[unix-history] / usr / src / cmd / test.c

static char *sccsid = "@(#)test.c	4.1 (Berkeley) 10/1/80";
/*
 *	test expression
 *	[ expression ]
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#define EQ(a,b)	((tmp=a)==0?0:(strcmp(tmp,b)==0))

#define DIR 1
#define FIL 2
int	ap;
int	ac;
char	**av;
char	*tmp;

main(argc, argv)
char *argv[];
{

	ac = argc; av = argv; ap = 1;
	if(EQ(argv[0],"[")) {
		if(!EQ(argv[--ac],"]"))
			synbad("] missing","");
	}
	argv[ac] = 0;
	if (ac<=1) exit(1);
	exit(exp()?0:1);
}

char *nxtarg(mt) {

	if (ap>=ac) {
		if(mt) {
			ap++;
			return(0);
		}
		synbad("argument expected","");
	}
	return(av[ap++]);
}

exp() {
	int p1;

	p1 = e1();
	if (EQ(nxtarg(1), "-o")) return(p1 | exp());
	ap--;
	return(p1);
}

e1() {
	int p1;

	p1 = e2();
	if (EQ(nxtarg(1), "-a")) return (p1 & e1());
	ap--;
	return(p1);
}

e2() {
	if (EQ(nxtarg(0), "!"))
		return(!e3());
	ap--;
	return(e3());
}

e3() {
	int p1;
	register char *a;
	char *p2;
	int int1, int2;

	a=nxtarg(0);
	if(EQ(a, "(")) {
		p1 = exp();
		if(!EQ(nxtarg(0), ")")) synbad(") expected","");
		return(p1);
	}

	if(EQ(a, "-r"))
		return(tio(nxtarg(0), 0));

	if(EQ(a, "-w"))
		return(tio(nxtarg(0), 1));

	if(EQ(a, "-d"))
		return(ftype(nxtarg(0))==DIR);

	if(EQ(a, "-f"))
		return(ftype(nxtarg(0))==FIL);

	if(EQ(a, "-s"))
		return(fsizep(nxtarg(0)));

	if(EQ(a, "-t"))
		if(ap>=ac)
			return(isatty(1));
		else
			return(isatty(atoi(nxtarg(0))));

	if(EQ(a, "-n"))
		return(!EQ(nxtarg(0), ""));
	if(EQ(a, "-z"))
		return(EQ(nxtarg(0), ""));

	p2 = nxtarg(1);
	if (p2==0)
		return(!EQ(a,""));
	if(EQ(p2, "="))
		return(EQ(nxtarg(0), a));

	if(EQ(p2, "!="))
		return(!EQ(nxtarg(0), a));

	if(EQ(a, "-l")) {
		int1=length(p2);
		p2=nxtarg(0);
	} else{	int1=atoi(a);
	}
	int2 = atoi(nxtarg(0));
	if(EQ(p2, "-eq"))
		return(int1==int2);
	if(EQ(p2, "-ne"))
		return(int1!=int2);
	if(EQ(p2, "-gt"))
		return(int1>int2);
	if(EQ(p2, "-lt"))
		return(int1<int2);
	if(EQ(p2, "-ge"))
		return(int1>=int2);
	if(EQ(p2, "-le"))
		return(int1<=int2);

	synbad("unknown operator ",p2);
}

tio(a, f)
char *a;
int f;
{

	f = open(a, f);
	if (f>=0) {
		close(f);
		return(1);
	}
	return(0);
}

ftype(f)
char *f;
{
	struct stat statb;

	if(stat(f,&statb)<0)
		return(0);
	if((statb.st_mode&S_IFMT)==S_IFDIR)
		return(DIR);
	return(FIL);
}

fsizep(f)
char *f;
{
	struct stat statb;
	if(stat(f,&statb)<0)
		return(0);
	return(statb.st_size>0);
}

synbad(s1,s2)
char *s1, *s2;
{
	write(2, "test: ", 6);
	write(2, s1, strlen(s1));
	write(2, s2, strlen(s2));
	write(2, "\n", 1);
	exit(255);
}

length(s)
	char *s;
{
	char *es=s;
	while(*es++);
	return(es-s-1);
}
Commit	Line	Data
31cef89c	1	static char *sccsid = "@(#)test.c 4.1 (Berkeley) 10/1/80";
9c79dca0 BJ	2	/*
	3	* test expression
	4	* [ expression ]
	5	*/
	6
	7	#include <stdio.h>
	8	#include <sys/types.h>
	9	#include <sys/stat.h>
	10	#define EQ(a,b) ((tmp=a)==0?0:(strcmp(tmp,b)==0))
	11
	12	#define DIR 1
	13	#define FIL 2
	14	int ap;
	15	int ac;
	16	char **av;
	17	char *tmp;
	18
	19	main(argc, argv)
	20	char *argv[];
	21	{
	22
	23	ac = argc; av = argv; ap = 1;
	24	if(EQ(argv[0],"[")) {
	25	if(!EQ(argv[--ac],"]"))
	26	synbad("] missing","");
	27	}
	28	argv[ac] = 0;
	29	if (ac<=1) exit(1);
	30	exit(exp()?0:1);
	31	}
	32
	33	char *nxtarg(mt) {
	34
	35	if (ap>=ac) {
	36	if(mt) {
	37	ap++;
	38	return(0);
	39	}
	40	synbad("argument expected","");
	41	}
	42	return(av[ap++]);
	43	}
	44
	45	exp() {
	46	int p1;
	47
	48	p1 = e1();
	49	if (EQ(nxtarg(1), "-o")) return(p1 \| exp());
	50	ap--;
	51	return(p1);
	52	}
	53
	54	e1() {
	55	int p1;
	56
	57	p1 = e2();
	58	if (EQ(nxtarg(1), "-a")) return (p1 & e1());
	59	ap--;
	60	return(p1);
	61	}
	62
	63	e2() {
	64	if (EQ(nxtarg(0), "!"))
	65	return(!e3());
66	ap--;
67	return(e3());
68	}
69
70	e3() {
71	int p1;
72	register char *a;
73	char *p2;
74	int int1, int2;
75
76	a=nxtarg(0);
77	if(EQ(a, "(")) {
78	p1 = exp();
79	if(!EQ(nxtarg(0), ")")) synbad(") expected","");
80	return(p1);
81	}
82
83	if(EQ(a, "-r"))
84	return(tio(nxtarg(0), 0));
85
86	if(EQ(a, "-w"))
87	return(tio(nxtarg(0), 1));
88
89	if(EQ(a, "-d"))
90	return(ftype(nxtarg(0))==DIR);
91
92	if(EQ(a, "-f"))
93	return(ftype(nxtarg(0))==FIL);
94
95	if(EQ(a, "-s"))
96	return(fsizep(nxtarg(0)));
97
98	if(EQ(a, "-t"))
99	if(ap>=ac)
100	return(isatty(1));
101	else
102	return(isatty(atoi(nxtarg(0))));
103
104	if(EQ(a, "-n"))
105	return(!EQ(nxtarg(0), ""));
106	if(EQ(a, "-z"))
107	return(EQ(nxtarg(0), ""));
108
109	p2 = nxtarg(1);
110	if (p2==0)
111	return(!EQ(a,""));
112	if(EQ(p2, "="))
113	return(EQ(nxtarg(0), a));
114
115	if(EQ(p2, "!="))
116	return(!EQ(nxtarg(0), a));
117
118	if(EQ(a, "-l")) {
119	int1=length(p2);
120	p2=nxtarg(0);
121	} else{ int1=atoi(a);
122	}
123	int2 = atoi(nxtarg(0));
124	if(EQ(p2, "-eq"))
125	return(int1==int2);
126	if(EQ(p2, "-ne"))
127	return(int1!=int2);
128	if(EQ(p2, "-gt"))
129	return(int1>int2);
130	if(EQ(p2, "-lt"))
131	return(int1<int2);
132	if(EQ(p2, "-ge"))
133	return(int1>=int2);
134	if(EQ(p2, "-le"))
135	return(int1<=int2);
136
137	synbad("unknown operator ",p2);
138	}
139
140	tio(a, f)
141	char *a;
142	int f;
143	{
144
145	f = open(a, f);
146	if (f>=0) {
147	close(f);
148	return(1);
149	}
150	return(0);
151	}
152
153	ftype(f)
154	char *f;
155	{
156	struct stat statb;
157
158	if(stat(f,&statb)<0)
159	return(0);
160	if((statb.st_mode&S_IFMT)==S_IFDIR)
161	return(DIR);
162	return(FIL);
163	}
164
165	fsizep(f)
166	char *f;
167	{
168	struct stat statb;
169	if(stat(f,&statb)<0)
170	return(0);
171	return(statb.st_size>0);
172	}
173
174	synbad(s1,s2)
175	char s1, s2;
176	{
177	write(2, "test: ", 6);
178	write(2, s1, strlen(s1));
179	write(2, s2, strlen(s2));
180	write(2, "\n", 1);
181	exit(255);
182	}
183
184	length(s)
185	char *s;
186	{
187	char *es=s;
188	while(*es++);
189	return(es-s-1);
190	}