Cp Error Code 256
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Error Code 256 In Unix
them; it only takes a minute: Sign up Executing shell script with system() returns 256. What does that mean? up vote 8 down vote favorite 3 I've written a shell script to soft-restart HAProxy (reverse proxy). Executing the script from the shell works. But I want a daemon to execute the script. That doens't work. system() returns 256. I have error code 256 file not found no clue what that might mean. #!/bin/sh # save previous state mv /home/haproxy/haproxy.cfg /home/haproxy/haproxy.cfg.old mv /var/run/haproxy.pid /var/run/haproxy.pid.old cp /tmp/haproxy.cfg.new /home/haproxy/haproxy.cfg kill -TTOU $(cat /var/run/haproxy.pid.old) if haproxy -p /var/run/haproxy.pid -f /home/haproxy/haproxy.cfg; then kill -USR1 $(cat /var/run/haproxy.pid.old) rm -f /var/run/haproxy.pid.old exit 1 else kill -TTIN $(cat /var/run/haproxy.pid.old) rm -f /var/run/haproxy.pid mv /var/run/haproxy.pid.old /var/run/haproxy.pid mv /home/haproxy/haproxy.cfg /home/haproxy/haproxy.cfg.err mv /home/haproxy/haproxy.cfg.old /home/haproxy/haproxy.cfg exit 0 fi HAProxy is executed with user haproxy. My daemon has it's own user too. Both run with sudo. Any hints? c linux shell daemon share|improve this question asked Sep 17 '10 at 14:40 Jan Deinhard 6,7021552105 add a comment| 4 Answers 4 active oldest votes up vote 17 down vote accepted According to this and that, Perl's system() returns exit values multiplied by 256. So it's actually exiting with 1. It seems this happens in C too. share|improve this answer edited Sep 17 '10 at 14:50 answered Sep 17 '10 at 14:44 Skilldrick 42.8k23128205 1 Thanks! So it's EPERM /* Operation not permitted */ ... but why ... I start the daemon with sudo. –Jan Deinh
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Perl Error Code 256
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>ExampleComments1Catchall for general errorslet "var1 = 1/0"Miscellaneous errors, such as "divide http://tldp.org/LDP/abs/html/exitcodes.html by zero" and other impermissible operations2Misuse of shell builtins (according to Bash documentation)empty_function() {}Missing keyword or command, or permission problem (and diff return code on a failed binary file comparison).126Command invoked cannot execute/dev/nullPermission problem or command is not error code an executable127"command not found"illegal_commandPossible problem with $PATH or a typo128Invalid argument to exitexit 3.14159exit takes only integer args in the range 0 - 255 (see first footnote)128+nFatal error signal "n"kill error code 256 -9 $PPID of script$? returns 137 (128 + 9)130Script terminated by Control-CCtl-CControl-C is fatal error signal 2, (130 = 128 + 2, see above)255*Exit status out of rangeexit -1exit takes only integer args in the range 0 - 255