diff options
Diffstat (limited to 'libbb/make_directory.c')
-rw-r--r-- | libbb/make_directory.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/libbb/make_directory.c b/libbb/make_directory.c new file mode 100644 index 0000000..391493c --- /dev/null +++ b/libbb/make_directory.c @@ -0,0 +1,98 @@ +/* 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 tarball for details. + */ + +/* 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 mask; + const char *fail_msg; + char *s = path; + char c; + struct stat st; + + mask = umask(0); + umask(mask & ~0300); /* Ensure intermediate dirs are wx */ + + 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) /* Last component uses orig umask */ + umask(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 + || !(flags & FILEUTILS_RECUR) + || ((stat(path, &st) < 0) || !S_ISDIR(st.st_mode)) + ) { + fail_msg = "create"; + umask(mask); + 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) { + umask(mask); + return 0; + } + } + + 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; + } + return 0; + } + + /* Remove any inserted nul from the path (recursive mode). */ + *s = c; + } /* while (1) */ + + bb_perror_msg("cannot %s directory '%s'", fail_msg, path); + return -1; +} |