STDIO.H(3HEAD)STDIO.H(3HEAD)NAME
stdio.h, stdio - standard buffered input/output
SYNOPSIS
#include <stdio.h>
DESCRIPTION
The <stdio.h> header defines the following macros as positive integer
constant expressions:
BUFSIZ
size of <stdio.h> buffers
_IOFBF
input/output fully buffered
_IOLBF
input/output line buffered
_IONBF
input/output unbuffered
L_ctermid
maximum size of character array to hold ctermid() output
L_tmpnam
maximum size of character array to hold tmpnam() output
SEEK_CUR
seek relative to current position
SEEK_END
seek relative to end-of-file
SEEK_SET
seek relative to start-of-file
The following macros are defined as positive integer constant expres‐
sions that denote implementation limits:
{FILENAME_MAX}
Maximum size in bytes of the longest filename string
that the implementation guarantees can be opened.
{FOPEN_MAX}
Number of streams that the implementation guarantees
can be open simultaneously. The value is at least
eight.
{TMP_MAX}
Minimum number of unique filenames generated by tmp‐
nam(). Maximum number of times an application can
call tmpnam() reliably. The value of {TMP_MAX} is at
least 25. On XSI-conformant systems, the value of
{TMP_MAX} is at least 10000.
The following macro name is defined as a negative integer constant
expression:
EOF
end-of-file return value
The following macro name is defined as a null pointer constant:
NULL
null pointer
The following macro name is defined as a string constant:
P_tmpdir
default directory prefix for tempnam()
The following is defined as expressions of type "pointer to FILE" point
to the FILE objects associated, respectively, with the standard error,
input, and output streams:
stderr
standard error output stream
stdin
standard input stream
stdout
standard output stream
The following data types are defined through typedef:
FILE
structure containing information about a file
fpos_t
non-array type containing all information needed to specify
uniquely every position within a file
va_list
as described in <stdarg.h>
size_t
as described in <stddef.h>
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Standard │
└────────────────────┴─────────────────┘
SEE ALSOrename(2), ctermid(3C), fclose(3C), fdopen(3C), fflush(3C), fgetc(3C),
fgetpos(3C), fgets(3C), flockfile(3C), fopen(3C), fputc(3C), fputs(3C),
fputwc(3C), fread(3C), freopen(3C), fseek(3C), fsetpos(3C), ftell(3C),
fwrite(3C), getwchar(3C), getopt(3C), perror(3C), popen(3C),
printf(3C), remove(3C), rewind(3C), scanf(3C), setbuf(3C), stdio(3C),
system(3C), tmpfile(3C), tmpnam(3C), ungetc(3C), vprintf(3C),
attributes(5), standards(5)
Sep 10, 2004 STDIO.H(3HEAD)
