /* -H opt */ slink_depth = 1; } if (opt & (1 << 3)) { /* -L opt */ slink_depth = INT_MAX; } if (opt & (1 << 4)) { /* -s opt */ max_print_depth = 0; } one_file_system = opt & (1 << 5); /* -x opt */ if (opt & (1 << 6)) { /* -d opt */ max_print_depth = xatoi_u(smax_print_depth); } if (opt & (1 << 7)) { /* -l opt */ count_hardlinks = MAXINT(nlink_t); } print_final_total = opt & (1 << 8); /* -c opt */ /* go through remaining args (if any) */ argv += optind; if (optind >= argc) { *--argv = (char*)"."; if (slink_depth == 1) { slink_depth = 0; } } slink_depth_save = slink_depth; total = 0; do { total += du(*argv); slink_depth = slink_depth_save; } while (*++argv); #if ENABLE_FEATURE_CLEAN_UP reset_ino_dev_hashtable(); #endif if (print_final_total) { print(total, "total"); } fflush_stdout_and_exit(status); }