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Chet Ramey
39 lines
649 B
C
39 lines
649 B
C
#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#if defined (S_IFDIR) && !defined (S_ISDIR)
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#define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR) /* directory */
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#endif
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main(c, v)
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int c;
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char **v;
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{
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struct stat sb;
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int r, fd;
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char fbuf[32];
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r = stat("/dev/fd", &sb);
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/* test -d /dev/fd */
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if (r == -1 || S_ISDIR (sb.st_mode) == 0)
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exit (1);
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/* test -r /dev/stdin < /dev/null */
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fd = open("/dev/null", O_RDONLY, 0666);
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if (fd == -1)
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exit (2);
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if (dup2(fd, 0) == -1)
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exit (1);
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r = access("/dev/stdin", R_OK);
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if (r == -1)
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exit (1);
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exit (0);
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}
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