mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 04:28:57 +00:00
msh: a few fields renamed; short->int conversion for a field
holding file descriptors; short->smalling for flag field synio 263 264 +1 readc 247 242 -5 forkexec 1339 1307 -32 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/2 up/down: 1/-37) Total: -36 bytes
This commit is contained in:
Denis Vlasenko
parent
d18f52bd18
commit
4aafd5f4e3
119
shell/msh.c
119
shell/msh.c
@ -173,8 +173,8 @@ typedef void xint; /* base type of jmp_buf, for not broken
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* redirection
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*/
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struct ioword {
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short io_unit; /* unit affected */
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short io_flag; /* action (below) */
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smallint io_flag; /* action (below) */
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int io_fd; /* fd affected */
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char *io_name; /* file name */
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};
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@ -186,7 +186,7 @@ struct ioword {
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#define IODUP 32 /* >&digit */
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#define IOCLOSE 64 /* >&- */
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#define IODEFAULT (-1) /* token for default IO unit */
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#define IODEFAULT (-1) /* "default" IO fd */
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/*
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@ -194,7 +194,7 @@ struct ioword {
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* Might eventually use a union.
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*/
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struct op {
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smallint type; /* operation type, see Txxxx below */
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smallint op_type; /* operation type, see Txxxx below */
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char **op_words; /* arguments to a command */
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struct ioword **ioact; /* IO actions (eg, < > >>) */
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struct op *left;
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@ -1302,7 +1302,7 @@ struct op *scantree(struct op *head)
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DBGPRINTF5(("SCANTREE: checking node %p\n", head));
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if ((head->type != TDOT) && LONE_CHAR(head->op_words[0], '.')) {
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if ((head->op_type != TDOT) && LONE_CHAR(head->op_words[0], '.')) {
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DBGPRINTF5(("SCANTREE: dot found in node %p\n", head));
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return head;
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}
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@ -1325,9 +1325,9 @@ static void onecommand(void)
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freehere(areanum);
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freearea(areanum);
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garbage();
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wdlist = 0;
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iolist = 0;
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global_env.errpt = 0;
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wdlist = NULL;
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iolist = NULL;
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global_env.errpt = NULL;
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global_env.linep = line;
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yynerrs = 0;
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multiline = 0;
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@ -1593,7 +1593,7 @@ static struct op *pipeline(int cf)
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zzerr();
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}
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if (t->type != TPAREN && t->type != TCOM) {
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if (t->op_type != TPAREN && t->op_type != TCOM) {
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/* shell statement */
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t = block(TPAREN, t, NOBLOCK, NOWORDS);
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}
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@ -1627,7 +1627,7 @@ static struct op *andor(void)
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}
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t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS);
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} /* WHILE */
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}
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peeksym = c;
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}
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@ -1723,7 +1723,7 @@ static struct op *simple(void)
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case WORD:
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if (t == NULL) {
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t = newtp();
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t->type = TCOM;
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t->op_type = TCOM;
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}
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peeksym = 0;
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word(yylval.cp);
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@ -1775,7 +1775,7 @@ static struct op *command(int cf)
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if (iolist == NULL)
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return NULL;
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t = newtp();
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t->type = TCOM;
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t->op_type = TCOM;
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}
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break;
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@ -1789,7 +1789,7 @@ static struct op *command(int cf)
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case FOR:
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t = newtp();
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t->type = TFOR;
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t->op_type = TFOR;
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musthave(WORD, 0);
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startl = 1;
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t->str = yylval.cp;
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@ -1806,7 +1806,7 @@ static struct op *command(int cf)
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case UNTIL:
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multiline++;
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t = newtp();
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t->type = (c == WHILE ? TWHILE : TUNTIL);
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t->op_type = (c == WHILE ? TWHILE : TUNTIL);
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t->left = c_list();
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t->right = dogroup(1);
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/* t->op_words = NULL; - newtp() did this */
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@ -1815,7 +1815,7 @@ static struct op *command(int cf)
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case CASE:
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t = newtp();
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t->type = TCASE;
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t->op_type = TCASE;
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musthave(WORD, 0);
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t->str = yylval.cp;
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startl++;
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@ -1832,7 +1832,7 @@ static struct op *command(int cf)
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case IF:
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multiline++;
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t = newtp();
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t->type = TIF;
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t->op_type = TIF;
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t->left = c_list();
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t->right = thenpart();
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musthave(FI, 0);
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@ -1841,7 +1841,7 @@ static struct op *command(int cf)
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case DOT:
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t = newtp();
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t->type = TDOT;
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t->op_type = TDOT;
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musthave(WORD, 0); /* gets name of file */
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DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp));
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@ -1904,7 +1904,7 @@ static struct op *thenpart(void)
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return NULL;
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}
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t = newtp();
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/*t->type = 0; - newtp() did this */
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/*t->op_type = 0; - newtp() did this */
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t->left = c_list();
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if (t->left == NULL)
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zzerr();
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@ -1926,7 +1926,7 @@ static struct op *elsepart(void)
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case ELIF:
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t = newtp();
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t->type = TELIF;
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t->op_type = TELIF;
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t->left = c_list();
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t->right = thenpart();
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return t;
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@ -1958,7 +1958,7 @@ static struct op *casepart(void)
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DBGPRINTF7(("CASEPART: enter...\n"));
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t = newtp();
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t->type = TPAT;
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t->op_type = TPAT;
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t->op_words = pattern();
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musthave(')', 0);
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t->left = c_list();
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@ -2027,7 +2027,7 @@ static struct op *block(int type, struct op *t1, struct op *t2, char **wp)
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DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type]));
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t = newtp();
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t->type = type;
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t->op_type = type;
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t->left = t1;
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t->right = t2;
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t->op_words = wp;
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@ -2096,7 +2096,7 @@ static struct op *newtp(void)
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static struct op *namelist(struct op *t)
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{
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DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t,
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T_CMD_NAMES[t->type], iolist));
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T_CMD_NAMES[t->op_type], iolist));
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if (iolist) {
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iolist = addword((char *) NULL, iolist);
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@ -2104,8 +2104,8 @@ static struct op *namelist(struct op *t)
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} else
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t->ioact = NULL;
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if (t->type != TCOM) {
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if (t->type != TPAREN && t->ioact != NULL) {
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if (t->op_type != TCOM) {
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if (t->op_type != TPAREN && t->ioact != NULL) {
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t = block(TPAREN, t, NOBLOCK, NOWORDS);
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t->ioact = t->left->ioact;
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t->left->ioact = NULL;
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@ -2124,7 +2124,7 @@ static char **copyw(void)
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char **wd;
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wd = getwords(wdlist);
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wdlist = 0;
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wdlist = NULL;
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return wd;
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}
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@ -2138,7 +2138,7 @@ static struct ioword **copyio(void)
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struct ioword **iop;
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iop = (struct ioword **) getwords(iolist);
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iolist = 0;
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iolist = NULL;
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return iop;
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}
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@ -2147,7 +2147,7 @@ static struct ioword *io(int u, int f, char *cp)
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struct ioword *iop;
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iop = (struct ioword *) tree(sizeof(*iop));
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iop->io_unit = u;
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iop->io_fd = u;
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iop->io_flag = f;
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iop->io_name = cp;
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iolist = addword((char *) iop, iolist);
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@ -2194,7 +2194,7 @@ static int yylex(int cf)
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}
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break;
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case '#': /* Comment, skip to next newline or End-of-string */
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case '#': /* Comment, skip to next newline or End-of-string */
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while ((c = my_getc(0)) != '\0' && c != '\n')
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continue;
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unget(c);
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@ -2400,10 +2400,10 @@ static struct op **find1case(struct op *t, const char *w)
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return NULL;
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}
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DBGPRINTF3(("FIND1CASE: enter, t->type=%d (%s)\n", t->type,
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T_CMD_NAMES[t->type]));
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DBGPRINTF3(("FIND1CASE: enter, t->op_type=%d (%s)\n", t->op_type,
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T_CMD_NAMES[t->op_type]));
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if (t->type == TLIST) {
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if (t->op_type == TLIST) {
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tp = find1case(t->left, w);
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if (tp != NULL) {
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DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp));
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@ -2458,18 +2458,18 @@ static int execute(struct op *t, int *pin, int *pout, int no_fork)
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return 0;
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}
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DBGPRINTF(("EXECUTE: t=%p, t->type=%d (%s), t->op_words is %s\n", t,
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t->type, T_CMD_NAMES[t->type],
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DBGPRINTF(("EXECUTE: t=%p, t->op_type=%d (%s), t->op_words is %s\n", t,
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t->op_type, T_CMD_NAMES[t->op_type],
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((t->op_words == NULL) ? "NULL" : t->op_words[0])));
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rv = 0;
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a = areanum++;
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wp2 = t->op_words;
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wp = (wp2 != NULL)
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? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
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? eval(wp2, t->op_type == TCOM ? DOALL : DOALL & ~DOKEY)
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: NULL;
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switch (t->type) {
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switch (t->op_type) {
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case TDOT:
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DBGPRINTF3(("EXECUTE: TDOT\n"));
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@ -2552,7 +2552,7 @@ static int execute(struct op *t, int *pin, int *pout, int no_fork)
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case TAND:
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rv = execute(t->left, pin, pout, /* no_fork: */ 0);
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t1 = t->right;
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if (t1 != NULL && (rv == 0) == (t->type == TAND))
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if (t1 != NULL && (rv == 0) == (t->op_type == TAND))
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rv = execute(t1, pin, pout, /* no_fork: */ 0);
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break;
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@ -2586,7 +2586,7 @@ static int execute(struct op *t, int *pin, int *pout, int no_fork)
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goto broken;
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brkset(&bc);
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t1 = t->left;
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while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->type == TWHILE))
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while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->op_type == TWHILE))
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rv = execute(t->right, pin, pout, /* no_fork: */ 0);
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brklist = brklist->nextlev;
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break;
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@ -2707,7 +2707,7 @@ static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp)
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((t->op_words == NULL) ? "NULL" : t->op_words[0])));
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owp = wp;
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resetsig = 0;
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if (t->type == TCOM) {
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if (t->op_type == TCOM) {
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while (*wp++ != NULL)
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continue;
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cp = *wp;
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@ -2851,7 +2851,7 @@ static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp)
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signal(SIGQUIT, SIG_DFL);
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}
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if (t->type == TPAREN)
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if (t->op_type == TPAREN)
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_exit(execute(t->left, NOPIPE, NOPIPE, /* no_fork: */ 1));
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if (wp[0] == NULL)
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_exit(0);
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@ -2883,13 +2883,13 @@ static int iosetup(struct ioword *iop, int pipein, int pipeout)
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DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop,
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pipein, pipeout));
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if (iop->io_unit == IODEFAULT) /* take default */
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iop->io_unit = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1;
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if (iop->io_fd == IODEFAULT) /* take default */
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iop->io_fd = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1;
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if (pipein && iop->io_unit == 0)
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if (pipein && iop->io_fd == 0)
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return 0;
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if (pipeout && iop->io_unit == 1)
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if (pipeout && iop->io_fd == 1)
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return 0;
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msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create";
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@ -2935,11 +2935,11 @@ static int iosetup(struct ioword *iop, int pipein, int pipeout)
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break;
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case IODUP:
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u = dup2(*cp - '0', iop->io_unit);
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u = dup2(*cp - '0', iop->io_fd);
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break;
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case IOCLOSE:
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close(iop->io_unit);
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close(iop->io_fd);
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return 0;
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}
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@ -2949,10 +2949,7 @@ static int iosetup(struct ioword *iop, int pipein, int pipeout)
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warn(msg);
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return 1;
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}
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if (u != iop->io_unit) {
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dup2(u, iop->io_unit);
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close(u);
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}
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xmove_fd(u, iop->io_fd);
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return 0;
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}
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@ -3130,8 +3127,8 @@ static int run(struct ioarg *argp, int (*f) (struct ioarg *))
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errpt = ev;
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if (newenv(setjmp(errpt)) == 0) {
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wdlist = 0;
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iolist = 0;
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wdlist = NULL;
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iolist = NULL;
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pushio(argp, f);
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global_env.iobase = global_env.iop;
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yynerrs = 0;
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@ -4486,7 +4483,7 @@ static int readc(void)
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if (global_env.iop == iostack)
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ioecho(c);
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global_env.iop->prev = c;
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return global_env.iop->prev;
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return c;
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}
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if (global_env.iop->task == XIO && global_env.iop->prev != '\n') {
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global_env.iop->prev = 0;
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@ -4498,7 +4495,7 @@ static int readc(void)
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if (global_env.iop->task == XIO) {
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if (multiline) {
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global_env.iop->prev = 0;
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return global_env.iop->prev;
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return 0;
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}
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if (interactive && global_env.iop == iostack + 1) {
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#if ENABLE_FEATURE_EDITING
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@ -4584,7 +4581,7 @@ static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *))
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if (fn == filechar || fn == linechar)
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global_env.iop->task = XIO;
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else if (fn == (int (*)(struct ioarg *)) gravechar
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|| fn == (int (*)(struct ioarg *)) qgravechar)
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|| fn == (int (*)(struct ioarg *)) qgravechar)
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global_env.iop->task = XGRAVE;
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else
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global_env.iop->task = XOTHER;
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@ -4604,16 +4601,16 @@ static struct io *setbase(struct io *ip)
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*/
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/*
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* Produce the characters of a string, then a newline, then EOF.
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* Produce the characters of a string, then a newline, then NUL.
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*/
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static int nlchar(struct ioarg *ap)
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{
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int c;
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char c;
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if (ap->aword == NULL)
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return 0;
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return '\0';
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c = *ap->aword++;
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if (c == 0) {
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if (c == '\0') {
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ap->aword = NULL;
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return '\n';
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}
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@ -5057,7 +5054,7 @@ static void freehere(int area)
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DBGPRINTF6(("FREEHERE: enter, area=%d\n", area));
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hl = NULL;
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for (h = acthere; h != NULL; h = h->h_next)
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for (h = acthere; h != NULL; h = h->h_next) {
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if (getarea((char *) h) >= area) {
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if (h->h_iop->io_name != NULL)
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unlink(h->h_iop->io_name);
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@ -5065,8 +5062,10 @@ static void freehere(int area)
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acthere = h->h_next;
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else
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hl->h_next = h->h_next;
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} else
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} else {
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hl = h;
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}
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}
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}
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