mutt_attach.c File Reference

Handling of email attachments. More...

#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "mutt_attach.h"
#include "lib.h"
#include "imap/lib.h"
#include "ncrypt/lib.h"
#include "pager/lib.h"
#include "question/lib.h"
#include "send/lib.h"
#include "attach.h"
#include "cid.h"
#include "module_data.h"
#include "muttlib.h"
#include "mx.h"

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Functions
int	mutt_get_tmp_attachment (struct Body *b)
	Get a temporary copy of an attachment.
int	mutt_compose_attachment (struct Body *b)
	Create an attachment.
bool	mutt_edit_attachment (struct Body *b)
	Edit an attachment.
void	mutt_check_lookup_list (struct Body *b, char *type, size_t len)
	Update the mime type.
static int	wait_interactive_filter (pid_t pid)
	Wait after an interactive filter.
int	mutt_view_attachment (FILE *fp, struct Body *b, enum ViewAttachMode mode, struct Email *e, struct AttachCtx *actx, struct MuttWindow *win)
	View an attachment.
int	mutt_pipe_attachment (FILE *fp, struct Body *b, const char *path, const char *outfile)
	Pipe an attachment to a command.
static FILE *	save_attachment_open (const char *path, enum SaveAttach opt)
	Open a file to write an attachment to.
int	mutt_save_attachment (FILE *fp, struct Body *b, const char *path, enum SaveAttach opt, struct Email *e)
	Save an attachment.
int	mutt_decode_save_attachment (FILE *fp, struct Body *b, const char *path, StateFlags flags, enum SaveAttach opt)
	Decode, then save an attachment.
int	mutt_print_attachment (FILE *fp, struct Body *b)
	Print out an attachment.
void	mutt_add_temp_attachment (const char *filename)
	Add file to list of temporary attachments.
void	mutt_temp_attachments_cleanup (struct ListHead *list)
	Delete all temporary attachments.

Detailed Description

Handling of email attachments.

Authors

• Pietro Cerutti
• Richard Russon
• Ihor Antonov
• David Purton
• Dennis Schön

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 mutt_attach.c.

Function Documentation

mutt_get_tmp_attachment()

int mutt_get_tmp_attachment

(

struct Body *

b

)

Get a temporary copy of an attachment.

Parameters

b	Attachment to copy

Return values

0	Success
-1	Error

Definition at line 68 of file mutt_attach.c.

{
  char type[256] = { 0 };
 
  if (b->unlink)
    return 0;
 
  struct Buffer *tempfile = buf_pool_get();
  struct MailcapEntry *entry = mailcap_entry_new();
  snprintf(type, sizeof(type), "%s/%s", BODY_TYPE(b), b->subtype);
  mailcap_lookup(b, type, sizeof(type), entry, MUTT_MC_NONE);
  mailcap_expand_filename(entry->nametemplate, b->filename, tempfile);
 
  mailcap_entry_free(&entry);
 
  FILE *fp_in = NULL, *fp_out = NULL;
  if ((fp_in = mutt_file_fopen(b->filename, "r")) &&
      (fp_out = mutt_file_fopen(buf_string(tempfile), "w")))
  {
    mutt_file_copy_stream(fp_in, fp_out);
    mutt_str_replace(&b->filename, buf_string(tempfile));
    b->unlink = true;
 
    struct stat st = { 0 };
    if ((fstat(fileno(fp_in), &st) == 0) && (b->stamp >= st.st_mtime))
    {
      mutt_stamp_attachment(b);
    }
  }
  else
  {
    mutt_perror("%s", fp_in ? buf_string(tempfile) : b->filename);
  }
 
  mutt_file_fclose(&fp_in);
  mutt_file_fclose(&fp_out);
 
  buf_pool_release(&tempfile);
 
  return b->unlink ? 0 : -1;
}

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mutt_compose_attachment()

int mutt_compose_attachment

(

struct Body *

b

)

Create an attachment.

Parameters

b	Body of email

Return values

1	Require full screen redraw
0	Otherwise

Definition at line 116 of file mutt_attach.c.

{
  char type[256] = { 0 };
  struct MailcapEntry *entry = mailcap_entry_new();
  bool unlink_newfile = false;
  int rc = 0;
  struct Buffer *cmd = buf_pool_get();
  struct Buffer *newfile = buf_pool_get();
  struct Buffer *tempfile = buf_pool_get();
 
  snprintf(type, sizeof(type), "%s/%s", BODY_TYPE(b), b->subtype);
  if (mailcap_lookup(b, type, sizeof(type), entry, MUTT_MC_COMPOSE))
  {
    if (entry->composecommand || entry->composetypecommand)
    {
      if (entry->composetypecommand)
        buf_strcpy(cmd, entry->composetypecommand);
      else
        buf_strcpy(cmd, entry->composecommand);
 
      mailcap_expand_filename(entry->nametemplate, b->filename, newfile);
      mutt_debug(LL_DEBUG1, "oldfile: %s     newfile: %s\n", b->filename,
                 buf_string(newfile));
      if (mutt_file_symlink(b->filename, buf_string(newfile)) == -1)
      {
        if (query_yesorno(_("Can't match 'nametemplate', continue?"), MUTT_YES) != MUTT_YES)
          goto bailout;
        buf_strcpy(newfile, b->filename);
      }
      else
      {
        unlink_newfile = true;
      }
 
      if (mailcap_expand_command(b, buf_string(newfile), type, cmd))
      {
        /* For now, editing requires a file, no piping */
        mutt_error(_("Mailcap compose entry requires %%s"));
      }
      else
      {
        int r;
 
        mutt_endwin();
        r = mutt_system(buf_string(cmd));
        if (r == -1)
          mutt_error(_("Error running \"%s\""), buf_string(cmd));
 
        if ((r != -1) && entry->composetypecommand)
        {
          FILE *fp = mutt_file_fopen(b->filename, "r");
          if (!fp)
          {
            mutt_perror(_("Failure to open file to parse headers"));
            goto bailout;
          }
 
          struct Body *b_mime = mutt_read_mime_header(fp, 0);
          if (b_mime)
          {
            if (!TAILQ_EMPTY(&b_mime->parameter))
            {
              mutt_param_free(&b->parameter);
              b->parameter = b_mime->parameter;
              TAILQ_INIT(&b_mime->parameter);
            }
            if (b_mime->description)
            {
              FREE(&b->description);
              b->description = b_mime->description;
              b_mime->description = NULL;
            }
            if (b_mime->form_name)
            {
              FREE(&b->form_name);
              b->form_name = b_mime->form_name;
              b_mime->form_name = NULL;
            }
 
            /* Remove headers by copying out data to another file, then
             * copying the file back */
            const LOFF_T offset = b_mime->offset;
            mutt_body_free(&b_mime);
            if (!mutt_file_seek(fp, offset, SEEK_SET))
            {
              goto bailout;
            }
 
            buf_mktemp(tempfile);
            FILE *fp_tmp = mutt_file_fopen(buf_string(tempfile), "w");
            if (!fp_tmp)
            {
              mutt_perror(_("Failure to open file to strip headers"));
              mutt_file_fclose(&fp);
              goto bailout;
            }
            mutt_file_copy_stream(fp, fp_tmp);
            mutt_file_fclose(&fp);
            mutt_file_fclose(&fp_tmp);
            mutt_file_unlink(b->filename);
            if (mutt_file_rename(buf_string(tempfile), b->filename) != 0)
            {
              mutt_perror(_("Failure to rename file"));
              goto bailout;
            }
          }
        }
      }
    }
  }
  else
  {
    mutt_message(_("No mailcap compose entry for %s, creating empty file"), type);
    rc = 1;
    goto bailout;
  }
 
  rc = 1;
 
bailout:
 
  if (unlink_newfile)
    unlink(buf_string(newfile));
 
  buf_pool_release(&cmd);
  buf_pool_release(&newfile);
  buf_pool_release(&tempfile);
 
  mailcap_entry_free(&entry);
  return rc;
}

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mutt_edit_attachment()

bool mutt_edit_attachment

(

struct Body *

b

)

Edit an attachment.

Parameters

b	Email containing attachment

Return values

true	Editor found
false	Editor not found

Currently, this only works for send mode, as it assumes that the Body->filename actually contains the information. I'm not sure we want to deal with editing attachments we've already received, so this should be ok.

Returning 0 is useful to tell the calling menu to redraw

Definition at line 261 of file mutt_attach.c.

{
  char type[256] = { 0 };
  struct MailcapEntry *entry = mailcap_entry_new();
  bool unlink_newfile = false;
  bool rc = false;
  struct Buffer *cmd = buf_pool_get();
  struct Buffer *newfile = buf_pool_get();
 
  snprintf(type, sizeof(type), "%s/%s", BODY_TYPE(b), b->subtype);
  if (mailcap_lookup(b, type, sizeof(type), entry, MUTT_MC_EDIT))
  {
    if (entry->editcommand)
    {
      buf_strcpy(cmd, entry->editcommand);
      mailcap_expand_filename(entry->nametemplate, b->filename, newfile);
      mutt_debug(LL_DEBUG1, "oldfile: %s     newfile: %s\n", b->filename,
                 buf_string(newfile));
      if (mutt_file_symlink(b->filename, buf_string(newfile)) == -1)
      {
        if (query_yesorno(_("Can't match 'nametemplate', continue?"), MUTT_YES) != MUTT_YES)
          goto bailout;
        buf_strcpy(newfile, b->filename);
      }
      else
      {
        unlink_newfile = true;
      }
 
      if (mailcap_expand_command(b, buf_string(newfile), type, cmd))
      {
        /* For now, editing requires a file, no piping */
        mutt_error(_("Mailcap Edit entry requires %%s"));
        goto bailout;
      }
      else
      {
        mutt_endwin();
        if (mutt_system(buf_string(cmd)) == -1)
        {
          mutt_error(_("Error running \"%s\""), buf_string(cmd));
          goto bailout;
        }
      }
    }
  }
  else if (b->type == TYPE_TEXT)
  {
    /* On text, default to editor */
    const char *const c_editor = cs_subset_string(NeoMutt->sub, "editor");
    mutt_edit_file(NONULL(c_editor), b->filename);
  }
  else
  {
    mutt_error(_("No mailcap edit entry for %s"), type);
    goto bailout;
  }
 
  rc = true;
 
bailout:
 
  if (unlink_newfile)
    unlink(buf_string(newfile));
 
  buf_pool_release(&cmd);
  buf_pool_release(&newfile);
 
  mailcap_entry_free(&entry);
  return rc;
}

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mutt_check_lookup_list()

void mutt_check_lookup_list	(	struct Body *	b,
		char *	type,
		size_t	len )

Update the mime type.

Parameters

b	Message attachment body
type	Buffer with mime type of attachment in "type/subtype" format
len	Buffer length

Definition at line 339 of file mutt_attach.c.

{
  struct AttachModuleData *mod_data = neomutt_get_module_data(NeoMutt, MODULE_ID_ATTACH);
  ASSERT(mod_data);
 
  struct ListNode *np = NULL;
  STAILQ_FOREACH(np, &mod_data->mime_lookup, entries)
  {
    const int i = (int) mutt_str_len(np->data) - 1;
    if (((i > 0) && (np->data[i - 1] == '/') && (np->data[i] == '*') &&
         mutt_istrn_equal(type, np->data, i)) ||
        mutt_istr_equal(type, np->data))
    {
      struct Body tmp = { 0 };
      enum ContentType n;
      if ((n = mutt_lookup_mime_type(&tmp, b->filename)) != TYPE_OTHER ||
          (n = mutt_lookup_mime_type(&tmp, b->description)) != TYPE_OTHER)
      {
        snprintf(type, len, "%s/%s",
                 (n == TYPE_AUDIO)       ? "audio" :
                 (n == TYPE_APPLICATION) ? "application" :
                 (n == TYPE_IMAGE)       ? "image" :
                 (n == TYPE_MESSAGE)     ? "message" :
                 (n == TYPE_MODEL)       ? "model" :
                 (n == TYPE_MULTIPART)   ? "multipart" :
                 (n == TYPE_TEXT)        ? "text" :
                 (n == TYPE_VIDEO)       ? "video" :
                                           "other",
                 tmp.subtype);
        mutt_debug(LL_DEBUG1, "\"%s\" -> %s\n", b->filename, type);
      }
      FREE(&tmp.subtype);
      FREE(&tmp.xtype);
    }
  }
}

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wait_interactive_filter()

static int wait_interactive_filter ( pid_t pid )

static

Wait after an interactive filter.

Parameters

pid	Process id of the process to wait for

Return values

num	Exit status of the process identified by pid
-1	Error

This is used for filters that are actually interactive commands with input piped in: e.g. in mutt_view_attachment(), a mailcap entry without copiousoutput and without a s.

For those cases, we treat it like a blocking system command, and poll IMAP to keep connections open.

Definition at line 389 of file mutt_attach.c.

{
  int rc;
 
  rc = imap_wait_keep_alive(pid);
  mutt_sig_unblock_system(true);
  rc = WIFEXITED(rc) ? WEXITSTATUS(rc) : -1;
 
  return rc;
}

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mutt_view_attachment()

int mutt_view_attachment	(	FILE *	fp,
		struct Body *	b,
		enum ViewAttachMode	mode,
		struct Email *	e,
		struct AttachCtx *	actx,
		struct MuttWindow *	win )

View an attachment.

Parameters

fp	Source file stream. Can be NULL
b	The message body containing the attachment
mode	How the attachment should be viewed, see ViewAttachMode
e	Current Email. Can be NULL
actx	Attachment context
win	Window

Return values

0	The viewer is run and exited successfully
-1	Error
num	Return value of mutt_do_pager() when it is used

Display a message attachment using the viewer program configured in mailcap. If there is no mailcap entry for a file type, view the image as text. Viewer processes are opened and waited on synchronously so viewing an attachment this way will block the main neomutt process until the viewer process exits.

Definition at line 418 of file mutt_attach.c.

{
  bool use_mailcap = false;
  bool use_pipe = false;
  bool use_pager = true;
  char type[256] = { 0 };
  char desc[512] = { 0 };
  char *fname = NULL;
  struct MailcapEntry *entry = NULL;
  int rc = -1;
  bool has_tempfile = false;
  bool unlink_pagerfile = false;
 
  bool is_message = mutt_is_message_type(b->type, b->subtype);
  if ((WithCrypto != 0) && is_message && b->email &&
      (b->email->security & SEC_ENCRYPT) && !crypt_valid_passphrase(b->email->security))
  {
    return rc;
  }
 
  struct Buffer *tempfile = buf_pool_get();
  struct Buffer *pagerfile = buf_pool_get();
  struct Buffer *cmd = buf_pool_get();
 
  use_mailcap = ((mode == MUTT_VA_MAILCAP) ||
                 ((mode == MUTT_VA_REGULAR) && mutt_needs_mailcap(b)) ||
                 (mode == MUTT_VA_PAGER));
  snprintf(type, sizeof(type), "%s/%s", BODY_TYPE(b), b->subtype);
 
  char columns[16] = { 0 };
  snprintf(columns, sizeof(columns), "%d", win->state.cols);
  envlist_set(&NeoMutt->env, "COLUMNS", columns, true);
 
  if (use_mailcap)
  {
    entry = mailcap_entry_new();
    enum MailcapLookup mailcap_opt = (mode == MUTT_VA_PAGER) ? MUTT_MC_AUTOVIEW : MUTT_MC_NONE;
    if (!mailcap_lookup(b, type, sizeof(type), entry, mailcap_opt))
    {
      if ((mode == MUTT_VA_REGULAR) || (mode == MUTT_VA_PAGER))
      {
        /* fallback to view as text */
        mailcap_entry_free(&entry);
        mutt_error(_("No matching mailcap entry found.  Viewing as text."));
        mode = MUTT_VA_AS_TEXT;
        use_mailcap = false;
      }
      else
      {
        goto return_error;
      }
    }
  }
 
  if (use_mailcap)
  {
    if (!entry->command)
    {
      mutt_error(_("MIME type not defined.  Can't view attachment."));
      goto return_error;
    }
    buf_strcpy(cmd, entry->command);
 
    fname = mutt_str_dup(b->filename);
    /* In send mode(!fp), we allow slashes because those are part of
     * the tempfile.  The path will be removed in expand_filename */
    mutt_file_sanitize_filename(fname, fp ? true : false);
    mailcap_expand_filename(entry->nametemplate, fname, tempfile);
    FREE(&fname);
 
    if (mutt_save_attachment(fp, b, buf_string(tempfile), 0, NULL) == -1)
      goto return_error;
    has_tempfile = true;
 
    mutt_rfc3676_space_unstuff_attachment(b, buf_string(tempfile));
 
    /* check for multipart/related and save attachments with b Content-ID */
    if (mutt_str_equal(type, "text/html"))
    {
      struct Body *related_ancestor = NULL;
      if (actx->body_idx && (WithCrypto != 0) && (e->security & SEC_ENCRYPT))
        related_ancestor = attach_body_ancestor(actx->body_idx[0], b, "related");
      else
        related_ancestor = attach_body_ancestor(e->body, b, "related");
      if (related_ancestor)
      {
        struct CidMapList cid_map_list = STAILQ_HEAD_INITIALIZER(cid_map_list);
        mutt_debug(LL_DEBUG2, "viewing text/html attachment in multipart/related group\n");
        /* save attachments and build cid_map_list Content-ID to filename mapping list */
        cid_save_attachments(related_ancestor->parts, &cid_map_list);
        /* replace Content-IDs with filenames */
        cid_to_filename(tempfile, &cid_map_list);
        /* empty Content-ID to filename mapping list */
        cid_map_list_clear(&cid_map_list);
      }
    }
 
    use_pipe = mailcap_expand_command(b, buf_string(tempfile), type, cmd);
    use_pager = entry->copiousoutput;
  }
 
  if (use_pager)
  {
    if (fp && !use_mailcap && b->filename)
    {
      /* recv case */
      buf_strcpy(pagerfile, b->filename);
      mutt_adv_mktemp(pagerfile);
    }
    else
    {
      buf_mktemp(pagerfile);
    }
  }
 
  if (use_mailcap)
  {
    pid_t pid = 0;
    int fd_temp = -1, fd_pager = -1;
 
    if (!use_pager)
      mutt_endwin();
 
    const bool c_wait_key = cs_subset_bool(NeoMutt->sub, "wait_key");
    if (use_pager || use_pipe)
    {
      if (use_pager &&
          ((fd_pager = mutt_file_open(buf_string(pagerfile),
                                      O_CREAT | O_EXCL | O_WRONLY, 0600)) == -1))
      {
        mutt_perror("open");
        goto return_error;
      }
      unlink_pagerfile = true;
 
      if (use_pipe && ((fd_temp = open(buf_string(tempfile), 0)) == -1))
      {
        if (fd_pager != -1)
          close(fd_pager);
        mutt_perror("open");
        goto return_error;
      }
      unlink_pagerfile = true;
 
      pid = filter_create_fd(buf_string(cmd), NULL, NULL, NULL, use_pipe ? fd_temp : -1,
                             use_pager ? fd_pager : -1, -1, NeoMutt->env);
 
      if (pid == -1)
      {
        if (fd_pager != -1)
          close(fd_pager);
 
        if (fd_temp != -1)
          close(fd_temp);
 
        mutt_error(_("Can't create filter"));
        goto return_error;
      }
 
      if (use_pager)
      {
        if (b->description)
        {
          snprintf(desc, sizeof(desc), _("---Command: %-20.20s Description: %s"),
                   buf_string(cmd), b->description);
        }
        else
        {
          snprintf(desc, sizeof(desc), _("---Command: %-30.30s Attachment: %s"),
                   buf_string(cmd), type);
        }
        filter_wait(pid);
      }
      else
      {
        if (wait_interactive_filter(pid) || (entry->needsterminal && c_wait_key))
          mutt_any_key_to_continue(NULL);
      }
 
      if (fd_temp != -1)
        close(fd_temp);
      if (fd_pager != -1)
        close(fd_pager);
    }
    else
    {
      /* interactive cmd */
      int rv = mutt_system(buf_string(cmd));
      if (rv == -1)
        mutt_debug(LL_DEBUG1, "Error running \"%s\"\n", cmd->data);
 
      if ((rv != 0) || (entry->needsterminal && c_wait_key))
        mutt_any_key_to_continue(NULL);
    }
  }
  else
  {
    /* Don't use mailcap; the attachment is viewed in the pager */
 
    if (mode == MUTT_VA_AS_TEXT)
    {
      /* just let me see the raw data */
      if (fp)
      {
        /* Viewing from a received message.
         *
         * Don't use mutt_save_attachment() because we want to perform charset
         * conversion since this will be displayed by the internal pager.  */
        struct State state = { 0 };
 
        state.fp_out = mutt_file_fopen(buf_string(pagerfile), "w");
        if (!state.fp_out)
        {
          mutt_debug(LL_DEBUG1, "mutt_file_fopen(%s) errno=%d %s\n",
                     buf_string(pagerfile), errno, strerror(errno));
          mutt_perror("%s", buf_string(pagerfile));
          goto return_error;
        }
        state.fp_in = fp;
        state.flags = STATE_CHARCONV;
        mutt_decode_attachment(b, &state);
        mutt_file_fclose(&state.fp_out);
      }
      else
      {
        /* in compose mode, just copy the file.  we can't use
         * mutt_decode_attachment() since it assumes the content-encoding has
         * already been applied */
        if (mutt_save_attachment(fp, b, buf_string(pagerfile), MUTT_SAVE_NONE, NULL))
          goto return_error;
        unlink_pagerfile = true;
      }
      mutt_rfc3676_space_unstuff_attachment(b, buf_string(pagerfile));
    }
    else
    {
      StateFlags flags = STATE_DISPLAY | STATE_DISPLAY_ATTACH;
      const char *const c_pager = pager_get_pager(NeoMutt->sub);
      if (!c_pager)
        flags |= STATE_PAGER;
 
      /* Use built-in handler */
      if (mutt_decode_save_attachment(fp, b, buf_string(pagerfile), flags, MUTT_SAVE_NONE))
      {
        goto return_error;
      }
      unlink_pagerfile = true;
    }
 
    if (b->description)
      mutt_str_copy(desc, b->description, sizeof(desc));
    else if (b->filename)
      snprintf(desc, sizeof(desc), _("---Attachment: %s: %s"), b->filename, type);
    else
      snprintf(desc, sizeof(desc), _("---Attachment: %s"), type);
  }
 
  /* We only reach this point if there have been no errors */
 
  if (use_pager)
  {
    struct PagerData pdata = { 0 };
    struct PagerView pview = { &pdata };
 
    pdata.actx = actx;
    pdata.body = b;
    pdata.fname = buf_string(pagerfile);
    pdata.fp = fp;
 
    pview.banner = desc;
    pview.flags = MUTT_PAGER_ATTACHMENT |
                  (is_message ? MUTT_PAGER_MESSAGE : MUTT_PAGER_NONE) |
                  ((use_mailcap && entry->xneomuttnowrap) ? MUTT_PAGER_NOWRAP : MUTT_PAGER_NONE);
    pview.mode = PAGER_MODE_ATTACH;
 
    rc = mutt_do_pager(&pview, e);
 
    buf_reset(pagerfile);
    unlink_pagerfile = false;
  }
  else
  {
    rc = 0;
  }
 
return_error:
 
  if (!entry || !entry->xneomuttkeep)
  {
    if ((fp && !buf_is_empty(tempfile)) || has_tempfile)
    {
      /* add temporary file to list of files to be deleted on timeout hook */
      mutt_add_temp_attachment(buf_string(tempfile));
    }
  }
 
  mailcap_entry_free(&entry);
 
  if (unlink_pagerfile)
    mutt_file_unlink(buf_string(pagerfile));
 
  buf_pool_release(&tempfile);
  buf_pool_release(&pagerfile);
  buf_pool_release(&cmd);
  envlist_unset(&NeoMutt->env, "COLUMNS");
 
  return rc;
}

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mutt_pipe_attachment()

int mutt_pipe_attachment	(	FILE *	fp,
		struct Body *	b,
		const char *	path,
		const char *	outfile )

Pipe an attachment to a command.

Parameters

fp	File to pipe into the command
b	Attachment
path	Path to command
outfile	File to save output to

Return values

1	Success
0	Error

Definition at line 737 of file mutt_attach.c.

{
  pid_t pid = 0;
  int out = -1, rc = 0;
  bool is_flowed = false;
  bool unlink_unstuff = false;
  FILE *fp_filter = NULL, *fp_unstuff = NULL, *fp_in = NULL;
  struct Buffer *unstuff_tempfile = NULL;
 
  if (outfile && *outfile)
  {
    out = mutt_file_open(outfile, O_CREAT | O_EXCL | O_WRONLY, 0600);
    if (out < 0)
    {
      mutt_perror("open");
      return 0;
    }
  }
 
  if (mutt_rfc3676_is_format_flowed(b))
  {
    is_flowed = true;
    unstuff_tempfile = buf_pool_get();
    buf_mktemp(unstuff_tempfile);
  }
 
  mutt_endwin();
 
  if (outfile && *outfile)
    pid = filter_create_fd(path, &fp_filter, NULL, NULL, -1, out, -1, NeoMutt->env);
  else
    pid = filter_create(path, &fp_filter, NULL, NULL, NeoMutt->env);
  if (pid < 0)
  {
    mutt_perror(_("Can't create filter"));
    goto bail;
  }
 
  /* recv case */
  if (fp)
  {
    struct State state = { 0 };
 
    /* perform charset conversion on text attachments when piping */
    state.flags = STATE_CHARCONV;
 
    if (is_flowed)
    {
      fp_unstuff = mutt_file_fopen(buf_string(unstuff_tempfile), "w");
      if (!fp_unstuff)
      {
        mutt_perror("mutt_file_fopen");
        goto bail;
      }
      unlink_unstuff = true;
 
      state.fp_in = fp;
      state.fp_out = fp_unstuff;
      mutt_decode_attachment(b, &state);
      mutt_file_fclose(&fp_unstuff);
 
      mutt_rfc3676_space_unstuff_attachment(b, buf_string(unstuff_tempfile));
 
      fp_unstuff = mutt_file_fopen(buf_string(unstuff_tempfile), "r");
      if (!fp_unstuff)
      {
        mutt_perror("mutt_file_fopen");
        goto bail;
      }
      mutt_file_copy_stream(fp_unstuff, fp_filter);
      mutt_file_fclose(&fp_unstuff);
    }
    else
    {
      state.fp_in = fp;
      state.fp_out = fp_filter;
      mutt_decode_attachment(b, &state);
    }
  }
  else
  {
    /* send case */
    const char *infile = NULL;
 
    if (is_flowed)
    {
      if (mutt_save_attachment(fp, b, buf_string(unstuff_tempfile),
                               MUTT_SAVE_NONE, NULL) == -1)
      {
        goto bail;
      }
      unlink_unstuff = true;
      mutt_rfc3676_space_unstuff_attachment(b, buf_string(unstuff_tempfile));
      infile = buf_string(unstuff_tempfile);
    }
    else
    {
      infile = b->filename;
    }
 
    fp_in = mutt_file_fopen(infile, "r");
    if (!fp_in)
    {
      mutt_perror("fopen");
      goto bail;
    }
 
    mutt_file_copy_stream(fp_in, fp_filter);
    mutt_file_fclose(&fp_in);
  }
 
  mutt_file_fclose(&fp_filter);
  rc = 1;
 
bail:
  if (outfile && *outfile)
  {
    close(out);
    if (rc == 0)
      unlink(outfile);
    else if (is_flowed)
      mutt_rfc3676_space_stuff_attachment(NULL, outfile);
  }
 
  mutt_file_fclose(&fp_unstuff);
  mutt_file_fclose(&fp_filter);
  mutt_file_fclose(&fp_in);
 
  if (unlink_unstuff)
    mutt_file_unlink(buf_string(unstuff_tempfile));
  buf_pool_release(&unstuff_tempfile);
 
  /* check for error exit from child process */
  if ((pid > 0) && (filter_wait(pid) != 0))
    rc = 0;
 
  const bool c_wait_key = cs_subset_bool(NeoMutt->sub, "wait_key");
  if ((rc == 0) || c_wait_key)
    mutt_any_key_to_continue(NULL);
  return rc;
}

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save_attachment_open()

static FILE * save_attachment_open ( const char * path, enum SaveAttach opt )

static

Open a file to write an attachment to.

Parameters

path	Path to file to open
opt	Save option, see SaveAttach

Return values

ptr	File handle to attachment file

Definition at line 885 of file mutt_attach.c.

{
  if (opt == MUTT_SAVE_APPEND)
    return mutt_file_fopen_masked(path, "a");
  else
    return mutt_file_fopen_masked(path, "w");
}

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mutt_save_attachment()

int mutt_save_attachment	(	FILE *	fp,
		struct Body *	b,
		const char *	path,
		enum SaveAttach	opt,
		struct Email *	e )

Save an attachment.

Parameters

fp	Source file stream. Can be NULL
b	Email Body
path	Where to save the attachment
opt	Save option, see SaveAttach
e	Current Email. Can be NULL

Return values

0	Success
-1	Error

Definition at line 903 of file mutt_attach.c.

{
  if (!b)
    return -1;
 
  if (fp)
  {
    /* recv mode */
 
    if (e && b->email && (b->encoding != ENC_BASE64) &&
        (b->encoding != ENC_QUOTED_PRINTABLE) && mutt_is_message_type(b->type, b->subtype))
    {
      /* message type attachments are written to mail folders. */
 
      char buf[8192] = { 0 };
      struct Message *msg = NULL;
      CopyHeaderFlags chflags = CH_NONE;
      int rc = -1;
 
      struct Email *e_new = b->email;
      e_new->msgno = e->msgno; /* required for MH/maildir */
      e_new->read = true;
 
      if (!mutt_file_seek(fp, b->offset, SEEK_SET))
        return -1;
      if (!fgets(buf, sizeof(buf), fp))
        return -1;
      struct Mailbox *m_att = mx_path_resolve(path);
      if (!mx_mbox_open(m_att, MUTT_APPEND | MUTT_QUIET))
      {
        mailbox_free(&m_att);
        return -1;
      }
      msg = mx_msg_open_new(m_att, e_new, is_from(buf, NULL, 0, NULL) ? MUTT_MSG_NONE : MUTT_ADD_FROM);
      if (!msg)
      {
        mx_mbox_close(m_att);
        return -1;
      }
      if ((m_att->type == MUTT_MBOX) || (m_att->type == MUTT_MMDF))
        chflags = CH_FROM | CH_UPDATE_LEN;
      chflags |= ((m_att->type == MUTT_MAILDIR) ? CH_NOSTATUS : CH_UPDATE);
      if ((mutt_copy_message_fp(msg->fp, fp, e_new, MUTT_CM_NONE, chflags, 0) == 0) &&
          (mx_msg_commit(m_att, msg) == 0))
      {
        rc = 0;
      }
      else
      {
        rc = -1;
      }
 
      mx_msg_close(m_att, &msg);
      mx_mbox_close(m_att);
      return rc;
    }
    else
    {
      /* In recv mode, extract from folder and decode */
 
      struct State state = { 0 };
 
      state.fp_out = save_attachment_open(path, opt);
      if (!state.fp_out)
      {
        mutt_perror("fopen");
        return -1;
      }
      if (!mutt_file_seek((state.fp_in = fp), b->offset, SEEK_SET))
      {
        mutt_file_fclose(&state.fp_out);
        return -1;
      }
      mutt_decode_attachment(b, &state);
 
      if (mutt_file_fsync_close(&state.fp_out) != 0)
      {
        mutt_perror("fclose");
        return -1;
      }
    }
  }
  else
  {
    if (!b->filename)
      return -1;
 
    /* In send mode, just copy file */
 
    FILE *fp_old = mutt_file_fopen(b->filename, "r");
    if (!fp_old)
    {
      mutt_perror("fopen");
      return -1;
    }
 
    FILE *fp_new = save_attachment_open(path, opt);
    if (!fp_new)
    {
      mutt_perror("fopen");
      mutt_file_fclose(&fp_old);
      return -1;
    }
 
    if (mutt_file_copy_stream(fp_old, fp_new) == -1)
    {
      mutt_error(_("Write fault"));
      mutt_file_fclose(&fp_old);
      mutt_file_fclose(&fp_new);
      return -1;
    }
    mutt_file_fclose(&fp_old);
    if (mutt_file_fsync_close(&fp_new) != 0)
    {
      mutt_error(_("Write fault"));
      return -1;
    }
  }
 
  return 0;
}

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mutt_decode_save_attachment()

int mutt_decode_save_attachment	(	FILE *	fp,
		struct Body *	b,
		const char *	path,
		StateFlags	flags,
		enum SaveAttach	opt )

Decode, then save an attachment.

Parameters

fp	File to read from (OPTIONAL)
b	Attachment
path	Path to save the Attachment to
flags	Flags, e.g. STATE_DISPLAY
opt	Save option, see SaveAttach

Return values

0	Success
-1	Error

Definition at line 1036 of file mutt_attach.c.

{
  struct State state = { 0 };
  unsigned int saved_encoding = 0;
  struct Body *saved_parts = NULL;
  struct Email *e_saved = NULL;
  int rc = 0;
 
  state.flags = flags;
 
  if (opt == MUTT_SAVE_APPEND)
    state.fp_out = mutt_file_fopen_masked(path, "a");
  else
    state.fp_out = mutt_file_fopen_masked(path, "w");
 
  if (!state.fp_out)
  {
    mutt_perror("fopen");
    return -1;
  }
 
  if (fp)
  {
    state.fp_in = fp;
    state.flags |= STATE_CHARCONV;
  }
  else
  {
    /* When called from the compose menu, the attachment isn't parsed,
     * so we need to do it here. */
    state.fp_in = mutt_file_fopen(b->filename, "r");
    if (!state.fp_in)
    {
      mutt_perror("fopen");
      mutt_file_fclose(&state.fp_out);
      return -1;
    }
 
    struct stat st = { 0 };
    if (fstat(fileno(state.fp_in), &st) == -1)
    {
      mutt_perror("stat");
      mutt_file_fclose(&state.fp_in);
      mutt_file_fclose(&state.fp_out);
      return -1;
    }
 
    saved_encoding = b->encoding;
    if (!is_multipart(b))
      b->encoding = ENC_8BIT;
 
    b->length = st.st_size;
    b->offset = 0;
    saved_parts = b->parts;
    e_saved = b->email;
    mutt_parse_part(state.fp_in, b);
 
    if (b->noconv || is_multipart(b))
      state.flags |= STATE_CHARCONV;
  }
 
  mutt_body_handler(b, &state);
 
  if (mutt_file_fsync_close(&state.fp_out) != 0)
  {
    mutt_perror("fclose");
    rc = -1;
  }
  if (!fp)
  {
    b->length = 0;
    b->encoding = saved_encoding;
    if (saved_parts)
    {
      email_free(&b->email);
      b->parts = saved_parts;
      b->email = e_saved;
    }
    mutt_file_fclose(&state.fp_in);
  }
 
  return rc;
}

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mutt_print_attachment()

int mutt_print_attachment	(	FILE *	fp,
		struct Body *	b )

Print out an attachment.

Parameters

fp	File to write to
b	Attachment

Return values

1	Success
0	Error

Ok, the difference between send and receive: recv: Body->filename is a suggested name, and Mailbox|Email points to the attachment in mailbox which is encoded send: Body->filename points to the un-encoded file which contains the attachment

Definition at line 1134 of file mutt_attach.c.

{
  char type[256] = { 0 };
  pid_t pid;
  FILE *fp_in = NULL, *fp_out = NULL;
  bool unlink_newfile = false;
  struct Buffer *newfile = buf_pool_get();
  struct Buffer *cmd = buf_pool_get();
 
  int rc = 0;
 
  snprintf(type, sizeof(type), "%s/%s", BODY_TYPE(b), b->subtype);
 
  if (mailcap_lookup(b, type, sizeof(type), NULL, MUTT_MC_PRINT))
  {
    mutt_debug(LL_DEBUG2, "Using mailcap\n");
 
    struct MailcapEntry *entry = mailcap_entry_new();
    mailcap_lookup(b, type, sizeof(type), entry, MUTT_MC_PRINT);
 
    char *sanitized_fname = mutt_str_dup(b->filename);
    /* In send mode (!fp), we allow slashes because those are part of
     * the tempfile.  The path will be removed in expand_filename */
    mutt_file_sanitize_filename(sanitized_fname, fp ? true : false);
    mailcap_expand_filename(entry->nametemplate, sanitized_fname, newfile);
    FREE(&sanitized_fname);
 
    if (mutt_save_attachment(fp, b, buf_string(newfile), MUTT_SAVE_NONE, NULL) == -1)
    {
      goto mailcap_cleanup;
    }
    unlink_newfile = 1;
 
    mutt_rfc3676_space_unstuff_attachment(b, buf_string(newfile));
 
    buf_strcpy(cmd, entry->printcommand);
 
    bool piped = mailcap_expand_command(b, buf_string(newfile), type, cmd);
 
    mutt_endwin();
 
    const bool c_wait_key = cs_subset_bool(NeoMutt->sub, "wait_key");
    /* interactive program */
    if (piped)
    {
      fp_in = mutt_file_fopen(buf_string(newfile), "r");
      if (!fp_in)
      {
        mutt_perror("fopen");
        mailcap_entry_free(&entry);
        goto mailcap_cleanup;
      }
 
      pid = filter_create(buf_string(cmd), &fp_out, NULL, NULL, NeoMutt->env);
      if (pid < 0)
      {
        mutt_perror(_("Can't create filter"));
        mailcap_entry_free(&entry);
        mutt_file_fclose(&fp_in);
        goto mailcap_cleanup;
      }
      mutt_file_copy_stream(fp_in, fp_out);
      mutt_file_fclose(&fp_out);
      mutt_file_fclose(&fp_in);
      if (filter_wait(pid) || c_wait_key)
        mutt_any_key_to_continue(NULL);
    }
    else
    {
      int rc2 = mutt_system(buf_string(cmd));
      if (rc2 == -1)
        mutt_debug(LL_DEBUG1, "Error running \"%s\"\n", cmd->data);
 
      if ((rc2 != 0) || c_wait_key)
        mutt_any_key_to_continue(NULL);
    }
 
    rc = 1;
 
  mailcap_cleanup:
    if (unlink_newfile)
      mutt_file_unlink(buf_string(newfile));
 
    mailcap_entry_free(&entry);
    goto out;
  }
 
  const char *const c_print_command = cs_subset_string(NeoMutt->sub, "print_command");
  if (mutt_istr_equal("text/plain", type) || mutt_istr_equal("application/postscript", type))
  {
    rc = (mutt_pipe_attachment(fp, b, NONULL(c_print_command), NULL));
    goto out;
  }
  else if (mutt_can_decode(b))
  {
    /* decode and print */
 
    fp_in = NULL;
    fp_out = NULL;
 
    buf_mktemp(newfile);
    if (mutt_decode_save_attachment(fp, b, buf_string(newfile), STATE_PRINTING,
                                    MUTT_SAVE_NONE) == 0)
    {
      unlink_newfile = true;
      mutt_debug(LL_DEBUG2, "successfully decoded %s type attachment to %s\n",
                 type, buf_string(newfile));
 
      fp_in = mutt_file_fopen(buf_string(newfile), "r");
      if (!fp_in)
      {
        mutt_perror("fopen");
        goto decode_cleanup;
      }
 
      mutt_debug(LL_DEBUG2, "successfully opened %s read-only\n", buf_string(newfile));
 
      mutt_endwin();
      pid = filter_create(NONULL(c_print_command), &fp_out, NULL, NULL, NeoMutt->env);
      if (pid < 0)
      {
        mutt_perror(_("Can't create filter"));
        goto decode_cleanup;
      }
 
      mutt_debug(LL_DEBUG2, "Filter created\n");
 
      mutt_file_copy_stream(fp_in, fp_out);
 
      mutt_file_fclose(&fp_out);
      mutt_file_fclose(&fp_in);
 
      const bool c_wait_key = cs_subset_bool(NeoMutt->sub, "wait_key");
      if ((filter_wait(pid) != 0) || c_wait_key)
        mutt_any_key_to_continue(NULL);
      rc = 1;
    }
  decode_cleanup:
    mutt_file_fclose(&fp_in);
    mutt_file_fclose(&fp_out);
    if (unlink_newfile)
      mutt_file_unlink(buf_string(newfile));
  }
  else
  {
    mutt_error(_("I don't know how to print that"));
    rc = 0;
  }
 
out:
  buf_pool_release(&newfile);
  buf_pool_release(&cmd);
 
  return rc;
}

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mutt_add_temp_attachment()

void mutt_add_temp_attachment

(

const char *

filename

)

Add file to list of temporary attachments.

Parameters

filename

filename with full path

Definition at line 1294 of file mutt_attach.c.

{
  struct AttachModuleData *mod_data = neomutt_get_module_data(NeoMutt, MODULE_ID_ATTACH);
  ASSERT(mod_data);
 
  mutt_list_insert_tail(&mod_data->temp_attachments, mutt_str_dup(filename));
}

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mutt_temp_attachments_cleanup()

void mutt_temp_attachments_cleanup

(

struct ListHead *

list

)

Delete all temporary attachments.

Parameters

list	List of temporary attachment files

Definition at line 1306 of file mutt_attach.c.

{
  if (!list)
    return;
 
  struct ListNode *np = NULL;
 
  STAILQ_FOREACH(np, list, entries)
  {
    (void) mutt_file_chmod_add(np->data, S_IWUSR);
    mutt_file_unlink(np->data);
  }
 
  mutt_list_free(list);
}

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