static int get_process_array(char * page, int pid, int type) { switch (type) { case PROC_PID_STATUS: return get_status(pid, page); case PROC_PID_ENVIRON: return get_env(pid, page); case PROC_PID_CMDLINE: return get_arg(pid, page); case PROC_PID_STAT: return get_stat(pid, page); case PROC_PID_STATM: return get_statm(pid, page); } return -EBADF; }
static int array_read(struct inode * inode, struct file * file,char * buf, int count) { char * page; int length; int end; unsigned int type, pid; if (count < 0) return -EINVAL; if (!(page = (char*) __get_free_page(GFP_KERNEL))) return -ENOMEM; type = inode->i_ino; pid = type >> 16; type &= 0x0000ffff; switch (type) { case 2: length = get_loadavg(page); break; case 3: length = get_uptime(page); break; case 4: length = get_meminfo(page); break; case 6: length = get_version(page); break; case 9: length = get_env(pid, page); break; case 10: length = get_arg(pid, page); break; case 11: length = get_stat(pid, page); break; case 12: length = get_statm(pid, page); break; #ifdef CONFIG_DEBUG_MALLOC case 13: length = get_malloc(page); break; #endif case 14: free_page((unsigned long) page); return read_core(inode, file, buf, count); case 15: length = get_maps(pid, page); break; case 16: length = get_module_list(page); break; case 17: length = get_kstat(page); break; default: free_page((unsigned long) page); return -EBADF; } if (file->f_pos >= length) { free_page((unsigned long) page); return 0; } if (count + file->f_pos > length) count = length - file->f_pos; end = count + file->f_pos; memcpy_tofs(buf, page + file->f_pos, count); free_page((unsigned long) page); file->f_pos = end; return count; }