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/*
** Copyright 1998 - 2003 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "maildircreate.h"
#include "maildirmisc.h"
#include <sys/types.h>
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include "numlib/numlib.h"
FILE *maildir_tmpcreate_fp(struct maildir_tmpcreate_info *info)
{
int fd=maildir_tmpcreate_fd(info);
FILE *fp;
if (fd < 0)
return NULL;
fp=fdopen(fd, "w+");
if (fp == NULL)
{
close(fd);
return NULL;
}
return fp;
}
static int maildir_tmpcreate_fd_do(struct maildir_tmpcreate_info *info);
#define KEEPTRYING (60 * 60)
#define SLEEPFOR 3
int maildir_tmpcreate_fd(struct maildir_tmpcreate_info *info)
{
int i;
if (!info->doordie)
return (maildir_tmpcreate_fd_do(info));
for (i=0; i<KEEPTRYING / SLEEPFOR; i++)
{
int fd=maildir_tmpcreate_fd_do(info);
if (fd >= 0 || errno != EAGAIN)
return fd;
sleep(SLEEPFOR);
}
return -1;
}
static int maildir_tmpcreate_fd_do(struct maildir_tmpcreate_info *info)
{
const char *maildir=info->maildir;
const char *uniq=info->uniq;
const char *hostname=info->hostname;
char hostname_buf[256];
char time_buf[NUMBUFSIZE];
char usec_buf[NUMBUFSIZE];
char pid_buf[NUMBUFSIZE];
char len_buf[NUMBUFSIZE+3];
char dev_buf[NUMBUFSIZE];
char ino_buf[NUMBUFSIZE];
struct timeval tv;
struct stat stat_buf;
int fd;
if (!maildir)
maildir=".";
if (!uniq)
uniq="";
if (!hostname || !*hostname)
{
hostname_buf[sizeof(hostname_buf)-1]=0;
if (gethostname(hostname_buf, sizeof(hostname_buf)-1) < 0)
strcpy(hostname_buf, "localhost");
hostname=hostname_buf;
}
gettimeofday(&tv, NULL);
libmail_str_time_t(tv.tv_sec, time_buf);
libmail_str_time_t(tv.tv_usec, usec_buf);
libmail_str_pid_t(getpid(), pid_buf);
len_buf[0]=0;
if (info->msgsize > 0)
{
strcpy(len_buf, ",S=");
libmail_str_size_t(info->msgsize, len_buf+3);
}
if (info->tmpname)
free(info->tmpname);
info->tmpname=malloc(strlen(maildir)+strlen(uniq)+
strlen(hostname)+strlen(time_buf)+
strlen(usec_buf)+
strlen(pid_buf)+strlen(len_buf)+100);
if (!info->tmpname)
{
maildir_tmpcreate_free(info);
return -1;
}
strcpy(info->tmpname, maildir);
strcat(info->tmpname, "/tmp/");
strcat(info->tmpname, time_buf);
strcat(info->tmpname, ".M");
strcat(info->tmpname, usec_buf);
strcat(info->tmpname, "P");
strcat(info->tmpname, pid_buf);
if (*uniq)
strcat(strcat(info->tmpname, "_"), uniq);
strcat(info->tmpname, ".");
strcat(info->tmpname, hostname);
strcat(info->tmpname, len_buf);
if (stat( info->tmpname, &stat_buf) == 0)
{
maildir_tmpcreate_free(info);
errno=EAGAIN;
return -1;
}
if (errno != ENOENT)
{
maildir_tmpcreate_free(info);
if (errno == EAGAIN)
errno=EIO;
return -1;
}
if ((fd=maildir_safeopen_stat(info->tmpname, O_CREAT|O_RDWR|O_TRUNC,
info->openmode, &stat_buf)) < 0)
{
maildir_tmpcreate_free(info);
return -1;
}
libmail_strh_dev_t(stat_buf.st_dev, dev_buf);
libmail_strh_ino_t(stat_buf.st_ino, ino_buf);
if (info->newname)
free(info->newname);
info->newname=malloc(strlen(info->tmpname)+strlen(ino_buf)+
strlen(dev_buf)+3);
if (!info->newname)
{
maildir_tmpcreate_free(info);
unlink(info->tmpname);
close(fd);
if (errno == EAGAIN)
errno=EIO;
return -1;
}
strcpy(info->newname, maildir);
strcat(info->newname, "/new/");
strcat(info->newname, time_buf);
strcat(info->newname, ".M");
strcat(info->newname, usec_buf);
strcat(info->newname, "P");
strcat(info->newname, pid_buf);
strcat(info->newname, "V");
strcat(info->newname, dev_buf);
strcat(info->newname, "I");
strcat(info->newname, ino_buf);
if (*uniq)
strcat(strcat(info->newname, "_"), uniq);
strcat(info->newname, ".");
strcat(info->newname, hostname);
strcat(info->newname, len_buf);
return fd;
}
void maildir_tmpcreate_free(struct maildir_tmpcreate_info *info)
{
if (info->tmpname)
free(info->tmpname);
info->tmpname=NULL;
if (info->newname)
free(info->newname);
info->newname=NULL;
}
int maildir_movetmpnew(const char *tmpname, const char *newname)
{
if (link(tmpname, newname) == 0)
{
unlink(tmpname);
return 0;
}
if (errno != EXDEV)
return -1;
/* AFS? */
return rename(tmpname, newname);
}
