| 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); |
| |
| #define O_RDONLY 0 |
| #define O_WRONLY 1 |
| #define O_RDWR 2 |
| |
| 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); |
| } |