1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* main.c: handles initialization of rc and command line options */
#include "rc.h"
#include <errno.h>
#include "input.h"
bool dashdee, dashee, dashvee, dashex, dasheye,
dashen, dashpee, interactive;
pid_t rc_pid;
static bool dashEYE, dashell, dashoh, dashess;
static void assigndefault(char *,...);
static void checkfd(int, enum redirtype);
extern int main(int argc, char *argv[], char *envp[]) {
char *dashsee[2], *dollarzero, *null[1];
int c;
initprint();
dashsee[0] = dashsee[1] = NULL;
dollarzero = argv[0];
rc_pid = getpid();
dashell = (*argv[0] == '-'); /* Unix tradition */
while ((c = rc_getopt(argc, argv, "c:deiIlnopsvx")) != -1)
switch (c) {
case 'c':
dashsee[0] = rc_optarg;
goto quitopts;
case 'd':
dashdee = TRUE;
break;
case 'e':
dashee = TRUE;
break;
case 'I':
dashEYE = TRUE;
interactive = FALSE;
break;
case 'i':
dasheye = interactive = TRUE;
break;
case 'l':
dashell = TRUE;
break;
case 'n':
dashen = TRUE;
break;
case 'o':
dashoh = TRUE;
break;
case 'p':
dashpee = TRUE;
break;
case 's':
dashess = TRUE;
break;
case 'v':
dashvee = TRUE;
break;
case 'x':
dashex = TRUE;
break;
case '?':
exit(1);
}
quitopts:
argv += rc_optind;
/* use isatty() iff neither -i nor -I is set, and iff the input is not from a script or -c flags */
if (!dasheye && !dashEYE && dashsee[0] == NULL && (dashess || *argv == NULL))
interactive = isatty(0);
if (!dashoh) {
checkfd(0, rFrom);
checkfd(1, rCreate);
checkfd(2, rCreate);
}
initsignal();
inithash();
initparse();
assigndefault("ifs", " ", "\t", "\n", (void *)0);
#ifdef DEFAULTPATH
assigndefault("path", DEFAULTPATH, (void *)0);
#endif
assigndefault("pid", nprint("%d", rc_pid), (void *)0);
assigndefault("prompt", "; ", "", (void *)0);
assigndefault("version", VERSION, "$Release: @(#)" PACKAGE " " VERSION " " RELDATE " $", (void *)0);
initenv(envp);
initinput();
null[0] = NULL;
starassign(dollarzero, null, FALSE); /* assign $0 to $* */
inithandler();
if (dashell) {
char *rcrc;
int fd;
rcrc = concat(varlookup("home"), word("/.rcrc", NULL))->w;
fd = rc_open(rcrc, rFrom);
if (fd == -1) {
if (errno != ENOENT)
uerror(rcrc);
} else {
bool push_interactive;
pushfd(fd);
push_interactive = interactive;
interactive = FALSE;
doit(TRUE);
interactive = push_interactive;
close(fd);
}
}
if (dashsee[0] != NULL || dashess) { /* input from -c or -s? */
if (*argv != NULL)
starassign(dollarzero, argv, FALSE);
if (dashess)
pushfd(0);
else
pushstring(dashsee, TRUE);
} else if (*argv != NULL) { /* else from a file? */
b_dot(--argv);
rc_exit(getstatus());
} else { /* else stdin */
pushfd(0);
}
dasheye = FALSE;
doit(TRUE);
rc_exit(getstatus());
return 0; /* Never really reached. */
}
static void assigndefault(char *name,...) {
va_list ap;
List *l;
char *v;
va_start(ap, name);
for (l = NULL; (v = va_arg(ap, char *)) != NULL;)
l = append(l, word(v, NULL));
varassign(name, l, FALSE);
set_exportable(name, FALSE);
if (streq(name, "path"))
alias(name, l, FALSE);
va_end(ap);
}
/* open an fd on /dev/null if it is inherited closed */
static void checkfd(int fd, enum redirtype r) {
int new = rc_open("/dev/null", r);
if (new != fd && new != -1)
close(new);
}
|
