1 /*
2 * Copyright 1987, 1988 by MIT Student Information Processing Board.
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose is hereby granted, provided that
6 * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
7 * advertising or publicity pertaining to distribution of the software
8 * without specific, written prior permission. M.I.T. and the
9 * M.I.T. S.I.P.B. make no representations about the suitability of
10 * this software for any purpose. It is provided "as is" without
11 * express or implied warranty.
12 */
13
14 #include "config.h"
15 #include <stdio.h>
16 #ifdef HAVE_TERMIOS_H
17 #include <termios.h>
18 #endif
19 #ifdef HAVE_UNISTD_H
20 #include <unistd.h>
21 #endif
22 #include "com_err.h"
23 #include "error_table.h"
24 #include "internal.h"
25
26 static void
27 default_com_err_proc (const char *whoami, errcode_t code, const
28 char *fmt, va_list args)
29 COM_ERR_ATTR((format(printf, 3, 0)));
30
31 static void
default_com_err_proc(const char * whoami,errcode_t code,const char * fmt,va_list args)32 default_com_err_proc (const char *whoami, errcode_t code, const
33 char *fmt, va_list args)
34 {
35 int do_cr = 1, fd = fileno(stderr);
36
37 if (whoami) {
38 fputs(whoami, stderr);
39 fputs(": ", stderr);
40 }
41 if (code) {
42 fputs(error_message(code), stderr);
43 fputs(" ", stderr);
44 }
45 if (fmt) {
46 vfprintf (stderr, fmt, args);
47 }
48 if (!isatty(fd))
49 do_cr = 0;
50 #ifdef HAVE_TERMIOS_H
51 else {
52 struct termios t;
53
54 if ((tcgetattr(fd, &t)) == 0 &&
55 (t.c_oflag & OPOST) && (t.c_oflag & ONLCR))
56 do_cr = 0;
57 }
58 #endif
59 if (do_cr)
60 fputc('\r', stderr);
61 fputc('\n', stderr);
62 fflush(stderr);
63 }
64
65 typedef void (*errf) (const char *, errcode_t, const char *, va_list);
66
67 errf com_err_hook = default_com_err_proc;
68
com_err_va(const char * whoami,errcode_t code,const char * fmt,va_list args)69 void com_err_va (const char *whoami, errcode_t code, const char *fmt,
70 va_list args)
71 {
72 (*com_err_hook) (whoami, code, fmt, args);
73 }
74
com_err(const char * whoami,errcode_t code,const char * fmt,...)75 void com_err (const char *whoami,
76 errcode_t code,
77 const char *fmt, ...)
78 {
79 va_list pvar;
80
81 if (!com_err_hook)
82 com_err_hook = default_com_err_proc;
83 va_start(pvar, fmt);
84 com_err_va (whoami, code, fmt, pvar);
85 va_end(pvar);
86 }
87
set_com_err_hook(errf new_proc)88 errf set_com_err_hook(errf new_proc)
89 {
90 errf x = com_err_hook;
91
92 if (new_proc)
93 com_err_hook = new_proc;
94 else
95 com_err_hook = default_com_err_proc;
96
97 return x;
98 }
99
reset_com_err_hook(void)100 errf reset_com_err_hook(void) {
101 errf x = com_err_hook;
102 com_err_hook = default_com_err_proc;
103 return x;
104 }
105