mutt_header.c File Reference

Manipulate an email's header. More...

#include "config.h"
#include <stddef.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include "mutt/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "alias/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "mutt_header.h"
#include "enter/lib.h"
#include "index/lib.h"
#include "ncrypt/lib.h"
#include "postpone/lib.h"
#include "send/lib.h"
#include "globals.h"
#include "muttlib.h"
#include "mview.h"

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Functions
static void	label_ref_dec (struct Mailbox *m, char *label)
	Decrease the refcount of a label. More...
static void	label_ref_inc (struct Mailbox *m, char *label)
	Increase the refcount of a label. More...
static bool	label_message (struct Mailbox *m, struct Email *e, char *new_label)
	Add an X-Label: field. More...
int	mutt_label_message (struct MailboxView *mv, struct EmailArray *ea)
	Let the user label a message. More...
void	mutt_edit_headers (const char *editor, const char *body, struct Email *e, struct Buffer *fcc)
	Let the user edit the message header and body. More...
void	mutt_make_label_hash (struct Mailbox *m)
	Create a Hash Table to store the labels. More...
void	mutt_label_hash_add (struct Mailbox *m, struct Email *e)
	Add a message's labels to the Hash Table. More...
void	mutt_label_hash_remove (struct Mailbox *m, struct Email *e)
	Remove a message's labels from the Hash Table. More...

Detailed Description

Manipulate an email's header.

Authors

• Michael R. Elkins

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_header.c.

Function Documentation

label_ref_dec()

static void label_ref_dec ( struct Mailbox *  m, char *  label  )

static

Decrease the refcount of a label.

Parameters

m	Mailbox
label	Label

Definition at line 57 of file mutt_header.c.

{
  struct HashElem *he = mutt_hash_find_elem(m->label_hash, label);
  if (!he)
    return;
 
  uintptr_t count = (uintptr_t) he->data;
  if (count <= 1)
  {
    mutt_hash_delete(m->label_hash, label, NULL);
    return;
  }
 
  count--;
  he->data = (void *) count;
}

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label_ref_inc()

static void label_ref_inc ( struct Mailbox *  m, char *  label  )

static

Increase the refcount of a label.

Parameters

m	Mailbox
label	Label

Definition at line 79 of file mutt_header.c.

{
  uintptr_t count;
 
  struct HashElem *he = mutt_hash_find_elem(m->label_hash, label);
  if (!he)
  {
    count = 1;
    mutt_hash_insert(m->label_hash, label, (void *) count);
    return;
  }
 
  count = (uintptr_t) he->data;
  count++;
  he->data = (void *) count;
}

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label_message()

static bool label_message ( struct Mailbox *  m, struct Email *  e, char *  new_label  )

static

Add an X-Label: field.

Parameters

[in]	m	Mailbox
[in]	e	Email
[out]	new_label	Set to true if this is a new label

Return values

true	The label was added

Definition at line 103 of file mutt_header.c.

{
  if (!e)
    return false;
  if (mutt_str_equal(e->env->x_label, new_label))
    return false;
 
  if (e->env->x_label)
    label_ref_dec(m, e->env->x_label);
  if (mutt_str_replace(&e->env->x_label, new_label))
    label_ref_inc(m, e->env->x_label);
 
  e->changed = true;
  e->env->changed |= MUTT_ENV_CHANGED_XLABEL;
  return true;
}

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mutt_label_message()

int mutt_label_message	(	struct MailboxView *	mv,
		struct EmailArray *	ea
	)

Let the user label a message.

Parameters

mv	Mailbox
ea	Array of Emails to label

Return values

num	Number of messages changed

Definition at line 126 of file mutt_header.c.

{
  if (!mv || !mv->mailbox || !ea)
    return 0;
 
  struct Mailbox *m = mv->mailbox;
 
  int changed = 0;
  struct Buffer *buf = buf_pool_get();
 
  struct Email **ep = ARRAY_GET(ea, 0);
  if (ARRAY_SIZE(ea) == 1)
  {
    // If there's only one email, use its label as a template
    struct Email *e = *ep;
    if (e->env->x_label)
      buf_strcpy(buf, e->env->x_label);
  }
 
  if (buf_get_field("Label: ", buf, MUTT_COMP_LABEL, false, NULL, NULL, NULL) != 0)
  {
    goto done;
  }
 
  char *new_label = buf->data;
  SKIPWS(new_label);
  if (*new_label == '\0')
    new_label = NULL;
 
  ARRAY_FOREACH(ep, ea)
  {
    struct Email *e = *ep;
    if (label_message(m, e, new_label))
    {
      changed++;
      mutt_set_header_color(m, e);
    }
  }
 
done:
  buf_pool_release(&buf);
  return changed;
}

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mutt_edit_headers()

void mutt_edit_headers	(	const char *	editor,
		const char *	body,
		struct Email *	e,
		struct Buffer *	fcc
	)

Let the user edit the message header and body.

Parameters

editor	Editor command
body	File containing message body
e	Email
fcc	Buffer for the fcc field

Definition at line 177 of file mutt_header.c.

{
  struct Buffer *path = buf_pool_get();
  buf_mktemp(path);
  FILE *fp_out = mutt_file_fopen(buf_string(path), "w");
  if (!fp_out)
  {
    mutt_perror(buf_string(path));
    goto cleanup;
  }
 
  mutt_env_to_local(e->env);
  mutt_rfc822_write_header(fp_out, e->env, NULL, MUTT_WRITE_HEADER_EDITHDRS,
                           false, false, NeoMutt->sub);
  fputc('\n', fp_out); /* tie off the header. */
 
  /* now copy the body of the message. */
  FILE *fp_in = fopen(body, "r");
  if (!fp_in)
  {
    mutt_perror(body);
    mutt_file_fclose(&fp_out);
    goto cleanup;
  }
 
  mutt_file_copy_stream(fp_in, fp_out);
 
  mutt_file_fclose(&fp_in);
  mutt_file_fclose(&fp_out);
 
  struct stat st = { 0 };
  if (stat(buf_string(path), &st) == -1)
  {
    mutt_perror(buf_string(path));
    goto cleanup;
  }
 
  time_t mtime = mutt_file_decrease_mtime(buf_string(path), &st);
  if (mtime == (time_t) -1)
  {
    mutt_perror(buf_string(path));
    goto cleanup;
  }
 
  mutt_edit_file(editor, buf_string(path));
  if ((stat(buf_string(path), &st) != 0) || (mtime == st.st_mtime))
  {
    mutt_debug(LL_DEBUG1, "temp file was not modified\n");
    /* the file has not changed! */
    mutt_file_unlink(buf_string(path));
    goto cleanup;
  }
 
  mutt_file_unlink(body);
  mutt_list_free(&e->env->userhdrs);
 
  /* Read the temp file back in */
  fp_in = fopen(buf_string(path), "r");
  if (!fp_in)
  {
    mutt_perror(buf_string(path));
    goto cleanup;
  }
 
  fp_out = mutt_file_fopen(body, "w");
  if (!fp_out)
  {
    /* intentionally leak a possible temporary file here */
    mutt_file_fclose(&fp_in);
    mutt_perror(body);
    goto cleanup;
  }
 
  struct Envelope *env_new = NULL;
  char buf[1024] = { 0 };
  env_new = mutt_rfc822_read_header(fp_in, NULL, true, false);
  int bytes_read;
  while ((bytes_read = fread(buf, 1, sizeof(buf), fp_in)) > 0)
    fwrite(buf, 1, bytes_read, fp_out);
  mutt_file_fclose(&fp_out);
  mutt_file_fclose(&fp_in);
  mutt_file_unlink(buf_string(path));
 
  /* in case the user modifies/removes the In-Reply-To header with
   * $edit_headers set, we remove References: as they're likely invalid;
   * we can simply compare strings as we don't generate References for
   * multiple Message-Ids in IRT anyways */
#ifdef USE_NNTP
  if (!OptNewsSend)
#endif
  {
    if (!STAILQ_EMPTY(&e->env->in_reply_to) &&
        (STAILQ_EMPTY(&env_new->in_reply_to) ||
         !mutt_str_equal(STAILQ_FIRST(&env_new->in_reply_to)->data,
                         STAILQ_FIRST(&e->env->in_reply_to)->data)))
    {
      mutt_list_free(&e->env->references);
    }
  }
 
  /* restore old info. */
  mutt_list_free(&env_new->references);
  STAILQ_SWAP(&env_new->references, &e->env->references, ListNode);
 
  mutt_env_free(&e->env);
  e->env = env_new;
  env_new = NULL;
 
  mutt_expand_aliases_env(e->env);
 
  /* search through the user defined headers added to see if
   * fcc: or attach: or pgp: or smime: was specified */
 
  struct ListNode *np = NULL, *tmp = NULL;
  STAILQ_FOREACH_SAFE(np, &e->env->userhdrs, entries, tmp)
  {
    bool keep = true;
    size_t plen = 0;
 
    // Check for header names: most specific first
    if (fcc && ((plen = mutt_istr_startswith(np->data, "X-Mutt-Fcc:")) ||
                (plen = mutt_istr_startswith(np->data, "Mutt-Fcc:")) ||
                (plen = mutt_istr_startswith(np->data, "fcc:"))))
    {
      const char *p = mutt_str_skip_email_wsp(np->data + plen);
      if (*p)
      {
        buf_strcpy(fcc, p);
        buf_pretty_mailbox(fcc);
      }
      keep = false;
    }
    // Check for header names: most specific first
    else if ((plen = mutt_istr_startswith(np->data, "X-Mutt-Attach:")) ||
             (plen = mutt_istr_startswith(np->data, "Mutt-Attach:")) ||
             (plen = mutt_istr_startswith(np->data, "attach:")))
    {
      struct Body *body2 = NULL;
      struct Body *parts = NULL;
 
      const char *p = mutt_str_skip_email_wsp(np->data + plen);
      if (*p)
      {
        buf_reset(path);
        for (; (p[0] != '\0') && (p[0] != ' ') && (p[0] != '\t'); p++)
        {
          if (p[0] == '\\')
          {
            if (p[1] == '\0')
              break;
            p++;
          }
          buf_addch(path, *p);
        }
        p = mutt_str_skip_email_wsp(p);
 
        buf_expand_path(path);
        body2 = mutt_make_file_attach(buf_string(path), NeoMutt->sub);
        if (body2)
        {
          body2->description = mutt_str_dup(p);
          for (parts = e->body; parts->next; parts = parts->next)
            ; // do nothing
 
          parts->next = body2;
        }
        else
        {
          buf_pretty_mailbox(path);
          mutt_error(_("%s: unable to attach file"), buf_string(path));
        }
      }
      keep = false;
    }
    // Check for header names: most specific first
    else if (((WithCrypto & APPLICATION_PGP) != 0) &&
             ((plen = mutt_istr_startswith(np->data, "X-Mutt-PGP:")) ||
              (plen = mutt_istr_startswith(np->data, "Mutt-PGP:")) ||
              (plen = mutt_istr_startswith(np->data, "pgp:"))))
    {
      SecurityFlags sec = mutt_parse_crypt_hdr(np->data + plen, false, APPLICATION_PGP);
      if (sec != SEC_NO_FLAGS)
        sec |= APPLICATION_PGP;
      if (sec != e->security)
      {
        e->security = sec;
        notify_send(e->notify, NT_EMAIL, NT_EMAIL_CHANGE, NULL);
      }
      keep = false;
    }
    // Check for header names: most specific first
    else if (((WithCrypto & APPLICATION_SMIME) != 0) &&
             ((plen = mutt_istr_startswith(np->data, "X-Mutt-SMIME:")) ||
              (plen = mutt_istr_startswith(np->data, "Mutt-SMIME:")) ||
              (plen = mutt_istr_startswith(np->data, "smime:"))))
    {
      SecurityFlags sec = mutt_parse_crypt_hdr(np->data + plen, false, APPLICATION_SMIME);
      if (sec != SEC_NO_FLAGS)
        sec |= APPLICATION_SMIME;
      if (sec != e->security)
      {
        e->security = sec;
        notify_send(e->notify, NT_EMAIL, NT_EMAIL_CHANGE, NULL);
      }
      keep = false;
    }
#ifdef MIXMASTER
    // Check for header names: most specific first
    else if ((plen = mutt_istr_startswith(np->data, "X-Mutt-Mix:")) ||
             (plen = mutt_istr_startswith(np->data, "Mutt-Mix:")))
    {
      mutt_list_free(&e->chain);
 
      char *t = strtok(np->data + plen, ", \t\n");
      while (t)
      {
        mutt_list_insert_tail(&e->chain, mutt_str_dup(t));
        t = strtok(NULL, ", \t\n");
      }
      keep = false;
    }
#endif
 
    if (!keep)
    {
      STAILQ_REMOVE(&e->env->userhdrs, np, ListNode, entries);
      FREE(&np->data);
      FREE(&np);
    }
  }
 
cleanup:
  buf_pool_release(&path);
}

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mutt_make_label_hash()

void mutt_make_label_hash

(

struct Mailbox *

m

)

Create a Hash Table to store the labels.

Parameters

m

Mailbox

Definition at line 417 of file mutt_header.c.

{
  /* 131 is just a rough prime estimate of how many distinct
   * labels someone might have in a mailbox.  */
  m->label_hash = mutt_hash_new(131, MUTT_HASH_STRDUP_KEYS);
}

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mutt_label_hash_add()

void mutt_label_hash_add	(	struct Mailbox *	m,
		struct Email *	e
	)

Add a message's labels to the Hash Table.

Parameters

m	Mailbox
e	Email

Definition at line 429 of file mutt_header.c.

{
  if (!m || !m->label_hash)
    return;
  if (e->env->x_label)
    label_ref_inc(m, e->env->x_label);
}

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mutt_label_hash_remove()

void mutt_label_hash_remove	(	struct Mailbox *	m,
		struct Email *	e
	)

Remove a message's labels from the Hash Table.

Parameters

m	Mailbox
e	Email

Definition at line 442 of file mutt_header.c.

{
  if (!m || !m->label_hash)
    return;
  if (e->env->x_label)
    label_ref_dec(m, e->env->x_label);
}

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