2 new tools: display-{fpathconf.maxcanon}.py

tests/test_maxcanon.py has been deleted and turned into
an "autodetection" tool of sorts, no longer attempting
to assert exacting values, but determine it programmatically.

1 files changed, 41 insertions, 0 deletions

diff --git a/tools/display-fpathconf.py b/tools/display-fpathconf.py
new file mode 100644
index 0000000..d40cbae
--- /dev/null
+++ b/tools/display-fpathconf.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+"""Displays os.fpathconf values related to terminals. """
+from __future__ import print_function
+import sys
+import os
+
+
+def display_fpathconf():
+    DISP_VALUES = (
+        ('PC_MAX_CANON', ('Max no. of bytes in a '
+                          'terminal canonical input line.')),
+        ('PC_MAX_INPUT', ('Max no. of bytes for which '
+                          'space is available in a terminal input queue.')),
+        ('PC_PIPE_BUF', ('Max no. of bytes which will '
+                         'be written atomically to a pipe.')),
+        ('PC_VDISABLE', 'Terminal character disabling value.')
+    )
+    FMT = '{name:<13} {value:<5} {description}'
+
+    # column header
+    print(FMT.format(name='name', value='value', description='description'))
+    print(FMT.format(name=('-' * 13), value=('-' * 5), description=('-' * 11)))
+
+    fd = sys.stdin.fileno()
+    for name, description in DISP_VALUES:
+        key = os.pathconf_names.get(name, None)
+        if key is None:
+            value = 'UNDEF'
+        else:
+            try:
+                value = os.fpathconf(fd, name)
+            except OSError as err:
+                value = 'OSErrno {0.errno}'.format(err)
+        if name == 'PC_VDISABLE':
+            value = hex(value)
+        print(FMT.format(name=name, value=value, description=description))
+    print()
+
+
+if __name__ == '__main__':
+    display_fpathconf()