diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2010-01-13 18:22:35 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-01-13 18:22:35 +0100 |
| commit | 25d9b91d94688b9b022224b95c06cbd4b75da085 (patch) | |
| tree | 6d3b5dd63f3fab3fba018c73ae4bc64e5a38b150 /shell/builtin_read.c | |
| parent | 03d81ef43aca1808255d1a2a19ec394ed805eee8 (diff) | |
shell/read: check that variable names are sane
function old new delta
shell_builtin_read 1000 1055 +55
parse_command 1460 1463 +3
builtin_umask 121 123 +2
is_well_formed_var_name 73 66 -7
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/builtin_read.c')
| -rw-r--r-- | shell/builtin_read.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/shell/builtin_read.c b/shell/builtin_read.c index 73b0949cf..954e4cd14 100644 --- a/shell/builtin_read.c +++ b/shell/builtin_read.c @@ -39,6 +39,7 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val), unsigned end_ms; /* -t TIMEOUT */ int fd; /* -u FD */ int nchars; /* -n NUM */ + char **pp; char *buffer; struct termios tty, old_tty; const char *retval; @@ -46,6 +47,16 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val), int startword; smallint backslash; + pp = argv; + while (*pp) { + if (!is_well_formed_var_name(*pp, '\0')) { + /* Mimic bash message */ + bb_error_msg("read: '%s': not a valid identifier", *pp); + return (const char *)(uintptr_t)1; + } + pp++; + } + nchars = 0; /* if != 0, -n is in effect */ if (opt_n) { nchars = bb_strtou(opt_n, NULL, 10); |