pr_scoreboard_entry_t *util_scoreboard_entry_read(void) {
static pr_scoreboard_entry_t scan_entry;
int res = 0;
if (util_scoreboard_fd < 0) {
errno = EINVAL;
return NULL;
}
/* Make sure the scoreboard file is read-locked. */
if (!util_scoreboard_read_locked)
rlock_scoreboard();
memset(&scan_entry, '\0', sizeof(scan_entry));
/* NOTE: use readv(2)? */
errno = 0;
while (scan_entry.sce_pid == 0) {
while ((res = read(util_scoreboard_fd, &scan_entry,
sizeof(scan_entry))) <= 0) {
if (res < 0 &&
errno == EINTR) {
continue;
} else {
unlock_scoreboard();
if (errno) {
fprintf(stdout, "error reading scoreboard entry: %s\n",
strerror(errno));
}
return NULL;
}
}
if (scan_entry.sce_pid) {
unlock_scoreboard();
return &scan_entry;
}
}
unlock_scoreboard();
return NULL;
}
pr_scoreboard_entry_t *pr_scoreboard_read_entry(void) {
static pr_scoreboard_entry_t scan_entry;
int res = 0;
if (scoreboard_fd < 0) {
errno = EINVAL;
return NULL;
}
/* Make sure the scoreboard file is read-locked. */
if (!scoreboard_read_locked) {
/* Do not proceed if we cannot lock the scoreboard. */
if (rlock_scoreboard() < 0)
return NULL;
}
memset(&scan_entry, '\0', sizeof(scan_entry));
/* NOTE: use readv(2)? */
while (TRUE) {
while ((res = read(scoreboard_fd, &scan_entry, sizeof(scan_entry))) <= 0) {
if (res < 0 && errno == EINTR) {
pr_signals_handle();
continue;
} else {
unlock_scoreboard();
return NULL;
}
}
if (scan_entry.sce_pid) {
unlock_scoreboard();
return &scan_entry;
} else
continue;
}
unlock_scoreboard();
return NULL;
}
