diff options
Diffstat (limited to 'libio/iopopen.c')
| -rw-r--r-- | libio/iopopen.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/libio/iopopen.c b/libio/iopopen.c index 65337f8f28..a03cf636b2 100644 --- a/libio/iopopen.c +++ b/libio/iopopen.c @@ -98,18 +98,23 @@ _IO_proc_open (fp, command, mode) return NULL; if (_IO_pipe (pipe_fds) < 0) return NULL; - if (mode[0] == 'r') + if (mode[0] == 'r' && mode[1] == '\0') { parent_end = pipe_fds[0]; child_end = pipe_fds[1]; read_or_write = _IO_NO_WRITES; } - else + else if (mode[0] == 'w' && mode[1] == '\0') { parent_end = pipe_fds[1]; child_end = pipe_fds[0]; read_or_write = _IO_NO_READS; } + else + { + __set_errno (EINVAL); + return NULL; + } ((_IO_proc_file *) fp)->pid = child_pid = _IO_fork (); if (child_pid == 0) { |