static ssize_t proc_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct proc_file_s *procfile;
FAR struct tcb_s *tcb;
irqstate_t flags;
ssize_t ret;
fvdbg("buffer=%p buflen=%d\n", buffer, (int)buflen);
/* Recover our private data from the struct file instance */
procfile = (FAR struct proc_file_s *)filep->f_priv;
DEBUGASSERT(procfile);
/* Verify that the thread is still valid */
flags = irqsave();
tcb = sched_gettcb(procfile->pid);
if (!tcb)
{
fdbg("ERROR: PID %d is not valid\n", (int)procfile->pid);
irqrestore(flags);
return -ENODEV;
}
/* Provide the requested data */
switch (procfile->node->node)
{
case PROC_STATUS: /* Task/thread status */
ret = proc_status(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_CMDLINE: /* Task command line */
ret = proc_cmdline(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#ifdef CONFIG_SCHED_CPULOAD
case PROC_LOADAVG: /* Average CPU utilization */
ret = proc_loadavg(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#endif
case PROC_STACK: /* Task stack info */
ret = proc_stack(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_GROUP_STATUS: /* Task group status */
ret = proc_groupstatus(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_GROUP_FD: /* Group file descriptors */
ret = proc_groupfd(procfile, tcb, buffer, buflen, filep->f_pos);
break;
default:
ret = -EINVAL;
break;
}
irqrestore(flags);
/* Update the file offset */
if (ret > 0)
{
filep->f_pos += ret;
}
return ret;
}
static ssize_t proc_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct proc_file_s *procfile;
FAR struct tcb_s *tcb;
irqstate_t flags;
ssize_t ret;
finfo("buffer=%p buflen=%d\n", buffer, (int)buflen);
/* Recover our private data from the struct file instance */
procfile = (FAR struct proc_file_s *)filep->f_priv;
DEBUGASSERT(procfile != NULL);
/* Verify that the thread is still valid */
flags = enter_critical_section();
tcb = sched_gettcb(procfile->pid);
if (tcb == NULL)
{
ferr("ERROR: PID %d is not valid\n", (int)procfile->pid);
leave_critical_section(flags);
return -ENODEV;
}
/* Provide the requested data */
switch (procfile->node->node)
{
case PROC_STATUS: /* Task/thread status */
ret = proc_status(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_CMDLINE: /* Task command line */
ret = proc_cmdline(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#ifdef CONFIG_SCHED_CPULOAD
case PROC_LOADAVG: /* Average CPU utilization */
ret = proc_loadavg(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#endif
case PROC_STACK: /* Task stack info */
ret = proc_stack(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_GROUP_STATUS: /* Task group status */
ret = proc_groupstatus(procfile, tcb, buffer, buflen, filep->f_pos);
break;
case PROC_GROUP_FD: /* Group file descriptors */
ret = proc_groupfd(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#if !defined(CONFIG_DISABLE_ENVIRON) && !defined(CONFIG_FS_PROCFS_EXCLUDE_ENVIRON)
case PROC_GROUP_ENV: /* Group environment variables */
ret = proc_groupenv(procfile, tcb, buffer, buflen, filep->f_pos);
break;
#endif
default:
ret = -EINVAL;
break;
}
leave_critical_section(flags);
/* Update the file offset */
if (ret > 0)
{
filep->f_pos += ret;
}
return ret;
}
