Last change
on this file since 3754 was 2725, checked in by Bruno Cornec, 13 years ago |
- Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
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-
Property svn:eol-style
set to
native
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File size:
1003 bytes
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Check user and group names for illegal characters
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4 | *
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5 | * Copyright (C) 2008 Tito Ragusa <farmatito@tiscali.it>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | #include "libbb.h"
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11 |
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12 | /* To avoid problems, the username should consist only of
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13 | * letters, digits, underscores, periods, at signs and dashes,
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14 | * and not start with a dash (as defined by IEEE Std 1003.1-2001).
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15 | * For compatibility with Samba machine accounts $ is also supported
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16 | * at the end of the username.
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17 | */
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18 |
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19 | void FAST_FUNC die_if_bad_username(const char *name)
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20 | {
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21 | /* 1st char being dash or dot isn't valid: */
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22 | goto skip;
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23 | /* For example, name like ".." can make adduser
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24 | * chown "/home/.." recursively - NOT GOOD
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25 | */
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26 |
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27 | do {
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28 | if (*name == '-' || *name == '.')
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29 | continue;
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30 | skip:
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31 | if (isalnum(*name)
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32 | || *name == '_'
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33 | || *name == '@'
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34 | || (*name == '$' && !name[1])
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35 | ) {
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36 | continue;
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37 | }
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38 | bb_error_msg_and_die("illegal character '%c'", *name);
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39 | } while (*++name);
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40 | }
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