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int open(const char *, int mode);
void close(int fd);
int write (int fd, void *buf, int nbytes);
int read (int fd, void *buf, int nbytes);
/* Example of these flags as an enum, and with
non-standard values for them. */
enum {
O_RDONLY = 0x10,
O_WRONLY = 0x20,
O_RDWR = 0x40,
O_ACCMODE = 0xf0
};
void f (int fd) __attribute__((fd_arg(1))); /* { dg-message "argument 1 of 'f' must be an open file descriptor, due to '__attribute__\\(\\(fd_arg\\(1\\)\\)\\)'" } */
void
test_1 (const char *path)
{
int fd = open (path, O_RDWR);
close(fd);
f(fd); /* { dg-warning "'f' on closed file descriptor 'fd'" } */
/* { dg-message "\\(3\\) 'f' on closed file descriptor 'fd'; 'close' was at \\(2\\)" "" { target *-*-* } .-1 } */
}
void g (int fd) __attribute__((fd_arg_read(1))); /* { dg-message "argument 1 of 'g' must be a readable file descriptor, due to '__attribute__\\(\\(fd_arg_read\\(1\\)\\)\\)'" } */
void
test_2 (const char *path)
{
int fd = open (path, O_WRONLY);
if (fd != -1)
{
g (fd); /* { dg-warning "'g' on write-only file descriptor 'fd'" } */
}
close (fd);
}
void h (int fd) __attribute__((fd_arg_write(1))); /* { dg-message "argument 1 of 'h' must be a writable file descriptor, due to '__attribute__\\(\\(fd_arg_write\\(1\\)\\)\\)'" } */
void
test_3 (const char *path)
{
int fd = open (path, O_RDONLY);
if (fd != -1)
{
h (fd); /* { dg-warning "'h' on read-only file descriptor 'fd'" } */
}
close(fd);
}
void ff (int fd) __attribute__((fd_arg(1))); /* { dg-message "argument 1 of 'ff' must be an open file descriptor, due to '__attribute__\\(\\(fd_arg\\(1\\)\\)\\)'" } */
void test_4 (const char *path)
{
int fd = open (path, O_RDWR);
ff (fd); /* { dg-warning "'ff' on possibly invalid file descriptor 'fd'" } */
close(fd);
}
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