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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
.TH LIBSIMPLE_VWEPRINTF 3 libsimple
.SH NAME
libsimple_vweprintf \- print an error message
.SH SYNOPSIS
.nf
#include <libsimple.h>
extern int libsimple_default_failure_exit;
extern void (*libsimple_eprintf_preprint)(void);
extern void (*libsimple_eprintf_postprint)(void);
void libsimple_vweprintf(const char *\fIfmt\fP, va_list \fIap\fP);
static inline void libsimple_weprintf(const char *\fIfmt\fP, ...);
static inline void libsimple_venprintf(int \fIstatus\fP, const char *\fIfmt\fP, va_list \fIap\fP);
static inline void libsimple_enprintf(int \fIstatus\fP, const char *\fIfmt\fP, ...);
static inline void libsimple_veprintf(const char *\fIfmt\fP, va_list \fIap\fP);
static inline void libsimple_eprintf(const char *\fIfmt\fP, ...);
#ifndef vweprintf
# define vweprintf libsimple_vweprintf
#endif
#ifndef weprintf
# define weprintf libsimple_weprintf
#endif
#ifndef venprintf
# define venprintf libsimple_venprintf
#endif
#ifndef enprintf
# define enprintf libsimple_enprintf
#endif
#ifndef veprintf
# define veprintf libsimple_veprintf
#endif
#ifndef eprintf
# define eprintf libsimple_eprintf
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_vweprintf ()
function is a version of the
.BR printf (3)
function. It prints the string to the standard error
(rather than the standard output), and attempts to
avoid output mangling in case multiple processes are
writting. Additionally, the output is suffixed with
.nf
\fB\(dq %s\en\(dq, \fP<\fIerror message\fP>
.fi
if
.I fmt
ends with a colon
.RB ( : ),
otherwise it is suffixed with a <newline> if
.I fmt
does not end with a <newline>; otherwise, if
.I fmt
is the empty string, the output is suffixed with
.nf
\fB\(dq%s\en\(dq, \fP<\fIerror message\fP>
.fi
Furthermore, if
.I argv0
.RB ( "char *" )
is non-null and
.I fmt
does not start with
.RB \(dq "usage :" \(dq,
the output is preffixed with
.nf
\fB\(dq%s: \(dq, \fP\fIargv0\fP
.fi
.PP
The
.BR libsimple_weprintf ()
function is a version of the
.BR libsimple_vweprintf ()
function that uses variadic arguments instead of
.BR va_list .
.PP
The
.BR libsimple_venprintf ()
and
.BR libsimple_enprintf ()
functions are versions of the
.BR libsimple_vweprintf ()
and
.BR libsimple_weprintf ()
functions that terminate the process by calling
.BR exit (3),
the exit value of the process will be
.IR status .
.PP
The
.BR libsimple_veprintf ()
and
.BR libsimple_eprintf ()
functions are versions of the
.BR libsimple_vweprintf ()
and
.BR libsimple_weprintf ()
functions that terminate the process by calling
.BR exit (3),
the exit value of the process will be
.IR libsimple_default_failure_exit (3),
which is 1 by default.
.PP
The
.BR libsimple_vweprintf (),
.BR libsimple_weprintf (),
.BR libsimple_venprintf (),
.BR libsimple_enprintf (),
.BR libsimple_veprintf (),
and
.BR libsimple_eprintf ()
functions call
.I libsimple_eprintf_preprint
unless it is
.B NULL
before they print the message, after printing
the message they call
.I libsimple_eprintf_postprint
unless it is
.BR NULL .
The
.I libsimple_eprintf_preprint
and
.I libsimple_eprintf_postprint
variables are
.B NULL
byte default.
.I errno
may have a different value from when the
.BR libsimple_vweprintf (),
.BR libsimple_weprintf (),
.BR libsimple_venprintf (),
.BR libsimple_enprintf (),
.BR libsimple_veprintf (),
or
.BR libsimple_eprintf ()
function called when
.I libsimple_eprintf_preprint
or
.I libsimple_eprintf_postprint
is called.
.SH RETURN VALUE
None.
.SH ERRORS
None.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface Attribute Value
T{
.BR libsimple_vweprintf (),
.br
.BR libsimple_weprintf (),
.br
.BR libsimple_venprintf (),
.br
.BR libsimple_enprintf (),
.br
.BR libsimple_veprintf (),
.br
.BR libsimple_eprintf ()
T} Thread safety MT-Unsafe race:strerror
T{
.BR libsimple_vweprintf (),
.br
.BR libsimple_weprintf (),
.br
.BR libsimple_venprintf (),
.br
.BR libsimple_enprintf (),
.br
.BR libsimple_veprintf (),
.br
.BR libsimple_eprintf ()
T} Async-signal safety AS-Safe
T{
.BR libsimple_vweprintf (),
.br
.BR libsimple_weprintf (),
.br
.BR libsimple_venprintf (),
.br
.BR libsimple_enprintf (),
.br
.BR libsimple_veprintf (),
.br
.BR libsimple_eprintf ()
T} Async-cancel safety AC-Safe
.TE
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH BUGS
None.
.SH SEE ALSO
.BR perror (3),
.BR fprintf (3),
.BR exit (3)
|
