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- Previous: <a href="Stubs.html#Stubs" accesskey="p" rel="prev">Stubs</a>, Up: <a href="Syscalls.html#Syscalls" accesskey="u" rel="up">Syscalls</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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- <a name="Reentrant-covers-for-OS-subroutines"></a>
- <h3 class="section">13.2 Reentrant covers for OS subroutines</h3>
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- <p>Since the system subroutines are used by other library routines that
- require reentrancy, <samp>libc.a</samp> provides cover routines (for example,
- the reentrant version of <code>fork</code> is <code>_fork_r</code>). These cover
- routines are consistent with the other reentrant subroutines in this
- library, and achieve reentrancy by using a reserved global data block
- (see <a href="Reentrancy.html#Reentrancy">Reentrancy</a>).
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- <tr><td align="left" valign="top">• <a href="_005fclose_005fr.html#g_t_005fclose_005fr" accesskey="1">_close_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of close
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fexecve_005fr.html#g_t_005fexecve_005fr" accesskey="2">_execve_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of execve
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005ffork_005fr.html#g_t_005ffork_005fr" accesskey="3">_fork_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of fork
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005ffstat_005fr.html#g_t_005ffstat_005fr" accesskey="4">_fstat_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of fstat
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fgetpid_005fr.html#g_t_005fgetpid_005fr" accesskey="5">_getpid_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of getpid
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fkill_005fr.html#g_t_005fkill_005fr" accesskey="6">_kill_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of kill
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005flink_005fr.html#g_t_005flink_005fr" accesskey="7">_link_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of link
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005flseek_005fr.html#g_t_005flseek_005fr" accesskey="8">_lseek_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of lseek
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fopen_005fr.html#g_t_005fopen_005fr" accesskey="9">_open_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of open
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fread_005fr.html#g_t_005fread_005fr">_read_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of read
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fsbrk_005fr.html#g_t_005fsbrk_005fr">_sbrk_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of sbrk
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fstat_005fr.html#g_t_005fstat_005fr">_stat_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of stat
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005ftimes_005fr.html#g_t_005ftimes_005fr">_times_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of times
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005funlink_005fr.html#g_t_005funlink_005fr">_unlink_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of unlink
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fwait_005fr.html#g_t_005fwait_005fr">_wait_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of wait
- </td></tr>
- <tr><td align="left" valign="top">• <a href="_005fwrite_005fr.html#g_t_005fwrite_005fr">_write_r</a>:</td><td> </td><td align="left" valign="top">Reentrant version of write
- </td></tr>
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