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
|
############################################################################
#
# File: oldicon.icn
#
# Subject: Program to update the date in an Icon program header
#
# Author: Ralph E. Griswold
#
# Date: September 23, 1996
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This program updates the date line in a standard Icon program header.
# The old file is saved with the suffix ".bak".
#
# The file then is brought up in the vi editor unless the -f option
# is specified.
#
############################################################################
#
# Requires: system(), vi(1), UNIX
#
############################################################################
#
# Links: datetime, options
#
############################################################################
link datetime
link options
procedure main(args)
local name, input, output, line, opts
opts := options(args, "f")
name := (args[1] | "foo")
if (*name < 4) | (name[-4:0] ~== ".icn") then name ||:= ".icn"
if system("cp " || name || " " || name || ".bak >/dev/null") ~= 0 then {
if /opts["f"] then system("vi " || name) # if file didn't exist
exit()
}
input := open(name || ".bak") | stop("*** cannot open backup file")
output := open(name, "w") | stop("*** cannot open ", name, " for writing")
repeat { # to provide a way out ...
every 1 to 8 do write(output, read(input)) | break
line := read(input) | break
line ? {
write(output, ="# Date: ", date()) | write(output, tab(0))
}
break
}
while write(output, read(input))
close(output)
if /opts["f"] then system("vi " || name)
end
|
