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Fix various cases with 3 or 4 parameters in test(1) to be POSIX compliant.
More precisely, this gives precedence to an interpretation not using the '(', ')', '-a' and '-o' in their special meaning, if possible. For example, it is now safe to write [ "$a" = "$b" ] and assume it compares the two strings. The man page already says that test(1) works this way, so does not need to be changed. Interpretation of input with more parameters tries a bit harder to find a valid parse in some cases. Add various additional test cases to TEST.sh. PR: standards/133369 Approved by: ed (mentor)
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=192862
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@ -133,5 +133,45 @@ t 0 '"a" -a ! ""'
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t 1 '""'
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t 0 '! ""'
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t 0 '!'
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t 0 '\('
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t 0 '\)'
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t 1 '\( = \)'
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t 0 '\( != \)'
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t 0 '\( ! \)'
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t 0 '\( \( \)'
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t 0 '\( \) \)'
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t 0 '! = !'
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t 1 '! != !'
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t 1 '-n = \)'
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t 0 '! != \)'
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t 1 '! = a'
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t 0 '! != -n'
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t 0 '! -c /etc/passwd'
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t 0 '! \( = \)'
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t 1 '! \( != \)'
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t 1 '! = = ='
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t 0 '! = = \)'
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t 0 '! "" -o ""'
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t 1 '! "x" -o ""'
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t 1 '! "" -o "x"'
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t 1 '! "x" -o "x"'
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t 0 '\( -f /etc/passwd \)'
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t 1 '\( ! = \)'
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t 0 '\( ! "" \)'
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t 1 '\( ! -e \)'
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t 0 '0 -eq 0 -a -d /'
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t 0 '-s = "" -o "" = ""'
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t 0 '"" = "" -o -s = ""'
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t 1 '-s = "" -o -s = ""'
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t 0 '-z x -o x = "#" -o x = x'
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t 1 '-z y -o y = "#" -o y = x'
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t 0 '0 -ne 0 -o ! -f /'
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t 0 '1 -ne 0 -o ! -f /etc/passwd'
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t 1 '0 -ne 0 -o ! -f /etc/passwd'
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echo ""
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echo "Syntax errors: $ERROR Failed: $FAILED"
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@ -163,6 +163,7 @@ struct t_op {
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struct t_op const *t_wp_op;
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int nargc;
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char **t_wp;
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int parenlevel;
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static int aexpr(enum token);
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static int binop(void);
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@ -171,7 +172,9 @@ static int filstat(char *, enum token);
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static int getn(const char *);
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static intmax_t getq(const char *);
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static int intcmp(const char *, const char *);
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static int isoperand(void);
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static int isunopoperand(void);
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static int islparenoperand(void);
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static int isrparenoperand(void);
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static int newerf(const char *, const char *);
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static int nexpr(enum token);
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static int oexpr(enum token);
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@ -205,7 +208,14 @@ main(int argc, char **argv)
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#endif
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nargc = argc;
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t_wp = &argv[1];
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res = !oexpr(t_lex(*t_wp));
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parenlevel = 0;
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if (nargc == 4 && strcmp(*t_wp, "!") == 0) {
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/* Things like ! "" -o x do not fit in the normal grammar. */
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--nargc;
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++t_wp;
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res = oexpr(t_lex(*t_wp));
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} else
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res = !oexpr(t_lex(*t_wp));
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if (--nargc > 0)
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syntax(*t_wp, "unexpected operator");
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@ -268,12 +278,16 @@ primary(enum token n)
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if (n == EOI)
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return 0; /* missing expression */
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if (n == LPAREN) {
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parenlevel++;
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if ((nn = t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) ==
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RPAREN)
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RPAREN) {
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parenlevel--;
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return 0; /* missing expression */
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}
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res = oexpr(nn);
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if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) != RPAREN)
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syntax(NULL, "closing paren expected");
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parenlevel--;
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return res;
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}
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if (t_wp_op && t_wp_op->op_type == UNOP) {
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@ -410,8 +424,10 @@ t_lex(char *s)
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}
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while (op->op_text) {
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if (strcmp(s, op->op_text) == 0) {
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if ((op->op_type == UNOP && isoperand()) ||
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(op->op_num == LPAREN && nargc == 1))
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if (((op->op_type == UNOP || op->op_type == BUNOP)
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&& isunopoperand()) ||
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(op->op_num == LPAREN && islparenoperand()) ||
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(op->op_num == RPAREN && isrparenoperand()))
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break;
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t_wp_op = op;
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return op->op_num;
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@ -423,7 +439,7 @@ t_lex(char *s)
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}
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static int
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isoperand(void)
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isunopoperand(void)
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{
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struct t_op const *op = ops;
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char *s;
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@ -431,19 +447,53 @@ isoperand(void)
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if (nargc == 1)
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return 1;
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if (nargc == 2)
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return 0;
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s = *(t_wp + 1);
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if (nargc == 2)
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return parenlevel == 1 && strcmp(s, ")") == 0;
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t = *(t_wp + 2);
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while (op->op_text) {
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if (strcmp(s, op->op_text) == 0)
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return op->op_type == BINOP &&
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(t[0] != ')' || t[1] != '\0');
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(parenlevel == 0 || t[0] != ')' || t[1] != '\0');
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op++;
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}
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return 0;
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}
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static int
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islparenoperand(void)
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{
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struct t_op const *op = ops;
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char *s;
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if (nargc == 1)
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return 1;
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s = *(t_wp + 1);
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if (nargc == 2)
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return parenlevel == 1 && strcmp(s, ")") == 0;
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if (nargc != 3)
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return 0;
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while (op->op_text) {
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if (strcmp(s, op->op_text) == 0)
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return op->op_type == BINOP;
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op++;
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}
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return 0;
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}
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static int
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isrparenoperand(void)
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{
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char *s;
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if (nargc == 1)
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return 0;
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s = *(t_wp + 1);
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if (nargc == 2)
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return parenlevel == 1 && strcmp(s, ")") == 0;
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return 0;
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}
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/* atoi with error detection */
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static int
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getn(const char *s)
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