Commit | Line | Data |
---|---|---|
a8f68b84 TL |
1 | # |
2 | /* | |
3 | * UNIX shell | |
4 | * | |
5 | * S. R. Bourne | |
6 | * Bell Telephone Laboratories | |
7 | * | |
8 | */ | |
9 | ||
10 | #include "defs.h" | |
11 | ||
12 | PROC STRING *copyargs(); | |
13 | LOCAL DOLPTR dolh; | |
14 | ||
15 | CHAR flagadr[10]; | |
16 | ||
17 | CHAR flagchar[] = { | |
18 | 'x', 'n', 'v', 't', 's', 'i', 'e', 'r', 'k', 'u', 0 | |
19 | }; | |
20 | INT flagval[] = { | |
21 | execpr, noexec, readpr, oneflg, stdflg, intflg, errflg, rshflg, keyflg, setflg, 0 | |
22 | }; | |
23 | ||
24 | /* ======== option handling ======== */ | |
25 | ||
26 | ||
27 | INT options(argc,argv) | |
28 | STRING *argv; | |
29 | INT argc; | |
30 | { | |
31 | REG STRING cp; | |
32 | REG STRING *argp=argv; | |
33 | REG STRING flagc; | |
34 | STRING flagp; | |
35 | ||
36 | IF argc>1 ANDF *argp[1]=='-' | |
37 | THEN cp=argp[1]; | |
38 | flags &= ~(execpr|readpr); | |
39 | WHILE *++cp | |
40 | DO flagc=flagchar; | |
41 | ||
42 | WHILE *flagc ANDF *flagc != *cp DO flagc++ OD | |
43 | IF *cp == *flagc | |
44 | THEN flags |= flagval[flagc-flagchar]; | |
45 | ELIF *cp=='c' ANDF argc>2 ANDF comdiv==0 | |
46 | THEN comdiv=argp[2]; | |
47 | argp[1]=argp[0]; argp++; argc--; | |
48 | ELSE failed(argv[1],badopt); | |
49 | FI | |
50 | OD | |
51 | argp[1]=argp[0]; argc--; | |
52 | FI | |
53 | ||
54 | /* set up $- */ | |
55 | flagc=flagchar; | |
56 | flagp=flagadr; | |
57 | WHILE *flagc | |
58 | DO IF flags&flagval[flagc-flagchar] | |
59 | THEN *flagp++ = *flagc; | |
60 | FI | |
61 | flagc++; | |
62 | OD | |
63 | *flagp++=0; | |
64 | ||
65 | return(argc); | |
66 | } | |
67 | ||
68 | VOID setargs(argi) | |
69 | STRING argi[]; | |
70 | { | |
71 | /* count args */ | |
72 | REG STRING *argp=argi; | |
73 | REG INT argn=0; | |
74 | ||
75 | WHILE Rcheat(*argp++)!=ENDARGS DO argn++ OD | |
76 | ||
77 | /* free old ones unless on for loop chain */ | |
78 | freeargs(dolh); | |
79 | dolh=copyargs(argi,argn); /* sets dolv */ | |
80 | assnum(&dolladr,dolc=argn-1); | |
81 | } | |
82 | ||
83 | freeargs(blk) | |
84 | DOLPTR blk; | |
85 | { | |
86 | REG STRING *argp; | |
87 | REG DOLPTR argr=0; | |
88 | REG DOLPTR argblk; | |
89 | ||
90 | IF argblk=blk | |
91 | THEN argr = argblk->dolnxt; | |
92 | IF (--argblk->doluse)==0 | |
93 | THEN FOR argp=argblk->dolarg; Rcheat(*argp)!=ENDARGS; argp++ | |
94 | DO free(*argp) OD | |
95 | free(argblk); | |
96 | FI | |
97 | FI | |
98 | return(argr); | |
99 | } | |
100 | ||
101 | LOCAL STRING * copyargs(from, n) | |
102 | STRING from[]; | |
103 | { | |
104 | REG STRING * np=alloc(sizeof(STRING*)*n+3*BYTESPERWORD); | |
105 | REG STRING * fp=from; | |
106 | REG STRING * pp=np; | |
107 | ||
108 | np->doluse=1; /* use count */ | |
109 | np=np->dolarg; | |
110 | dolv=np; | |
111 | ||
112 | WHILE n-- | |
113 | DO *np++ = make(*fp++) OD | |
114 | *np++ = ENDARGS; | |
115 | return(pp); | |
116 | } | |
117 | ||
118 | clearup() | |
119 | { | |
120 | /* force `for' $* lists to go away */ | |
121 | WHILE argfor=freeargs(argfor) DONE | |
122 | ||
123 | /* clean up io files */ | |
124 | WHILE pop() DONE | |
125 | } | |
126 | ||
127 | DOLPTR useargs() | |
128 | { | |
129 | IF dolh | |
130 | THEN dolh->doluse++; | |
131 | dolh->dolnxt=argfor; | |
132 | return(argfor=dolh); | |
133 | ELSE return(0); | |
134 | FI | |
135 | } |