/*
- * mhfixmsg.c -- rewrite a message with various tranformations
+ * mhfixmsg.c -- rewrite a message with various transformations
*
* This code is Copyright (c) 2002 and 2013, by the authors of nmh.
* See the COPYRIGHT file in the root directory of the nmh
#define MHFIXMSG_SWITCHES \
X("decodetext 8bit|7bit", 0, DECODETEXTSW) \
X("nodecodetext", 0, NDECODETEXTSW) \
+ X("decodetypes", 0, DECODETYPESW) \
+ X("crlflinebreaks", 0, CRLFLINEBREAKSSW) \
+ X("nocrlflinebreaks", 0, NCRLFLINEBREAKSSW) \
X("textcharset", 0, TEXTCHARSETSW) \
X("notextcharset", 0, NTEXTCHARSETSW) \
X("reformat", 0, REFORMATSW) \
int reformat;
int replacetextplain;
int decodetext;
+ char *decodetypes;
+ /* Whether to use CRLF linebreaks, per RFC 2046 Sec. 4.1.1, par.1. */
+ int lf_line_endings;
char *textcharset;
} fix_transformations;
int mhfixmsgsbr (CT *, const fix_transformations *, char *);
static int fix_boundary (CT *, int *);
+static int copy_input_to_output (const char *, const char *);
static int get_multipart_boundary (CT, char **);
static int replace_boundary (CT, char *, char *);
static int fix_types (CT, svector_t, int *);
static int boundary_in_content (FILE **, char *, const char *);
static void transfer_noncontent_headers (CT, CT);
static int set_ct_type (CT, int type, int subtype, int encoding);
-static int decode_text_parts (CT, int, int *);
+static int decode_text_parts (CT, int, const char *, int *);
+static int should_decode(const char *, const char *, const char *);
static int content_encoding (CT, const char **);
static int strip_crs (CT, int *);
static int convert_charsets (CT, char *, int *);
static int fix_always (CT, int *);
-static int write_content (CT, char *, char *, int, int);
-static int remove_file (char *);
+static int write_content (CT, const char *, char *, int, int);
+static void set_text_ctparams(CT, char *, int);
+static int remove_file (const char *);
static void report (char *, char *, char *, char *, ...);
static void pipeser (int);
fx.fixtypes = NULL;
fx.replacetextplain = 0;
fx.decodetext = CE_8BIT;
+ fx.decodetypes = "text,application/ics"; /* Default, per man page. */
+ fx.lf_line_endings = 0;
fx.textcharset = NULL;
if (nmh_init(argv[0], 1)) { return 1; }
case NDECODETEXTSW:
fx.decodetext = 0;
continue;
+ case DECODETYPESW:
+ if (! (cp = *argp++) || *cp == '-')
+ adios (NULL, "missing argument to %s", argp[-2]);
+ fx.decodetypes = cp;
+ continue;
+ case CRLFLINEBREAKSSW:
+ fx.lf_line_endings = 0;
+ continue;
+ case NCRLFLINEBREAKSSW:
+ fx.lf_line_endings = 1;
+ continue;
case TEXTCHARSETSW:
if (! (cp = *argp++) || (*cp == '-' && cp[1]))
adios (NULL, "missing argument to %s", argp[-2]);
}
ctp = cts;
- if ((ct = parse_mime (file))) { *ctp++ = ct; }
+ if ((ct = parse_mime (file))) {
+ set_text_ctparams(ct, fx.decodetypes, fx.lf_line_endings);
+ *ctp++ = ct;
+ } else {
+ advise (NULL, "unable to parse message from file %s", file);
+ status = NOTOK;
+
+ /* If there's an outfile, pass the input message unchanged, so the message won't
+ get dropped from a pipeline. */
+ if (outfile) {
+ /* Something went wrong. Output might be expected, such as if this were run
+ as a filter. Just copy the input to the output. */
+ if (copy_input_to_output (file, outfile) != OK) {
+ advise (NULL, "unable to copy message to %s, it might be lost\n", outfile);
+ }
+ }
+ }
} else {
/*
* message(s) are coming from a folder
char *msgnam;
msgnam = m_name (msgnum);
- if ((ct = parse_mime (msgnam))) { *ctp++ = ct; }
+ if ((ct = parse_mime (msgnam))) {
+ set_text_ctparams(ct, fx.decodetypes, fx.lf_line_endings);
+ *ctp++ = ct;
+ } else {
+ advise (NULL, "unable to parse message %s", msgnam);
+ status = NOTOK;
+
+ /* If there's an outfile, pass the input message unchanged, so the message won't
+ get dropped from a pipeline. */
+ if (outfile) {
+ /* Something went wrong. Output might be expected, such as if this were run
+ as a filter. Just copy the input to the output. */
+ const char *input_filename = path (msgnam, TFILE);
+
+ if (copy_input_to_output (input_filename, outfile) != OK) {
+ advise (NULL, "unable to copy message to %s, it might be lost\n", outfile);
+ }
+ }
+ }
}
}
ensure_text_plain (ctp, NULL, &message_mods, fx->replacetextplain);
}
if (status == OK && fx->decodetext) {
- status = decode_text_parts (*ctp, fx->decodetext, &message_mods);
+ status = decode_text_parts (*ctp, fx->decodetext, fx->decodetypes, &message_mods);
}
if (status == OK && fx->textcharset != NULL) {
status = convert_charsets (*ctp, fx->textcharset, &message_mods);
/* Something went wrong. Output might be expected, such
as if this were run as a filter. Just copy the input
to the output. */
- int in = open (input_filename, O_RDONLY);
- int out = strcmp (outfile, "-")
- ? open (outfile, O_WRONLY | O_CREAT, m_gmprot ())
- : STDOUT_FILENO;
-
- if (in != -1 && out != -1) {
- cpydata (in, out, input_filename, outfile);
- } else {
- status = NOTOK;
+ if (copy_input_to_output (input_filename, outfile) != OK) {
+ advise (NULL, "unable to copy message to %s, it might be lost\n", outfile);
}
-
- close (out);
- close (in);
}
if (modify_inplace) {
}
+/* Copy input message to output. Assumes not modifying in place, so this
+ might be running as part of a pipeline. */
+static int
+copy_input_to_output (const char *input_filename, const char *output_filename) {
+ int in = open (input_filename, O_RDONLY);
+ int out = strcmp (output_filename, "-")
+ ? open (output_filename, O_WRONLY | O_CREAT, m_gmprot ())
+ : STDOUT_FILENO;
+ int status = OK;
+
+ if (in != -1 && out != -1) {
+ cpydata (in, out, input_filename, output_filename);
+ } else {
+ status = NOTOK;
+ }
+
+ close (out);
+ close (in);
+
+ return status;
+}
+
+
static int
fix_boundary (CT *ct, int *message_mods) {
struct multipart *mp;
}
free (part_boundary);
+ } else {
+ /* Couldn't fix the boundary. Report failure so that mhfixmsg
+ doesn't modify the message. */
+ status = NOTOK;
}
+ } else {
+ /* No multipart struct, even though the content type is
+ CT_MULTIPART. Report failure so that mhfixmsg doesn't modify
+ the message. */
+ status = NOTOK;
}
}
CT mp_alt = build_multipart_alt (*ct, tp_part, CT_MULTIPART,
MULTI_ALTERNATE);
if (mp_alt) {
- struct multipart *mp =
- (struct multipart *) mp_alt->c_ctparams;
+ struct multipart *mp = (struct multipart *) mp_alt->c_ctparams;
if (mp && mp->mp_parts) {
mp->mp_parts->mp_part = tp_part;
status = NOTOK;
}
} else {
- status = NOTOK;
+ /* Not an error if text/plain couldn't be built. */
}
return status;
static int
-decode_text_parts (CT ct, int encoding, int *message_mods) {
+decode_text_parts (CT ct, int encoding, const char *decodetypes, int *message_mods) {
int status = OK;
+ int lf_line_endings = 0;
switch (ct->c_type) {
- case CT_TEXT:
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ /* Should check to see if the body for this part is encoded?
+ For now, it gets passed along as-is by InitMultiPart(). */
+ for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
+ status = decode_text_parts (part->mp_part, encoding, decodetypes, message_mods);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ status = decode_text_parts (e->eb_content, encoding, decodetypes, message_mods);
+ }
+ break;
+
+ default:
+ if (! should_decode(decodetypes, ct->c_ctinfo.ci_type, ct->c_ctinfo.ci_subtype)) {
+ break;
+ }
+
+ lf_line_endings =
+ ct->c_ctparams && ((struct text *) ct->c_ctparams)->lf_line_endings;
+
switch (ct->c_encoding) {
case CE_BASE64:
case CE_QUOTED: {
report (NULL, ct->c_partno, ct->c_file, "decode%s",
ct->c_ctline ? ct->c_ctline : "");
}
- strip_crs (ct, message_mods);
+ if (lf_line_endings) {
+ strip_crs (ct, message_mods);
+ }
} else {
status = NOTOK;
}
}
case CE_8BIT:
case CE_7BIT:
- strip_crs (ct, message_mods);
+ if (lf_line_endings) {
+ strip_crs (ct, message_mods);
+ }
break;
default:
break;
}
break;
-
- case CT_MULTIPART: {
- struct multipart *m = (struct multipart *) ct->c_ctparams;
- struct part *part;
-
- /* Should check to see if the body for this part is encoded?
- For now, it gets passed along as-is by InitMultiPart(). */
- for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
- status = decode_text_parts (part->mp_part, encoding, message_mods);
- }
- break;
}
- case CT_MESSAGE:
- if (ct->c_subtype == MESSAGE_EXTERNAL) {
- struct exbody *e = (struct exbody *) ct->c_ctparams;
+ return status;
+}
- status = decode_text_parts (e->eb_content, encoding, message_mods);
- }
- break;
- default:
- break;
+/* Determine if the part with type[/subtype] should be decoded, according to
+ decodetypes (which came from the -decodetypes switch). */
+static int
+should_decode(const char *decodetypes, const char *type, const char *subtype) {
+ /* Quick search for matching type[/subtype] in decodetypes: bracket
+ decodetypes with commas, then search for ,type, and ,type/subtype, in
+ it. */
+
+ int found_match = 0;
+ char *delimited_decodetypes = concat(",", decodetypes, ",", NULL);
+ char *delimited_type = concat(",", type, ",", NULL);
+
+ if (nmh_strcasestr(delimited_decodetypes, delimited_type)) {
+ found_match = 1;
+ } else if (subtype != NULL) {
+ char *delimited_type_subtype =
+ concat(",", type, "/", subtype, ",", NULL);
+
+ if (nmh_strcasestr(delimited_decodetypes, delimited_type_subtype)) {
+ found_match = 1;
+ }
+ free(delimited_type_subtype);
}
- return status;
+ free(delimited_type);
+ free(delimited_decodetypes);
+
+ return found_match;
}
static int
-write_content (CT ct, char *input_filename, char *outfile, int modify_inplace,
+write_content (CT ct, const char *input_filename, char *outfile, int modify_inplace,
int message_mods) {
int status = OK;
}
+/*
+ * parse_mime() does not set lf_line_endings in struct text, so use this function to do it.
+ * It touches the parts the decodetypes identifies.
+ */
+static void
+set_text_ctparams(CT ct, char *decodetypes, int lf_line_endings) {
+ switch (ct->c_type) {
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ for (part = m->mp_parts; part; part = part->mp_next) {
+ set_text_ctparams(part->mp_part, decodetypes, lf_line_endings);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ set_text_ctparams(e->eb_content, decodetypes, lf_line_endings);
+ }
+ break;
+
+ default:
+ if (should_decode(decodetypes, ct->c_ctinfo.ci_type, ct->c_ctinfo.ci_subtype)) {
+ if (ct->c_ctparams == NULL) {
+ if ((ct->c_ctparams = (struct text *) mh_xcalloc (1, sizeof (struct text))) == NULL) {
+ adios (NULL, "out of memory");
+ }
+ }
+ ((struct text *) ct->c_ctparams)->lf_line_endings = lf_line_endings;
+ }
+ }
+}
+
+
/*
* If "rmmproc" is defined, call that to remove the file. Otherwise,
* use the standard MH backup file.
*/
static int
-remove_file (char *file) {
+remove_file (const char *file) {
if (rmmproc) {
char *rmm_command = concat (rmmproc, " ", file, NULL);
int status = system (rmm_command);
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