1614 lines
44 KiB
C
1614 lines
44 KiB
C
/****************************************************************************
|
|
* fs/procfs/fs_procfsproc.c
|
|
*
|
|
* Copyright (C) 2013-2017 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/statfs.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/irq.h>
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/sched.h>
|
|
#include <nuttx/kmalloc.h>
|
|
#include <nuttx/fs/fs.h>
|
|
#include <nuttx/fs/procfs.h>
|
|
#include <nuttx/fs/dirent.h>
|
|
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
# include <nuttx/clock.h>
|
|
#endif
|
|
|
|
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_PROCFS)
|
|
#ifndef CONFIG_FS_PROCFS_EXCLUDE_PROCESS
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
/* See include/nuttx/sched.h: */
|
|
|
|
#undef HAVE_GROUPID
|
|
|
|
#if defined(CONFIG_SCHED_HAVE_PARENT) && defined(CONFIG_SCHED_CHILD_STATUS)
|
|
# define HAVE_GROUPID 1
|
|
#endif
|
|
|
|
#ifdef CONFIG_DISABLE_PTHREAD
|
|
# undef HAVE_GROUPID
|
|
#endif
|
|
|
|
/* Determines the size of an intermediate buffer that must be large enough
|
|
* to handle the longest line generated by this logic.
|
|
*/
|
|
|
|
#define STATUS_LINELEN 32
|
|
|
|
/****************************************************************************
|
|
* Private Type Definitions
|
|
****************************************************************************/
|
|
/* This enumeration identifies all of the task/thread nodes that can be
|
|
* accessed via the procfs file system.
|
|
*/
|
|
|
|
enum proc_node_e
|
|
{
|
|
PROC_LEVEL0 = 0, /* The top-level directory */
|
|
PROC_STATUS, /* Task/thread status */
|
|
PROC_CMDLINE, /* Task command line */
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
PROC_LOADAVG, /* Average CPU utilization */
|
|
#endif
|
|
PROC_STACK, /* Task stack info */
|
|
PROC_GROUP, /* Group directory */
|
|
PROC_GROUP_STATUS, /* Task group status */
|
|
PROC_GROUP_FD /* Group file descriptors */
|
|
};
|
|
|
|
/* This structure associates a relative path name with an node in the task
|
|
* procfs
|
|
*/
|
|
|
|
struct proc_node_s
|
|
{
|
|
FAR const char *relpath; /* Relative path to the node */
|
|
FAR const char *name; /* Terminal node segment name */
|
|
uint8_t node; /* Type of node (see enum proc_node_e) */
|
|
uint8_t dtype; /* dirent type (see include/dirent.h) */
|
|
};
|
|
|
|
/* This structure describes one open "file" */
|
|
|
|
struct proc_file_s
|
|
{
|
|
struct procfs_file_s base; /* Base open file structure */
|
|
FAR const struct proc_node_s *node; /* Describes the file node */
|
|
pid_t pid; /* Task/thread ID */
|
|
char line[STATUS_LINELEN]; /* Pre-allocated buffer for formatted lines */
|
|
};
|
|
|
|
/* This structure describes one open "directory" */
|
|
|
|
struct proc_dir_s
|
|
{
|
|
struct procfs_dir_priv_s base; /* Base directory private data */
|
|
FAR const struct proc_node_s *node; /* Directory node description */
|
|
pid_t pid; /* ID of task/thread for attributes */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static FAR const char *g_policy[4] =
|
|
{
|
|
"SCHED_FIFO", "SCHED_RR", "SCHED_SPORADIC", "SCHED_OTHER"
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
/* Helpers */
|
|
|
|
static FAR const struct proc_node_s *
|
|
proc_findnode(FAR const char *relpath);
|
|
static ssize_t proc_status(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
static ssize_t proc_cmdline(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
static ssize_t proc_loadavg(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
#endif
|
|
static ssize_t proc_stack(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
static ssize_t proc_groupstatus(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
static ssize_t proc_groupfd(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer, size_t buflen,
|
|
off_t offset);
|
|
|
|
/* File system methods */
|
|
|
|
static int proc_open(FAR struct file *filep, FAR const char *relpath,
|
|
int oflags, mode_t mode);
|
|
static int proc_close(FAR struct file *filep);
|
|
static ssize_t proc_read(FAR struct file *filep, FAR char *buffer,
|
|
size_t buflen);
|
|
|
|
static int proc_dup(FAR const struct file *oldp,
|
|
FAR struct file *newp);
|
|
|
|
static int proc_opendir(const char *relpath, FAR struct fs_dirent_s *dir);
|
|
static int proc_closedir(FAR struct fs_dirent_s *dir);
|
|
static int proc_readdir(FAR struct fs_dirent_s *dir);
|
|
static int proc_rewinddir(FAR struct fs_dirent_s *dir);
|
|
|
|
static int proc_stat(FAR const char *relpath, FAR struct stat *buf);
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/* See fs_mount.c -- this structure is explicitly externed there.
|
|
* We use the old-fashioned kind of initializers so that this will compile
|
|
* with any compiler.
|
|
*/
|
|
|
|
const struct procfs_operations proc_operations =
|
|
{
|
|
proc_open, /* open */
|
|
proc_close, /* close */
|
|
proc_read, /* read */
|
|
NULL, /* write */
|
|
|
|
proc_dup, /* dup */
|
|
|
|
proc_opendir, /* opendir */
|
|
proc_closedir, /* closedir */
|
|
proc_readdir, /* readdir */
|
|
proc_rewinddir, /* rewinddir */
|
|
|
|
proc_stat /* stat */
|
|
};
|
|
|
|
/* These structures provide information about every node */
|
|
|
|
static const struct proc_node_s g_level0node =
|
|
{
|
|
"", "", (uint8_t)PROC_LEVEL0, DTYPE_DIRECTORY /* Top-level directory */
|
|
};
|
|
|
|
static const struct proc_node_s g_status =
|
|
{
|
|
"status", "status", (uint8_t)PROC_STATUS, DTYPE_FILE /* Task/thread status */
|
|
};
|
|
|
|
static const struct proc_node_s g_cmdline =
|
|
{
|
|
"cmdline", "cmdline", (uint8_t)PROC_CMDLINE, DTYPE_FILE /* Task command line */
|
|
};
|
|
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
static const struct proc_node_s g_loadavg =
|
|
{
|
|
"loadavg", "loadavg", (uint8_t)PROC_LOADAVG, DTYPE_FILE /* Average CPU utilization */
|
|
};
|
|
#endif
|
|
|
|
static const struct proc_node_s g_stack =
|
|
{
|
|
"stack", "stack", (uint8_t)PROC_STACK, DTYPE_FILE /* Task stack info */
|
|
};
|
|
|
|
static const struct proc_node_s g_group =
|
|
{
|
|
"group", "group", (uint8_t)PROC_GROUP, DTYPE_DIRECTORY /* Group directory */
|
|
};
|
|
|
|
static const struct proc_node_s g_groupstatus =
|
|
{
|
|
"group/status", "status", (uint8_t)PROC_GROUP_STATUS, DTYPE_FILE /* Task group status */
|
|
};
|
|
|
|
static const struct proc_node_s g_groupfd =
|
|
{
|
|
"group/fd", "fd", (uint8_t)PROC_GROUP_FD, DTYPE_FILE /* Group file descriptors */
|
|
};
|
|
|
|
/* This is the list of all nodes */
|
|
|
|
static FAR const struct proc_node_s * const g_nodeinfo[] =
|
|
{
|
|
&g_status, /* Task/thread status */
|
|
&g_cmdline, /* Task command line */
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
&g_loadavg, /* Average CPU utilization */
|
|
#endif
|
|
&g_stack, /* Task stack info */
|
|
&g_group, /* Group directory */
|
|
&g_groupstatus, /* Task group status */
|
|
&g_groupfd /* Group file descriptors */
|
|
};
|
|
#define PROC_NNODES (sizeof(g_nodeinfo)/sizeof(FAR const struct proc_node_s * const))
|
|
|
|
/* This is the list of all level0 nodes */
|
|
|
|
static const struct proc_node_s * const g_level0info[] =
|
|
{
|
|
&g_status, /* Task/thread status */
|
|
&g_cmdline, /* Task command line */
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
&g_loadavg, /* Average CPU utilization */
|
|
#endif
|
|
&g_stack, /* Task stack info */
|
|
&g_group, /* Group directory */
|
|
};
|
|
#define PROC_NLEVEL0NODES (sizeof(g_level0info)/sizeof(FAR const struct proc_node_s * const))
|
|
|
|
/* This is the list of all group sub-directory nodes */
|
|
|
|
static FAR const struct proc_node_s * const g_groupinfo[] =
|
|
{
|
|
&g_groupstatus, /* Task group status */
|
|
&g_groupfd /* Group file descriptors */
|
|
};
|
|
#define PROC_NGROUPNODES (sizeof(g_groupinfo)/sizeof(FAR const struct proc_node_s * const))
|
|
|
|
/* Names of task/thread states */
|
|
|
|
static FAR const char *g_statenames[] =
|
|
{
|
|
"Invalid",
|
|
"Waiting,Unlock",
|
|
"Ready",
|
|
#ifdef CONFIG_SMP
|
|
"Assigned",
|
|
#endif
|
|
"Running",
|
|
"Inactive",
|
|
"Waiting,Semaphore",
|
|
#ifndef CONFIG_DISABLE_SIGNALS
|
|
"Waiting,Signal",
|
|
#endif
|
|
#ifndef CONFIG_DISABLE_MQUEUE
|
|
"Waiting,MQ empty",
|
|
"Waiting,MQ full"
|
|
#endif
|
|
};
|
|
|
|
static FAR const char *g_ttypenames[4] =
|
|
{
|
|
"Task",
|
|
"pthread",
|
|
"Kthread",
|
|
"Invalid"
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: proc_findnode
|
|
****************************************************************************/
|
|
|
|
static FAR const struct proc_node_s *proc_findnode(FAR const char *relpath)
|
|
{
|
|
int i;
|
|
|
|
/* Search every string in g_nodeinfo or until a match is found */
|
|
|
|
for (i = 0; i < PROC_NNODES; i++)
|
|
{
|
|
if (strcmp(g_nodeinfo[i]->relpath, relpath) == 0)
|
|
{
|
|
return g_nodeinfo[i];
|
|
}
|
|
}
|
|
|
|
/* Not found */
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_status
|
|
*
|
|
* Description:
|
|
* Format:
|
|
*
|
|
* 111111111122222222223
|
|
* 123456789012345678901234567890
|
|
* Name: xxxx... Task/thread name (See CONFIG_TASK_NAME_SIZE)
|
|
* Type: xxxxxxx {Task, pthread, Kthread, Invalid}
|
|
* PPID: xxxxx Parent thread ID
|
|
* Group: xxxxx Group ID
|
|
* CPU: xxx CPU (CONFIG_SMP only)
|
|
* State: xxxxxxxx,xxxxxxxxx {Invalid, Waiting, Ready, Running, Inactive},
|
|
* {Unlock, Semaphore, Signal, MQ empty, MQ full}
|
|
* Flags: xxx N,P,X
|
|
* Priority: nnn Decimal, 0-255
|
|
* Scheduler: xxxxxxxxxxxxxx {SCHED_FIFO, SCHED_RR, SCHED_SPORADIC, SCHED_OTHER}
|
|
* Sigmask: nnnnnnnn Hexadecimal, 32-bit
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t proc_status(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
#ifdef CONFIG_SCHED_HAVE_PARENT
|
|
FAR struct task_group_s *group;
|
|
#endif
|
|
FAR const char *policy;
|
|
FAR const char *name;
|
|
size_t remaining;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
size_t totalsize;
|
|
|
|
remaining = buflen;
|
|
totalsize = 0;
|
|
|
|
/* Show the task name */
|
|
|
|
#if CONFIG_TASK_NAME_SIZE > 0
|
|
name = tcb->name;
|
|
#else
|
|
name = "<noname>";
|
|
#endif
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%s\n",
|
|
"Name:", name);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the thread type */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%s\n", "Type:",
|
|
g_ttypenames[(tcb->flags & TCB_FLAG_TTYPE_MASK) >>
|
|
TCB_FLAG_TTYPE_SHIFT]);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
#ifdef CONFIG_SCHED_HAVE_PARENT
|
|
group = tcb->group;
|
|
DEBUGASSERT(group);
|
|
|
|
#ifdef HAVE_GROUPID
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n", "Group:",
|
|
group->tg_pgid);
|
|
#else
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n", "PPID:",
|
|
group->tg_ppid);
|
|
#endif
|
|
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
if (tcb->task_state >= FIRST_ASSIGNED_STATE &&
|
|
tcb->task_state <= LAST_ASSIGNED_STATE)
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n", "CPU:",
|
|
tcb->cpu);
|
|
}
|
|
else
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s---\n", "CPU:");
|
|
}
|
|
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
#endif
|
|
|
|
/* Show the thread state */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%s\n", "State:",
|
|
g_statenames[tcb->task_state]);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show task flags */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%c%c%c\n", "Flags:",
|
|
tcb->flags & TCB_FLAG_NONCANCELABLE ? 'N' : '-',
|
|
tcb->flags & TCB_FLAG_CANCEL_PENDING ? 'P' : '-',
|
|
tcb->flags & TCB_FLAG_EXIT_PROCESSING ? 'P' : '-');
|
|
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the thread priority */
|
|
|
|
#ifdef CONFIG_PRIORITY_INHERITANCE
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d (%d)\n", "Priority:",
|
|
tcb->sched_priority, tcb->base_priority);
|
|
#else
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n", "Priority:",
|
|
tcb->sched_priority);
|
|
#endif
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the scheduler policy */
|
|
|
|
policy = g_policy[(tcb->flags & TCB_FLAG_POLICY_MASK) >> TCB_FLAG_POLICY_SHIFT];
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%s\n", "Scheduler:",
|
|
policy);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the signal mask */
|
|
|
|
#ifndef CONFIG_DISABLE_SIGNALS
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%08x\n", "SigMask:",
|
|
tcb->sigprocmask);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
#endif
|
|
|
|
return totalsize;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_cmdline
|
|
****************************************************************************/
|
|
|
|
static ssize_t proc_cmdline(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
FAR struct task_tcb_s *ttcb;
|
|
FAR const char *name;
|
|
FAR char **argv;
|
|
size_t remaining;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
size_t totalsize;
|
|
|
|
remaining = buflen;
|
|
totalsize = 0;
|
|
|
|
/* Show the task name */
|
|
|
|
#if CONFIG_TASK_NAME_SIZE > 0
|
|
name = tcb->name;
|
|
#else
|
|
name = "<noname>";
|
|
#endif
|
|
linesize = strlen(name);
|
|
memcpy(procfile->line, name, linesize);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
#ifndef CONFIG_DISABLE_PTHREAD
|
|
/* Show the pthread argument */
|
|
|
|
if ((tcb->flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD)
|
|
{
|
|
FAR struct pthread_tcb_s *ptcb = (FAR struct pthread_tcb_s *)tcb;
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, " 0x%p\n", ptcb->arg);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
return totalsize;
|
|
}
|
|
#endif
|
|
|
|
/* Show the task argument list (skipping over the name) */
|
|
|
|
ttcb = (FAR struct task_tcb_s *)tcb;
|
|
|
|
for (argv = ttcb->argv + 1; *argv; argv++)
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, " %s", *argv);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "\n");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
return totalsize;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_loadavg
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SCHED_CPULOAD
|
|
static ssize_t proc_loadavg(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
struct cpuload_s cpuload;
|
|
uint32_t intpart;
|
|
uint32_t fracpart;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
|
|
/* Sample the counts for the thread. clock_cpuload should only fail if
|
|
* the PID is not valid. This could happen if the thread exited sometime
|
|
* after the procfs entry was opened.
|
|
*/
|
|
|
|
(void)clock_cpuload(procfile->pid, &cpuload);
|
|
|
|
/* On the simulator, you may hit cpuload.total == 0, but probably never on
|
|
* real hardware.
|
|
*/
|
|
|
|
if (cpuload.total > 0)
|
|
{
|
|
uint32_t tmp;
|
|
|
|
tmp = (1000 * cpuload.active) / cpuload.total;
|
|
intpart = tmp / 10;
|
|
fracpart = tmp - 10 * intpart;
|
|
}
|
|
else
|
|
{
|
|
intpart = 0;
|
|
fracpart = 0;
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%3d.%01d%%",
|
|
intpart, fracpart);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset);
|
|
|
|
return copysize;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: proc_stack
|
|
****************************************************************************/
|
|
|
|
static ssize_t proc_stack(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
size_t remaining;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
size_t totalsize;
|
|
|
|
remaining = buflen;
|
|
totalsize = 0;
|
|
|
|
/* Show the stack base address */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s0x%p\n",
|
|
"StackBase:", tcb->adj_stack_ptr);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the stack size */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%ld\n",
|
|
"StackSize:", (long)tcb->adj_stack_size);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
#ifdef CONFIG_STACK_COLORATION
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Show the stack size */
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%ld\n",
|
|
"StackUsed:", (long)up_check_tcbstack(tcb));
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
#endif
|
|
|
|
return totalsize;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_groupstatus
|
|
****************************************************************************/
|
|
|
|
static ssize_t proc_groupstatus(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
FAR struct task_group_s *group = tcb->group;
|
|
size_t remaining;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
size_t totalsize;
|
|
#ifdef HAVE_GROUP_MEMBERS
|
|
int i;
|
|
#endif
|
|
|
|
DEBUGASSERT(group);
|
|
|
|
remaining = buflen;
|
|
totalsize = 0;
|
|
|
|
/* Show the group IDs */
|
|
|
|
#ifdef HAVE_GROUP_MEMBERS
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n",
|
|
"Group ID:", group->tg_gid);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n",
|
|
"Parent ID:", group->tg_pgid);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_SCHED_HAVE_PARENT)
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n",
|
|
"Main task:", group->tg_task);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
#endif
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s0x%02x\n",
|
|
"Flags:", group->tg_flags);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%-12s%d\n",
|
|
"Members:", group->tg_nmembers);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
#ifdef HAVE_GROUP_MEMBERS
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "Member IDs:");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
for (i = 0; i < group->tg_nmembers; i++)
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, " %d");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
}
|
|
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "\n");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
#endif
|
|
|
|
return totalsize;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_groupfd
|
|
****************************************************************************/
|
|
|
|
static ssize_t proc_groupfd(FAR struct proc_file_s *procfile,
|
|
FAR struct tcb_s *tcb, FAR char *buffer,
|
|
size_t buflen, off_t offset)
|
|
{
|
|
FAR struct task_group_s *group = tcb->group;
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0 /* Guaranteed to be true */
|
|
FAR struct file *file;
|
|
#endif
|
|
#if CONFIG_NSOCKET_DESCRIPTORS > 0
|
|
FAR struct socket *socket;
|
|
#endif
|
|
size_t remaining;
|
|
size_t linesize;
|
|
size_t copysize;
|
|
size_t totalsize;
|
|
int i;
|
|
|
|
DEBUGASSERT(group);
|
|
|
|
remaining = buflen;
|
|
totalsize = 0;
|
|
|
|
#if CONFIG_NFILE_DESCRIPTORS > 0 /* Guaranteed to be true */
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "\n%-3s %-8s %s\n",
|
|
"FD", "POS", "OFLAGS");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Examine each open file descriptor */
|
|
|
|
for (i = 0, file = group->tg_filelist.fl_files; i < CONFIG_NFILE_DESCRIPTORS; i++, file++)
|
|
{
|
|
/* Is there an inode associated with the file descriptor? */
|
|
|
|
if (file->f_inode)
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%3d %8ld %04x\n",
|
|
i, (long)file->f_pos, file->f_oflags);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_NSOCKET_DESCRIPTORS > 0
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "\n%-3s %-2s %-3s %s\n",
|
|
"SD", "RF", "TYP", "FLAGS");
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
|
|
/* Examine each open socket descriptor */
|
|
|
|
for (i = 0, socket = group->tg_socketlist.sl_sockets; i < CONFIG_NSOCKET_DESCRIPTORS; i++, socket++)
|
|
{
|
|
/* Is there an connection associated with the socket descriptor? */
|
|
|
|
if (socket->s_conn)
|
|
{
|
|
linesize = snprintf(procfile->line, STATUS_LINELEN, "%3d %2d %3d %02x",
|
|
i + CONFIG_NFILE_DESCRIPTORS,
|
|
socket->s_crefs, socket->s_type, socket->s_flags);
|
|
copysize = procfs_memcpy(procfile->line, linesize, buffer, remaining, &offset);
|
|
|
|
totalsize += copysize;
|
|
buffer += copysize;
|
|
remaining -= copysize;
|
|
|
|
if (totalsize >= buflen)
|
|
{
|
|
return totalsize;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return totalsize;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_open
|
|
****************************************************************************/
|
|
|
|
static int proc_open(FAR struct file *filep, FAR const char *relpath,
|
|
int oflags, mode_t mode)
|
|
{
|
|
FAR struct proc_file_s *procfile;
|
|
FAR const struct proc_node_s *node;
|
|
FAR struct tcb_s *tcb;
|
|
FAR char *ptr;
|
|
irqstate_t flags;
|
|
unsigned long tmp;
|
|
pid_t pid;
|
|
|
|
finfo("Open '%s'\n", relpath);
|
|
|
|
/* PROCFS is read-only. Any attempt to open with any kind of write
|
|
* access is not permitted.
|
|
*
|
|
* REVISIT: Write-able proc files could be quite useful.
|
|
*/
|
|
|
|
if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
|
|
{
|
|
ferr("ERROR: Only O_RDONLY supported\n");
|
|
return -EACCES;
|
|
}
|
|
|
|
/* The first segment of the relative path should be a task/thread ID */
|
|
|
|
ptr = NULL;
|
|
tmp = strtoul(relpath, &ptr, 10);
|
|
|
|
if (!ptr || *ptr != '/')
|
|
{
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Skip over the slash */
|
|
|
|
ptr++;
|
|
|
|
/* A valid PID would be in the range of 0-32767 (0 is reserved for the
|
|
* IDLE thread).
|
|
*/
|
|
|
|
if (tmp >= 32768)
|
|
{
|
|
ferr("ERROR: Invalid PID %ld\n", tmp);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Now verify that a task with this task/thread ID exists */
|
|
|
|
pid = (pid_t)tmp;
|
|
|
|
flags = enter_critical_section();
|
|
tcb = sched_gettcb(pid);
|
|
leave_critical_section(flags);
|
|
|
|
if (!tcb)
|
|
{
|
|
ferr("ERROR: PID %d is no longer valid\n", (int)pid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* The remaining segments of the relpath should be a well known node in
|
|
* the task/thread tree.
|
|
*/
|
|
|
|
node = proc_findnode(ptr);
|
|
if (!node)
|
|
{
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* The node must be a file, not a directory */
|
|
|
|
if (!DIRENT_ISFILE(node->dtype))
|
|
{
|
|
ferr("ERROR: Path \"%s\" is not a regular file\n", relpath);
|
|
return -EISDIR;
|
|
}
|
|
|
|
/* Allocate a container to hold the task and node selection */
|
|
|
|
procfile = (FAR struct proc_file_s *)kmm_zalloc(sizeof(struct proc_file_s));
|
|
if (!procfile)
|
|
{
|
|
ferr("ERROR: Failed to allocate file container\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Initialize the file container */
|
|
|
|
procfile->pid = pid;
|
|
procfile->node = node;
|
|
|
|
/* Save the index as the open-specific state in filep->f_priv */
|
|
|
|
filep->f_priv = (FAR void *)procfile;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_close
|
|
****************************************************************************/
|
|
|
|
static int proc_close(FAR struct file *filep)
|
|
{
|
|
FAR struct proc_file_s *procfile;
|
|
|
|
/* Recover our private data from the struct file instance */
|
|
|
|
procfile = (FAR struct proc_file_s *)filep->f_priv;
|
|
DEBUGASSERT(procfile);
|
|
|
|
/* Release the file container structure */
|
|
|
|
kmm_free(procfile);
|
|
filep->f_priv = NULL;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_read
|
|
****************************************************************************/
|
|
|
|
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);
|
|
|
|
/* Verify that the thread is still valid */
|
|
|
|
flags = enter_critical_section();
|
|
tcb = sched_gettcb(procfile->pid);
|
|
|
|
if (!tcb)
|
|
{
|
|
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;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
leave_critical_section(flags);
|
|
|
|
/* Update the file offset */
|
|
|
|
if (ret > 0)
|
|
{
|
|
filep->f_pos += ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_dup
|
|
*
|
|
* Description:
|
|
* Duplicate open file data in the new file structure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_dup(FAR const struct file *oldp, FAR struct file *newp)
|
|
{
|
|
FAR struct proc_file_s *oldfile;
|
|
FAR struct proc_file_s *newfile;
|
|
|
|
finfo("Dup %p->%p\n", oldp, newp);
|
|
|
|
/* Recover our private data from the old struct file instance */
|
|
|
|
oldfile = (FAR struct proc_file_s *)oldp->f_priv;
|
|
DEBUGASSERT(oldfile);
|
|
|
|
/* Allocate a new container to hold the task and node selection */
|
|
|
|
newfile = (FAR struct proc_file_s *)kmm_malloc(sizeof(struct proc_file_s));
|
|
if (!newfile)
|
|
{
|
|
ferr("ERROR: Failed to allocate file container\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* The copy the file information from the old container to the new */
|
|
|
|
memcpy(newfile, oldfile, sizeof(struct proc_file_s));
|
|
|
|
/* Save the new container in the new file structure */
|
|
|
|
newp->f_priv = (FAR void *)newfile;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_opendir
|
|
*
|
|
* Description:
|
|
* Open a directory for read access
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_opendir(FAR const char *relpath, FAR struct fs_dirent_s *dir)
|
|
{
|
|
FAR struct proc_dir_s *procdir;
|
|
FAR const struct proc_node_s *node;
|
|
FAR struct tcb_s *tcb;
|
|
irqstate_t flags;
|
|
unsigned long tmp;
|
|
FAR char *ptr;
|
|
pid_t pid;
|
|
|
|
finfo("relpath: \"%s\"\n", relpath ? relpath : "NULL");
|
|
DEBUGASSERT(relpath && dir && !dir->u.procfs);
|
|
|
|
/* The relative must be either:
|
|
*
|
|
* (1) "<pid>" - The sub-directory of task/thread attributes, or
|
|
* (2) The name of a directory node under <pid>
|
|
*/
|
|
|
|
/* Otherwise, the relative path should be a valid task/thread ID */
|
|
|
|
ptr = NULL;
|
|
tmp = strtoul(relpath, &ptr, 10);
|
|
|
|
if (!ptr || (*ptr != '\0' && *ptr != '/'))
|
|
{
|
|
/* strtoul failed or there is something in the path after the pid */
|
|
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* A valid PID would be in the range of 0-32767 (0 is reserved for the
|
|
* IDLE thread).
|
|
*/
|
|
|
|
if (tmp >= 32768)
|
|
{
|
|
ferr("ERROR: Invalid PID %ld\n", tmp);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Now verify that a task with this task/thread ID exists */
|
|
|
|
pid = (pid_t)tmp;
|
|
|
|
flags = enter_critical_section();
|
|
tcb = sched_gettcb(pid);
|
|
leave_critical_section(flags);
|
|
|
|
if (!tcb)
|
|
{
|
|
ferr("ERROR: PID %d is not valid\n", (int)pid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Allocate the directory structure. Note that the index and procentry
|
|
* pointer are implicitly nullified by kmm_zalloc(). Only the remaining,
|
|
* non-zero entries will need be initialized.
|
|
*/
|
|
|
|
procdir = (FAR struct proc_dir_s *)kmm_zalloc(sizeof(struct proc_dir_s));
|
|
if (!procdir)
|
|
{
|
|
ferr("ERROR: Failed to allocate the directory structure\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Was the <pid> the final element of the path? */
|
|
|
|
if (*ptr != '\0' && strcmp(ptr, "/") != 0)
|
|
{
|
|
/* There is something in the path after the pid. Skip over the path
|
|
* segment delimiter and see if we can identify the node of interest.
|
|
*/
|
|
|
|
ptr++;
|
|
node = proc_findnode(ptr);
|
|
if (!node)
|
|
{
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
kmm_free(procdir);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* The node must be a directory, not a file */
|
|
|
|
if (!DIRENT_ISDIRECTORY(node->dtype))
|
|
{
|
|
ferr("ERROR: Path \"%s\" is not a directory\n", relpath);
|
|
kmm_free(procdir);
|
|
return -ENOTDIR;
|
|
}
|
|
|
|
/* This is a second level directory */
|
|
|
|
procdir->base.level = 2;
|
|
procdir->base.nentries = PROC_NGROUPNODES;
|
|
procdir->node = node;
|
|
}
|
|
else
|
|
{
|
|
/* Use the special level0 node */
|
|
|
|
procdir->base.level = 1;
|
|
procdir->base.nentries = PROC_NLEVEL0NODES;
|
|
procdir->node = &g_level0node;
|
|
}
|
|
|
|
procdir->pid = pid;
|
|
dir->u.procfs = (FAR void *)procdir;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_closedir
|
|
*
|
|
* Description: Close the directory listing
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_closedir(FAR struct fs_dirent_s *dir)
|
|
{
|
|
FAR struct proc_dir_s *priv;
|
|
|
|
DEBUGASSERT(dir && dir->u.procfs);
|
|
priv = dir->u.procfs;
|
|
|
|
if (priv)
|
|
{
|
|
kmm_free(priv);
|
|
}
|
|
|
|
dir->u.procfs = NULL;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_readdir
|
|
*
|
|
* Description: Read the next directory entry
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_readdir(struct fs_dirent_s *dir)
|
|
{
|
|
FAR struct proc_dir_s *procdir;
|
|
FAR const struct proc_node_s *node = NULL;
|
|
FAR struct tcb_s *tcb;
|
|
unsigned int index;
|
|
irqstate_t flags;
|
|
pid_t pid;
|
|
int ret;
|
|
|
|
DEBUGASSERT(dir && dir->u.procfs);
|
|
procdir = dir->u.procfs;
|
|
|
|
/* Have we reached the end of the directory */
|
|
|
|
index = procdir->base.index;
|
|
if (index >= procdir->base.nentries)
|
|
{
|
|
/* We signal the end of the directory by returning the special
|
|
* error -ENOENT
|
|
*/
|
|
|
|
finfo("Entry %d: End of directory\n", index);
|
|
ret = -ENOENT;
|
|
}
|
|
|
|
/* No, we are not at the end of the directory */
|
|
|
|
else
|
|
{
|
|
/* Verify that the pid still refers to an active task/thread */
|
|
|
|
pid = procdir->pid;
|
|
|
|
flags = enter_critical_section();
|
|
tcb = sched_gettcb(pid);
|
|
leave_critical_section(flags);
|
|
|
|
if (!tcb)
|
|
{
|
|
ferr("ERROR: PID %d is no longer valid\n", (int)pid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* The TCB is still valid (or at least was when we entered this function) */
|
|
/* Handle the directory listing by the node type */
|
|
|
|
switch (procdir->node->node)
|
|
{
|
|
case PROC_LEVEL0: /* Top level directory */
|
|
DEBUGASSERT(procdir->base.level == 1);
|
|
node = g_level0info[index];
|
|
break;
|
|
|
|
case PROC_GROUP: /* Group sub-directory */
|
|
DEBUGASSERT(procdir->base.level == 2);
|
|
node = g_groupinfo[index];
|
|
break;
|
|
|
|
default:
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Save the filename and file type */
|
|
|
|
dir->fd_dir.d_type = node->dtype;
|
|
strncpy(dir->fd_dir.d_name, node->name, NAME_MAX+1);
|
|
|
|
/* Set up the next directory entry offset. NOTE that we could use the
|
|
* standard f_pos instead of our own private index.
|
|
*/
|
|
|
|
procdir->base.index = index + 1;
|
|
ret = OK;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_rewindir
|
|
*
|
|
* Description: Reset directory read to the first entry
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_rewinddir(struct fs_dirent_s *dir)
|
|
{
|
|
FAR struct proc_dir_s *priv;
|
|
|
|
DEBUGASSERT(dir && dir->u.procfs);
|
|
priv = dir->u.procfs;
|
|
|
|
priv->base.index = 0;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: proc_stat
|
|
*
|
|
* Description: Return information about a file or directory
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int proc_stat(const char *relpath, struct stat *buf)
|
|
{
|
|
FAR const struct proc_node_s *node;
|
|
FAR struct tcb_s *tcb;
|
|
unsigned long tmp;
|
|
FAR char *ptr;
|
|
irqstate_t flags;
|
|
pid_t pid;
|
|
|
|
/* Two path forms are accepted:
|
|
*
|
|
* "<pid>" - If <pid> refers to a currently active task/thread, then it
|
|
* is a directory
|
|
* "<pid>/<node>" - If <node> is a recognized node then, then it
|
|
* is a file or directory.
|
|
*/
|
|
|
|
ptr = NULL;
|
|
tmp = strtoul(relpath, &ptr, 10);
|
|
|
|
if (!ptr)
|
|
{
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* A valid PID would be in the range of 0-32767 (0 is reserved for the
|
|
* IDLE thread).
|
|
*/
|
|
|
|
if (tmp >= 32768)
|
|
{
|
|
ferr("ERROR: Invalid PID %ld\n", tmp);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Now verify that a task with this task/thread ID exists */
|
|
|
|
pid = (pid_t)tmp;
|
|
|
|
flags = enter_critical_section();
|
|
tcb = sched_gettcb(pid);
|
|
leave_critical_section(flags);
|
|
|
|
if (!tcb)
|
|
{
|
|
ferr("ERROR: PID %d is no longer valid\n", (int)pid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* Was the <pid> the final element of the path? */
|
|
|
|
memset(buf, 0, sizeof(struct stat));
|
|
if (*ptr == '\0' || strcmp(ptr, "/") == 0)
|
|
{
|
|
/* Yes ... It's a read-only directory */
|
|
|
|
buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR;
|
|
}
|
|
|
|
/* Verify that the process ID is followed by valid path segment delimiter */
|
|
|
|
else if (*ptr != '/')
|
|
{
|
|
/* We are required to return -ENOENT all all invalid paths */
|
|
|
|
ferr("ERROR: Bad delimiter '%c' in relpath '%s'\n", *ptr, relpath);
|
|
return -ENOENT;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, the second segment of the relpath should be a well
|
|
* known node of the task/thread directory structure.
|
|
*/
|
|
|
|
/* Skip over the path segment delimiter */
|
|
|
|
ptr++;
|
|
|
|
/* Lookup the well-known node associated with the relative path. */
|
|
|
|
node = proc_findnode(ptr);
|
|
if (!node)
|
|
{
|
|
ferr("ERROR: Invalid path \"%s\"\n", relpath);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* If the node exists, it is the name for a read-only file or
|
|
* directory.
|
|
*/
|
|
|
|
if (node->dtype == DTYPE_FILE)
|
|
{
|
|
buf->st_mode = S_IFREG | S_IROTH | S_IRGRP | S_IRUSR;
|
|
}
|
|
else
|
|
{
|
|
buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR;
|
|
}
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#endif /* CONFIG_FS_PROC_EXCLUDE_PROCESS */
|
|
#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_PROCFS */
|