Dos Error 255
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this stupid thing I'm trying to delete a folder found in the start menu of each user profile by running this command line in a .bat script cd "c:\documents and settings"for /f "delims=" %i in ('dir /ad/s/b') do rmdir /S /Q "%i\Kurzweil Educational Systems"exit I know it's dos error code 1 ugly but it works... locally or via psexec, it deletes all the folders "Kurzweil Educational Systems" under "c:\documents and settings" but not through SCCM I'm running the .bat via a "download and run locally" advertisement, so I don't think the%~dp0 is needed and anyway I'm not sure where to put it in the command. I'm getting a 255 error in the execmgr.log t in Admin context execmgr 30/03/12 10:10:23 3364 (0x0D24) Execution Request for package 00A00180 program Uninstall&DeleteKurzweilV10 state change from NotExist to NotifyExecution execmgr 30/03/12 10:10:24 3364 (0x0D24) Checking content location C:\WINDOWS\system32\CCM\Cache\00A00180.13.System for use execmgr 30/03/12 10:10:24 3364 (0x0D24) Successfully selected content location C:\WINDOWS\system32\CCM\Cache\00A00180.13.System execmgr 30/03/12 10:10:24 3364 (0x0D24) GetFileVersionInfoSize failed for file C:\WINDOWS\system32\CCM\Cache\00A00180.13.System\Uninstall_DeleteV10.bat, error 1812 execmgr 30/03/12 10:10:24 3364 (0x0D24) Executing program as a script execmgr 30/03/12 10:10:24 3364 (0x0D24) Successfully prepared command line "C:\WINDOWS\system32\CCM\
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them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Why do I get error 255 when returning -1 https://social.technet.microsoft.com/Forums/systemcenter/en-US/5bfcdd6e-577b-49d7-974b-ce16ad84c2c5/error-255-running-a-bat-with-a-loop-for-f-?forum=configmgrgeneral up vote 6 down vote favorite 1 I'm new into C++ programming and I have a very basic question. I've noticed that when I return -1 in C++ program and then check the exit status, I get 255. Why is that? The code is the most basic: int main() { return -1; } Then, after running the compiled code: echo $? 255 shell exit share|improve this question edited May 4 '12 at 23:19 Gilles 370k686731123 asked May 4 '12 at http://unix.stackexchange.com/questions/37915/why-do-i-get-error-255-when-returning-1 16:34 Eugene S 1,29771827 add a comment| 2 Answers 2 active oldest votes up vote 14 down vote accepted Because in UNIX/POSIX, the exit code of a program is defined to be an unsigned 8-bit value. Converting -1 to unsigned 8-bit gives 255. Edit to add: To give more detail: the wait*() family of system calls in UNIX encode the result of a process into a single 32bit integer. The 32 bits of that result are further broken up to provide information such as whether the process dumped core, exited due to a signal (and which one), etc. Of that 32 bits, only 8 are reserved for the exit code of the process and those are interpreted as an unsigned value. The fork/exec/wait model of UNIX/POSIX is one of its very oldest and most deeply embedded features; if you were designing a new operating system today you might do something different (at least use 64 bits :-)). On the other hand, practically speaking is it really useful to have >255 exit codes? I doubt it. If you really wanted something more powerful I'd suggest that you'd switch to an "exit string", instead of a numeric exit code with a wider range. share|improve this answer edited May 4 '12 at 16:55 answered May 4 '12 at 16:45 MadScientist 1,473816 Nice edit. Thanks for that additional information. –George M May 4 '12 at 17:06 Thank yo
task. Batch file decisions may be made based on what code was generated. This webpage gives a short discussion of these codes and ways in http://www.chebucto.ns.ca/~ak621/DOS/ExitCode.html which they might be used. Deep detail will not be gone into. If you want to know more, see your DOS manual and/or the On-Screen Help. Be aware that not everything presented here may work as shown for the commands included with the version or manufacturer of DOS you have. INFORMATION BELOW MAY NOT BE REPRODUCED WITHOUT PERMISSION FROM THE AUTHOR © What are Exit Codes? When DOS or dos error its software finishes a command operation, it usually generates a code upon exiting. When it gives that exit code, it is essentially saying: Here are the results of my work. Since these are generated after a command has finished and exited, they are known as "Exit Codes". These codes are hidden from the user but may be tested for via various methods. The codes give the computer system an dos error 5 idea of what happened during an operation or after it has completed. One code might signal that the task ended with no errors, or that it ended with no errors but that the operation was not successful. If an error did occur, a code might be generated depending on what the error was. Why Might I Want to Use Exit Codes? Since these codes can indicate what happened during a computer operation, they can be used in a batch file to tailor the direction of further procedures. So as an example, if one used the "FC" (File Compare) command and the outcome was that two files matched, a further procedure could be that the batch file be directed to delete one of the duplicate files. Another example of this is given farther on. (See this website's Batch File Tutorial for information on writing batch files.) What do Exit Codes Look Like? Each is one of 256 available values represented by a number from 0 (zero) through 255. `0' typically represents an operation that was completed with no errors. Other numbers might represent problems or various results. Note that not all available numbers will typically be used by a program. In fact, I know of only a few com