Get list of drives

[T-bear]

How can i in lazarus get a list of all drives connected to a computer. I saw on some delphi pages a procedure "GetDriveType" does this exist in lazarus too, or is there something similar?
TY!

[BigChimp]

This wiki page maybe?
http://wiki.lazarus.freepascal.org/Windows_Programming_Tips#Listing_all_available_drives

[TurboRascal]

Interesting. Is there some example how to enumerate filesystems in unixes? Like 'mount' (or 'df)'command does...

[timppl]

Simply read /etc/mtab; it shows all mounted drives ( strictly it shows all mounts ) .

Regards

Tim

[BigChimp]

Tim, do you know whether that will that work on Solaris, FreeBSD, OSX as well?

[felipemdc]

Simply read /etc/mtab; it shows all mounted drives ( strictly it shows all mounts ) .

Nice, I have put it in the wiki in a new page for linux tips: http://wiki.lazarus.freepascal.org/Linux_Programming_Tips#Get_the_list_of_mounted_partitions

[TurboRascal]

Simply read /etc/mtab; it shows all mounted drives ( strictly it shows all mounts ) .

Thanks, I cannot believe I forgot about it!  Simple and effective...

Tim, do you know whether that will that work on Solaris, FreeBSD, OSX as well?

AFAIK it should work with all unix-like systems, IIRC it's a Unix SysV thing...

Nice, I have put it in the wiki in a new page for linux tips:
...

Great idea to finally have one for linux too 

[ludob]

Tim, do you know whether that will that work on Solaris, FreeBSD, OSX as well?

AFAIK it should work with all unix-like systems, IIRC it's a Unix SysV thing...

On Solaris 10 it is in /etc/mnttab. Also note that on Solaris a lot of stuff is mounted, including /lib/libc.so.1 and  /etc/mnttab itself 

[benohb]

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Simply read /etc/mtab; it shows all mounted drives ( strictly it shows all mounts ) .

This is a mistake
Mtab contains information for * how to mount FS*


For a list of devices on Linux ... Explore

/proc

You will find all the details
Example :

for All parts

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/proc/partitions

mounted

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/proc/mounts

Information Processor

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/proc/cpuinfo

Memory information

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/proc/meminfo

Network

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/proc/self/net/arp
Input devices

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/proc/bus/input/devices

More

/proc/sys

largely (/proc) Contains all the information system and logistics and drivers ...And many...
http://www.thegeekstuff.com/2010/11/linux-proc-file-system/

[ludob]

This is a mistake
Mtab contains information for * how to mount FS*

Hmm.
* how to mount FS* = fstab
* what is mounted* = mtab

From 'man mount':

The programs mount and umount maintain a list of currently mounted filesystems in the file /etc/mtab. If no arguments are given to mount, this list is printed.

When the proc filesystem is mounted (say at /proc), the files /etc/mtab and /proc/mounts have very similar contents.

[TurboRascal]

Also mtab can be used on many different unix OS-es, while linux procfs is, well, linux specific...

[BigChimp]

Also mtab can be used on many different unix OS-es, while linux procfs is, well, linux specific...

Though apparently not in Solaris (see above) or FreeBSD (if this http://onlamp.com/pub/a/bsd/2005/01/13/FreeBSD_Basics.html is still correct) or AIX (found some old forum post asking for that; may have been fixed meanwhile, and FPC doesn't have an AIX port anyway

Would parsing the output of mount be any better? I suspect various *nix flavours will have various output formats as well...

[TurboRascal]

Well, it is true that various unixes have traditionally done the same things differently

I would avoid calling external programs if possible, however. I'd still prefer to parse different files configured with ifdefs because their formats are different as well, like you said (at the very least the disk device names are different).

Now I wonder if there exists a POSIX standard for this...

[benohb]

Hmm.
* how to mount FS* = fstab
* what is mounted* = mtab

That's right , I did not  attention to the letters 



But sometimes .. There are no partition  in  fstab
This means manually  mount 

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Now I wonder if there exists a POSIX standard for this...

May be different places .. but these systems easy access to information services

[ludob]

A quick look in the source code of df shows that the list of mounted drives is retrieved with the getmntent family of functions. Docs for getmntent specify the use of /etc/mtab or /etc/mnttab as the source of info.
The use of getmntent et.al. doesn't make life easier. A lot of function name and parameter variations exist. The file mountlist.c (http://siarzhuk.dyndns.org/haiku/doxygen/coreutils_2lib_2mountlist_8c_source.html) shows how the mount list is retrieved on all systems supported by gnu df. Basically a different method for every unix flavor ...