1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * David Korn <dgk@research.att.com> *
19da2e3ebdSchin * Phong Vo <kpv@research.att.com> *
20da2e3ebdSchin * *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #pragma prototyped
23da2e3ebdSchin /*
24da2e3ebdSchin * AT&T Research
25da2e3ebdSchin *
26da2e3ebdSchin * output printf prompt and read response
27da2e3ebdSchin * if format==0 then verify that interaction is possible
28da2e3ebdSchin *
29da2e3ebdSchin * return:
30da2e3ebdSchin *
31da2e3ebdSchin * 0 [1yY+]
32da2e3ebdSchin * -1 [qQ] or EOF
33da2e3ebdSchin * 1 otherwise
34da2e3ebdSchin *
35da2e3ebdSchin * if (quit&ERROR_PROMPT) then tty forced for IO
36da2e3ebdSchin * if quit>=0 then [qQ] or EOF calls exit(quit)
37da2e3ebdSchin */
38da2e3ebdSchin
39da2e3ebdSchin #include <ast.h>
40da2e3ebdSchin #include <error.h>
41da2e3ebdSchin
42da2e3ebdSchin int
astquery(int quit,const char * format,...)43da2e3ebdSchin astquery(int quit, const char* format, ...)
44da2e3ebdSchin {
45da2e3ebdSchin va_list ap;
46da2e3ebdSchin register int n;
47da2e3ebdSchin register int c;
48*b30d1939SAndy Fiddaman int r;
49da2e3ebdSchin Sfio_t* ip;
50da2e3ebdSchin Sfio_t* op;
51da2e3ebdSchin
52da2e3ebdSchin static Sfio_t* rfp;
53da2e3ebdSchin static Sfio_t* wfp;
54da2e3ebdSchin
55*b30d1939SAndy Fiddaman r = 0;
56da2e3ebdSchin va_start(ap, format);
57da2e3ebdSchin if (!format)
58*b30d1939SAndy Fiddaman goto done;
59*b30d1939SAndy Fiddaman r = -1;
60da2e3ebdSchin if (!rfp)
61da2e3ebdSchin {
62da2e3ebdSchin c = errno;
63da2e3ebdSchin if (isatty(sffileno(sfstdin)))
64da2e3ebdSchin rfp = sfstdin;
65da2e3ebdSchin else if (!(rfp = sfopen(NiL, "/dev/tty", "r")))
66*b30d1939SAndy Fiddaman goto done;
67da2e3ebdSchin if (isatty(sffileno(sfstderr)))
68da2e3ebdSchin wfp = sfstderr;
69da2e3ebdSchin else if (!(wfp = sfopen(NiL, "/dev/tty", "w")))
70*b30d1939SAndy Fiddaman goto done;
71da2e3ebdSchin errno = c;
72da2e3ebdSchin }
73da2e3ebdSchin if (quit & ERROR_PROMPT)
74da2e3ebdSchin {
75da2e3ebdSchin quit &= ~ERROR_PROMPT;
76da2e3ebdSchin ip = rfp;
77da2e3ebdSchin op = wfp;
78da2e3ebdSchin }
79da2e3ebdSchin else
80da2e3ebdSchin {
81da2e3ebdSchin ip = sfstdin;
82da2e3ebdSchin op = sfstderr;
83da2e3ebdSchin }
84da2e3ebdSchin sfsync(sfstdout);
85da2e3ebdSchin sfvprintf(op, format, ap);
86da2e3ebdSchin sfsync(op);
87da2e3ebdSchin for (n = c = sfgetc(ip);; c = sfgetc(ip))
88da2e3ebdSchin switch (c)
89da2e3ebdSchin {
90da2e3ebdSchin case EOF:
91da2e3ebdSchin n = c;
92da2e3ebdSchin /*FALLTHROUGH*/
93da2e3ebdSchin case '\n':
94da2e3ebdSchin switch (n)
95da2e3ebdSchin {
96da2e3ebdSchin case EOF:
97da2e3ebdSchin case 'q':
98da2e3ebdSchin case 'Q':
99da2e3ebdSchin if (quit >= 0)
100da2e3ebdSchin exit(quit);
101*b30d1939SAndy Fiddaman goto done;
102da2e3ebdSchin case '1':
103da2e3ebdSchin case 'y':
104da2e3ebdSchin case 'Y':
105da2e3ebdSchin case '+':
106*b30d1939SAndy Fiddaman r = 0;
107*b30d1939SAndy Fiddaman goto done;
108da2e3ebdSchin }
109da2e3ebdSchin return 1;
110da2e3ebdSchin }
111*b30d1939SAndy Fiddaman done:
112da2e3ebdSchin va_end(ap);
113*b30d1939SAndy Fiddaman return r;
114da2e3ebdSchin }
115