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...
Calling fclose() here after dup()ing its file descriptor blocks until the child process has ended (presumably because the stream has ended). FILE *f = popen("./output", "r"); int d = dup(fileno(f)); fclose(f); However by manually performing the pipe(), fork(), execvp() of the popen(), and then dup()ing the pipe's read file descriptor,...
I have a multithreaded application that is opening and reading the same file (not writing). I am opening a different file descriptor for each thread (but they all point to the same file). Each thread then reads the file and may close it and open it again if EOF is reached. Is this ok? If I perform fclose() on a file descriptor does it af...
Whenever I run my program with fclose(outputFile); at the very end, I get an error. glibc detected...corrupted double-linked list The confusing thing about this though, is that I have fclose(inputFile); directly above it and it works fine. Any suggestions? FILE* inputFile = fopen(fileName, "r"); if (inputFile == NULL) { printf("in...
What will happen if fwrite & fclose are called in parallel from two threads for the same file descriptor? ...
My code is hanging fwrite with the following stack: libc.so.6.1::___lll_lock_wait libc.so.6.1::fwrite This seems to be happening in solaris. Only incorrect thing which I can think of is that my code may try to do a parallel fclose on the same FILE pointer which is used for doing fwrite. If a parallel fclose happens will it lead to th...