shared.c File Reference

MH shared functions. More...

#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "core/lib.h"
#include "shared.h"
#include "globals.h"
#include "mdata.h"

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Functions
mode_t	mh_umask (struct Mailbox *m)
	Create a umask from the mailbox directory.
bool	mh_mkstemp (struct Mailbox *m, FILE **fp, char **tgt)
	Create a temporary file.

Detailed Description

MH shared functions.

Authors

• Michael R. Elkins
• Thomas Roessler
• Michael R. Elkins
• Richard Russon

Copyright

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file shared.c.

Function Documentation

mh_umask()

mode_t mh_umask

(

struct Mailbox *

m

)

Create a umask from the mailbox directory.

Parameters

m

Mailbox

Return values

num

Umask

Definition at line 52 of file shared.c.

{
  struct MhMboxData *mhata = mh_mdata_get(m);
  if (mhata && mhata->umask)
    return mhata->umask;
 
  struct stat st = { 0 };
  if (stat(mailbox_path(m), &st) != 0)
  {
    mutt_debug(LL_DEBUG1, "stat failed on %s\n", mailbox_path(m));
    return 077;
  }
 
  return 0777 & ~st.st_mode;
}

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mh_mkstemp()

bool mh_mkstemp	(	struct Mailbox *	m,
		FILE **	fp,
		char **	tgt
	)

Create a temporary file.

Parameters

[in]	m	Mailbox to create the file in
[out]	fp	File handle
[out]	tgt	File name

Return values

true	Success
false	Failure

Definition at line 76 of file shared.c.

{
  int fd;
  char path[PATH_MAX] = { 0 };
 
  mode_t omask = umask(mh_umask(m));
  while (true)
  {
    snprintf(path, sizeof(path), "%s/.neomutt-%s-%d-%" PRIu64, mailbox_path(m),
             NONULL(ShortHostname), (int) getpid(), mutt_rand64());
    fd = open(path, O_WRONLY | O_EXCL | O_CREAT, 0666);
    if (fd == -1)
    {
      if (errno != EEXIST)
      {
        mutt_perror("%s", path);
        umask(omask);
        return false;
      }
    }
    else
    {
      *tgt = mutt_str_dup(path);
      break;
    }
  }
  umask(omask);
 
  *fp = fdopen(fd, "w");
  if (!*fp)
  {
    FREE(tgt);
    close(fd);
    unlink(path);
    return false;
  }
 
  return true;
}

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