stdio.h.html

IEEE 1003.1-2003, Single Unix Specification v3

<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      fileno(FILE *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
<sup>[<a href="javascript:open_code('TSF')">TSF</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
void     flockfile(FILE *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
FILE    *fopen(const char *restrict, const char *restrict);
int      fprintf(FILE *restrict, const char *restrict, ...);
int      fputc(int, FILE *);
int      fputs(const char *restrict, FILE *restrict);
size_t   fread(void *restrict, size_t, size_t, FILE *restrict);
FILE    *freopen(const char *restrict, const char *restrict,
             FILE *restrict);
int      fscanf(FILE *restrict, const char *restrict, ...);
int      fseek(FILE *, long, int);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      fseeko(FILE *, off_t, int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
int      fsetpos(FILE *, const fpos_t *);
long     ftell(FILE *);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
off_t    ftello(FILE *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
<sup>[<a href="javascript:open_code('TSF')">TSF</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      ftrylockfile(FILE *);
void     funlockfile(FILE *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
size_t   fwrite(const void *restrict, size_t, size_t, FILE *restrict);
int      getc(FILE *);
int      getchar(void);
<sup>[<a href="javascript:open_code('TSF')">TSF</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      getc_unlocked(FILE *);
int      getchar_unlocked(void);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
char    *gets(char *);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      pclose(FILE *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
void     perror(const char *);
<sup>[<a href="javascript:open_code('CX')">CX</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
FILE    *popen(const char *, const char *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
int      printf(const char *restrict, ...);
int      putc(int, FILE *);
int      putchar(int);
<sup>[<a href="javascript:open_code('TSF')">TSF</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
int      putc_unlocked(int, FILE *);
int      putchar_unlocked(int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
int      puts(const char *);
int      remove(const char *);
int      rename(const char *, const char *);
void     rewind(FILE *);
int      scanf(const char *restrict, ...);
void     setbuf(FILE *restrict, char *restrict);
int      setvbuf(FILE *restrict, char *restrict, int, size_t);
int      snprintf(char *restrict, size_t, const char *restrict, ...);
int      sprintf(char *restrict, const char *restrict, ...);
int      sscanf(const char *restrict, const char *restrict, int ...);
<sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
char    *tempnam(const char *, const char *);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
FILE    *tmpfile(void);
char    *tmpnam(char *);
int      ungetc(int, FILE *);
int      vfprintf(FILE *restrict, const char *restrict, va_list);
int      vfscanf(FILE *restrict, const char *restrict, va_list);
int      vprintf(const char *restrict, va_list);
int      vscanf(const char *restrict, va_list);
int      vsnprintf(char *restrict, size_t, const char *restrict, va_list;
int      vsprintf(char *restrict, const char *restrict, va_list);
int      vsscanf(const char *restrict, const char *restrict, va_list arg);
</tt>
</pre>

<p><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">
Inclusion of the <i>&lt;stdio.h&gt;</i> header may also make visible all symbols from <a href=
"../basedefs/stddef.h.html"><i>&lt;stddef.h&gt;</i></a>. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></p>
</blockquote>

<hr>
<div class="box"><em>The following sections are informative.</em></div>

<h4><a name="tag_13_49_04"></a>APPLICATION USAGE</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_49_05"></a>RATIONALE</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_49_06"></a>FUTURE DIRECTIONS</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_49_07"></a>SEE ALSO</h4>

<blockquote>
<p><a href="stdarg.h.html"><i>&lt;stdarg.h&gt;</i></a> , <a href="stddef.h.html"><i>&lt;stddef.h&gt;</i></a> , <a href=
"sys/types.h.html"><i>&lt;sys/types.h&gt;</i></a> , the System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../functions/clearerr.html"><i>clearerr</i>()</a>, <a href="../functions/ctermid.html"><i>ctermid</i>()</a>, <a href=
"../functions/fclose.html"><i>fclose</i>()</a>, <a href="../functions/fdopen.html"><i>fdopen</i>()</a>, <a href=
"../functions/fgetc.html"><i>fgetc</i>()</a>, <a href="../functions/fgetpos.html"><i>fgetpos</i>()</a>, <a href=
"../functions/ferror.html"><i>ferror</i>()</a>, <a href="../functions/feof.html"><i>feof</i>()</a>, <a href=
"../functions/fflush.html"><i>fflush</i>()</a>, <a href="../functions/fgets.html"><i>fgets</i>()</a>, <a href=
"../functions/fileno.html"><i>fileno</i>()</a>, <a href="../functions/flockfile.html"><i>flockfile</i>()</a>, <a href=
"../functions/fopen.html"><i>fopen</i>()</a>, <a href="../functions/fputc.html"><i>fputc</i>()</a>, <a href=
"../functions/fputs.html"><i>fputs</i>()</a>, <a href="../functions/fread.html"><i>fread</i>()</a>, <a href=
"../functions/freopen.html"><i>freopen</i>()</a>, <a href="../functions/fseek.html"><i>fseek</i>()</a>, <a href=
"../functions/fsetpos.html"><i>fsetpos</i>()</a>, <a href="../functions/ftell.html"><i>ftell</i>()</a>, <a href=
"../functions/fwrite.html"><i>fwrite</i>()</a>, <a href="../functions/getc.html"><i>getc</i>()</a>, <a href=
"../functions/getc_unlocked.html"><i>getc_unlocked</i>()</a>, <a href="../functions/getwchar.html"><i>getwchar</i>()</a>, <a href=
"../functions/getchar.html"><i>getchar</i>()</a>, <i>getopt</i>(), <a href="../functions/gets.html"><i>gets</i>()</a>, <a href=
"../functions/pclose.html"><i>pclose</i>()</a>, <a href="../functions/perror.html"><i>perror</i>()</a>, <a href=
"../functions/popen.html"><i>popen</i>()</a>, <a href="../functions/printf.html"><i>printf</i>()</a>, <a href=
"../functions/putc.html"><i>putc</i>()</a>, <a href="../functions/putchar.html"><i>putchar</i>()</a>, <a href=
"../functions/puts.html"><i>puts</i>()</a>, <a href="../functions/putwchar.html"><i>putwchar</i>()</a>, <a href=
"../functions/remove.html"><i>remove</i>()</a>, <a href="../functions/rename.html"><i>rename</i>()</a>, <a href=
"../functions/rewind.html"><i>rewind</i>()</a>, <a href="../functions/scanf.html"><i>scanf</i>()</a>, <a href=
"../functions/setbuf.html"><i>setbuf</i>()</a>, <a href="../functions/setvbuf.html"><i>setvbuf</i>()</a>, <a href=
"../functions/sscanf.html"><i>sscanf</i>()</a>, <i>stdin</i>, <a href="../functions/system.html"><i>system</i>()</a>, <a href=
"../functions/tempnam.html"><i>tempnam</i>()</a>, <a href="../functions/tmpfile.html"><i>tmpfile</i>()</a>, <a href=
"../functions/tmpnam.html"><i>tmpnam</i>()</a>, <a href="../functions/ungetc.html"><i>ungetc</i>()</a>, <a href=
"../functions/vfscanf.html"><i>vfscanf</i>()</a>, <a href="../functions/vscanf.html"><i>vscanf</i>()</a>, <a href=
"../functions/vprintf.html"><i>vprintf</i>()</a>, <a href="../functions/vsscanf.html"><i>vsscanf</i>()</a></p>
</blockquote>

<h4><a name="tag_13_49_08"></a>CHANGE HISTORY</h4>

<blockquote>
<p>First released in Issue 1. Derived from Issue 1 of the SVID.</p>
</blockquote>

<h4><a name="tag_13_49_09"></a>Issue 5</h4>

<blockquote>
<p>The DESCRIPTION is updated for alignment with the POSIX Threads Extension.</p>

<p>Large File System extensions are added.</p>

<p>The constant L_cuserid and the external variables <i>optarg</i>, <i>opterr</i>, <i>optind</i>, and <i>optopt</i> are marked as
extensions and LEGACY.</p>

<p>The <i>cuserid</i>() and <i>getopt</i>() functions are marked LEGACY.</p>
</blockquote>

<h4><a name="tag_13_49_10"></a>Issue 6</h4>

<blockquote>
<p>The constant L_cuserid and the external variables <i>optarg</i>, <i>opterr</i>, <i>optind</i>, and <i>optopt</i> are removed as
they were previously marked LEGACY.</p>

<p>The <i>cuserid</i>(), <i>getopt</i>(), and <i>getw</i>() functions are removed as they were previously marked LEGACY.</p>

<p>Several functions are marked as part of the Thread-Safe Functions option.</p>

<p>This reference page is updated to align with the ISO/IEC&nbsp;9899:1999 standard. Note that the description of the <b>fpos_t</b>
type is now explicitly updated to exclude array types.</p>

<p>Extensions beyond the ISO&nbsp;C standard are marked.</p>
</blockquote>

<div class="box"><em>End of informative text.</em></div>

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