Last change
on this file since 3842 was 3320, checked in by Bruno Cornec, 10 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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-
Property svn:eol-style
set to
native
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File size:
1003 bytes
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Rev | Line | |
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[3320] | 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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