fclose

fclose() causing segmentation fault

由 折月煮酒 提交于 2019-12-17 14:31:09
问题 I have a tab-delimited text file that I am parsing. Its first column contains strings of the format chrX , where X denotes a set of strings, e.g., "1", "2", ..., "X", "Y". These are each stored in a char* called chromosome , as the file is parsed. The text file is sorted on the first column lexicographically, i.e., I will have a number of rows starting with "chr1", and then "chr2", etc. At each "chrX" entry, I need to open another file that is associated with this entry: FILE *merbaseIn; //

fclose() causing segmentation fault

由 北城以北 提交于 2019-12-17 14:30:52
问题 I have a tab-delimited text file that I am parsing. Its first column contains strings of the format chrX , where X denotes a set of strings, e.g., "1", "2", ..., "X", "Y". These are each stored in a char* called chromosome , as the file is parsed. The text file is sorted on the first column lexicographically, i.e., I will have a number of rows starting with "chr1", and then "chr2", etc. At each "chrX" entry, I need to open another file that is associated with this entry: FILE *merbaseIn; //

What happens if I don't call fclose() in a C program?

由 孤人 提交于 2019-12-17 03:32:31
问题 Firstly, I'm aware that opening a file with fopen() and not closing it is horribly irresponsible, and bad form. This is just sheer curiosity, so please humour me :) I know that if a C program opens a bunch of files and never closes any of them, eventually fopen() will start failing. Are there any other side effects that could cause problems outside the code itself? For instance, if I have a program that opens one file, and then exits without closing it, could that cause a problem for the

Working with Text Files Two

由 回眸只為那壹抹淺笑 提交于 2019-12-13 08:19:36
问题 A couple of questions really about the code below from which I gained assistance in a previous post. 1). Any ideas why at the end of the ouput, I get a random garbage character printed? I am freeing the files etc and checking for EOF. 2). The idea is that it can work with multiple file arguements, so I want to create new file names which increment, i.e. out[i].txt, is that possible in C? The code itself takes a file containing words all separated by spaces, like a book for example, then loops

While writing into a file , Where intermediate data stored in between fopen() and fclose()?

由 血红的双手。 提交于 2019-12-11 08:55:17
问题 Below is a small program which takes information from user and write it into a file teacher.txt . I am using only one array q2[30] for taking input and writing into a file using fprintf() . But when i want to enter more teacher then again loop will execute but at this time fclose() will not appear so data will not be write/save(don't know) into file also previous value of q2 get erased/overwrite with new input. So in this case where data is stored/write by fprintf() .Because when i manually

open versus fopen in C program (with multi-threading)

由 夙愿已清 提交于 2019-12-11 05:47:43
问题 For an unknown reason, it seems that fopen fails to open text files when it is called repeated times before closing. My C program uses multithreading, and each thread handles one type of output text files (eleven per type), each type in a separated folder. I need to mantain these files opened during a long execution and at the same thread in order to write a lot of data. To explain it better, the process is the following: 1- Thread #1 starts and creates and writes 11 files in one folder. 2-

Saving file into new directory using fwrite

由 不羁岁月 提交于 2019-12-10 11:18:48
问题 I have a simple PHP script that writes a file into directory where located, but need to have it written into a directory called "temp". There are many answers here on the subject, but can't seem to find what I need. Have reviewedhttp://us2.php.net/manual/en/function.fwrite.php with no luck. Here is the basic PHP without the form part: <?php function saveFile($filename,$filecontent){ if (strlen($filename)>0){ $file = @fopen($filename,"w"); if ($file != false){ fwrite($file,$filecontent);

Saving file into new directory using fwrite

由 百般思念 提交于 2019-12-06 14:17:32
I have a simple PHP script that writes a file into directory where located, but need to have it written into a directory called "temp". There are many answers here on the subject, but can't seem to find what I need. Have reviewedhttp://us2.php.net/manual/en/function.fwrite.php with no luck. Here is the basic PHP without the form part: <?php function saveFile($filename,$filecontent){ if (strlen($filename)>0){ $file = @fopen($filename,"w"); if ($file != false){ fwrite($file,$filecontent); fclose($file); return 1; } return -2; } return -1; } ?> This appears below the /form tag: <?php if (isset($

Reset a TCP socket connection from application

由 雨燕双飞 提交于 2019-12-06 13:55:25
问题 How to reset an accept ed socket in application level either with IO::Socket::INET in perl or in C? There is a programm bind ing, listen ing on a TCP port, and accept s a client connection, after that it read s and write s some data. If I simply close or shutdown the socket, TCP layer gracefully terminates (with FIN packet), rather than, I'd generate an RST packet. 回答1: You didn't specify the exact OS you are using. I found that Linux does have an API call which will reset a TCP connection, I

Reset a TCP socket connection from application

由 可紊 提交于 2019-12-04 21:20:17
How to reset an accept ed socket in application level either with IO::Socket::INET in perl or in C? There is a programm bind ing, listen ing on a TCP port, and accept s a client connection, after that it read s and write s some data. If I simply close or shutdown the socket, TCP layer gracefully terminates (with FIN packet), rather than, I'd generate an RST packet. You didn't specify the exact OS you are using. I found that Linux does have an API call which will reset a TCP connection, I have no idea how portable it is. The way to do it is to use the connect system call on the already
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