#endif
+/* ============ Misc helpers */
+
+#define xbarrier() do { __asm__ __volatile__ ("": : :"memory"); } while (0)
+
+/* C99 say: "char" declaration may be signed or unsigned default */
+#define signed_char2int(sc) ((int)((signed char)sc))
+
+
+
/* ============ Shell options */
static const char *const optletters_optnames[] = {
* much more efficient and portable. (But hacking the kernel is so much
* more fun than worrying about efficiency and portability. :-))
*/
-#define xbarrier() ({ __asm__ __volatile__ ("": : :"memory"); })
#define INT_OFF \
- ({ \
+ do { \
suppressint++; \
xbarrier(); \
- 0; \
- })
+ } while (0)
/*
* Called to raise an exception. Since C doesn't include exceptions, we
#define FORCE_INT_ON force_int_on()
#else
#define INT_ON \
- ({ \
+ do { \
xbarrier(); \
- if (--suppressint == 0 && intpending) raise_interrupt(); \
- 0; \
- })
+ if (--suppressint == 0 && intpending) \
+ raise_interrupt(); \
+ } while (0)
#define FORCE_INT_ON \
- ({ \
+ do { \
xbarrier(); \
suppressint = 0; \
- if (intpending) raise_interrupt(); \
- 0; \
- })
+ if (intpending) \
+ raise_interrupt(); \
+ } while (0)
#endif /* ASH_OPTIMIZE_FOR_SIZE */
#define SAVE_INT(v) ((v) = suppressint)
#define RESTORE_INT(v) \
- ({ \
+ do { \
xbarrier(); \
suppressint = (v); \
- if (suppressint == 0 && intpending) raise_interrupt(); \
- 0; \
- })
+ if (suppressint == 0 && intpending) \
+ raise_interrupt(); \
+ } while (0)
#define EXSIGON \
- ({ \
+ do { \
exsig++; \
xbarrier(); \
if (pendingsigs) \
raise_exception(EXSIG); \
- 0; \
- })
+ } while (0)
/* EXSIG is turned off by evalbltin(). */
/*
}
-/* ============ Parsing structures */
+/* ============ Parser structures */
/* control characters in argument strings */
#define CTLESC '\201' /* escape next character */
#define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
#define VSLENGTH 0xa /* ${#var} */
+static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
+
#define NCMD 0
#define NPIPE 1
#define NREDIR 2
return p;
}
-#define STARTSTACKSTR(p) ((p) = stackblock())
-#define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
+#define STARTSTACKSTR(p) ((p) = stackblock())
+#define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
#define CHECKSTRSPACE(n, p) \
- ({ \
+ do { \
char *q = (p); \
size_t l = (n); \
size_t m = sstrend - q; \
if (l > m) \
(p) = makestrspace(l, q); \
- 0; \
- })
+ } while (0)
#define USTPUTC(c, p) (*p++ = (c))
-#define STACKSTRNUL(p) ((p) == sstrend ? (p = growstackstr(), *p = '\0') : (*p = '\0'))
+#define STACKSTRNUL(p) \
+ do { \
+ if ((p) == sstrend) \
+ p = growstackstr(); \
+ *p = '\0'; \
+ } while (0)
#define STUNPUTC(p) (--p)
-#define STTOPC(p) p[-1]
+#define STTOPC(p) (p[-1])
#define STADJUST(amount, p) (p += (amount))
#define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock())
}
+/* ============ Math support definitions */
+
+#if ENABLE_ASH_MATH_SUPPORT_64
+typedef int64_t arith_t;
+#define arith_t_type long long
+#else
+typedef long arith_t;
+#define arith_t_type long
+#endif
+
+#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
+
+
/* ============ Shell variables */
/* flags */
#define VNOSET 0x80 /* do not set variable - just readonly test */
#define VNOSAVE 0x100 /* when text is on the heap before setvareq */
#ifdef DYNAMIC_VAR
-# define VDYNAMIC 0x200 /* dynamic variable */
-# else
-# define VDYNAMIC 0
+# define VDYNAMIC 0x200 /* dynamic variable */
+#else
+# define VDYNAMIC 0
#endif
static const char defpathvar[] = "PATH=/usr/local/bin:/usr/bin:/sbin:/bin";
#define IBUFSIZ (BUFSIZ + 1)
#define basebuf bb_common_bufsiz1 /* buffer for top level input file */
-
-/* shell.h */
-
-static const char spcstr[] = " ";
-static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
-
/* Syntax classes */
#define CWORD 0 /* character is nothing special */
#define CNL 1 /* newline character */
#define PEOA_OR_PEOF PEOF
#endif
-/* C99 say: "char" declaration may be signed or unsigned default */
-#define SC2INT(chr2may_be_negative_int) (int)((signed char)chr2may_be_negative_int)
-
/*
* is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
* (assuming ascii char codes, as the original implementation did)
*/
#define is_special(c) \
- ( (((unsigned int)c) - 33 < 32) \
- && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
+ ((((unsigned int)c) - 33 < 32) \
+ && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
+
+/* number syntax index */
+#define BASESYNTAX 0 /* not in quotes */
+#define DQSYNTAX 1 /* in double quotes */
+#define SQSYNTAX 2 /* in single quotes */
+#define ARISYNTAX 3 /* in arithmetic */
#if ENABLE_ASH_OPTIMIZE_FOR_SIZE
#define USE_SIT_FUNCTION
#endif
-/* number syntax index */
-#define BASESYNTAX 0 /* not in quotes */
-#define DQSYNTAX 1 /* in double quotes */
-#define SQSYNTAX 2 /* in single quotes */
-#define ARISYNTAX 3 /* in arithmetic */
-
#if ENABLE_ASH_MATH_SUPPORT
static const char S_I_T[][4] = {
#if ENABLE_ASH_ALIAS
- {CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */
-#endif
- {CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */
- {CNL, CNL, CNL, CNL}, /* 2, \n */
- {CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */
- {CDQUOTE, CENDQUOTE, CWORD, CWORD}, /* 4, '"' */
- {CVAR, CVAR, CWORD, CVAR}, /* 5, $ */
- {CSQUOTE, CWORD, CENDQUOTE, CWORD}, /* 6, "'" */
- {CSPCL, CWORD, CWORD, CLP}, /* 7, ( */
- {CSPCL, CWORD, CWORD, CRP}, /* 8, ) */
- {CBACK, CBACK, CCTL, CBACK}, /* 9, \ */
- {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */
- {CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */
+ { CSPCL, CIGN, CIGN, CIGN }, /* 0, PEOA */
+#endif
+ { CSPCL, CWORD, CWORD, CWORD }, /* 1, ' ' */
+ { CNL, CNL, CNL, CNL }, /* 2, \n */
+ { CWORD, CCTL, CCTL, CWORD }, /* 3, !*-/:=?[]~ */
+ { CDQUOTE, CENDQUOTE, CWORD, CWORD }, /* 4, '"' */
+ { CVAR, CVAR, CWORD, CVAR }, /* 5, $ */
+ { CSQUOTE, CWORD, CENDQUOTE, CWORD }, /* 6, "'" */
+ { CSPCL, CWORD, CWORD, CLP }, /* 7, ( */
+ { CSPCL, CWORD, CWORD, CRP }, /* 8, ) */
+ { CBACK, CBACK, CCTL, CBACK }, /* 9, \ */
+ { CBQUOTE, CBQUOTE, CWORD, CBQUOTE }, /* 10, ` */
+ { CENDVAR, CENDVAR, CWORD, CENDVAR }, /* 11, } */
#ifndef USE_SIT_FUNCTION
- {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
- {CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
- {CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */
+ { CENDFILE, CENDFILE, CENDFILE, CENDFILE }, /* 12, PEOF */
+ { CWORD, CWORD, CWORD, CWORD }, /* 13, 0-9A-Za-z */
+ { CCTL, CCTL, CCTL, CCTL } /* 14, CTLESC ... */
#endif
};
#else
static const char S_I_T[][3] = {
#if ENABLE_ASH_ALIAS
- {CSPCL, CIGN, CIGN}, /* 0, PEOA */
-#endif
- {CSPCL, CWORD, CWORD}, /* 1, ' ' */
- {CNL, CNL, CNL}, /* 2, \n */
- {CWORD, CCTL, CCTL}, /* 3, !*-/:=?[]~ */
- {CDQUOTE, CENDQUOTE, CWORD}, /* 4, '"' */
- {CVAR, CVAR, CWORD}, /* 5, $ */
- {CSQUOTE, CWORD, CENDQUOTE}, /* 6, "'" */
- {CSPCL, CWORD, CWORD}, /* 7, ( */
- {CSPCL, CWORD, CWORD}, /* 8, ) */
- {CBACK, CBACK, CCTL}, /* 9, \ */
- {CBQUOTE, CBQUOTE, CWORD}, /* 10, ` */
- {CENDVAR, CENDVAR, CWORD}, /* 11, } */
+ { CSPCL, CIGN, CIGN }, /* 0, PEOA */
+#endif
+ { CSPCL, CWORD, CWORD }, /* 1, ' ' */
+ { CNL, CNL, CNL }, /* 2, \n */
+ { CWORD, CCTL, CCTL }, /* 3, !*-/:=?[]~ */
+ { CDQUOTE, CENDQUOTE, CWORD }, /* 4, '"' */
+ { CVAR, CVAR, CWORD }, /* 5, $ */
+ { CSQUOTE, CWORD, CENDQUOTE }, /* 6, "'" */
+ { CSPCL, CWORD, CWORD }, /* 7, ( */
+ { CSPCL, CWORD, CWORD }, /* 8, ) */
+ { CBACK, CBACK, CCTL }, /* 9, \ */
+ { CBQUOTE, CBQUOTE, CWORD }, /* 10, ` */
+ { CENDVAR, CENDVAR, CWORD }, /* 11, } */
#ifndef USE_SIT_FUNCTION
- {CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
- {CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
- {CCTL, CCTL, CCTL} /* 14, CTLESC ... */
+ { CENDFILE, CENDFILE, CENDFILE }, /* 12, PEOF */
+ { CWORD, CWORD, CWORD }, /* 13, 0-9A-Za-z */
+ { CCTL, CCTL, CCTL } /* 14, CTLESC ... */
#endif
};
#endif /* ASH_MATH_SUPPORT */
#ifdef USE_SIT_FUNCTION
-#define U_C(c) ((unsigned char)(c))
-
static int
SIT(int c, int syntax)
{
indx = 0;
else
#endif
- if (U_C(c) >= U_C(CTLESC) && U_C(c) <= U_C(CTLQUOTEMARK))
+#define U_C(c) ((unsigned char)(c))
+
+ if ((unsigned char)c >= (unsigned char)(CTLESC)
+ && (unsigned char)c <= (unsigned char)(CTLQUOTEMARK)
+ ) {
return CCTL;
- else {
+ } else {
s = strchr(spec_symbls, c);
if (s == NULL || *s == '\0')
return CWORD;
return S_I_T[indx][syntax];
}
-#else /* USE_SIT_FUNCTION */
-
-#define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
+#else /* !USE_SIT_FUNCTION */
#if ENABLE_ASH_ALIAS
-#define CSPCL_CIGN_CIGN_CIGN 0
-#define CSPCL_CWORD_CWORD_CWORD 1
-#define CNL_CNL_CNL_CNL 2
-#define CWORD_CCTL_CCTL_CWORD 3
-#define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
-#define CVAR_CVAR_CWORD_CVAR 5
-#define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
-#define CSPCL_CWORD_CWORD_CLP 7
-#define CSPCL_CWORD_CWORD_CRP 8
-#define CBACK_CBACK_CCTL_CBACK 9
-#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
-#define CENDVAR_CENDVAR_CWORD_CENDVAR 11
-#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
-#define CWORD_CWORD_CWORD_CWORD 13
-#define CCTL_CCTL_CCTL_CCTL 14
+#define CSPCL_CIGN_CIGN_CIGN 0
+#define CSPCL_CWORD_CWORD_CWORD 1
+#define CNL_CNL_CNL_CNL 2
+#define CWORD_CCTL_CCTL_CWORD 3
+#define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
+#define CVAR_CVAR_CWORD_CVAR 5
+#define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
+#define CSPCL_CWORD_CWORD_CLP 7
+#define CSPCL_CWORD_CWORD_CRP 8
+#define CBACK_CBACK_CCTL_CBACK 9
+#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
+#define CENDVAR_CENDVAR_CWORD_CENDVAR 11
+#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
+#define CWORD_CWORD_CWORD_CWORD 13
+#define CCTL_CCTL_CCTL_CCTL 14
#else
-#define CSPCL_CWORD_CWORD_CWORD 0
-#define CNL_CNL_CNL_CNL 1
-#define CWORD_CCTL_CCTL_CWORD 2
-#define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
-#define CVAR_CVAR_CWORD_CVAR 4
-#define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
-#define CSPCL_CWORD_CWORD_CLP 6
-#define CSPCL_CWORD_CWORD_CRP 7
-#define CBACK_CBACK_CCTL_CBACK 8
-#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
-#define CENDVAR_CENDVAR_CWORD_CENDVAR 10
-#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
-#define CWORD_CWORD_CWORD_CWORD 12
-#define CCTL_CCTL_CCTL_CCTL 13
+#define CSPCL_CWORD_CWORD_CWORD 0
+#define CNL_CNL_CNL_CNL 1
+#define CWORD_CCTL_CCTL_CWORD 2
+#define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
+#define CVAR_CVAR_CWORD_CVAR 4
+#define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
+#define CSPCL_CWORD_CWORD_CLP 6
+#define CSPCL_CWORD_CWORD_CRP 7
+#define CBACK_CBACK_CCTL_CBACK 8
+#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
+#define CENDVAR_CENDVAR_CWORD_CENDVAR 10
+#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
+#define CWORD_CWORD_CWORD_CWORD 12
+#define CCTL_CCTL_CCTL_CCTL 13
#endif
static const char syntax_index_table[258] = {
/* 257 127 */ CWORD_CWORD_CWORD_CWORD,
};
-#endif /* USE_SIT_FUNCTION */
-
-
-/* exec.h */
-
-#if ENABLE_ASH_MATH_SUPPORT_64
-typedef int64_t arith_t;
-#define arith_t_type long long
-#else
-typedef long arith_t;
-#define arith_t_type long
-#endif
-
-#if ENABLE_ASH_MATH_SUPPORT
-static arith_t dash_arith(const char *);
-static arith_t arith(const char *expr, int *perrcode);
-#endif
+#define SIT(c, syntax) (S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax])
-#if ENABLE_ASH_RANDOM_SUPPORT
-static unsigned long rseed;
-# ifndef DYNAMIC_VAR
-# define DYNAMIC_VAR
-# endif
-#endif
+#endif /* USE_SIT_FUNCTION */
/* main.h */
{
for (; np; np = np->narg.next) {
if (!sep)
- cmdputs(spcstr);
+ cmdputs(" ");
cmdtxt(np);
if (sep && np->narg.next)
- cmdputs(spcstr);
+ cmdputs(" ");
}
}
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))
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:
#endif
popstring();
if (--parsenleft >= 0)
- return SC2INT(*parsenextc++);
+ return signed_char2int(*parsenextc++);
}
if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
return PEOF;
*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
/*
*
* Routines to check for mail.
*/
+
#if ENABLE_ASH_MAIL
#define MAXMBOXES 10
{
mail_var_path_changed++;
}
+
#endif /* ASH_MAIL */
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;
}
-/* ============ redir.c */
-
-/*
+/* ============ redir.c
+ *
* Code for dealing with input/output redirection.
*/
projects / platform / upstream / busybox.git / commitdiff