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ash: support &> redirection (bashism). ~90 bytes of code
This commit is contained in:
Denis Vlasenko
parent
176d49d4f7
commit
834dee785d
117
shell/ash.c
117
shell/ash.c
@ -2572,34 +2572,36 @@ pwdcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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/* ============ ... */
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#define IBUFSIZ COMMON_BUFSIZE
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#define basebuf bb_common_bufsiz1 /* buffer for top level input file */
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/* buffer for top level input file */
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#define basebuf bb_common_bufsiz1
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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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#define CBACK 2 /* a backslash character */
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#define CSQUOTE 3 /* single quote */
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#define CDQUOTE 4 /* double quote */
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#define CWORD 0 /* character is nothing special */
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#define CNL 1 /* newline character */
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#define CBACK 2 /* a backslash character */
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#define CSQUOTE 3 /* single quote */
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#define CDQUOTE 4 /* double quote */
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#define CENDQUOTE 5 /* a terminating quote */
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#define CBQUOTE 6 /* backwards single quote */
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#define CVAR 7 /* a dollar sign */
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#define CENDVAR 8 /* a '}' character */
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#define CLP 9 /* a left paren in arithmetic */
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#define CRP 10 /* a right paren in arithmetic */
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#define CBQUOTE 6 /* backwards single quote */
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#define CVAR 7 /* a dollar sign */
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#define CENDVAR 8 /* a '}' character */
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#define CLP 9 /* a left paren in arithmetic */
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#define CRP 10 /* a right paren in arithmetic */
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#define CENDFILE 11 /* end of file */
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#define CCTL 12 /* like CWORD, except it must be escaped */
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#define CSPCL 13 /* these terminate a word */
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#define CIGN 14 /* character should be ignored */
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#define CCTL 12 /* like CWORD, except it must be escaped */
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#define CSPCL 13 /* these terminate a word */
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#define CIGN 14 /* character should be ignored */
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#if ENABLE_ASH_ALIAS
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#define SYNBASE 130
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#define PEOF -130
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#define PEOA -129
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#define SYNBASE 130
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#define PEOF -130
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#define PEOA -129
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#define PEOA_OR_PEOF PEOA
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#else
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#define SYNBASE 129
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#define PEOF -129
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#define SYNBASE 129
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#define PEOF -129
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#define PEOA_OR_PEOF PEOF
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#endif
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@ -9269,7 +9271,7 @@ preadbuffer(void)
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return signed_char2int(*parsenextc++);
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}
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#define pgetc_as_macro() (--parsenleft >= 0? signed_char2int(*parsenextc++) : preadbuffer())
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#define pgetc_as_macro() (--parsenleft >= 0 ? signed_char2int(*parsenextc++) : preadbuffer())
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static int
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pgetc(void)
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{
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@ -9277,9 +9279,9 @@ pgetc(void)
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}
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#if ENABLE_ASH_OPTIMIZE_FOR_SIZE
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#define pgetc_macro() pgetc()
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#define pgetc_fast() pgetc()
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#else
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#define pgetc_macro() pgetc_as_macro()
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#define pgetc_fast() pgetc_as_macro()
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#endif
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/*
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@ -9290,18 +9292,13 @@ static int
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pgetc2(void)
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{
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int c;
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do {
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c = pgetc_macro();
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c = pgetc_fast();
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} while (c == PEOA);
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return c;
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}
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#else
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static int
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pgetc2(void)
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{
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return pgetc_macro();
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}
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#define pgetc2() pgetc()
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#endif
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/*
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@ -9355,7 +9352,6 @@ pushstring(char *s, struct alias *ap)
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len = strlen(s);
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INT_OFF;
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/*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
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if (g_parsefile->strpush) {
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sp = ckzalloc(sizeof(struct strpush));
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sp->prev = g_parsefile->strpush;
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@ -10800,15 +10796,23 @@ readtoken1(int firstc, int syntax, char *eofmark, int striptabs)
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case CIGN:
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break;
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default:
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if (varnest == 0)
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if (varnest == 0) {
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#if ENABLE_ASH_BASH_COMPAT
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if (c == '&') {
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if (pgetc() == '>')
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c = 0x100 + '>'; /* flag &> */
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pungetc();
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}
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#endif
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goto endword; /* exit outer loop */
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}
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#if ENABLE_ASH_ALIAS
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if (c != PEOA)
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#endif
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USTPUTC(c, out);
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}
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c = pgetc_macro();
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c = pgetc_fast();
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} /* for (;;) */
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}
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endword:
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@ -10827,7 +10831,9 @@ readtoken1(int firstc, int syntax, char *eofmark, int striptabs)
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len = out - (char *)stackblock();
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out = stackblock();
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if (eofmark == NULL) {
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if ((c == '>' || c == '<') && quotef == 0) {
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if ((c == '>' || c == '<' USE_ASH_BASH_COMPAT( || c == 0x100 + '>'))
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&& quotef == 0
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) {
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if (isdigit_str9(out)) {
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PARSEREDIR(); /* passed as params: out, c */
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lasttoken = TREDIR;
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@ -10908,7 +10914,15 @@ parseredir: {
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np->type = NTO;
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pungetc();
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}
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} else { /* c == '<' */
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}
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#if ENABLE_ASH_BASH_COMPAT
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else if (c == 0x100 + '>') { /* this flags &> redirection */
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np->nfile.fd = 1;
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pgetc(); /* this is '>', no need to check */
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np->type = NTO2;
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}
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#endif
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else { /* c == '<' */
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/*np->nfile.fd = 0; - stzalloc did it */
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c = pgetc();
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switch (c) {
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@ -11281,9 +11295,14 @@ parsearith: {
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#ifdef NEW_xxreadtoken
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/* singles must be first! */
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static const char xxreadtoken_chars[7] ALIGN1 = {
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'\n', '(', ')', '&', '|', ';', 0
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'\n', '(', ')', /* singles */
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'&', '|', ';', /* doubles */
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0
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};
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#define xxreadtoken_singles 3
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#define xxreadtoken_doubles 3
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static const char xxreadtoken_tokens[] ALIGN1 = {
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TNL, TLP, TRP, /* only single occurrence allowed */
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TBACKGND, TPIPE, TSEMI, /* if single occurrence */
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@ -11291,11 +11310,6 @@ static const char xxreadtoken_tokens[] ALIGN1 = {
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TAND, TOR, TENDCASE /* if double occurrence */
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};
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#define xxreadtoken_doubles \
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(sizeof(xxreadtoken_tokens) - sizeof(xxreadtoken_chars))
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#define xxreadtoken_singles \
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(sizeof(xxreadtoken_chars) - xxreadtoken_doubles - 1)
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static int
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xxreadtoken(void)
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{
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@ -11310,7 +11324,7 @@ xxreadtoken(void)
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}
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startlinno = plinno;
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for (;;) { /* until token or start of word found */
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c = pgetc_macro();
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c = pgetc_fast();
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if (c == ' ' || c == '\t' USE_ASH_ALIAS( || c == PEOA))
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continue;
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@ -11321,7 +11335,7 @@ xxreadtoken(void)
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} else if (c == '\\') {
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if (pgetc() != '\n') {
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pungetc();
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goto READTOKEN1;
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break; /* return readtoken1(...) */
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}
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startlinno = ++plinno;
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if (doprompt)
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@ -11337,16 +11351,19 @@ xxreadtoken(void)
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}
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p = strchr(xxreadtoken_chars, c);
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if (p == NULL) {
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READTOKEN1:
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return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
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}
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if (p == NULL)
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break; /* return readtoken1(...) */
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if ((size_t)(p - xxreadtoken_chars) >= xxreadtoken_singles) {
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if (pgetc() == *p) { /* double occurrence? */
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if ((int)(p - xxreadtoken_chars) >= xxreadtoken_singles) {
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int cc = pgetc();
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if (cc == c) { /* double occurrence? */
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p += xxreadtoken_doubles + 1;
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} else {
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pungetc();
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#if ENABLE_ASH_BASH_COMPAT
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if (c == '&' && cc == '>') /* &> */
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break; /* return readtoken1(...) */
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#endif
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}
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}
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}
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@ -11354,6 +11371,8 @@ xxreadtoken(void)
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return lasttoken;
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}
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} /* for (;;) */
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return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
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}
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#else /* old xxreadtoken */
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#define RETURN(token) return lasttoken = token
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@ -11371,7 +11390,7 @@ xxreadtoken(void)
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}
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startlinno = plinno;
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for (;;) { /* until token or start of word found */
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c = pgetc_macro();
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c = pgetc_fast();
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switch (c) {
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case ' ': case '\t':
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#if ENABLE_ASH_ALIAS
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