dd5702d69
Denis Vlasenko
2008-03-19
Subject
...and actually adding new file now...
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libbb/die_if_bad_username.c+34 -0
| @@ -0,0 +1,34 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Ckeck user and group names for illegal characters |
| + | * |
| + | * Copyright (C) 2008 Tito Ragusa <[email protected]> |
| + | * |
| + | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| + | */ |
| + | |
| + | #include "libbb.h" |
| + | |
| + | /* To avoid problems, the username should consist only of |
| + | * letters, digits, underscores, periods, at signs and dashes, |
| + | * and not start with a dash (as defined by IEEE Std 1003.1-2001). |
| + | * For compatibility with Samba machine accounts $ is also supported |
| + | * at the end of the username. |
| + | */ |
| + | |
| + | void die_if_bad_username(const char *name) |
| + | { |
| + | int i = 0; |
| + | |
| + | do { |
| + | if (!isalnum(*name) |
| + | && !(*name == '_') |
| + | && !(*name == '.') |
| + | && !(*name == '@') |
| + | && !(*name == '-' && i) |
| + | && !(*name == '$' && !*(name + 1)) |
| + | ) |
| + | bb_error_msg_and_die("illegal character '%c'", *name); |
| + | i++; |
| + | } while (*++name); |
| + | } |