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putc(3) [netbsd man page]

PUTC(3) 						   BSD Library Functions Manual 						   PUTC(3)

NAME
fputc, putc, putchar, putc_unlocked, putchar_unlocked, putw -- output a character or word to a stream LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdio.h> int fputc(int c, FILE *stream); int putc(int c, FILE *stream); int putchar(int c); int putc_unlocked(int c, FILE *stream); int putchar_unlocked(int c); int putw(int w, FILE *stream); DESCRIPTION
The fputc() function writes the character c (converted to an ``unsigned char'') to the output stream pointed to by stream. putc() acts essentially identically to fputc(), but is a macro that expands in-line. It may evaluate stream more than once, so arguments given to putc() should not be expressions with potential side effects. putchar() is identical to putc() with an output stream of stdout. The putc_unlocked() and putchar_unlocked() functions provide functionality identical to that of putc() and putchar(), respectively, but do not perform implicit locking of the streams they operate on. In multi-threaded programs they may be used only within a scope in which the stream has been successfully locked by the calling thread using either flockfile(3) or ftrylockfile(3), and may later be released using funlockfile(3). The putw() function writes the specified int to the named output stream. RETURN VALUES
The functions, fputc(), putc() and putchar() return the character written. If an error occurs, the value EOF is returned. The putw() func- tion returns 0 on success; EOF is returned if a write error occurs, or if an attempt is made to write a read-only stream. SEE ALSO
ferror(3), fopen(3), getc(3), stdio(3) STANDARDS
The functions fputc(), putc(), and putchar(), conform to ANSI X3.159-1989 (``ANSI C89''). The functions putc_unlocked() and putchar_unlocked() conform to ISO/IEC 9945-1:1996 (``POSIX.1''). HISTORY
The functions putc(), putchar(), and putw() first appeared in Version 6 AT&T UNIX. The function fputc() appeared in Version 7 AT&T UNIX. BUGS
The size and byte order of an int varies from one machine to another, and putw() is not recommended for portable applications. BSD
May 6, 2010 BSD

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PUTC(3) 						   BSD Library Functions Manual 						   PUTC(3)

NAME
fputc, putc, putc_unlocked, putchar, putchar_unlocked, putw -- output a character or word to a stream LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdio.h> int fputc(int c, FILE *stream); int putc(int c, FILE *stream); int putc_unlocked(int c, FILE *stream); int putchar(int c); int putchar_unlocked(int c); int putw(int w, FILE *stream); DESCRIPTION
The fputc() function writes the character c (converted to an ``unsigned char'') to the output stream pointed to by stream. The putc() macro acts essentially identically to fputc(), but is a macro that expands in-line. It may evaluate stream more than once, so arguments given to putc() should not be expressions with potential side effects. The putchar() function is identical to putc() with an output stream of stdout. The putw() function writes the specified int to the named output stream. The putc_unlocked() and putchar_unlocked() functions are equivalent to putc() and putchar() respectively, except that the caller is responsi- ble for locking the stream with flockfile(3) before calling them. These functions may be used to avoid the overhead of locking the stream for each character, and to avoid output being interspersed from multiple threads writing to the same stream. RETURN VALUES
The functions, fputc(), putc(), putchar(), putc_unlocked(), and putchar_unlocked() return the character written. If an error occurs, the value EOF is returned. The putw() function returns 0 on success; EOF is returned if a write error occurs, or if an attempt is made to write a read-only stream. SEE ALSO
ferror(3), flockfile(3), fopen(3), getc(3), putwc(3), stdio(3) STANDARDS
The functions fputc(), putc(), and putchar(), conform to ISO/IEC 9899:1990 (``ISO C90''). The putc_unlocked() and putchar_unlocked() func- tions conform to IEEE Std 1003.1-2001 (``POSIX.1''). A function putw() function appeared in Version 6 AT&T UNIX. BUGS
The size and byte order of an int varies from one machine to another, and putw() is not recommended for portable applications. BSD
January 10, 2003 BSD

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