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Output embedded null characters more often

Browse source 
https://github.com/fish-shell/fish-shell/issues/444
This commit is contained in:
ridiculousfish 2012-12-12 15:44:01 -08:00
parent 82223d3bad
commit c5031c2b39
3 changed files with 66 additions and 30 deletions
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52
common.cpp
View file

@ -102,6 +102,7 @@ int debug_level=1;
*/
static struct winsize termsize;
static char *wcs2str_internal(const wchar_t *in, char *out);
void show_stackframe()
{
@ -292,15 +293,58 @@ char *wcs2str(const wchar_t *in)
return wcs2str_internal(in, out);
}
/* This function is distinguished from wcs2str_internal in that it allows embedded null bytes */
std::string wcs2string(const wcstring &input)
{
char *tmp = wcs2str(input.c_str());
std::string result = tmp;
free(tmp);
std::string result;
result.reserve(input.size());
mbstate_t state;
memset(&state, 0, sizeof(state));
size_t converted_max_len = (size_t)(1 + __mb_cur_max);
char *converted = new char[converted_max_len];
for (size_t i=0; i < input.size(); i++)
{
wchar_t wc = input[i];
if (wc == INTERNAL_SEPARATOR)
{
}
else if ((wc >= ENCODE_DIRECT_BASE) &&
(wc < ENCODE_DIRECT_BASE+256))
{
result.push_back(wc - ENCODE_DIRECT_BASE);
}
else
{
bzero(converted, converted_max_len);
size_t len = wcrtomb(converted, wc, &state);
if (len == (size_t)(-1))
{
debug(1, L"Wide character %d has no narrow representation", wc);
memset(&state, 0, sizeof(state));
}
else
{
result.append(converted, len);
}
}
}
delete [] converted;
return result;
}
char *wcs2str_internal(const wchar_t *in, char *out)
/**
Converts the wide character string \c in into it's narrow
equivalent, stored in \c out. \c out must have enough space to fit
the entire string.
This function decodes illegal character sequences in a reversible
way using the private use area.
*/
static char *wcs2str_internal(const wchar_t *in, char *out)
{
size_t res=0;
size_t in_pos=0;

10
common.h
View file

@ -273,16 +273,6 @@ void assert_is_background_thread(const char *who);
void assert_is_locked(void *mutex, const char *who, const char *caller);
#define ASSERT_IS_LOCKED(x) assert_is_locked((void *)(&x), #x, __FUNCTION__)
/**
Converts the wide character string \c in into it's narrow
equivalent, stored in \c out. \c out must have enough space to fit
the entire string.
This function decodes illegal character sequences in a reversible
way using the private use area.
*/
char *wcs2str_internal(const wchar_t *in, char *out);
/** Format the specified size (in bytes, kilobytes, etc.) into the specified stringbuffer. */
wcstring format_size(long long sz);

34
exec.cpp
View file

@ -498,13 +498,12 @@ static void internal_exec_helper(parser_t &parser,
}
/** Perform output from builtins. Called from a forked child, so don't do anything that may allocate memory, etc.. */
static void do_builtin_io(const char *out, const char *err)
static void do_builtin_io(const char *out, size_t outlen, const char *err, size_t errlen)
{
size_t len;
if (out && (len = strlen(out)))
if (out && outlen)
{
if (write_loop(STDOUT_FILENO, out, len) == -1)
if (write_loop(STDOUT_FILENO, out, outlen) == -1)
{
debug(0, L"Error while writing to stdout");
wperror(L"write_loop");
@ -512,9 +511,9 @@ static void do_builtin_io(const char *out, const char *err)
}
}
if (err && (len = strlen(err)))
if (err && errlen)
{
if (write_loop(STDERR_FILENO, err, len) == -1)
if (write_loop(STDERR_FILENO, err, errlen) == -1)
{
/*
Can't really show any error message here, since stderr is
@ -1189,10 +1188,9 @@ void exec(parser_t &parser, job_t *j)
printf("fork #-: Skipping fork for internal builtin for '%ls'\n", p->argv0());
}
const wcstring &out = get_stdout_buffer(), &err = get_stderr_buffer();
char *outbuff = wcs2str(out.c_str()), *errbuff = wcs2str(err.c_str());
do_builtin_io(outbuff, errbuff);
free(outbuff);
free(errbuff);
const std::string outbuff = wcs2string(out);
const std::string errbuff = wcs2string(err);
do_builtin_io(outbuff.data(), outbuff.size(), errbuff.data(), errbuff.size());
skip_fork = 1;
}
@ -1225,7 +1223,15 @@ void exec(parser_t &parser, job_t *j)
/* Get the strings we'll write before we fork (since they call malloc) */
const wcstring &out = get_stdout_buffer(), &err = get_stderr_buffer();
char *outbuff = wcs2str(out.c_str()), *errbuff = wcs2str(err.c_str());
/* These strings may contain embedded nulls, so don't treat them as C strings */
const std::string outbuff_str = wcs2string(out);
const char *outbuff = outbuff_str.data();
size_t outbuff_len = outbuff_str.size();
const std::string errbuff_str = wcs2string(err);
const char *errbuff = errbuff_str.data();
size_t errbuff_len = errbuff_str.size();
fflush(stdout);
fflush(stderr);
@ -1244,16 +1250,12 @@ void exec(parser_t &parser, job_t *j)
*/
p->pid = getpid();
setup_child_process(j, p);
do_builtin_io(outbuff, errbuff);
do_builtin_io(outbuff, outbuff_len, errbuff, errbuff_len);
exit_without_destructors(p->status);
}
else
{
/* Free the strings in the parent */
free(outbuff);
free(errbuff);
/*
This is the parent process. Store away
information on the child, and possibly give