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
|
/*
* showfile.c -- invoke the `lproc' command
*
* $Id: showfile.c,v 1.2 2002/07/02 22:09:14 kenh Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <h/mh.h>
int
showfile (char **arg, char *file)
{
pid_t pid;
int isdraft, vecp;
char *vec[MAXARGS];
context_save(); /* save the context file */
fflush(stdout);
/*
* If you have your lproc listed as "mhl",
* then really invoked the mhlproc instead
* (which is usually mhl anyway).
*/
if (!strcmp (r1bindex (lproc, '/'), "mhl"))
lproc = mhlproc;
switch (pid = vfork()) {
case -1:
/* fork error */
advise ("fork", "unable to");
return 1;
case 0:
/* child */
vecp = 0;
vec[vecp++] = r1bindex (lproc, '/');
isdraft = 1;
if (arg) {
while (*arg) {
if (**arg != '-')
isdraft = 0;
vec[vecp++] = *arg++;
}
}
if (isdraft) {
if (!strcmp (vec[0], "show"))
vec[vecp++] = "-file";
vec[vecp++] = file;
}
vec[vecp] = NULL;
execvp (lproc, vec);
fprintf (stderr, "unable to exec ");
perror (lproc);
_exit (-1);
default:
/* parent */
return (pidwait (pid, -1) & 0377 ? 1 : 0);
}
return 1; /* NOT REACHED */
}
|
