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ash: cleanup part 2.5
This commit is contained in:
Denis Vlasenko
parent
a89150733a
commit
2de3d9fbee
313
shell/ash.c
313
shell/ash.c
@ -66,6 +66,15 @@
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#endif
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/* ============ Misc helpers */
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#define xbarrier() do { __asm__ __volatile__ ("": : :"memory"); } while (0)
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/* C99 say: "char" declaration may be signed or unsigned default */
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#define signed_char2int(sc) ((int)((signed char)sc))
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/* ============ Shell options */
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static const char *const optletters_optnames[] = {
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@ -192,13 +201,11 @@ static volatile sig_atomic_t pendingsigs;
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* much more efficient and portable. (But hacking the kernel is so much
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* more fun than worrying about efficiency and portability. :-))
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*/
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#define xbarrier() ({ __asm__ __volatile__ ("": : :"memory"); })
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#define INT_OFF \
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({ \
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do { \
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suppressint++; \
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xbarrier(); \
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0; \
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})
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} while (0)
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/*
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* Called to raise an exception. Since C doesn't include exceptions, we
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@ -263,38 +270,37 @@ force_int_on(void)
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#define FORCE_INT_ON force_int_on()
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#else
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#define INT_ON \
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({ \
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do { \
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xbarrier(); \
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if (--suppressint == 0 && intpending) raise_interrupt(); \
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0; \
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})
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if (--suppressint == 0 && intpending) \
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raise_interrupt(); \
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} while (0)
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#define FORCE_INT_ON \
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({ \
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do { \
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xbarrier(); \
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suppressint = 0; \
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if (intpending) raise_interrupt(); \
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0; \
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})
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if (intpending) \
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raise_interrupt(); \
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} while (0)
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#endif /* ASH_OPTIMIZE_FOR_SIZE */
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#define SAVE_INT(v) ((v) = suppressint)
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#define RESTORE_INT(v) \
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({ \
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do { \
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xbarrier(); \
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suppressint = (v); \
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if (suppressint == 0 && intpending) raise_interrupt(); \
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0; \
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})
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if (suppressint == 0 && intpending) \
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raise_interrupt(); \
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} while (0)
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#define EXSIGON \
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({ \
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do { \
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exsig++; \
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xbarrier(); \
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if (pendingsigs) \
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raise_exception(EXSIG); \
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0; \
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})
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} while (0)
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/* EXSIG is turned off by evalbltin(). */
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/*
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@ -406,7 +412,7 @@ out2str(const char *p)
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}
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/* ============ Parsing structures */
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/* ============ Parser structures */
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/* control characters in argument strings */
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#define CTLESC '\201' /* escape next character */
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@ -436,6 +442,8 @@ out2str(const char *p)
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#define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
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#define VSLENGTH 0xa /* ${#var} */
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static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
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#define NCMD 0
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#define NPIPE 1
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#define NREDIR 2
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@ -1361,21 +1369,25 @@ _STPUTC(int c, char *p)
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return p;
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}
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#define STARTSTACKSTR(p) ((p) = stackblock())
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#define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
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#define STARTSTACKSTR(p) ((p) = stackblock())
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#define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
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#define CHECKSTRSPACE(n, p) \
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({ \
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do { \
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char *q = (p); \
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size_t l = (n); \
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size_t m = sstrend - q; \
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if (l > m) \
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(p) = makestrspace(l, q); \
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0; \
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})
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} while (0)
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#define USTPUTC(c, p) (*p++ = (c))
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#define STACKSTRNUL(p) ((p) == sstrend ? (p = growstackstr(), *p = '\0') : (*p = '\0'))
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#define STACKSTRNUL(p) \
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do { \
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if ((p) == sstrend) \
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p = growstackstr(); \
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*p = '\0'; \
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} while (0)
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#define STUNPUTC(p) (--p)
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#define STTOPC(p) p[-1]
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#define STTOPC(p) (p[-1])
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#define STADJUST(amount, p) (p += (amount))
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#define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock())
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@ -1519,6 +1531,29 @@ nextopt(const char *optstring)
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}
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/* ============ Math support definitions */
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#if ENABLE_ASH_MATH_SUPPORT_64
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typedef int64_t arith_t;
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#define arith_t_type long long
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#else
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typedef long arith_t;
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#define arith_t_type long
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#endif
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#if ENABLE_ASH_MATH_SUPPORT
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static arith_t dash_arith(const char *);
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static arith_t arith(const char *expr, int *perrcode);
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#endif
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#if ENABLE_ASH_RANDOM_SUPPORT
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static unsigned long rseed;
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#ifndef DYNAMIC_VAR
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#define DYNAMIC_VAR
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#endif
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#endif
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/* ============ Shell variables */
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/* flags */
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@ -1532,9 +1567,9 @@ nextopt(const char *optstring)
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#define VNOSET 0x80 /* do not set variable - just readonly test */
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#define VNOSAVE 0x100 /* when text is on the heap before setvareq */
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#ifdef DYNAMIC_VAR
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# define VDYNAMIC 0x200 /* dynamic variable */
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# else
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# define VDYNAMIC 0
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# define VDYNAMIC 0x200 /* dynamic variable */
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#else
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# define VDYNAMIC 0
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#endif
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static const char defpathvar[] = "PATH=/usr/local/bin:/usr/bin:/sbin:/bin";
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@ -2401,12 +2436,6 @@ pwdcmd(int argc, char **argv)
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#define IBUFSIZ (BUFSIZ + 1)
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#define basebuf bb_common_bufsiz1 /* buffer for top level input file */
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/* shell.h */
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static const char spcstr[] = " ";
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static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
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/* Syntax classes */
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#define CWORD 0 /* character is nothing special */
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#define CNL 1 /* newline character */
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@ -2435,77 +2464,72 @@ static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
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#define PEOA_OR_PEOF PEOF
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#endif
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/* C99 say: "char" declaration may be signed or unsigned default */
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#define SC2INT(chr2may_be_negative_int) (int)((signed char)chr2may_be_negative_int)
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/*
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* is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
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* (assuming ascii char codes, as the original implementation did)
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*/
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#define is_special(c) \
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( (((unsigned int)c) - 33 < 32) \
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&& ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
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((((unsigned int)c) - 33 < 32) \
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&& ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
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/* number syntax index */
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#define BASESYNTAX 0 /* not in quotes */
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#define DQSYNTAX 1 /* in double quotes */
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#define SQSYNTAX 2 /* in single quotes */
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#define ARISYNTAX 3 /* in arithmetic */
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#if ENABLE_ASH_OPTIMIZE_FOR_SIZE
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#define USE_SIT_FUNCTION
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#endif
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/* number syntax index */
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#define BASESYNTAX 0 /* not in quotes */
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#define DQSYNTAX 1 /* in double quotes */
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#define SQSYNTAX 2 /* in single quotes */
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#define ARISYNTAX 3 /* in arithmetic */
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#if ENABLE_ASH_MATH_SUPPORT
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static const char S_I_T[][4] = {
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#if ENABLE_ASH_ALIAS
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{CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */
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{ CSPCL, CIGN, CIGN, CIGN }, /* 0, PEOA */
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#endif
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{CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */
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{CNL, CNL, CNL, CNL}, /* 2, \n */
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{CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */
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{CDQUOTE, CENDQUOTE, CWORD, CWORD}, /* 4, '"' */
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{CVAR, CVAR, CWORD, CVAR}, /* 5, $ */
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{CSQUOTE, CWORD, CENDQUOTE, CWORD}, /* 6, "'" */
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{CSPCL, CWORD, CWORD, CLP}, /* 7, ( */
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{CSPCL, CWORD, CWORD, CRP}, /* 8, ) */
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{CBACK, CBACK, CCTL, CBACK}, /* 9, \ */
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{CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */
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{CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */
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{ CSPCL, CWORD, CWORD, CWORD }, /* 1, ' ' */
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{ CNL, CNL, CNL, CNL }, /* 2, \n */
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{ CWORD, CCTL, CCTL, CWORD }, /* 3, !*-/:=?[]~ */
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{ CDQUOTE, CENDQUOTE, CWORD, CWORD }, /* 4, '"' */
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{ CVAR, CVAR, CWORD, CVAR }, /* 5, $ */
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{ CSQUOTE, CWORD, CENDQUOTE, CWORD }, /* 6, "'" */
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{ CSPCL, CWORD, CWORD, CLP }, /* 7, ( */
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{ CSPCL, CWORD, CWORD, CRP }, /* 8, ) */
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{ CBACK, CBACK, CCTL, CBACK }, /* 9, \ */
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{ CBQUOTE, CBQUOTE, CWORD, CBQUOTE }, /* 10, ` */
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{ CENDVAR, CENDVAR, CWORD, CENDVAR }, /* 11, } */
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#ifndef USE_SIT_FUNCTION
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{CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
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{CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
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{CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */
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{ CENDFILE, CENDFILE, CENDFILE, CENDFILE }, /* 12, PEOF */
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{ CWORD, CWORD, CWORD, CWORD }, /* 13, 0-9A-Za-z */
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{ CCTL, CCTL, CCTL, CCTL } /* 14, CTLESC ... */
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#endif
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};
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#else
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static const char S_I_T[][3] = {
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#if ENABLE_ASH_ALIAS
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{CSPCL, CIGN, CIGN}, /* 0, PEOA */
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{ CSPCL, CIGN, CIGN }, /* 0, PEOA */
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#endif
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{CSPCL, CWORD, CWORD}, /* 1, ' ' */
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{CNL, CNL, CNL}, /* 2, \n */
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{CWORD, CCTL, CCTL}, /* 3, !*-/:=?[]~ */
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{CDQUOTE, CENDQUOTE, CWORD}, /* 4, '"' */
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{CVAR, CVAR, CWORD}, /* 5, $ */
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{CSQUOTE, CWORD, CENDQUOTE}, /* 6, "'" */
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{CSPCL, CWORD, CWORD}, /* 7, ( */
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{CSPCL, CWORD, CWORD}, /* 8, ) */
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{CBACK, CBACK, CCTL}, /* 9, \ */
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{CBQUOTE, CBQUOTE, CWORD}, /* 10, ` */
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{CENDVAR, CENDVAR, CWORD}, /* 11, } */
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{ CSPCL, CWORD, CWORD }, /* 1, ' ' */
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{ CNL, CNL, CNL }, /* 2, \n */
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{ CWORD, CCTL, CCTL }, /* 3, !*-/:=?[]~ */
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{ CDQUOTE, CENDQUOTE, CWORD }, /* 4, '"' */
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{ CVAR, CVAR, CWORD }, /* 5, $ */
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{ CSQUOTE, CWORD, CENDQUOTE }, /* 6, "'" */
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{ CSPCL, CWORD, CWORD }, /* 7, ( */
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{ CSPCL, CWORD, CWORD }, /* 8, ) */
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{ CBACK, CBACK, CCTL }, /* 9, \ */
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{ CBQUOTE, CBQUOTE, CWORD }, /* 10, ` */
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{ CENDVAR, CENDVAR, CWORD }, /* 11, } */
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#ifndef USE_SIT_FUNCTION
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{CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
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{CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
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{CCTL, CCTL, CCTL} /* 14, CTLESC ... */
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{ CENDFILE, CENDFILE, CENDFILE }, /* 12, PEOF */
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{ CWORD, CWORD, CWORD }, /* 13, 0-9A-Za-z */
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{ CCTL, CCTL, CCTL } /* 14, CTLESC ... */
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#endif
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};
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#endif /* ASH_MATH_SUPPORT */
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#ifdef USE_SIT_FUNCTION
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#define U_C(c) ((unsigned char)(c))
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static int
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SIT(int c, int syntax)
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{
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@ -2535,9 +2559,13 @@ SIT(int c, int syntax)
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indx = 0;
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else
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#endif
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if (U_C(c) >= U_C(CTLESC) && U_C(c) <= U_C(CTLQUOTEMARK))
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#define U_C(c) ((unsigned char)(c))
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if ((unsigned char)c >= (unsigned char)(CTLESC)
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&& (unsigned char)c <= (unsigned char)(CTLQUOTEMARK)
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) {
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return CCTL;
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else {
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} else {
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s = strchr(spec_symbls, c);
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if (s == NULL || *s == '\0')
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return CWORD;
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@ -2546,41 +2574,39 @@ SIT(int c, int syntax)
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return S_I_T[indx][syntax];
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}
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#else /* USE_SIT_FUNCTION */
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#define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
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#else /* !USE_SIT_FUNCTION */
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#if ENABLE_ASH_ALIAS
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#define CSPCL_CIGN_CIGN_CIGN 0
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#define CSPCL_CWORD_CWORD_CWORD 1
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#define CNL_CNL_CNL_CNL 2
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#define CWORD_CCTL_CCTL_CWORD 3
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#define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
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#define CVAR_CVAR_CWORD_CVAR 5
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#define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
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#define CSPCL_CWORD_CWORD_CLP 7
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#define CSPCL_CWORD_CWORD_CRP 8
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#define CBACK_CBACK_CCTL_CBACK 9
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#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
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#define CENDVAR_CENDVAR_CWORD_CENDVAR 11
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#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
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#define CWORD_CWORD_CWORD_CWORD 13
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#define CCTL_CCTL_CCTL_CCTL 14
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#define CSPCL_CIGN_CIGN_CIGN 0
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#define CSPCL_CWORD_CWORD_CWORD 1
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#define CNL_CNL_CNL_CNL 2
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#define CWORD_CCTL_CCTL_CWORD 3
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#define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
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#define CVAR_CVAR_CWORD_CVAR 5
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#define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
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#define CSPCL_CWORD_CWORD_CLP 7
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#define CSPCL_CWORD_CWORD_CRP 8
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#define CBACK_CBACK_CCTL_CBACK 9
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#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
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#define CENDVAR_CENDVAR_CWORD_CENDVAR 11
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#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
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#define CWORD_CWORD_CWORD_CWORD 13
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#define CCTL_CCTL_CCTL_CCTL 14
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#else
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#define CSPCL_CWORD_CWORD_CWORD 0
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#define CNL_CNL_CNL_CNL 1
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#define CWORD_CCTL_CCTL_CWORD 2
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#define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
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#define CVAR_CVAR_CWORD_CVAR 4
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#define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
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#define CSPCL_CWORD_CWORD_CLP 6
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#define CSPCL_CWORD_CWORD_CRP 7
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#define CBACK_CBACK_CCTL_CBACK 8
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#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
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#define CENDVAR_CENDVAR_CWORD_CENDVAR 10
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#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
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#define CWORD_CWORD_CWORD_CWORD 12
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#define CCTL_CCTL_CCTL_CCTL 13
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#define CSPCL_CWORD_CWORD_CWORD 0
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#define CNL_CNL_CNL_CNL 1
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#define CWORD_CCTL_CCTL_CWORD 2
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#define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
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#define CVAR_CVAR_CWORD_CVAR 4
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#define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
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#define CSPCL_CWORD_CWORD_CLP 6
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#define CSPCL_CWORD_CWORD_CRP 7
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#define CBACK_CBACK_CCTL_CBACK 8
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#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
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#define CENDVAR_CENDVAR_CWORD_CENDVAR 10
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#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
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#define CWORD_CWORD_CWORD_CWORD 12
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#define CCTL_CCTL_CCTL_CCTL 13
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#endif
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static const char syntax_index_table[258] = {
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@ -2847,32 +2873,11 @@ static const char syntax_index_table[258] = {
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/* 257 127 */ CWORD_CWORD_CWORD_CWORD,
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};
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#define SIT(c, syntax) (S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax])
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#endif /* USE_SIT_FUNCTION */
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/* exec.h */
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#if ENABLE_ASH_MATH_SUPPORT_64
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typedef int64_t arith_t;
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#define arith_t_type long long
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#else
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typedef long arith_t;
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#define arith_t_type long
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#endif
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#if ENABLE_ASH_MATH_SUPPORT
|
||||
static arith_t dash_arith(const char *);
|
||||
static arith_t arith(const char *expr, int *perrcode);
|
||||
#endif
|
||||
|
||||
#if ENABLE_ASH_RANDOM_SUPPORT
|
||||
static unsigned long rseed;
|
||||
# ifndef DYNAMIC_VAR
|
||||
# define DYNAMIC_VAR
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
/* main.h */
|
||||
|
||||
static void readcmdfile(char *);
|
||||
@ -4244,10 +4249,10 @@ cmdlist(union node *np, int sep)
|
||||
{
|
||||
for (; np; np = np->narg.next) {
|
||||
if (!sep)
|
||||
cmdputs(spcstr);
|
||||
cmdputs(" ");
|
||||
cmdtxt(np);
|
||||
if (sep && np->narg.next)
|
||||
cmdputs(spcstr);
|
||||
cmdputs(" ");
|
||||
}
|
||||
}
|
||||
|
||||
@ -4810,7 +4815,7 @@ memtodest(const char *p, size_t len, int syntax, int quotes)
|
||||
q = makestrspace(len * 2, q);
|
||||
|
||||
while (len--) {
|
||||
int c = SC2INT(*p++);
|
||||
int c = signed_char2int(*p++);
|
||||
if (!c)
|
||||
continue;
|
||||
if (quotes && (SIT(c, syntax) == CCTL || SIT(c, syntax) == CBACK))
|
||||
@ -5477,7 +5482,7 @@ varvalue(char *name, int varflags, int flags)
|
||||
goto param;
|
||||
/* fall through */
|
||||
case '*':
|
||||
sep = ifsset() ? SC2INT(ifsval()[0]) : ' ';
|
||||
sep = ifsset() ? signed_char2int(ifsval()[0]) : ' ';
|
||||
if (quotes && (SIT(sep, syntax) == CCTL || SIT(sep, syntax) == CBACK))
|
||||
sepq = 1;
|
||||
param:
|
||||
@ -8510,7 +8515,7 @@ preadbuffer(void)
|
||||
#endif
|
||||
popstring();
|
||||
if (--parsenleft >= 0)
|
||||
return SC2INT(*parsenextc++);
|
||||
return signed_char2int(*parsenextc++);
|
||||
}
|
||||
if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
|
||||
return PEOF;
|
||||
@ -8563,25 +8568,20 @@ preadbuffer(void)
|
||||
|
||||
*q = savec;
|
||||
|
||||
return SC2INT(*parsenextc++);
|
||||
return signed_char2int(*parsenextc++);
|
||||
}
|
||||
|
||||
#define pgetc_as_macro() (--parsenleft >= 0? SC2INT(*parsenextc++) : preadbuffer())
|
||||
|
||||
#if ENABLE_ASH_OPTIMIZE_FOR_SIZE
|
||||
#define pgetc_macro() pgetc()
|
||||
#define pgetc_as_macro() (--parsenleft >= 0? signed_char2int(*parsenextc++) : preadbuffer())
|
||||
static int
|
||||
pgetc(void)
|
||||
{
|
||||
return pgetc_as_macro();
|
||||
}
|
||||
|
||||
#if ENABLE_ASH_OPTIMIZE_FOR_SIZE
|
||||
#define pgetc_macro() pgetc()
|
||||
#else
|
||||
#define pgetc_macro() pgetc_as_macro()
|
||||
static int
|
||||
pgetc(void)
|
||||
{
|
||||
return pgetc_macro();
|
||||
}
|
||||
#define pgetc_macro() pgetc_as_macro()
|
||||
#endif
|
||||
|
||||
/*
|
||||
@ -8810,6 +8810,7 @@ setinputstring(char *string)
|
||||
*
|
||||
* Routines to check for mail.
|
||||
*/
|
||||
|
||||
#if ENABLE_ASH_MAIL
|
||||
|
||||
#define MAXMBOXES 10
|
||||
@ -8870,6 +8871,7 @@ changemail(const char *val)
|
||||
{
|
||||
mail_var_path_changed++;
|
||||
}
|
||||
|
||||
#endif /* ASH_MAIL */
|
||||
|
||||
|
||||
@ -9133,7 +9135,7 @@ showvars(const char *sep_prefix, int on, int off)
|
||||
ep = listvars(on, off, &epend);
|
||||
qsort(ep, epend - ep, sizeof(char *), vpcmp);
|
||||
|
||||
sep = *sep_prefix ? spcstr : sep_prefix;
|
||||
sep = *sep_prefix ? " " : sep_prefix;
|
||||
|
||||
for (; ep < epend; ep++) {
|
||||
const char *p;
|
||||
@ -10991,9 +10993,8 @@ readcmdfile(char *name)
|
||||
}
|
||||
|
||||
|
||||
/* ============ redir.c */
|
||||
|
||||
/*
|
||||
/* ============ redir.c
|
||||
*
|
||||
* Code for dealing with input/output redirection.
|
||||
*/
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user