bool process_iterator_t::next_process(wcstring *out_str, pid_t *out_pid)
{
wcstring cmd;
pid_t pid = 0;
while (cmd.empty())
{
wcstring name;
if (! dir || ! wreaddir(dir, name))
break;
if (!iswnumeric(name.c_str()))
continue;
wcstring path = wcstring(L"/proc/") + name;
struct stat buf;
if (wstat(path, &buf))
continue;
if (buf.st_uid != getuid())
continue;
/* remember the pid */
pid = fish_wcstoi(name.c_str(), NULL, 10);
/* the 'cmdline' file exists, it should contain the commandline */
FILE *cmdfile;
if ((cmdfile=wfopen(path + L"/cmdline", "r")))
{
wcstring full_command_line;
signal_block();
fgetws2(&full_command_line, cmdfile);
signal_unblock();
/* The command line needs to be escaped */
cmd = tok_first(full_command_line.c_str());
}
#ifdef SunOS
else if ((cmdfile=wfopen(path + L"/psinfo", "r")))
{
psinfo_t info;
if (fread(&info, sizeof(info), 1, cmdfile))
{
/* The filename is unescaped */
cmd = str2wcstring(info.pr_fname);
}
}
#endif
if (cmdfile)
fclose(cmdfile);
}
bool result = ! cmd.empty();
if (result)
{
*out_str = cmd;
*out_pid = pid;
}
return result;
}
/// Various things we need to initialize at run-time that don't really fit any of the other init
/// routines.
static void misc_init() {
#ifdef OS_IS_CYGWIN
// MS Windows tty devices do not currently have either a read or write timestamp. Those
// respective fields of `struct stat` are always the current time. Which means we can't
// use them. So we assume no external program has written to the terminal behind our
// back. This makes multiline promptusable. See issue #2859 and
// https://github.com/Microsoft/BashOnWindows/issues/545
has_working_tty_timestamps = false;
#else
// This covers preview builds of Windows Subsystem for Linux (WSL).
FILE *procsyskosrel;
if ((procsyskosrel = wfopen(L"/proc/sys/kernel/osrelease", "r"))) {
wcstring osrelease;
fgetws2(&osrelease, procsyskosrel);
if (osrelease.find(L"3.4.0-Microsoft") != wcstring::npos) {
has_working_tty_timestamps = false;
}
}
if (procsyskosrel) {
fclose(procsyskosrel);
}
#endif // OS_IS_MS_WINDOWS
}
