bigfile - errx(1, "Usage: bigfile <filename>...

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/* * Create a large file in small increments. * * Should work on emufs (emu0:) once the basic system calls are done, * and should work on SFS when the file system assignment is * done. Sufficiently small files should work on SFS even before that * assignment. */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <err.h> static char buffer[100]; int main(int argc, char *argv[]) { const char *filename; int i, size; int fileid; int len; if (argc != 3) {
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Unformatted text preview: errx(1, "Usage: bigfile <filename> <size>"); } filename = argv[1]; size = atoi(argv[2]); printf("Creating a file of size %d\n", size); fileid = open(filename, O_WRONLY|O_CREAT|O_TRUNC); if (fileid < 0) { err(1, "%s: create", filename); } i=0; while (i<size) { snprintf(buffer, sizeof(buffer), "%-10d", i); len = write(fileid, buffer, strlen(buffer)); if (len<0) { err(1, "%s: write", filename); } i += len; } close(fileid); return 0; }...
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This note was uploaded on 11/10/2009 for the course CS 536 taught by Professor Lums during the Spring '09 term at Indiana.

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