Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

putw(3s) [bsd man page]

PUTC(3S)																  PUTC(3S)

putc, putchar, fputc, putw - put character or word on a stream SYNOPSIS
#include <stdio.h> int putc(c, stream) char c; FILE *stream; int putchar(c) int fputc(c, stream) FILE *stream; int putw(w, stream) FILE *stream; DESCRIPTION
Putc appends the character c to the named output stream. It returns the character written. Putchar(c) is defined as putc(c, stdout). Fputc behaves like putc, but is a genuine function rather than a macro. Putw appends word (that is, int) w to the output stream. It returns the word written. Putw neither assumes nor causes special alignment in the file. SEE ALSO
fopen(3S), fclose(3S), getc(3S), puts(3S), printf(3S), fread(3S) DIAGNOSTICS
These functions return the constant EOF upon error. Since this is a good integer, ferror(3S) should be used to detect putw errors. BUGS
Because it is implemented as a macro, putc treats a stream argument with side effects improperly. In particular putc(c, *f++); doesn't work sensibly. Errors can occur long after the call to putc. 7th Edition November 6, 1985 PUTC(3S)

Check Out this Related Man Page

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

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
Man Page