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bintrans(1): RFC2047 variant of quoted print

Browse source 
MFC After:	1 week
Reviewed by:	pstref
Differential Revision:	https://reviews.freebsd.org/D48381
This commit is contained in:
Baptiste Daroussin 2025-01-08 13:39:30 +01:00
parent a8d9bd3fa5
commit beab8b1ddf
2 changed files with 25 additions and 9 deletions
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2
usr.bin/bintrans/bintrans.1
View file

@ -236,6 +236,8 @@ Decode.
Output to
.Ar output_file
instead of standard output.
.It fl r
Encode/Decode in RFC2047 specific variant.
.El
.Sh EXAMPLES
The following example packages up a source tree, compresses it,

32
usr.bin/bintrans/qp.c
View file

@ -51,7 +51,7 @@ decode_char(const char *s)
static void
decode_quoted_printable(const char *body, FILE *fpo)
decode_quoted_printable(const char *body, FILE *fpo, bool rfc2047)
{
while (*body != '\0') {
switch (*body) {
@ -80,6 +80,12 @@ decode_quoted_printable(const char *body, FILE *fpo)
fputc(decode_char(body), fpo);
body += 2;
break;
case '_':
if (rfc2047) {
fputc(0x20, fpo);
break;
}
/* FALLTHROUGH */
default:
fputc(*body, fpo);
break;
@ -89,7 +95,7 @@ decode_quoted_printable(const char *body, FILE *fpo)
}
static void
encode_quoted_printable(const char *body, FILE *fpo)
encode_quoted_printable(const char *body, FILE *fpo, bool rfc2047)
{
const char *end = body + strlen(body);
size_t linelen = 0;
@ -111,7 +117,10 @@ encode_quoted_printable(const char *body, FILE *fpo)
if ((*body == ' ' || *body == '\t') &&
body + 1 < end &&
(body[1] != '\n' && body[1] != '\r')) {
fputc(*body, fpo);
if (*body == 0x20 && rfc2047)
fputc('_', fpo);
else
fputc(*body, fpo);
prev = *body;
} else {
fprintf(fpo, "=%02X", (unsigned char)*body);
@ -135,16 +144,16 @@ encode_quoted_printable(const char *body, FILE *fpo)
}
static void
qp(FILE *fp, FILE *fpo, bool encode)
qp(FILE *fp, FILE *fpo, bool encode, bool rfc2047)
{
char *line = NULL;
size_t linecap = 0;
void (*codec)(const char *line, FILE *f);
void (*codec)(const char *line, FILE *f, bool rfc2047);
codec = encode ? encode_quoted_printable : decode_quoted_printable ;
while (getline(&line, &linecap, fp) > 0)
codec(line, fpo);
codec(line, fpo, rfc2047);
free(line);
}
@ -152,7 +161,7 @@ static void
usage(void)
{
fprintf(stderr,
"usage: bintrans qp [-d] [-o outputfile] [file name]\n");
"usage: bintrans qp [-d] [-r] [-o outputfile] [file name]\n");
}
int
@ -160,6 +169,7 @@ main_quotedprintable(int argc, char *argv[])
{
int ch;
bool encode = true;
bool rfc2047 = false;
FILE *fp = stdin;
FILE *fpo = stdout;
@ -167,10 +177,11 @@ main_quotedprintable(int argc, char *argv[])
{
{ "decode", no_argument, NULL, 'd'},
{ "output", required_argument, NULL, 'o'},
{ "rfc2047", no_argument, NULL, 'r'},
{NULL, no_argument, NULL, 0}
};
while ((ch = getopt_long(argc, argv, "do:u", opts, NULL)) != -1) {
while ((ch = getopt_long(argc, argv, "do:ru", opts, NULL)) != -1) {
switch(ch) {
case 'o':
fpo = fopen(optarg, "w");
@ -184,6 +195,9 @@ main_quotedprintable(int argc, char *argv[])
case 'd':
encode = false;
break;
case 'r':
rfc2047 = true;
break;
default:
usage();
exit(EXIT_FAILURE);
@ -198,7 +212,7 @@ main_quotedprintable(int argc, char *argv[])
exit(EXIT_FAILURE);
}
}
qp(fp, fpo, encode);
qp(fp, fpo, encode, rfc2047);
return (EXIT_SUCCESS);
}