1 .\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>.
3 .\" %%%LICENSE_START(VERBATIM)
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18 .\" which is licensed free of charge, as they might when working
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25 .TH UNLOCKED_STDIO 3 2008-08-29 "" "Linux Programmer's Manual"
27 getc_unlocked, getchar_unlocked, putc_unlocked,
28 putchar_unlocked \- nonlocking stdio functions
33 .BI "int getc_unlocked(FILE *" stream );
34 .B "int getchar_unlocked(void);"
35 .BI "int putc_unlocked(int " c ", FILE *" stream );
36 .BI "int putchar_unlocked(int " c );
38 .BI "void clearerr_unlocked(FILE *" stream );
39 .BI "int feof_unlocked(FILE *" stream );
40 .BI "int ferror_unlocked(FILE *" stream );
41 .BI "int fileno_unlocked(FILE *" stream );
42 .BI "int fflush_unlocked(FILE *" stream );
43 .BI "int fgetc_unlocked(FILE *" stream );
44 .BI "int fputc_unlocked(int " c ", FILE *" stream );
45 .BI "size_t fread_unlocked(void *" ptr ", size_t " size ", size_t " n ,
46 .BI " FILE *" stream );
47 .BI "size_t fwrite_unlocked(const void *" ptr ", size_t " size ", size_t " n ,
48 .BI " FILE *" stream );
50 .BI "char *fgets_unlocked(char *" s ", int " n ", FILE *" stream );
51 .BI "int fputs_unlocked(const char *" s ", FILE *" stream );
55 .BI "wint_t getwc_unlocked(FILE *" stream );
56 .B "wint_t getwchar_unlocked(void);"
57 .BI "wint_t fgetwc_unlocked(FILE *" stream );
58 .BI "wint_t fputwc_unlocked(wchar_t " wc ", FILE *" stream );
59 .BI "wint_t putwc_unlocked(wchar_t " wc ", FILE *" stream );
60 .BI "wint_t putwchar_unlocked(wchar_t " wc );
61 .BI "wchar_t *fgetws_unlocked(wchar_t *" ws ", int " n ", FILE *" stream );
62 .BI "int fputws_unlocked(const wchar_t *" ws ", FILE *" stream );
66 Feature Test Macro Requirements for glibc (see
67 .BR feature_test_macros (7)):
72 .BR getchar_unlocked (),
74 .BR putchar_unlocked ():
76 _POSIX_C_SOURCE\ >=\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE ||
77 _BSD_SOURCE || _SVID_SOURCE
80 .BR clearerr_unlocked (),
82 .BR ferror_unlocked (),
83 .BR fileno_unlocked (),
84 .BR fflush_unlocked (),
85 .BR fgetc_unlocked (),
86 .BR fputc_unlocked (),
87 .BR fread_unlocked (),
88 .BR fwrite_unlocked ():
90 _BSD_SOURCE || _SVID_SOURCE
93 .BR fgets_unlocked (),
94 .BR fputs_unlocked (),
95 .BR getwc_unlocked (),
96 .BR getwchar_unlocked (),
97 .BR fgetwc_unlocked (),
98 .BR fputwc_unlocked (),
99 .BR putwchar_unlocked (),
100 .BR fgetws_unlocked (),
101 .BR fputws_unlocked ():
107 Each of these functions has the same behavior as its counterpart
108 without the "_unlocked" suffix, except that they do not use locking
109 (they do not set locks themselves, and do not test for the presence
110 of locks set by others) and hence are thread-unsafe.
115 .BR getc_unlocked (),
116 .BR getchar_unlocked (),
117 .BR putc_unlocked (),
118 .BR putchar_unlocked ()
123 variants occur on a few UNIX systems, and are available in recent glibc.
124 .\" E.g., in HP-UX 10.0. In HP-UX 10.30 they are called obsolescent, and
125 .\" moved to a compatibility library.
126 .\" Available in HP-UX 10.0: clearerr_unlocked, fclose_unlocked,
127 .\" feof_unlocked, ferror_unlocked, fflush_unlocked, fgets_unlocked,
128 .\" fgetwc_unlocked, fgetws_unlocked, fileno_unlocked, fputs_unlocked,
129 .\" fputwc_unlocked, fputws_unlocked, fread_unlocked, fseek_unlocked,
130 .\" ftell_unlocked, fwrite_unlocked, getc_unlocked, getchar_unlocked,
131 .\" getw_unlocked, getwc_unlocked, getwchar_unlocked, putc_unlocked,
132 .\" putchar_unlocked, puts_unlocked, putws_unlocked, putw_unlocked,
133 .\" putwc_unlocked, putwchar_unlocked, rewind_unlocked, setvbuf_unlocked,
134 .\" ungetc_unlocked, ungetwc_unlocked.
135 They should probably not be used.
140 This page is part of release 3.79 of the Linux
143 A description of the project,
144 information about reporting bugs,
145 and the latest version of this page,
147 \%http://www.kernel.org/doc/man\-pages/.