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muttlib.c
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/**
* @file
* Some miscellaneous functions
*
* @authors
* Copyright (C) 1996-2000,2007,2010,2013 Michael R. Elkins <[email protected]>
* Copyright (C) 1999-2008 Thomas Roessler <[email protected]>
*
* @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/>.
*/
#include "config.h"
#include <stddef.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <libgen.h>
#ifdef ENABLE_NLS
#include <libintl.h>
#endif
#include <limits.h>
#include <pwd.h>
#include <regex.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
#include <wchar.h>
#include "mutt.h"
#include "address.h"
#include "alias.h"
#include "body.h"
#include "charset.h"
#include "envelope.h"
#include "filter.h"
#include "format_flags.h"
#include "globals.h"
#include "header.h"
#include "lib/lib.h"
#include "list.h"
#include "mailbox.h"
#include "mime.h"
#include "mutt.h"
#include "mutt_curses.h"
#include "mutt_regex.h"
#include "mx.h"
#include "ncrypt/ncrypt.h"
#include "options.h"
#include "parameter.h"
#include "protos.h"
#include "rfc822.h"
#include "url.h"
#ifdef USE_IMAP
#include "imap/imap.h"
#endif
#ifdef HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
static const char *xdg_env_vars[] = {
[XDG_CONFIG_HOME] = "XDG_CONFIG_HOME",
[XDG_CONFIG_DIRS] = "XDG_CONFIG_DIRS",
};
static const char *xdg_defaults[] = {
[XDG_CONFIG_HOME] = "~/.config", [XDG_CONFIG_DIRS] = "/etc/xdg",
};
/**
* mutt_adv_mktemp - Advanced mktemp(3)
*
* Modified by blong to accept a "suggestion" for file name. If that file
* exists, then construct one with unique name but keep any extension. This
* might fail, I guess.
*/
void mutt_adv_mktemp(char *s, size_t l)
{
char prefix[_POSIX_PATH_MAX];
char *suffix = NULL;
struct stat sb;
if (s[0] == '\0')
{
mutt_mktemp(s, l);
}
else
{
strfcpy(prefix, s, sizeof(prefix));
mutt_sanitize_filename(prefix, 1);
snprintf(s, l, "%s/%s", NONULL(TempDir), prefix);
if (lstat(s, &sb) == -1 && errno == ENOENT)
return;
if ((suffix = strrchr(prefix, '.')) != NULL)
{
*suffix = 0;
suffix++;
}
mutt_mktemp_pfx_sfx(s, l, prefix, suffix);
}
}
int mutt_remove_from_rx_list(struct RxList **l, const char *str)
{
struct RxList *p = NULL, *last = NULL;
int rv = -1;
if (mutt_strcmp("*", str) == 0)
{
mutt_free_rx_list(l); /* ``unCMD *'' means delete all current entries */
rv = 0;
}
else
{
p = *l;
last = NULL;
while (p)
{
if (mutt_strcasecmp(str, p->rx->pattern) == 0)
{
mutt_free_regexp(&p->rx);
if (last)
last->next = p->next;
else
(*l) = p->next;
FREE(&p);
rv = 0;
}
else
{
last = p;
p = p->next;
}
}
}
return rv;
}
void mutt_free_header(struct Header **h)
{
if (!h || !*h)
return;
mutt_free_envelope(&(*h)->env);
mutt_free_body(&(*h)->content);
FREE(&(*h)->maildir_flags);
FREE(&(*h)->tree);
FREE(&(*h)->path);
#ifdef MIXMASTER
mutt_list_free(&(*h)->chain);
#endif
#if defined(USE_POP) || defined(USE_IMAP) || defined(USE_NNTP) || defined(USE_NOTMUCH)
if ((*h)->free_cb)
(*h)->free_cb(*h);
FREE(&(*h)->data);
#endif
FREE(h);
}
/**
* mutt_matches_ignore - Does the string match the ignore list
*
* checks Ignore and UnIgnore using mutt_list_match
*/
int mutt_matches_ignore(const char *s)
{
return mutt_list_match(s, &Ignore) && !mutt_list_match(s, &UnIgnore);
}
char *mutt_expand_path(char *s, size_t slen)
{
return _mutt_expand_path(s, slen, 0);
}
char *_mutt_expand_path(char *s, size_t slen, int rx)
{
char p[_POSIX_PATH_MAX] = "";
char q[_POSIX_PATH_MAX] = "";
char tmp[_POSIX_PATH_MAX];
char *t = NULL;
char *tail = "";
bool recurse = false;
do
{
recurse = false;
switch (*s)
{
case '~':
{
if (*(s + 1) == '/' || *(s + 1) == 0)
{
strfcpy(p, NONULL(HomeDir), sizeof(p));
tail = s + 1;
}
else
{
struct passwd *pw = NULL;
if ((t = strchr(s + 1, '/')))
*t = 0;
if ((pw = getpwnam(s + 1)))
{
strfcpy(p, pw->pw_dir, sizeof(p));
if (t)
{
*t = '/';
tail = t;
}
else
tail = "";
}
else
{
/* user not found! */
if (t)
*t = '/';
*p = '\0';
tail = s;
}
}
}
break;
case '=':
case '+':
{
#ifdef USE_IMAP
/* if folder = {host} or imap[s]://host/: don't append slash */
if (mx_is_imap(NONULL(Maildir)) && (Maildir[strlen(Maildir) - 1] == '}' ||
Maildir[strlen(Maildir) - 1] == '/'))
strfcpy(p, NONULL(Maildir), sizeof(p));
else
#endif
#ifdef USE_NOTMUCH
if (mx_is_notmuch(NONULL(Maildir)))
strfcpy(p, NONULL(Maildir), sizeof(p));
else
#endif
if (Maildir && *Maildir && Maildir[strlen(Maildir) - 1] == '/')
strfcpy(p, NONULL(Maildir), sizeof(p));
else
snprintf(p, sizeof(p), "%s/", NONULL(Maildir));
tail = s + 1;
}
break;
/* elm compatibility, @ expands alias to user name */
case '@':
{
struct Header *h = NULL;
struct Address *alias = NULL;
if ((alias = mutt_lookup_alias(s + 1)))
{
h = mutt_new_header();
h->env = mutt_new_envelope();
h->env->from = h->env->to = alias;
mutt_default_save(p, sizeof(p), h);
h->env->from = h->env->to = NULL;
mutt_free_header(&h);
/* Avoid infinite recursion if the resulting folder starts with '@' */
if (*p != '@')
recurse = true;
tail = "";
}
}
break;
case '>':
{
strfcpy(p, NONULL(Inbox), sizeof(p));
tail = s + 1;
}
break;
case '<':
{
strfcpy(p, NONULL(Outbox), sizeof(p));
tail = s + 1;
}
break;
case '!':
{
if (*(s + 1) == '!')
{
strfcpy(p, NONULL(LastFolder), sizeof(p));
tail = s + 2;
}
else
{
strfcpy(p, NONULL(SpoolFile), sizeof(p));
tail = s + 1;
}
}
break;
case '-':
{
strfcpy(p, NONULL(LastFolder), sizeof(p));
tail = s + 1;
}
break;
case '^':
{
strfcpy(p, NONULL(CurrentFolder), sizeof(p));
tail = s + 1;
}
break;
default:
{
*p = '\0';
tail = s;
}
}
if (rx && *p && !recurse)
{
mutt_rx_sanitize_string(q, sizeof(q), p);
snprintf(tmp, sizeof(tmp), "%s%s", q, tail);
}
else
snprintf(tmp, sizeof(tmp), "%s%s", p, tail);
strfcpy(s, tmp, slen);
} while (recurse);
#ifdef USE_IMAP
/* Rewrite IMAP path in canonical form - aids in string comparisons of
* folders. May possibly fail, in which case s should be the same. */
if (mx_is_imap(s))
imap_expand_path(s, slen);
#endif
return s;
}
/**
* mutt_gecos_name - Lookup a user's real name in /etc/passwd
*
* Extract the real name from /etc/passwd's GECOS field. When set, honor the
* regular expression in GecosMask, otherwise assume that the GECOS field is a
* comma-separated list.
* Replace "&" by a capitalized version of the user's login name.
*/
char *mutt_gecos_name(char *dest, size_t destlen, struct passwd *pw)
{
regmatch_t pat_match[1];
size_t pwnl;
char *p = NULL;
if (!pw || !pw->pw_gecos)
return NULL;
memset(dest, 0, destlen);
if (GecosMask.rx)
{
if (regexec(GecosMask.rx, pw->pw_gecos, 1, pat_match, 0) == 0)
strfcpy(dest, pw->pw_gecos + pat_match[0].rm_so,
MIN(pat_match[0].rm_eo - pat_match[0].rm_so + 1, destlen));
}
else if ((p = strchr(pw->pw_gecos, ',')))
strfcpy(dest, pw->pw_gecos, MIN(destlen, p - pw->pw_gecos + 1));
else
strfcpy(dest, pw->pw_gecos, destlen);
pwnl = strlen(pw->pw_name);
for (int idx = 0; dest[idx]; idx++)
{
if (dest[idx] == '&')
{
memmove(&dest[idx + pwnl], &dest[idx + 1],
MAX((ssize_t)(destlen - idx - pwnl - 1), 0));
memcpy(&dest[idx], pw->pw_name, MIN(destlen - idx - 1, pwnl));
dest[idx] = toupper((unsigned char) dest[idx]);
}
}
return dest;
}
/**
* mutt_needs_mailcap - Does this type need a mailcap entry do display
* @param m Attachment body to be displayed
* @retval true Mutt requires a mailcap entry to display
* @retval false otherwise
*/
bool mutt_needs_mailcap(struct Body *m)
{
switch (m->type)
{
case TYPETEXT:
if (mutt_strcasecmp("plain", m->subtype) == 0)
return false;
break;
case TYPEAPPLICATION:
if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp(m))
return false;
if ((WithCrypto & APPLICATION_SMIME) && mutt_is_application_smime(m))
return false;
break;
case TYPEMULTIPART:
case TYPEMESSAGE:
return false;
}
return true;
}
bool mutt_is_text_part(struct Body *b)
{
int t = b->type;
char *s = b->subtype;
if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp(b))
return false;
if (t == TYPETEXT)
return true;
if (t == TYPEMESSAGE)
{
if (mutt_strcasecmp("delivery-status", s) == 0)
return true;
}
if ((WithCrypto & APPLICATION_PGP) && t == TYPEAPPLICATION)
{
if (mutt_strcasecmp("pgp-keys", s) == 0)
return true;
}
return false;
}
static FILE *frandom;
static void mutt_randbuf(void *out, size_t len)
{
if (len > 1048576)
{
mutt_error(_("mutt_randbuf len=%zu"), len);
exit(1);
}
/* XXX switch to HAVE_GETRANDOM and getrandom() in about 2017 */
#if defined(SYS_getrandom) && defined(__linux__)
long ret;
do
{
ret = syscall(SYS_getrandom, out, len, 0, 0, 0, 0);
} while ((ret == -1) && (errno == EINTR));
if (ret == len)
return;
/* let's try urandom in case we're on an old kernel, or the user has
* configured selinux, seccomp or something to not allow getrandom */
#endif
if (!frandom)
{
frandom = fopen("/dev/urandom", "rb");
if (!frandom)
{
mutt_error(_("open /dev/urandom: %s"), strerror(errno));
exit(1);
}
setbuf(frandom, NULL);
}
if (fread(out, 1, len, frandom) != len)
{
mutt_error(_("read /dev/urandom: %s"), strerror(errno));
exit(1);
}
}
static const unsigned char base32[] = "abcdefghijklmnopqrstuvwxyz234567";
void mutt_rand_base32(void *out, size_t len)
{
uint8_t *p = out;
mutt_randbuf(p, len);
for (size_t pos = 0; pos < len; pos++)
p[pos] = base32[p[pos] % 32];
}
uint32_t mutt_rand32(void)
{
uint32_t ret;
mutt_randbuf(&ret, sizeof(ret));
return ret;
}
uint64_t mutt_rand64(void)
{
uint64_t ret;
mutt_randbuf(&ret, sizeof(ret));
return ret;
}
void _mutt_mktemp(char *s, size_t slen, const char *prefix, const char *suffix,
const char *src, int line)
{
size_t n = snprintf(s, slen, "%s/%s-%s-%d-%d-%" PRIu64 "%s%s", NONULL(TempDir),
NONULL(prefix), NONULL(Hostname), (int) getuid(), (int) getpid(),
mutt_rand64(), suffix ? "." : "", NONULL(suffix));
if (n >= slen)
mutt_debug(1, "%s:%d: ERROR: insufficient buffer space to hold temporary "
"filename! slen=%zu but need %zu\n",
src, line, slen, n);
mutt_debug(3, "%s:%d: mutt_mktemp returns \"%s\".\n", src, line, s);
if (unlink(s) && errno != ENOENT)
mutt_debug(1, "%s:%d: ERROR: unlink(\"%s\"): %s (errno %d)\n", src, line, s,
strerror(errno), errno);
}
void mutt_free_alias(struct Alias **p)
{
struct Alias *t = NULL;
while (*p)
{
t = *p;
*p = (*p)->next;
mutt_alias_delete_reverse(t);
FREE(&t->name);
rfc822_free_address(&t->addr);
FREE(&t);
}
}
/**
* mutt_pretty_mailbox - Shorten a mailbox path using '~' or '='
*
* Collapse the pathname using ~ or = when possible
*/
void mutt_pretty_mailbox(char *s, size_t buflen)
{
char *p = s, *q = s;
size_t len;
enum UrlScheme scheme;
char tmp[PATH_MAX];
scheme = url_check_scheme(s);
#ifdef USE_IMAP
if (scheme == U_IMAP || scheme == U_IMAPS)
{
imap_pretty_mailbox(s);
return;
}
#endif
#ifdef USE_NOTMUCH
if (scheme == U_NOTMUCH)
return;
#endif
/* if s is an url, only collapse path component */
if (scheme != U_UNKNOWN)
{
p = strchr(s, ':') + 1;
if (strncmp(p, "//", 2) == 0)
q = strchr(p + 2, '/');
if (!q)
q = strchr(p, '\0');
p = q;
}
/* cleanup path */
if (strstr(p, "//") || strstr(p, "/./"))
{
/* first attempt to collapse the pathname, this is more
* lightweight than realpath() and doesn't resolve links
*/
while (*p)
{
if (*p == '/' && p[1] == '/')
{
*q++ = '/';
p += 2;
}
else if (p[0] == '/' && p[1] == '.' && p[2] == '/')
{
*q++ = '/';
p += 3;
}
else
*q++ = *p++;
}
*q = 0;
}
else if (strstr(p, "..") && (scheme == U_UNKNOWN || scheme == U_FILE) && realpath(p, tmp))
strfcpy(p, tmp, buflen - (p - s));
if ((mutt_strncmp(s, Maildir, (len = mutt_strlen(Maildir))) == 0) && s[len] == '/')
{
*s++ = '=';
memmove(s, s + len, mutt_strlen(s + len) + 1);
}
else if ((mutt_strncmp(s, HomeDir, (len = mutt_strlen(HomeDir))) == 0) && s[len] == '/')
{
*s++ = '~';
memmove(s, s + len - 1, mutt_strlen(s + len - 1) + 1);
}
}
void mutt_pretty_size(char *s, size_t len, LOFF_T n)
{
if (n == 0)
strfcpy(s, "0K", len);
else if (n < 10189) /* 0.1K - 9.9K */
snprintf(s, len, "%3.1fK", (n < 103) ? 0.1 : n / 1024.0);
else if (n < 1023949) /* 10K - 999K */
{
/* 51 is magic which causes 10189/10240 to be rounded up to 10 */
snprintf(s, len, OFF_T_FMT "K", (n + 51) / 1024);
}
else if (n < 10433332) /* 1.0M - 9.9M */
snprintf(s, len, "%3.1fM", n / 1048576.0);
else /* 10M+ */
{
/* (10433332 + 52428) / 1048576 = 10 */
snprintf(s, len, OFF_T_FMT "M", (n + 52428) / 1048576);
}
}
void mutt_expand_file_fmt(char *dest, size_t destlen, const char *fmt, const char *src)
{
char tmp[LONG_STRING];
mutt_quote_filename(tmp, sizeof(tmp), src);
mutt_expand_fmt(dest, destlen, fmt, tmp);
}
void mutt_expand_fmt(char *dest, size_t destlen, const char *fmt, const char *src)
{
const char *p = NULL;
char *d = NULL;
size_t slen;
bool found = false;
slen = mutt_strlen(src);
destlen--;
for (p = fmt, d = dest; destlen && *p; p++)
{
if (*p == '%')
{
switch (p[1])
{
case '%':
*d++ = *p++;
destlen--;
break;
case 's':
found = true;
strfcpy(d, src, destlen + 1);
d += destlen > slen ? slen : destlen;
destlen -= destlen > slen ? slen : destlen;
p++;
break;
default:
*d++ = *p;
destlen--;
break;
}
}
else
{
*d++ = *p;
destlen--;
}
}
*d = '\0';
if (!found && destlen > 0)
{
safe_strcat(dest, destlen, " ");
safe_strcat(dest, destlen, src);
}
}
/**
* mutt_check_overwrite - Ask the user if overwriting is necessary
* @retval 0 on success
* @retval -1 on abort
* @retval 1 on error
*/
int mutt_check_overwrite(const char *attname, const char *path, char *fname,
size_t flen, int *append, char **directory)
{
int rc = 0;
char tmp[_POSIX_PATH_MAX];
struct stat st;
strfcpy(fname, path, flen);
if (access(fname, F_OK) != 0)
return 0;
if (stat(fname, &st) != 0)
return -1;
if (S_ISDIR(st.st_mode))
{
if (directory)
{
switch (mutt_multi_choice
/* L10N:
Means "The path you specified as the destination file is a directory."
See the msgid "Save to file: " (alias.c, recvattach.c) */
(_("File is a directory, save under it? [(y)es, (n)o, (a)ll]"), _("yna")))
{
case 3: /* all */
mutt_str_replace(directory, fname);
break;
case 1: /* yes */
FREE(directory);
break;
case -1: /* abort */
FREE(directory);
return -1;
case 2: /* no */
FREE(directory);
return 1;
}
}
/* L10N:
Means "The path you specified as the destination file is a directory."
See the msgid "Save to file: " (alias.c, recvattach.c) */
else if ((rc = mutt_yesorno(_("File is a directory, save under it?"), MUTT_YES)) != MUTT_YES)
return (rc == MUTT_NO) ? 1 : -1;
strfcpy(tmp, mutt_basename(NONULL(attname)), sizeof(tmp));
if (mutt_get_field(_("File under directory: "), tmp, sizeof(tmp),
MUTT_FILE | MUTT_CLEAR) != 0 ||
!tmp[0])
return -1;
mutt_concat_path(fname, path, tmp, flen);
}
if (*append == 0 && access(fname, F_OK) == 0)
{
switch (mutt_multi_choice(
_("File exists, (o)verwrite, (a)ppend, or (c)ancel?"), _("oac")))
{
case -1: /* abort */
return -1;
case 3: /* cancel */
return 1;
case 2: /* append */
*append = MUTT_SAVE_APPEND;
break;
case 1: /* overwrite */
*append = MUTT_SAVE_OVERWRITE;
break;
}
}
return 0;
}
void mutt_save_path(char *d, size_t dsize, struct Address *a)
{
if (a && a->mailbox)
{
strfcpy(d, a->mailbox, dsize);
if (!option(OPT_SAVE_ADDRESS))
{
char *p = NULL;
if ((p = strpbrk(d, "%@")))
*p = 0;
}
mutt_strlower(d);
}
else
*d = 0;
}
void mutt_safe_path(char *s, size_t l, struct Address *a)
{
char *p = NULL;
mutt_save_path(s, l, a);
for (p = s; *p; p++)
if (*p == '/' || ISSPACE(*p) || !IsPrint((unsigned char) *p))
*p = '_';
}
/**
* mutt_apply_replace - Apply replacements to a buffer
*
* Note this function uses a fixed size buffer of LONG_STRING and so
* should only be used for visual modifications, such as disp_subj.
*/
char *mutt_apply_replace(char *dbuf, size_t dlen, char *sbuf, struct ReplaceList *rlist)
{
struct ReplaceList *l = NULL;
static regmatch_t *pmatch = NULL;
static int nmatch = 0;
static char twinbuf[2][LONG_STRING];
int switcher = 0;
char *p = NULL;
int i, n;
size_t cpysize, tlen;
char *src = NULL, *dst = NULL;
if (dbuf && dlen)
dbuf[0] = '\0';
if (sbuf == NULL || *sbuf == '\0' || (dbuf && !dlen))
return dbuf;
twinbuf[0][0] = '\0';
twinbuf[1][0] = '\0';
src = twinbuf[switcher];
dst = src;
strfcpy(src, sbuf, LONG_STRING);
for (l = rlist; l; l = l->next)
{
/* If this pattern needs more matches, expand pmatch. */
if (l->nmatch > nmatch)
{
safe_realloc(&pmatch, l->nmatch * sizeof(regmatch_t));
nmatch = l->nmatch;
}
if (regexec(l->rx->rx, src, l->nmatch, pmatch, 0) == 0)
{
tlen = 0;
switcher ^= 1;
dst = twinbuf[switcher];
mutt_debug(5, "mutt_apply_replace: %s matches %s\n", src, l->rx->pattern);
/* Copy into other twinbuf with substitutions */
if (l->template)
{
for (p = l->template; *p && (tlen < LONG_STRING - 1);)
{
if (*p == '%')
{
p++;
if (*p == 'L')
{
p++;
cpysize = MIN(pmatch[0].rm_so, LONG_STRING - tlen - 1);
strncpy(&dst[tlen], src, cpysize);
tlen += cpysize;
}
else if (*p == 'R')
{
p++;
cpysize = MIN(strlen(src) - pmatch[0].rm_eo, LONG_STRING - tlen - 1);
strncpy(&dst[tlen], &src[pmatch[0].rm_eo], cpysize);
tlen += cpysize;
}
else
{
n = strtoul(p, &p, 10); /* get subst number */
while (isdigit((unsigned char) *p)) /* skip subst token */
p++;
for (i = pmatch[n].rm_so;
(i < pmatch[n].rm_eo) && (tlen < LONG_STRING - 1); i++)
dst[tlen++] = src[i];
}
}
else
dst[tlen++] = *p++;
}
}
dst[tlen] = '\0';
mutt_debug(5, "mutt_apply_replace: subst %s\n", dst);
}
src = dst;
}
if (dbuf)
strfcpy(dbuf, dst, dlen);
else
dbuf = safe_strdup(dst);
return dbuf;
}
/**
* mutt_expando_format - Expand expandos (%x) in a string
* @param dest output buffer
* @param destlen output buffer len
* @param col starting column (nonzero when called recursively)
* @param cols maximum columns
* @param src template string
* @param callback callback for processing
* @param data callback data
* @param flags callback flags
*/
void mutt_expando_format(char *dest, size_t destlen, size_t col, int cols,
const char *src, format_t *callback,
unsigned long data, enum FormatFlag flags)
{
char prefix[SHORT_STRING], buf[LONG_STRING], *cp = NULL, *wptr = dest, ch;
char ifstring[SHORT_STRING], elsestring[SHORT_STRING];
size_t wlen, count, len, wid;
pid_t pid;
FILE *filter = NULL;
int n;
char *recycler = NULL;
char src2[STRING];
strfcpy(src2, src, mutt_strlen(src) + 1);
src = src2;
prefix[0] = '\0';
destlen--; /* save room for the terminal \0 */
wlen = ((flags & MUTT_FORMAT_ARROWCURSOR) && option(OPT_ARROW_CURSOR)) ? 3 : 0;
col += wlen;
if ((flags & MUTT_FORMAT_NOFILTER) == 0)
{
int off = -1;
/* Do not consider filters if no pipe at end */
n = mutt_strlen(src);
if (n > 1 && src[n - 1] == '|')
{
/* Scan backwards for backslashes */
off = n;
while (off > 0 && src[off - 2] == '\\')
off--;
}
/* If number of backslashes is even, the pipe is real. */
/* n-off is the number of backslashes. */
if (off > 0 && ((n - off) % 2) == 0)
{
struct Buffer *srcbuf = NULL, *word = NULL, *command = NULL;
char srccopy[LONG_STRING];
#ifdef DEBUG
int i = 0;
#endif
mutt_debug(3, "fmtpipe = %s\n", src);
strncpy(srccopy, src, n);
srccopy[n - 1] = '\0';
/* prepare BUFFERs */
srcbuf = mutt_buffer_from(srccopy);
srcbuf->dptr = srcbuf->data;
word = mutt_buffer_new();
command = mutt_buffer_new();
/* Iterate expansions across successive arguments */
do
{
char *p = NULL;
/* Extract the command name and copy to command line */
mutt_debug(3, "fmtpipe +++: %s\n", srcbuf->dptr);
if (word->data)
*word->data = '\0';
mutt_extract_token(word, srcbuf, 0);
mutt_debug(3, "fmtpipe %2d: %s\n", i++, word->data);
mutt_buffer_addch(command, '\'');
mutt_expando_format(buf, sizeof(buf), 0, cols, word->data, callback, data,
flags | MUTT_FORMAT_NOFILTER);
for (p = buf; p && *p; p++)
{
if (*p == '\'')
/* shell quoting doesn't permit escaping a single quote within