mirror of
https://github.com/checkpoint-restore/criu
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19 lines
464 B
Python
19 lines
464 B
Python
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# This script is used to read a single character from CRIU's status FD.
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# That way we know when the CRIU service is ready. CRIU writes a \0 to
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# the status FD.
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# In theory this could be easily done using 'read -n 1' from bash, but
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# but the bash version on Ubuntu has probably the following bug:
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# https://lists.gnu.org/archive/html/bug-bash/2017-07/msg00039.html
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import os
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import sys
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f=open(sys.argv[1])
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r = f.read(1)
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if r == '\0':
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sys.exit(0)
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sys.exit(-1)
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