?? rewind.c
字號:
#include "mail.h"/* Rewind the index file for mail_nextrec(). * Automatically called by mail_open(). * Must be called before first mail_nextrec(). */voidmail_rewind(MAIL *mail){ off_t offset; offset = (mail->nhash + 1) * PTR_SZ; /* +1 for free list ptr */ /* We're just setting the file offset for this process to the start of the index records; no need to lock. +1 below for newline at end of hash table. */ if ( (mail->idxoff = lseek(mail->idxfd, offset+1, SEEK_SET)) == -1) err_dump("lseek error");}
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