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e4a070a320
test_resource calls resource.setrlimit() to change the file size limits. This fails on Cygwin, which supports setrlimit() and getrlimit(), just not changing that particular setting. (The same would apply to any other platform that has those functions but not that particular feature.) Since getrlimit() works and setrlimit() can be used for other reasons, a check for ValueError was added to that part of the test.
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
import os
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import resource
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from test.test_support import TESTFN
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# This test is checking a few specific problem spots. RLIMIT_FSIZE
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# should be RLIM_INFINITY, which will be a really big number on a
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# platform with large file support. On these platforms, we need to
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# test that the get/setrlimit functions properly convert the number to
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# a C long long and that the conversion doesn't raise an error.
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try:
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cur, max = resource.getrlimit(resource.RLIMIT_FSIZE)
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except AttributeError:
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pass
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else:
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print resource.RLIM_INFINITY == max
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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# Now check to see what happens when the RLIMIT_FSIZE is small. Some
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# versions of Python were terminated by an uncaught SIGXFSZ, but
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# pythonrun.c has been fixed to ignore that exception. If so, the
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# write() should return EFBIG when the limit is exceeded.
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# At least one platform has an unlimited RLIMIT_FSIZE and attempts to
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# change it raise ValueError instead.
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try:
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max))
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limit_set = 1
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except ValueError:
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limit_set = 0
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f = open(TESTFN, "wb")
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f.write("X" * 1024)
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try:
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f.write("Y")
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f.flush()
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except IOError:
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if not limit_set:
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raise
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f.close()
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os.unlink(TESTFN)
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finally:
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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# And be sure that setrlimit is checking for really large values
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too_big = 10L**50
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (too_big, max))
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except (OverflowError, ValueError):
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pass
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (max, too_big))
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except (OverflowError, ValueError):
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pass
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