fwrite

I have a short C program that writes into a file until there is no more space on disk: #include <stdio.h> int main(void) { char c[] = "abcdefghij"; size_t rez; FILE *f = fopen("filldisk.dat", "wb"); while (1) { rez = fwrite(c, 1, sizeof(c), f); if (!rez) break; } fclose(f); return 0; } When I run the program (in Linux), it stops when the file reaches 2GB. Is there an internal limitation, due to the FILE structure, or something? Thanks. On a 32 bits system (i.e. the OS is 32 bits), by default, fopen and co are limited to 32 bits size/offset/etc... You need to enable the large file support, or

I have the following test script: <?php $myFile = "testFile.txt"; $fh = fopen($myFile, 'w') or die("can't open file"); $stringData = "Floppy Jalopy\n"; fwrite($fh, $stringData); $stringData = "Pointy Pinto\n"; fwrite($fh, $stringData); fclose($fh); ?> when run however and opened usign Notepad, the data is returned in a single line without breaks as: Floppy Jalopy(crazy box)Pointy Pinto(crazy box) where i cant find the appropriate character for 'crazy box' but its a REALLY crazy box. WHAT GIVES! If you want to open the file in Windows notepad, you must use Windows line breaks: \r\n It is best

What is the best way to overwrite a specific line in a file? I basically want to search a file for the string '@parsethis' and overwrite the rest of that line with something else. If the file isn't too big, the best way would probably be to read the file into an array of lines with file() , search through the array of lines for your string and edit that line, then implode() the array back together and fwrite() it back to the file. Stefan Gehrig If the file is really big (log files or something like this) and you are willing to sacrifice speed for memory consumption you could open two files and

.... finalize(char *hdrs, sendip_data *headers[], int index, sendip_data *data, sendip_data *pack) { ........ For debugging purposes I want a hex dump of the data and pack structures, which are of type sendip_data , a really complex structure. Actually they contain some binary information so I am not sure whether output of my project is correct or not. So for debugging purposes, I want to write the data into a file so that I can use hexdump as follows - $hexdump -C file.txt Also as this is a run time generation of a n/w packet so I am also not sure about the length of data and pack structure

I'm working on a mailbox project, and I have these two structures: struct mmbox_mail struct mmbox_mail { char *sender, *recipient; char *obj, *date; char flags; size_t size; }; and mail_t typedef struct{ struct mmbox_mail info; void *body; void *next; } mail_t; I cannot modify the structures' fields, because I need variable data (for this purpose I used char* instead of char[]). Each mail_t structure is a mail. I need to save every mail of a user in a file, that could be binary or text file (but I think it's better with a binary file, because I have the void* body that is difficult to save in

I'm working on a simple file splitter/merger program in the C programming language. The problem is, for some reason fopen returns NULL, and because of that, my program is crashing at the fwrite statement. How do I fix this? Here is the C file: int SplitFile(char* filename, char* output, size_t size) { char current_file_name[256]; int file_count = 0, i = 0; FILE *file = fopen( filename, "rb" ); printf("split %s into chunks of %d named\n", filename, size); if (!file) return E_BAD_SOURCE; else { output = (char *) malloc(size * sizeof(char)); if (output == NULL) return E_NO_MEMORY; else { int