<TITLE>pathconf</TITLE> <body bgcolor="#ffffcc"> <hr> <pre> <h3>FPATHCONF(3) Linux Programmer's Manual FPATHCONF(3) </h3> <h3>NAME </h3> fpathconf, pathconf - get configuration values for files <h3>SYNOPSIS </h3> #include <unistd.h> long fpathconf(int filedes, int name); long pathconf(char *path, int name); <h3>DESCRIPTION </h3> fpathconf() gets a value for the configuration option name for the open file descriptor filedes. pathconf() gets a value for configuration option name for the file name path. The corresponding macros defined in <unistd.h> minimum values; if an application wants to take advantage of val- ues which may change, a call to fpathconf() or pathconf() can be made, which may yield more liberal results. Setting name equal to one of the following constants returns the following configuration options: _PC_LINK_MAX returns the maximum number of links to the file. If filedes or path refer to a directory, then the value applies to the whole directory. The corre- sponding macro is _POSIX_LINK_MAX. _PC_MAX_CANON returns the maximum length of a formatted input line, where filedes or path must refer to a termi- nal. The corresponding macro is _POSIX_MAX_CANON. _PC_MAX_INPUT returns the maximum length of an input line, where filedes or path must refer to a terminal. The cor- responding macro is _POSIX_MAX_INPUT. _PC_NAME_MAX returns the maximum length of a filename in the directory path or filedes. the process is allowed to create. _POSIX_MAX_. _PC_PATH_MAX returns the maximum length of a relative pathname when path or filedes is the current working direc- tory. The corresponding macro is _POSIX_PATH_MAX. _PC_PIPE_BUF returns the size of the pipe buffer, where filedes must refer to a pipe or FIFO and path must refer to a FIFO. The corresponding macro is _POSIX_PIPE_BUF. <h3>GNU April 4, 1993 1 </h3> <h3>FPATHCONF(3) Linux Programmer's Manual FPATHCONF(3) </h3> _PC_CHOWN_RESTRICTED returns nonzero if the chown(2) call may not be used on this file. If filedes or path refer to a directory, then this applies to all files in that directory. The corresponding macro is _POSIX_CHOWN_RESTRICTED. _PC_NO_TRUNC returns nonzero if accessing filenames longer than _POSIX_NAME_MAX generates an error. The corre- sponding macro is _POSIX_NO_TRUNC. _PC_VDISABLE returns nonzero if special character processing can be disabled, where filedes or path must refer to a terminal. <h3>RETURN VALUE </h3> The limit is returned, if one exists. If the system does not have a limit for the requested resource, -1 is returned, and errno is unchanged. If there is an error, -1 is returned, and errno is set to reflect the nature of the error. <h3>CONFORMS TO </h3> POSIX.1 Files with name lengths longer than the value returned for name equal to _PC_NAME_MAX may exist in the given directory. Some returned values may be huge; they are not suitable for allocating memory. </pre> <hr> <h3>SEE ALSO </h3><p> <a href=getconf.htm>getconf</a>, <a href=statfs.htm>statfs</a>, <a href=open.htm>open</a>, <a href=sysconf.htm>sysconf</a>, <pre> <h3>GNU April 4, 1993 2 </h3> </pre> <P> <hr> <p> <center> <table border=2 width=80%> <tr align=center> <td width=25%> <a href=../index.htm>Top</a> </td><td width=25%> <a href=../master_index.html>Master Index</a> </td><td width=25%> <a href=../SYNTAX/keywords.html>Keywords</a> </td><td width=25%> <a href=../FUNCTIONS/index.htm>Functions</a> </td> </tr> </table> </center> <p> <hr> This manual page was brought to you by <i>mjl_man V-2.0</i>
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