xref: /minix3/minix/lib/libc/sys/pathconf.c (revision 433d6423c39e34ec4b79c950597bb2d236f886be)
1*433d6423SLionel Sambuc /* POSIX pathconf (Sec. 5.7.1) 		Author: Andy Tanenbaum */
2*433d6423SLionel Sambuc 
3*433d6423SLionel Sambuc #include <sys/cdefs.h>
4*433d6423SLionel Sambuc #include "namespace.h"
5*433d6423SLionel Sambuc #include <lib.h>
6*433d6423SLionel Sambuc 
7*433d6423SLionel Sambuc #include <fcntl.h>
8*433d6423SLionel Sambuc #include <errno.h>
9*433d6423SLionel Sambuc #include <unistd.h>
10*433d6423SLionel Sambuc 
pathconf(path,name)11*433d6423SLionel Sambuc long pathconf(path, name)
12*433d6423SLionel Sambuc const char *path;		/* name of file being interrogated */
13*433d6423SLionel Sambuc int name;			/* property being inspected */
14*433d6423SLionel Sambuc {
15*433d6423SLionel Sambuc /* POSIX allows some of the values in <limits.h> to be increased at
16*433d6423SLionel Sambuc  * run time.  The pathconf and fpathconf functions allow these values
17*433d6423SLionel Sambuc  * to be checked at run time.  MINIX does not use this facility.
18*433d6423SLionel Sambuc  * The run-time limits are those given in <limits.h>.
19*433d6423SLionel Sambuc  */
20*433d6423SLionel Sambuc 
21*433d6423SLionel Sambuc   int fd;
22*433d6423SLionel Sambuc   long val;
23*433d6423SLionel Sambuc 
24*433d6423SLionel Sambuc   if ( (fd = open(path, O_RDONLY)) < 0) return(-1L);
25*433d6423SLionel Sambuc   val = fpathconf(fd, name);
26*433d6423SLionel Sambuc   close(fd);
27*433d6423SLionel Sambuc   return(val);
28*433d6423SLionel Sambuc }
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