Why can't tree fully list /sys/class/hwmon? And how could I do that?











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3
down vote

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If I understand correctly, in Linux, everything is a path, right down to each piece of hardware. I am trying to get information about how my sensors are structured, so I thought I would just use tree to map out all the things in my hwmon directory. However, tree does not behave the same with this directory as I am accustomed to.



When I run tree on a normal directory, I get the subdirectory structure without using the -R or -L flags:



$ tree /home
/home
└── boss
├── clones
├── Desktop
├── Documents
│   ├── modules.txt
│   ├── old_docs
│   │   └── assorted
│   └── prepscript.txt
├── Downloads
├── Music
├── Pictures
├── Public
├── Templates
└── Videos

12 directories, 2 files


but I try to do the same with HWmon, it only goes one level deep, even if I do use the -R flag and even though there is stuff deeper:



$ tree /sys/class/hwmon/
/sys/class/hwmon/
├── hwmon0 -> ../../devices/pci0000:40/0000:40:01.3/0000:43:00.0/hwmon/hwmon0
├── hwmon1 -> ../../devices/pci0000:00/0000:00:01.3/0000:09:00.0/hwmon/hwmon1
├── hwmon2 -> ../../devices/pci0000:40/0000:40:03.1/0000:44:00.0/hwmon/hwmon2
├── hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
├── hwmon4 -> ../../devices/pci0000:00/0000:00:19.3/hwmon/hwmon4
├── hwmon5 -> ../../devices/virtual/thermal/thermal_zone0/hwmon5
└── hwmon6 -> ../../devices/platform/nct6775.656/hwmon/hwmon6

7 directories, 0 files
$ tree /sys/class/hwmon/hwmon0
/sys/class/hwmon/hwmon0
├── device -> ../../../0000:43:00.0
├── fan1_input
├── name
├── power
│   ├── async
│   ├── autosuspend_delay_ms
│   ├── control
│   ├── runtime_active_kids
│   ├── runtime_active_time
│   ├── runtime_enabled
│   ├── runtime_status
│   ├── runtime_suspended_time
│   └── runtime_usage
├── pwm1
├── pwm1_enable
├── pwm1_max
├── pwm1_min
├── subsystem -> ../../../../../../class/hwmon
├── temp1_auto_point1_pwm
├── temp1_auto_point1_temp
├── temp1_auto_point1_temp_hyst
├── temp1_crit
├── temp1_crit_hyst
├── temp1_emergency
├── temp1_emergency_hyst
├── temp1_input
├── temp1_max
├── temp1_max_hyst
├── uevent
└── update_interval

3 directories, 27 files


What causes this difference in behavior, and can I just get a simple tree of all the devices?










share|improve this question




























    up vote
    3
    down vote

    favorite












    If I understand correctly, in Linux, everything is a path, right down to each piece of hardware. I am trying to get information about how my sensors are structured, so I thought I would just use tree to map out all the things in my hwmon directory. However, tree does not behave the same with this directory as I am accustomed to.



    When I run tree on a normal directory, I get the subdirectory structure without using the -R or -L flags:



    $ tree /home
    /home
    └── boss
    ├── clones
    ├── Desktop
    ├── Documents
    │   ├── modules.txt
    │   ├── old_docs
    │   │   └── assorted
    │   └── prepscript.txt
    ├── Downloads
    ├── Music
    ├── Pictures
    ├── Public
    ├── Templates
    └── Videos

    12 directories, 2 files


    but I try to do the same with HWmon, it only goes one level deep, even if I do use the -R flag and even though there is stuff deeper:



    $ tree /sys/class/hwmon/
    /sys/class/hwmon/
    ├── hwmon0 -> ../../devices/pci0000:40/0000:40:01.3/0000:43:00.0/hwmon/hwmon0
    ├── hwmon1 -> ../../devices/pci0000:00/0000:00:01.3/0000:09:00.0/hwmon/hwmon1
    ├── hwmon2 -> ../../devices/pci0000:40/0000:40:03.1/0000:44:00.0/hwmon/hwmon2
    ├── hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
    ├── hwmon4 -> ../../devices/pci0000:00/0000:00:19.3/hwmon/hwmon4
    ├── hwmon5 -> ../../devices/virtual/thermal/thermal_zone0/hwmon5
    └── hwmon6 -> ../../devices/platform/nct6775.656/hwmon/hwmon6

    7 directories, 0 files
    $ tree /sys/class/hwmon/hwmon0
    /sys/class/hwmon/hwmon0
    ├── device -> ../../../0000:43:00.0
    ├── fan1_input
    ├── name
    ├── power
    │   ├── async
    │   ├── autosuspend_delay_ms
    │   ├── control
    │   ├── runtime_active_kids
    │   ├── runtime_active_time
    │   ├── runtime_enabled
    │   ├── runtime_status
    │   ├── runtime_suspended_time
    │   └── runtime_usage
    ├── pwm1
    ├── pwm1_enable
    ├── pwm1_max
    ├── pwm1_min
    ├── subsystem -> ../../../../../../class/hwmon
    ├── temp1_auto_point1_pwm
    ├── temp1_auto_point1_temp
    ├── temp1_auto_point1_temp_hyst
    ├── temp1_crit
    ├── temp1_crit_hyst
    ├── temp1_emergency
    ├── temp1_emergency_hyst
    ├── temp1_input
    ├── temp1_max
    ├── temp1_max_hyst
    ├── uevent
    └── update_interval

    3 directories, 27 files


    What causes this difference in behavior, and can I just get a simple tree of all the devices?










    share|improve this question


























      up vote
      3
      down vote

      favorite









      up vote
      3
      down vote

      favorite











      If I understand correctly, in Linux, everything is a path, right down to each piece of hardware. I am trying to get information about how my sensors are structured, so I thought I would just use tree to map out all the things in my hwmon directory. However, tree does not behave the same with this directory as I am accustomed to.



      When I run tree on a normal directory, I get the subdirectory structure without using the -R or -L flags:



      $ tree /home
      /home
      └── boss
      ├── clones
      ├── Desktop
      ├── Documents
      │   ├── modules.txt
      │   ├── old_docs
      │   │   └── assorted
      │   └── prepscript.txt
      ├── Downloads
      ├── Music
      ├── Pictures
      ├── Public
      ├── Templates
      └── Videos

      12 directories, 2 files


      but I try to do the same with HWmon, it only goes one level deep, even if I do use the -R flag and even though there is stuff deeper:



      $ tree /sys/class/hwmon/
      /sys/class/hwmon/
      ├── hwmon0 -> ../../devices/pci0000:40/0000:40:01.3/0000:43:00.0/hwmon/hwmon0
      ├── hwmon1 -> ../../devices/pci0000:00/0000:00:01.3/0000:09:00.0/hwmon/hwmon1
      ├── hwmon2 -> ../../devices/pci0000:40/0000:40:03.1/0000:44:00.0/hwmon/hwmon2
      ├── hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
      ├── hwmon4 -> ../../devices/pci0000:00/0000:00:19.3/hwmon/hwmon4
      ├── hwmon5 -> ../../devices/virtual/thermal/thermal_zone0/hwmon5
      └── hwmon6 -> ../../devices/platform/nct6775.656/hwmon/hwmon6

      7 directories, 0 files
      $ tree /sys/class/hwmon/hwmon0
      /sys/class/hwmon/hwmon0
      ├── device -> ../../../0000:43:00.0
      ├── fan1_input
      ├── name
      ├── power
      │   ├── async
      │   ├── autosuspend_delay_ms
      │   ├── control
      │   ├── runtime_active_kids
      │   ├── runtime_active_time
      │   ├── runtime_enabled
      │   ├── runtime_status
      │   ├── runtime_suspended_time
      │   └── runtime_usage
      ├── pwm1
      ├── pwm1_enable
      ├── pwm1_max
      ├── pwm1_min
      ├── subsystem -> ../../../../../../class/hwmon
      ├── temp1_auto_point1_pwm
      ├── temp1_auto_point1_temp
      ├── temp1_auto_point1_temp_hyst
      ├── temp1_crit
      ├── temp1_crit_hyst
      ├── temp1_emergency
      ├── temp1_emergency_hyst
      ├── temp1_input
      ├── temp1_max
      ├── temp1_max_hyst
      ├── uevent
      └── update_interval

      3 directories, 27 files


      What causes this difference in behavior, and can I just get a simple tree of all the devices?










      share|improve this question















      If I understand correctly, in Linux, everything is a path, right down to each piece of hardware. I am trying to get information about how my sensors are structured, so I thought I would just use tree to map out all the things in my hwmon directory. However, tree does not behave the same with this directory as I am accustomed to.



      When I run tree on a normal directory, I get the subdirectory structure without using the -R or -L flags:



      $ tree /home
      /home
      └── boss
      ├── clones
      ├── Desktop
      ├── Documents
      │   ├── modules.txt
      │   ├── old_docs
      │   │   └── assorted
      │   └── prepscript.txt
      ├── Downloads
      ├── Music
      ├── Pictures
      ├── Public
      ├── Templates
      └── Videos

      12 directories, 2 files


      but I try to do the same with HWmon, it only goes one level deep, even if I do use the -R flag and even though there is stuff deeper:



      $ tree /sys/class/hwmon/
      /sys/class/hwmon/
      ├── hwmon0 -> ../../devices/pci0000:40/0000:40:01.3/0000:43:00.0/hwmon/hwmon0
      ├── hwmon1 -> ../../devices/pci0000:00/0000:00:01.3/0000:09:00.0/hwmon/hwmon1
      ├── hwmon2 -> ../../devices/pci0000:40/0000:40:03.1/0000:44:00.0/hwmon/hwmon2
      ├── hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
      ├── hwmon4 -> ../../devices/pci0000:00/0000:00:19.3/hwmon/hwmon4
      ├── hwmon5 -> ../../devices/virtual/thermal/thermal_zone0/hwmon5
      └── hwmon6 -> ../../devices/platform/nct6775.656/hwmon/hwmon6

      7 directories, 0 files
      $ tree /sys/class/hwmon/hwmon0
      /sys/class/hwmon/hwmon0
      ├── device -> ../../../0000:43:00.0
      ├── fan1_input
      ├── name
      ├── power
      │   ├── async
      │   ├── autosuspend_delay_ms
      │   ├── control
      │   ├── runtime_active_kids
      │   ├── runtime_active_time
      │   ├── runtime_enabled
      │   ├── runtime_status
      │   ├── runtime_suspended_time
      │   └── runtime_usage
      ├── pwm1
      ├── pwm1_enable
      ├── pwm1_max
      ├── pwm1_min
      ├── subsystem -> ../../../../../../class/hwmon
      ├── temp1_auto_point1_pwm
      ├── temp1_auto_point1_temp
      ├── temp1_auto_point1_temp_hyst
      ├── temp1_crit
      ├── temp1_crit_hyst
      ├── temp1_emergency
      ├── temp1_emergency_hyst
      ├── temp1_input
      ├── temp1_max
      ├── temp1_max_hyst
      ├── uevent
      └── update_interval

      3 directories, 27 files


      What causes this difference in behavior, and can I just get a simple tree of all the devices?







      sysfs tree sensors






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Dec 2 at 21:55









      Rui F Ribeiro

      38.5k1479128




      38.5k1479128










      asked Dec 2 at 20:10









      Thoughtcraft

      1569




      1569






















          1 Answer
          1






          active

          oldest

          votes

















          up vote
          8
          down vote



          accepted










          tree behaves that way because it doesn’t dereference symlinks by default. The -l option will change that:



          tree -l /sys/class/hwmon/


          but you’ll have fun making sense of all the output.






          share|improve this answer





















          • Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
            – Thoughtcraft
            Dec 2 at 20:22






          • 2




            @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
            – sourcejedi
            Dec 2 at 21:06












          • Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
            – Thoughtcraft
            Dec 2 at 21:14










          • Might want to check for infinite loops.
            – Joshua
            Dec 3 at 0:48






          • 1




            @Joshua tree -l does that on its own.
            – Stephen Kitt
            Dec 3 at 5:13











          Your Answer








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          1 Answer
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          active

          oldest

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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          8
          down vote



          accepted










          tree behaves that way because it doesn’t dereference symlinks by default. The -l option will change that:



          tree -l /sys/class/hwmon/


          but you’ll have fun making sense of all the output.






          share|improve this answer





















          • Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
            – Thoughtcraft
            Dec 2 at 20:22






          • 2




            @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
            – sourcejedi
            Dec 2 at 21:06












          • Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
            – Thoughtcraft
            Dec 2 at 21:14










          • Might want to check for infinite loops.
            – Joshua
            Dec 3 at 0:48






          • 1




            @Joshua tree -l does that on its own.
            – Stephen Kitt
            Dec 3 at 5:13















          up vote
          8
          down vote



          accepted










          tree behaves that way because it doesn’t dereference symlinks by default. The -l option will change that:



          tree -l /sys/class/hwmon/


          but you’ll have fun making sense of all the output.






          share|improve this answer





















          • Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
            – Thoughtcraft
            Dec 2 at 20:22






          • 2




            @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
            – sourcejedi
            Dec 2 at 21:06












          • Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
            – Thoughtcraft
            Dec 2 at 21:14










          • Might want to check for infinite loops.
            – Joshua
            Dec 3 at 0:48






          • 1




            @Joshua tree -l does that on its own.
            – Stephen Kitt
            Dec 3 at 5:13













          up vote
          8
          down vote



          accepted







          up vote
          8
          down vote



          accepted






          tree behaves that way because it doesn’t dereference symlinks by default. The -l option will change that:



          tree -l /sys/class/hwmon/


          but you’ll have fun making sense of all the output.






          share|improve this answer












          tree behaves that way because it doesn’t dereference symlinks by default. The -l option will change that:



          tree -l /sys/class/hwmon/


          but you’ll have fun making sense of all the output.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Dec 2 at 20:19









          Stephen Kitt

          160k24357432




          160k24357432












          • Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
            – Thoughtcraft
            Dec 2 at 20:22






          • 2




            @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
            – sourcejedi
            Dec 2 at 21:06












          • Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
            – Thoughtcraft
            Dec 2 at 21:14










          • Might want to check for infinite loops.
            – Joshua
            Dec 3 at 0:48






          • 1




            @Joshua tree -l does that on its own.
            – Stephen Kitt
            Dec 3 at 5:13


















          • Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
            – Thoughtcraft
            Dec 2 at 20:22






          • 2




            @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
            – sourcejedi
            Dec 2 at 21:06












          • Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
            – Thoughtcraft
            Dec 2 at 21:14










          • Might want to check for infinite loops.
            – Joshua
            Dec 3 at 0:48






          • 1




            @Joshua tree -l does that on its own.
            – Stephen Kitt
            Dec 3 at 5:13
















          Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
          – Thoughtcraft
          Dec 2 at 20:22




          Wow, that is indeed some confusing output. Is there a way to get the structure as it would appear if I browsed through it?
          – Thoughtcraft
          Dec 2 at 20:22




          2




          2




          @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
          – sourcejedi
          Dec 2 at 21:06






          @Thoughtcraft the problem is mostly because the device link goes up the tree (to the parent device), therefore this command shows the entire device tree, not just a few subtrees. I guess you can do e.g. tree -d /sys/class/hwmon/*/ to show the directory structure and symlinks to directories, and chase the device links yourself.
          – sourcejedi
          Dec 2 at 21:06














          Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
          – Thoughtcraft
          Dec 2 at 21:14




          Awesome, if I want to go deeper I can keep adding stars like: tree -d -R /sys/class/hwmon/*/*/ */*
          – Thoughtcraft
          Dec 2 at 21:14












          Might want to check for infinite loops.
          – Joshua
          Dec 3 at 0:48




          Might want to check for infinite loops.
          – Joshua
          Dec 3 at 0:48




          1




          1




          @Joshua tree -l does that on its own.
          – Stephen Kitt
          Dec 3 at 5:13




          @Joshua tree -l does that on its own.
          – Stephen Kitt
          Dec 3 at 5:13


















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