diff options
| -rw-r--r-- | src/unistd/ttyname_r.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/unistd/ttyname_r.c b/src/unistd/ttyname_r.c index 8bac7b2f..a38ba4f2 100644 --- a/src/unistd/ttyname_r.c +++ b/src/unistd/ttyname_r.c @@ -1,10 +1,12 @@ #include <unistd.h> #include <errno.h> +#include <sys/stat.h> void __procfdname(char *, unsigned); int ttyname_r(int fd, char *name, size_t size) { + struct stat st1, st2; char procname[sizeof "/proc/self/fd/" + 3*sizeof(int) + 2]; ssize_t l; @@ -15,8 +17,13 @@ int ttyname_r(int fd, char *name, size_t size) if (l < 0) return errno; else if (l == size) return ERANGE; - else { - name[l] = 0; - return 0; - } + + name[l] = 0; + + if (stat(name, &st1) || fstat(fd, &st2)) + return errno; + if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) + return ENOENT; + + return 0; } |