Re: trouble with system calls

hello, Please enlighten me about what could be wrong with the following :

chdir("/home/code/"); 
system("svm_classify zkereigenout.dat svmmodel.mod"); 

open(IN,"<svm_predictions");
@values = <IN>;
close(IN);
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svm_classify is a program that produces an output file named svm_predictions. after my system call, i want to read the content of svm_predictions and assign it to the array named values. however, when I check the directory, svm_predictions does not exist... I made sure that the directory has the right permissions...thanks a lot! _{janitored by ybiC: Reparented this (originally root) node into prior thread on same topic/question by same OP, and retitled accordingly}

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Re: (2) trouble with system calls by Zaxo (Archbishop) on Feb 10, 2004 at 07:56 UTC
Try it with `use Cwd 'chdir'; #...` [download] That will make chdir's effect be felt in your environment, where a shell is likely to look for the base for relative paths. You may find your missing 'svm_predictions' in your original start directory. Update: ysth++ spotted a typo in code. Corrected. After Compline, Zaxo	[reply] [d/l]
Re: (2) trouble with system calls by borisz (Canon) on Feb 10, 2004 at 09:39 UTC
Perhaps svm_classify is not found. Try `system("svm_classify zkereigenout.dat svmmodel.mod") == 0 or die "$? $ +!";` [download] Boris	[reply] [d/l]
Re: (2) trouble with system calls by chimni (Pilgrim) on Feb 10, 2004 at 10:19 UTC
Are you running the script from the same directory as svm_classify If not maybe svm_classify cannot be found echo $PATH ,should tell you what all is included else use the full path of the program. It would be a good idea to use die as above in order to get an error message: does it say cannot find file or some such. HTH, chimni	[reply]