// PCA These calls to debug are rather sketchy because they may allocate memory. Fortunately they only occur if an error occurs.
int set_child_group(job_t *j, process_t *p, int print_errors)
{
int res = 0;
if (job_get_flag(j, JOB_CONTROL))
{
if (!j->pgid)
{
j->pgid = p->pid;
}
if (setpgid(p->pid, j->pgid))
{
if (getpgid(p->pid) != j->pgid && print_errors)
{
char pid_buff[128];
char job_id_buff[128];
char getpgid_buff[128];
char job_pgid_buff[128];
format_long_safe(pid_buff, p->pid);
format_long_safe(job_id_buff, j->job_id);
format_long_safe(getpgid_buff, getpgid(p->pid));
format_long_safe(job_pgid_buff, j->pgid);
debug_safe(1,
"Could not send process %s, '%s' in job %s, '%s' from group %s to group %s",
pid_buff,
p->argv0_cstr(),
job_id_buff,
j->command_cstr(),
getpgid_buff,
job_pgid_buff);
safe_perror("setpgid");
res = -1;
}
}
}
else
{
j->pgid = getpid();
}
if (job_get_flag(j, JOB_TERMINAL) && job_get_flag(j, JOB_FOREGROUND))
{
if (tcsetpgrp(0, j->pgid) && print_errors)
{
char job_id_buff[128];
format_long_safe(job_id_buff, j->job_id);
debug_safe(1, "Could not send job %s ('%s') to foreground", job_id_buff, j->command_cstr());
safe_perror("tcsetpgrp");
res = -1;
}
}
return res;
}
// In general, strerror is not async-safe, and therefore we cannot use it directly. So instead we
// have to grub through sys_nerr and sys_errlist directly On GNU toolchain, this will produce a
// deprecation warning from the linker (!!), which appears impossible to suppress!
const char *safe_strerror(int err) {
#if defined(__UCLIBC__)
// uClibc does not have sys_errlist, however, its strerror is believed to be async-safe.
// See issue #808.
return strerror(err);
#elif defined(HAVE__SYS__ERRS) || defined(HAVE_SYS_ERRLIST)
#ifdef HAVE_SYS_ERRLIST
if (err >= 0 && err < sys_nerr && sys_errlist[err] != NULL) {
return sys_errlist[err];
}
#elif defined(HAVE__SYS__ERRS)
extern const char _sys_errs[];
extern const int _sys_index[];
extern int _sys_num_err;
if (err >= 0 && err < _sys_num_err) {
return &_sys_errs[_sys_index[err]];
}
#endif // either HAVE__SYS__ERRS or HAVE_SYS_ERRLIST
#endif // defined(HAVE__SYS__ERRS) || defined(HAVE_SYS_ERRLIST)
int saved_err = errno;
static char buff[384]; // use a shared buffer for this case
char errnum_buff[64];
format_long_safe(errnum_buff, err);
buff[0] = '\0';
safe_append(buff, "unknown error (errno was ", sizeof buff);
safe_append(buff, errnum_buff, sizeof buff);
safe_append(buff, ")", sizeof buff);
errno = saved_err;
return buff;
}
static bool write_color(char *todo, unsigned char idx, bool is_fg) {
bool result = false;
if (idx < 16 || term256_support_is_native()) {
/* Use tparm */
putp( tparm( todo, idx ) );
result = true;
} else {
/* We are attempting to bypass the term here. Generate the ANSI escape sequence ourself. */
char stridx[128];
format_long_safe(stridx, (long)idx);
char buff[128] = "\x1b[";
strcat(buff, is_fg ? "38;5;" : "48;5;");
strcat(buff, stridx);
strcat(buff, "m");
write_loop(STDOUT_FILENO, buff, strlen(buff));
result = true;
}
return result;
}
const char *safe_strerror(int err)
{
if (err >= 0 && err < sys_nerr && sys_errlist[err] != NULL)
{
return sys_errlist[err];
}
else
{
int saved_err = errno;
/* Use a shared buffer for this case */
static char buff[384];
char errnum_buff[64];
format_long_safe(errnum_buff, err);
buff[0] = '\0';
safe_append(buff, "unknown error (errno was ", sizeof buff);
safe_append(buff, errnum_buff, sizeof buff);
safe_append(buff, ")", sizeof buff);
errno = saved_err;
return buff;
}
}
/* Cover for debug_safe that can take an int. The format string should expect a %s */
static void debug_safe_int(int level, const char *format, int val)
{
char buff[128];
format_long_safe(buff, val);
debug_safe(level, format, buff);
}