tenv.c - plan9port - [fork] Plan 9 from user space | |
git clone git://src.adamsgaard.dk/plan9port | |
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tenv.c (2332B) | |
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1 #include "mk.h" | |
2 | |
3 enum { | |
4 ENVQUANTA=10 | |
5 }; | |
6 | |
7 Envy *envy; | |
8 static int nextv; | |
9 | |
10 static char *myenv[] = | |
11 { | |
12 "target", | |
13 "stem", | |
14 "prereq", | |
15 "pid", | |
16 "nproc", | |
17 "newprereq", | |
18 "alltarget", | |
19 "newmember", | |
20 "stem0", /* must be in order from here */ | |
21 "stem1", | |
22 "stem2", | |
23 "stem3", | |
24 "stem4", | |
25 "stem5", | |
26 "stem6", | |
27 "stem7", | |
28 "stem8", | |
29 "stem9", | |
30 0 | |
31 }; | |
32 | |
33 void | |
34 initenv(void) | |
35 { | |
36 char **p; | |
37 | |
38 for(p = myenv; *p; p++) | |
39 symlook(*p, S_INTERNAL, (void *)""); | |
40 readenv(); /* o.s. dependent */ | |
41 } | |
42 | |
43 static void | |
44 envinsert(char *name, Word *value) | |
45 { | |
46 static int envsize; | |
47 | |
48 if (nextv >= envsize) { | |
49 envsize += ENVQUANTA; | |
50 envy = (Envy *) Realloc((char *) envy, envsize*sizeof(En… | |
51 } | |
52 envy[nextv].name = name; | |
53 envy[nextv++].values = value; | |
54 } | |
55 | |
56 static void | |
57 envupd(char *name, Word *value) | |
58 { | |
59 Envy *e; | |
60 | |
61 for(e = envy; e->name; e++) | |
62 if(strcmp(name, e->name) == 0){ | |
63 delword(e->values); | |
64 e->values = value; | |
65 return; | |
66 } | |
67 e->name = name; | |
68 e->values = value; | |
69 envinsert(0,0); | |
70 } | |
71 | |
72 static void | |
73 ecopy(Symtab *s) | |
74 { | |
75 char **p; | |
76 | |
77 if(symlook(s->name, S_NOEXPORT, 0)) | |
78 return; | |
79 for(p = myenv; *p; p++) | |
80 if(strcmp(*p, s->name) == 0) | |
81 return; | |
82 envinsert(s->name, s->u.ptr); | |
83 } | |
84 | |
85 void | |
86 execinit(void) | |
87 { | |
88 char **p; | |
89 | |
90 nextv = 0; | |
91 for(p = myenv; *p; p++) | |
92 envinsert(*p, stow("")); | |
93 | |
94 symtraverse(S_VAR, ecopy); | |
95 envinsert(0, 0); | |
96 } | |
97 | |
98 Envy* | |
99 buildenv(Job *j, int slot) | |
100 { | |
101 char **p, *cp, *qp; | |
102 Word *w, *v, **l; | |
103 int i; | |
104 char buf[256]; | |
105 | |
106 envupd("target", wdup(j->t)); | |
107 if(j->r->attr®EXP) | |
108 envupd("stem",newword("")); | |
109 else | |
110 envupd("stem", newword(j->stem)); | |
111 envupd("prereq", wdup(j->p)); | |
112 sprint(buf, "%d", getpid()); | |
113 envupd("pid", newword(buf)); | |
114 sprint(buf, "%d", slot); | |
115 envupd("nproc", newword(buf)); | |
116 envupd("newprereq", wdup(j->np)); | |
117 envupd("alltarget", wdup(j->at)); | |
118 l = &v; | |
119 v = w = wdup(j->np); | |
120 while(w){ | |
121 cp = strchr(w->s, '('); | |
122 if(cp){ | |
123 qp = strchr(cp+1, ')'); | |
124 if(qp){ | |
125 *qp = 0; | |
126 /* strcpy, but might overlap */ | |
127 memmove(w->s, cp+1, strlen(cp+1)+1); | |
128 l = &w->next; | |
129 w = w->next; | |
130 continue; | |
131 } | |
132 } | |
133 *l = w->next; | |
134 free(w->s); | |
135 free(w); | |
136 w = *l; | |
137 } | |
138 envupd("newmember", v); | |
139 /* update stem0 -> stem9 */ | |
140 for(p = myenv; *p; p++) | |
141 if(strcmp(*p, "stem0") == 0) | |
142 break; | |
143 for(i = 0; *p; i++, p++){ | |
144 if((j->r->attr®EXP) && j->match[i]) | |
145 envupd(*p, newword(j->match[i])); | |
146 else | |
147 envupd(*p, newword("")); | |
148 } | |
149 return envy; | |
150 } |