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| author | Denys Vlasenko | 2016-12-12 17:39:12 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2016-12-12 17:39:12 +0100 |
| commit | 2fe66b1d2dc50f9d5ed98d5c537745f3066fb4d8 (patch) | |
| tree | 1019d90dd8842539a2c23ef260c2a6749df28067 /shell | |
| parent | b6afcc78194aa0801544bc606b9562339c846eb4 (diff) | |
| download | busybox-2fe66b1d2dc50f9d5ed98d5c537745f3066fb4d8.zip busybox-2fe66b1d2dc50f9d5ed98d5c537745f3066fb4d8.tar.gz | |
ash: fix signed char expansion bug
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/shell/ash.c b/shell/ash.c index 91bcccb..8d8cc46 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -3113,7 +3113,18 @@ static const uint8_t syntax_index_table[] ALIGN1 = { # endif }; +#if 1 # define SIT(c, syntax) ((S_I_T[syntax_index_table[c]] >> ((syntax)*4)) & 0xf) +#else /* debug version, caught one signed char bug */ +# define SIT(c, syntax) \ + ({ \ + if ((c) < 0 || (c) > (PEOF + ENABLE_ASH_ALIAS)) \ + bb_error_msg_and_die("line:%d c:%d", __LINE__, (c)); \ + if ((syntax) < 0 || (syntax) > (2 + ENABLE_SH_MATH_SUPPORT)) \ + bb_error_msg_and_die("line:%d c:%d", __LINE__, (c)); \ + ((S_I_T[syntax_index_table[c]] >> ((syntax)*4)) & 0xf); \ + }) +#endif #endif /* !USE_SIT_FUNCTION */ @@ -5869,14 +5880,15 @@ memtodest(const char *p, size_t len, int syntax, int quotes) do { unsigned char c = *p++; if (c) { - int n = SIT(c, syntax); - if ((quotes & QUOTES_ESC) - && ((n == CCTL) - || (((quotes & EXP_FULL) || syntax != BASESYNTAX) - && n == CBACK) - ) - ) { - USTPUTC(CTLESC, q); + if (quotes & QUOTES_ESC) { + int n = SIT(c, syntax); + if (n == CCTL + || (((quotes & EXP_FULL) || syntax != BASESYNTAX) + && n == CBACK + ) + ) { + USTPUTC(CTLESC, q); + } } } else if (!(quotes & QUOTES_KEEPNUL)) continue; @@ -10051,7 +10063,7 @@ pgetc(void) return g_parsefile->lastc[--g_parsefile->unget]; if (--g_parsefile->left_in_line >= 0) - c = (signed char)*g_parsefile->next_to_pgetc++; + c = (unsigned char)*g_parsefile->next_to_pgetc++; else c = preadbuffer(); |