2 bc7cb1a1 2003-11-23 devnull * POSIX standard
3 bc7cb1a1 2003-11-23 devnull * test expression
4 bc7cb1a1 2003-11-23 devnull * [ expression ]
6 bc7cb1a1 2003-11-23 devnull * Plan 9 additions:
7 bc7cb1a1 2003-11-23 devnull * -A file exists and is append-only
8 bc7cb1a1 2003-11-23 devnull * -L file exists and is exclusive-use
11 bc7cb1a1 2003-11-23 devnull #include <u.h>
12 bc7cb1a1 2003-11-23 devnull #include <libc.h>
13 bc7cb1a1 2003-11-23 devnull #define EQ(a,b) ((tmp=a)==0?0:(strcmp(tmp,b)==0))
15 d49a2e48 2004-03-09 devnull extern int isatty(int); /* <unistd.h> */
19 bc7cb1a1 2003-11-23 devnull char **av;
20 bc7cb1a1 2003-11-23 devnull char *tmp;
22 bc7cb1a1 2003-11-23 devnull void synbad(char *, char *);
23 bc7cb1a1 2003-11-23 devnull int fsizep(char *);
24 bc7cb1a1 2003-11-23 devnull int isdir(char *);
25 bc7cb1a1 2003-11-23 devnull int isreg(char *);
26 bc7cb1a1 2003-11-23 devnull int isint(char *, int *);
27 bc7cb1a1 2003-11-23 devnull int hasmode(char *, ulong);
28 bc7cb1a1 2003-11-23 devnull int tio(char *, int);
29 bc7cb1a1 2003-11-23 devnull int e(void), e1(void), e2(void), e3(void);
32 bc7cb1a1 2003-11-23 devnull main(int argc, char *argv[])
35 bc7cb1a1 2003-11-23 devnull ac = argc; av = argv; ap = 1;
36 bc7cb1a1 2003-11-23 devnull if(EQ(argv[0],"[")) {
37 bc7cb1a1 2003-11-23 devnull if(!EQ(argv[--ac],"]"))
38 bc7cb1a1 2003-11-23 devnull synbad("] missing","");
40 bc7cb1a1 2003-11-23 devnull argv[ac] = 0;
41 bc7cb1a1 2003-11-23 devnull if (ac<=1) exits("usage");
42 bc7cb1a1 2003-11-23 devnull exits(e()?0:"false");
46 bc7cb1a1 2003-11-23 devnull nxtarg(int mt)
48 bc7cb1a1 2003-11-23 devnull if(ap>=ac){
51 bc7cb1a1 2003-11-23 devnull return(0);
53 bc7cb1a1 2003-11-23 devnull synbad("argument expected","");
55 bc7cb1a1 2003-11-23 devnull return(av[ap++]);
59 bc7cb1a1 2003-11-23 devnull nxtintarg(int *pans)
61 bc7cb1a1 2003-11-23 devnull if(ap<ac && isint(av[ap], pans)){
63 bc7cb1a1 2003-11-23 devnull return 1;
65 bc7cb1a1 2003-11-23 devnull return 0;
69 bc7cb1a1 2003-11-23 devnull e(void) {
72 bc7cb1a1 2003-11-23 devnull p1 = e1();
73 bc7cb1a1 2003-11-23 devnull if (EQ(nxtarg(1), "-o")) return(p1 || e());
75 bc7cb1a1 2003-11-23 devnull return(p1);
79 bc7cb1a1 2003-11-23 devnull e1(void) {
82 bc7cb1a1 2003-11-23 devnull p1 = e2();
83 bc7cb1a1 2003-11-23 devnull if (EQ(nxtarg(1), "-a")) return (p1 && e1());
85 bc7cb1a1 2003-11-23 devnull return(p1);
89 bc7cb1a1 2003-11-23 devnull e2(void) {
90 bc7cb1a1 2003-11-23 devnull if (EQ(nxtarg(0), "!"))
91 bc7cb1a1 2003-11-23 devnull return(!e2());
93 bc7cb1a1 2003-11-23 devnull return(e3());
97 bc7cb1a1 2003-11-23 devnull e3(void) {
100 bc7cb1a1 2003-11-23 devnull char *p2;
101 bc7cb1a1 2003-11-23 devnull int int1, int2;
103 bc7cb1a1 2003-11-23 devnull a = nxtarg(0);
104 bc7cb1a1 2003-11-23 devnull if(EQ(a, "(")) {
105 bc7cb1a1 2003-11-23 devnull p1 = e();
106 bc7cb1a1 2003-11-23 devnull if(!EQ(nxtarg(0), ")")) synbad(") expected","");
107 bc7cb1a1 2003-11-23 devnull return(p1);
110 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-A"))
111 bc7cb1a1 2003-11-23 devnull return(hasmode(nxtarg(0), DMAPPEND));
113 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-L"))
114 bc7cb1a1 2003-11-23 devnull return(hasmode(nxtarg(0), DMEXCL));
116 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-f"))
117 bc7cb1a1 2003-11-23 devnull return(isreg(nxtarg(0)));
119 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-d"))
120 bc7cb1a1 2003-11-23 devnull return(isdir(nxtarg(0)));
122 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-r"))
123 bc7cb1a1 2003-11-23 devnull return(tio(nxtarg(0), 4));
125 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-w"))
126 bc7cb1a1 2003-11-23 devnull return(tio(nxtarg(0), 2));
128 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-x"))
129 bc7cb1a1 2003-11-23 devnull return(tio(nxtarg(0), 1));
131 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-e"))
132 bc7cb1a1 2003-11-23 devnull return(tio(nxtarg(0), 0));
134 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-c"))
135 bc7cb1a1 2003-11-23 devnull return(0);
137 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-b"))
138 bc7cb1a1 2003-11-23 devnull return(0);
140 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-u"))
141 bc7cb1a1 2003-11-23 devnull return(0);
143 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-g"))
144 bc7cb1a1 2003-11-23 devnull return(0);
146 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-s"))
147 bc7cb1a1 2003-11-23 devnull return(fsizep(nxtarg(0)));
149 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-t"))
150 bc7cb1a1 2003-11-23 devnull if(ap>=ac || !nxtintarg(&int1))
151 bc7cb1a1 2003-11-23 devnull return(isatty(1));
153 bc7cb1a1 2003-11-23 devnull return(isatty(int1));
155 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-n"))
156 bc7cb1a1 2003-11-23 devnull return(!EQ(nxtarg(0), ""));
157 bc7cb1a1 2003-11-23 devnull if(EQ(a, "-z"))
158 bc7cb1a1 2003-11-23 devnull return(EQ(nxtarg(0), ""));
160 bc7cb1a1 2003-11-23 devnull p2 = nxtarg(1);
161 bc7cb1a1 2003-11-23 devnull if (p2==0)
162 bc7cb1a1 2003-11-23 devnull return(!EQ(a,""));
163 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "="))
164 bc7cb1a1 2003-11-23 devnull return(EQ(nxtarg(0), a));
166 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "!="))
167 bc7cb1a1 2003-11-23 devnull return(!EQ(nxtarg(0), a));
169 bc7cb1a1 2003-11-23 devnull if(!isint(a, &int1))
170 bc7cb1a1 2003-11-23 devnull return(!EQ(a,""));
172 bc7cb1a1 2003-11-23 devnull if(nxtintarg(&int2)){
173 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-eq"))
174 bc7cb1a1 2003-11-23 devnull return(int1==int2);
175 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-ne"))
176 bc7cb1a1 2003-11-23 devnull return(int1!=int2);
177 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-gt"))
178 bc7cb1a1 2003-11-23 devnull return(int1>int2);
179 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-lt"))
180 bc7cb1a1 2003-11-23 devnull return(int1<int2);
181 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-ge"))
182 bc7cb1a1 2003-11-23 devnull return(int1>=int2);
183 bc7cb1a1 2003-11-23 devnull if(EQ(p2, "-le"))
184 bc7cb1a1 2003-11-23 devnull return(int1<=int2);
187 bc7cb1a1 2003-11-23 devnull synbad("unknown operator ",p2);
188 bc7cb1a1 2003-11-23 devnull return 0; /* to shut ken up */
192 bc7cb1a1 2003-11-23 devnull tio(char *a, int f)
194 bc7cb1a1 2003-11-23 devnull return access (a, f) >= 0;
197 bc7cb1a1 2003-11-23 devnull /* copy to local memory; clear names for safety */
199 bc7cb1a1 2003-11-23 devnull localstat(char *f, Dir *dir)
203 bc7cb1a1 2003-11-23 devnull d = dirstat(f);
204 bc7cb1a1 2003-11-23 devnull if(d == 0)
205 bc7cb1a1 2003-11-23 devnull return(-1);
206 bc7cb1a1 2003-11-23 devnull *dir = *d;
207 bc7cb1a1 2003-11-23 devnull dir->name = 0;
208 bc7cb1a1 2003-11-23 devnull dir->uid = 0;
209 bc7cb1a1 2003-11-23 devnull dir->gid = 0;
210 bc7cb1a1 2003-11-23 devnull dir->muid = 0;
211 bc7cb1a1 2003-11-23 devnull return 0;
214 bc7cb1a1 2003-11-23 devnull /* copy to local memory; clear names for safety */
216 bc7cb1a1 2003-11-23 devnull localfstat(int f, Dir *dir)
220 bc7cb1a1 2003-11-23 devnull d = dirfstat(f);
221 bc7cb1a1 2003-11-23 devnull if(d == 0)
222 bc7cb1a1 2003-11-23 devnull return(-1);
223 bc7cb1a1 2003-11-23 devnull *dir = *d;
224 bc7cb1a1 2003-11-23 devnull dir->name = 0;
225 bc7cb1a1 2003-11-23 devnull dir->uid = 0;
226 bc7cb1a1 2003-11-23 devnull dir->gid = 0;
227 bc7cb1a1 2003-11-23 devnull dir->muid = 0;
228 bc7cb1a1 2003-11-23 devnull return 0;
232 bc7cb1a1 2003-11-23 devnull hasmode(char *f, ulong m)
234 bc7cb1a1 2003-11-23 devnull Dir dir;
236 bc7cb1a1 2003-11-23 devnull if(localstat(f,&dir)<0)
237 bc7cb1a1 2003-11-23 devnull return(0);
238 bc7cb1a1 2003-11-23 devnull return(dir.mode&m);
242 bc7cb1a1 2003-11-23 devnull isdir(char *f)
244 bc7cb1a1 2003-11-23 devnull Dir dir;
246 bc7cb1a1 2003-11-23 devnull if(localstat(f,&dir)<0)
247 bc7cb1a1 2003-11-23 devnull return(0);
248 bc7cb1a1 2003-11-23 devnull return(dir.mode&DMDIR);
252 bc7cb1a1 2003-11-23 devnull isreg(char *f)
254 bc7cb1a1 2003-11-23 devnull Dir dir;
256 bc7cb1a1 2003-11-23 devnull if(localstat(f,&dir)<0)
257 bc7cb1a1 2003-11-23 devnull return(0);
258 bc7cb1a1 2003-11-23 devnull return(!(dir.mode&DMDIR));
262 bc7cb1a1 2003-11-23 devnull fsizep(char *f)
264 bc7cb1a1 2003-11-23 devnull Dir dir;
266 bc7cb1a1 2003-11-23 devnull if(localstat(f,&dir)<0)
267 bc7cb1a1 2003-11-23 devnull return(0);
268 bc7cb1a1 2003-11-23 devnull return(dir.length>0);
272 bc7cb1a1 2003-11-23 devnull synbad(char *s1, char *s2)
274 bc7cb1a1 2003-11-23 devnull int len;
276 bc7cb1a1 2003-11-23 devnull write(2, "test: ", 6);
277 bc7cb1a1 2003-11-23 devnull if ((len = strlen(s1)) != 0)
278 bc7cb1a1 2003-11-23 devnull write(2, s1, len);
279 bc7cb1a1 2003-11-23 devnull if ((len = strlen(s2)) != 0)
280 bc7cb1a1 2003-11-23 devnull write(2, s2, len);
281 bc7cb1a1 2003-11-23 devnull write(2, "\n", 1);
282 bc7cb1a1 2003-11-23 devnull exits("bad syntax");
286 bc7cb1a1 2003-11-23 devnull isint(char *s, int *pans)
288 bc7cb1a1 2003-11-23 devnull char *ep;
290 bc7cb1a1 2003-11-23 devnull *pans = strtol(s, &ep, 0);
291 bc7cb1a1 2003-11-23 devnull return (*ep == 0);