40 lines
822 B
Python
40 lines
822 B
Python
import ffi
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libc = ffi.open("libc.so.6")
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print("libc:", libc)
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print()
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# Declare few functions
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perror = libc.func("v", "perror", ["s"])
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time = libc.func("i", "time", "p")
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open = libc.func("i", "open", ["s", "i"])
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qsort = libc.func("v", "qsort", "piip")
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# And one variable
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errno = libc.var("i", "errno")
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print("time:", time)
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print("UNIX time is:", time(None))
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print()
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perror("ffi before error")
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open("somethingnonexistent__", 0)
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print(errno)
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print(errno.get())
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perror("ffi after error")
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print()
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def cmp(pa, pb):
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a = ffi.as_bytearray(pa, 1)
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b = ffi.as_bytearray(pb, 1)
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print("cmp:", a, b)
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return a[0] - b[0]
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cmp_c = ffi.callback("i", cmp, "pp")
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print("callback:", cmp_c)
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# TODO: violates Py semantics, pass bytearray
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s = "foobar"
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print("org string:", s)
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qsort(s, len(s), 1, cmp_c)
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print("qsort'ed:", s)
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