67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
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/* POSIX fpathconf (Sec. 5.7.1) Author: Andy Tanenbaum */
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#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <limits.h>
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#include <unistd.h>
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#include <termios.h>
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#ifdef __weak_alias
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__weak_alias(fpathconf, _fpathconf)
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#endif
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PUBLIC long fpathconf(fd, name)
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int fd; /* file descriptor being interrogated */
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int name; /* property being inspected */
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{
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/* POSIX allows some of the values in <limits.h> to be increased at
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* run time. The pathconf and fpathconf functions allow these values
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* to be checked at run time. MINIX does not use this facility.
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* The run-time limits are those given in <limits.h>.
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*/
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struct stat stbuf;
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switch(name) {
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case _PC_LINK_MAX:
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/* Fstat the file. If that fails, return -1. */
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if (fstat(fd, &stbuf) != 0) return(-1);
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if (S_ISDIR(stbuf.st_mode))
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return(1L); /* no links to directories */
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else
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return( (long) LINK_MAX);
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case _PC_MAX_CANON:
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return( (long) MAX_CANON);
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case _PC_MAX_INPUT:
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return( (long) MAX_INPUT);
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case _PC_NAME_MAX:
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return( (long) NAME_MAX);
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case _PC_PATH_MAX:
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return( (long) PATH_MAX);
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case _PC_PIPE_BUF:
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return( (long) PIPE_BUF);
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case _PC_CHOWN_RESTRICTED:
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return( (long) _POSIX_CHOWN_RESTRICTED);
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case _PC_NO_TRUNC:
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return( (long) _POSIX_NO_TRUNC);
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case _PC_VDISABLE:
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return( (long) _POSIX_VDISABLE);
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default:
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errno = EINVAL;
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return(-1);
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}
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}
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