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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);
int some_condition();
#define O_RDONLY 0
#define O_WRONLY 1
#define O_RDWR 2
#define STDIN 0
#define O_NOATIME 262144
void
test_1 (const char *path, void *buf)
{
int fd = open (path, O_RDWR); /* { dg-message "\\(1\\) opened here" } */
write (fd, buf, 1); /* { dg-message "\\(2\\) 'fd' could be invalid: unchecked value from \\(1\\)" } */
/* { dg-warning "'write' on possibly invalid file descriptor 'fd'" "warning" { target *-*-* } .-1 } */
close(fd);
}
void
test_2 (const char *path, void *buf)
{
int fd = open (path, O_RDWR); /* { dg-message "\\(1\\) opened here" } */
read (fd, buf, 1); /* { dg-message "\\(2\\) 'fd' could be invalid: unchecked value from \\(1\\)" } */
/* { dg-warning "'read' on possibly invalid file descriptor 'fd'" "warning" { target *-*-* } .-1 } */
close (fd);
}
void
test_3 (void *buf)
{
int fd = -1;
read (fd, buf, 1); /* { dg-warning "'read' on possibly invalid file descriptor 'fd'" } */
/* { dg-message "\\(1\\) 'fd' could be invalid" "" { target *-*-* } .-1 } */
}
void
test_4 (void *buf)
{
int fd = STDIN;
read (fd, buf, 1);
close(fd);
}
void
test_5 (char *path, void *buf)
{
int flags = O_RDONLY;
if (some_condition())
flags |= O_NOATIME;
int fd = open (path, flags); /* { dg-message "\\(1\\) opened here" } */
read (fd, buf, 1); /* { dg-warning "'read' on possibly invalid file descriptor 'fd'" } */
/* { dg-message "\\(2\\) 'fd' could be invalid" "" { target *-*-* } .-1 } */
close (fd);
}
void
test_6 (char *path, void *buf)
{
int fd = open (path, O_RDONLY);
if (fd != -1)
{
read (fd, buf, 1);
}
close (fd);
}
void
test_7 (char *path, void *buf)
{
int fd = open (path, O_RDWR); /* { dg-message "\\(1\\) opened here" } */
if (fd != -1) /* { dg-message "\\(2\\) assuming 'fd' is an invalid file descriptor \\(< 0\\)" } */
{
read (fd, buf, 1);
} else
{
write (fd, buf, 1); /* { dg-warning "'write' on possibly invalid file descriptor 'fd'" } */
}
close(fd);
}
void
test_read_from_symbolic_fd (int fd, void *buf)
{
read (fd, buf, 1);
}
void
test_write_to_symbolic_fd (int fd, void *buf)
{
write (fd, buf, 1);
}
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