[thirdparty/bash.git] / CWRU / devstdin.c

#include <unistd.h>

#include <sys/types.h>
#include <sys/stat.h>

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>

#if defined (S_IFDIR) && !defined (S_ISDIR)
#define S_ISDIR(m)      (((m)&S_IFMT) == S_IFDIR)       /* directory */
#endif

main(c, v)
int	c;
char	**v;
{
	struct stat 	sb;
	int	r, fd;
	char	fbuf[32];

	r = stat("/dev/fd", &sb);
	/* test -d /dev/fd */
	if (r == -1 || S_ISDIR (sb.st_mode) == 0)
		exit (1);
	/* test -r /dev/stdin < /dev/null */
	fd = open("/dev/null", O_RDONLY, 0666);
	if (fd == -1)
		exit (2);
	if (dup2(fd, 0) == -1)
		exit (1);
	r = access("/dev/stdin", R_OK);
	if (r == -1)
		exit (1);
	exit (0);
}
Commit	Line	Data
2569d6d5 CR	1	#include <unistd.h>
	2
	3	#include <sys/types.h>
	4	#include <sys/stat.h>
	5
	6	#include <fcntl.h>
	7	#include <stdio.h>
	8	#include <stdlib.h>
	9
	10	#if defined (S_IFDIR) && !defined (S_ISDIR)
	11	#define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR) /* directory */
	12	#endif
	13
	14	main(c, v)
	15	int c;
	16	char **v;
	17	{
	18	struct stat sb;
	19	int r, fd;
	20	char fbuf[32];
	21
	22	r = stat("/dev/fd", &sb);
	23	/* test -d /dev/fd */
	24	if (r == -1 \|\| S_ISDIR (sb.st_mode) == 0)
	25	exit (1);
	26	/* test -r /dev/stdin < /dev/null */
	27	fd = open("/dev/null", O_RDONLY, 0666);
	28	if (fd == -1)
	29	exit (2);
	30	if (dup2(fd, 0) == -1)
	31	exit (1);
	32	r = access("/dev/stdin", R_OK);
	33	if (r == -1)
	34	exit (1);
	35	exit (0);
	36	}
	37
	38