1 /*++
2 /* NAME
3 /* msg_vstream 3
4 /* SUMMARY
5 /* report diagnostics to VSTREAM
6 /* SYNOPSIS
7 /* #include <msg_vstream.h>
8 /*
9 /* void msg_vstream_init(progname, stream)
10 /* const char *progname;
11 /* VSTREAM *stream;
12 /* DESCRIPTION
13 /* This module implements support to report msg(3) diagnostics
14 /* to a VSTREAM.
15 /*
16 /* msg_vstream_init() sets the program name that appears in each output
17 /* record, and directs diagnostics (see msg(3)) to the specified
18 /* VSTREAM. The \fIprogname\fR argument is not copied.
19 /* SEE ALSO
20 /* msg(3)
21 /* BUGS
22 /* No guarantee that long records are written atomically.
23 /* Only the last msg_vstream_init() call takes effect.
24 /* LICENSE
25 /* .ad
26 /* .fi
27 /* The Secure Mailer license must be distributed with this software.
28 /* AUTHOR(S)
29 /* Wietse Venema
30 /* IBM T.J. Watson Research
31 /* P.O. Box 704
32 /* Yorktown Heights, NY 10598, USA
33 /*--*/
34
35 /* System libraries. */
36
37 #include <sys_defs.h>
38 #include <errno.h>
39 #include <stdlib.h> /* 44BSD stdarg.h uses abort() */
40 #include <stdarg.h>
41
42 /* Utility library. */
43
44 #include "vstream.h"
45 #include "msg.h"
46 #include "msg_output.h"
47 #include "msg_vstream.h"
48
49 /*
50 * Private state.
51 */
52 static const char *msg_tag;
53 static VSTREAM *msg_stream;
54
55 /* msg_vstream_print - log diagnostic to VSTREAM */
56
msg_vstream_print(int level,const char * text)57 static void msg_vstream_print(int level, const char *text)
58 {
59 static const char *level_text[] = {
60 "info", "warning", "error", "fatal", "panic",
61 };
62
63 if (level < 0 || level >= (int) (sizeof(level_text) / sizeof(level_text[0])))
64 msg_panic("invalid severity level: %d", level);
65 if (level == MSG_INFO) {
66 vstream_fprintf(msg_stream, "%s: %s\n",
67 msg_tag, text);
68 } else {
69 vstream_fprintf(msg_stream, "%s: %s: %s\n",
70 msg_tag, level_text[level], text);
71 }
72 vstream_fflush(msg_stream);
73 }
74
75 /* msg_vstream_init - initialize */
76
msg_vstream_init(const char * name,VSTREAM * vp)77 void msg_vstream_init(const char *name, VSTREAM *vp)
78 {
79 static int first_call = 1;
80
81 msg_tag = name;
82 msg_stream = vp;
83 if (first_call) {
84 first_call = 0;
85 msg_output(msg_vstream_print);
86 }
87 }
88