/* vi: set sw=4 ts=4: */ /* * parse_mode implementation for busybox * * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* Mar 5, 2003 Manuel Novoa III * * This is the main work function for the 'mkdir' applet. As such, it * strives to be SUSv3 compliant in it's behaviour when recursively * making missing parent dirs, and in it's mode setting of the final * directory 'path'. * * To recursively build all missing intermediate directories, make * sure that (flags & FILEUTILS_RECUR) is non-zero. Newly created * intermediate directories will have at least u+wx perms. * * To set specific permissions on 'path', pass the appropriate 'mode' * val. Otherwise, pass -1 to get default permissions. */ #include "libbb.h" /* This function is used from NOFORK applets. It must not allocate anything */ int FAST_FUNC bb_make_directory(char *path, long mode, int flags) { mode_t cur_mask; mode_t org_mask; const char *fail_msg; char *s; char c; struct stat st; /* Happens on bb_make_directory(dirname("no_slashes"),...) */ if (LONE_CHAR(path, '.')) return 0; org_mask = cur_mask = (mode_t)-1L; s = path; while (1) { c = '\0'; if (flags & FILEUTILS_RECUR) { /* Get the parent */ /* Bypass leading non-'/'s and then subsequent '/'s */ while (*s) { if (*s == '/') { do { ++s; } while (*s == '/'); c = *s; /* Save the current char */ *s = '\0'; /* and replace it with nul */ break; } ++s; } } if (c != '\0') { /* Intermediate dirs: must have wx for user */ if (cur_mask == (mode_t)-1L) { /* wasn't done yet? */ mode_t new_mask; org_mask = umask(0); cur_mask = 0; /* Clear u=wx in umask - this ensures * they won't be cleared on mkdir */ new_mask = (org_mask & ~(mode_t)0300); //bb_error_msg("org_mask:%o cur_mask:%o", org_mask, new_mask); if (new_mask != cur_mask) { cur_mask = new_mask; umask(new_mask); } } } else { /* Last component: uses original umask */ //bb_error_msg("1 org_mask:%o", org_mask); if (org_mask != cur_mask) { cur_mask = org_mask; umask(org_mask); } } if (mkdir(path, 0777) < 0) { /* If we failed for any other reason than the directory * already exists, output a diagnostic and return -1 */ if ((errno != EEXIST && errno != EISDIR) || !(flags & FILEUTILS_RECUR) || ((stat(path, &st) < 0) || !S_ISDIR(st.st_mode)) ) { fail_msg = "create"; break; } /* Since the directory exists, don't attempt to change * permissions if it was the full target. Note that * this is not an error condition. */ if (!c) { goto ret0; } } if (!c) { /* Done. If necessary, update perms on the newly * created directory. Failure to update here _is_ * an error. */ if ((mode != -1) && (chmod(path, mode) < 0)) { fail_msg = "set permissions of"; break; } goto ret0; } /* Remove any inserted nul from the path (recursive mode) */ *s = c; } /* while (1) */ bb_perror_msg("can't %s directory '%s'", fail_msg, path); flags = -1; goto ret; ret0: flags = 0; ret: //bb_error_msg("2 org_mask:%o", org_mask); if (org_mask != cur_mask) umask(org_mask); return flags; }