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Code

Fix multiple issues in util_shellquote

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This commit is contained in:
Moritz Grimm 2017-09-25 17:09:38 +02:00
parent 1d0b9d4801
commit cb997e549c
3 changed files with 27 additions and 18 deletions
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12
src/ezstream.c
View File

@ -116,22 +116,22 @@ _build_reencode_cmd(const char *extension, const char *filename,
}
tmp = util_utf82char(mdata_get_artist(md));
artist = util_shellquote(tmp);
artist = util_shellquote(tmp, 0);
xfree(tmp);
tmp = util_utf82char(mdata_get_album(md));
album = util_shellquote(tmp);
album = util_shellquote(tmp, 0);
xfree(tmp);
tmp = util_utf82char(mdata_get_title(md));
title = util_shellquote(tmp);
title = util_shellquote(tmp, 0);
xfree(tmp);
tmp = util_utf82char(mdata_get_songinfo(md));
songinfo = util_shellquote(tmp);
songinfo = util_shellquote(tmp, 0);
xfree(tmp);
filename_quoted = util_shellquote(filename);
filename_quoted = util_shellquote(filename, 0);
/*
* if (prog && format)
@ -150,7 +150,7 @@ _build_reencode_cmd(const char *extension, const char *filename,
mdata_strformat(md, buf, sizeof(buf),
cfg_get_metadata_format_str());
unquoted = util_utf82char(buf);
custom_songinfo = util_shellquote(unquoted);
custom_songinfo = util_shellquote(unquoted, 0);
xfree(unquoted);
} else {
if (!cfg_get_metadata_program() &&

31
src/util.c
View File

@ -295,19 +295,20 @@ util_expand_words(const char *in, struct util_dict dicts[])
return (out);
}
#define SHELLQUOTE_INLEN_MAX 8191UL
#define SHELLQUOTE_OUTLEN_MAX 8191UL
char *
util_shellquote(const char *in)
util_shellquote(const char *in, size_t outlen_max)
{
char *out, *out_p;
size_t out_len;
ssize_t out_len;
size_t out_siz;
const char *in_p;
out_len = (strlen(in) > SHELLQUOTE_INLEN_MAX)
? SHELLQUOTE_INLEN_MAX
: strlen(in);
out_len = out_len * 2 + 2;
if (!outlen_max || outlen_max > SHELLQUOTE_OUTLEN_MAX)
outlen_max = SHELLQUOTE_OUTLEN_MAX;
out_len = outlen_max;
out = xcalloc(out_len + 1, sizeof(char));
out_p = out;
@ -315,16 +316,24 @@ util_shellquote(const char *in)
*out_p++ = '\'';
out_len--;
while (*in_p && out_len > 2) {
while (*in_p && 1 < out_len) {
int stop = 0;
switch (*in_p) {
case '\'':
case '\\':
*out_p++ = '\\';
out_len--;
if (out_len > 4) {
*out_p++ = '\'';
*out_p++ = '\\';
*out_p++ = '\'';
out_len -= 3;
} else
stop = 1;
break;
default:
break;
}
if (stop)
break;
*out_p++ = *in_p++;
out_len--;
}

2
src/util.h
View File

@ -27,7 +27,7 @@ int util_strrcasecmp(const char *, const char *);
char * util_char2utf8(const char *);
char * util_utf82char(const char *);
char * util_expand_words(const char *, struct util_dict[]);
char * util_shellquote(const char *);
char * util_shellquote(const char *, size_t);
int util_urlparse(const char *, char **, unsigned short *, char **);
#endif /* __UTIL_H__ */