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/*
* test expression
* [ expression ]
*/
#include "defs.h"
#include <sys/types.h>
#include <sys/stat.h>
#define exp exp_
INT ap, ac;
STRING *av;
test(argn, com)
STRING com[];
INT argn;
{
ac = argn; av = com; ap = 1;
IF eq(com[0],"[")
THEN IF !eq(com[--ac], "]")
THEN failed("test", "] missing");
FI
FI
com[ac] = 0;
IF ac <= 1 THEN return(1) FI
return(exp()?0:1);
}
STRING nxtarg(mt) {
IF ap >= ac
THEN IF mt
THEN ap++;
return(0);
FI
failed("test", "argument expected");
FI
return(av[ap++]);
}
exp() {
INT p1;
STRING p2;
p1 = e1();
p2 = nxtarg(1);
IF eq(p2, "-o") THEN return(p1 | exp()) FI
IF (p2!=0)&&!eq(p2,"]")&&!eq(p2,")")
THEN failed("test", synmsg);
FI
ap--;
return(p1);
}
e1() {
INT p1;
p1 = e2();
IF eq(nxtarg(1), "-a") THEN return(p1 & e1()) FI
ap--;
return(p1);
}
e2() {
IF eq(nxtarg(0), "!")
THEN return(!e3())
FI
ap--;
return(e3());
}
e3() {
INT p1;
REG STRING a;
STRING p2;
L_INT atol();
L_INT int1, int2;
a=nxtarg(0);
IF eq(a, "(")
THEN p1 = exp();
IF !eq(nxtarg(0), ")") THEN failed("test",") expected") FI
return(p1);
FI
p2 = nxtarg(1);
ap--;
IF !eq(p2,"=")&&!eq(p2,"!=")
THEN IF eq(a, "-r") THEN return(tio(nxtarg(0), 4)) FI
IF eq(a, "-w") THEN return(tio(nxtarg(0), 2)) FI
IF eq(a, "-x") THEN return(tio(nxtarg(0), 1)) FI
IF eq(a, "-d") THEN return(ftype(nxtarg(0), S_IFDIR)) FI
IF eq(a, "-c") THEN return(ftype(nxtarg(0),S_IFCHR)) FI
IF eq(a, "-b") THEN return(ftype(nxtarg(0), S_IFBLK)) FI
IF eq(a, "-f") THEN return(ftype(nxtarg(0), S_IFREG)) FI
IF eq(a, "-u") THEN return(ftype(nxtarg(0), S_ISUID)) FI
IF eq(a, "-g") THEN return(ftype(nxtarg(0), S_ISGID)) FI
IF eq(a, "-k") THEN return(ftype(nxtarg(0), S_ISVTX)) FI
IF eq(a, "-s") THEN return(fsizep(nxtarg(0))) FI
IF eq(a, "-t")
THEN IF ap >= ac /* no args */
THEN return(isatty(1));
ELIF eq((a=nxtarg(0)), "-a")
ORF eq(a, "-o")
THEN ap--;
return(isatty(1));
ELSE return(isatty(atol(a)));
FI
FI
IF eq(a, "-n") THEN return(!eq(nxtarg(0), "")) FI
IF eq(a, "-z") THEN return(eq(nxtarg(0), "")) FI
FI
p2 = nxtarg(1);
IF p2==0 THEN return(!eq(a, "")) FI
IF eq(p2, "-a") ORF eq(p2, "-o")
THEN ap--;
return(!eq(a, ""))
FI
IF eq(p2, "=") THEN return(eq(nxtarg(0), a)) FI
IF eq(p2, "!=") THEN return(!eq(nxtarg(0), a)) FI
int1 = atol(a);
int2 = atol(nxtarg(0));
IF eq(p2, "-eq") THEN return(int1==int2) FI
IF eq(p2, "-ne") THEN return(int1!=int2) FI
IF eq(p2, "-gt") THEN return(int1>int2) FI
IF eq(p2, "-lt") THEN return(int1<int2) FI
IF eq(p2, "-ge") THEN return(int1>=int2) FI
IF eq(p2, "-le") THEN return(int1<=int2) FI
bfailed(btest, badop, p2);
}
tio(a, f)
STRING a;
INT f;
{
IF access(a, f)==0
THEN return(1);
ELSE return(0)
FI
}
ftype(f,field)
STRING f;
INT field;
{
struct stat statb;
IF stat(f,&statb)<0 THEN return(0) FI
IF (statb.st_mode&field)==field
THEN return(1);
ELSE return(0)
FI
}
fsizep(f)
STRING f;
{
struct stat statb;
IF stat(f, &statb) <0 THEN return(0) FI
return(statb.st_size>0);
}
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