Re: Need Simple Way To Determine If File Is Executable
Fredrik Lundh [EMAIL PROTECTED] schrieb Sebastian 'lunar' Wiesner wrote: no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Only if you have your system set up badly. The current directory should not be in the search path, and it especially shouldn't have higher priority than the regular bin locations. and the award for completely missing the context of this subthread goes to... Nevertheless his comment was absolutely correct... nope. a Unix system uses the same flag to determine if a file is executable no matter how I've set up my path. Paul didn't even mention the word executable. He was referring to completely different thing: The fact, that whether a local executable overrides a shared on, is matter of how you set your PATH. The local file would be executable, whether it is in the PATH or not... -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Fredrik Lundh [EMAIL PROTECTED] schrieb Sebastian 'lunar' Wiesner wrote: you're confusing the shell's is this file executable check with the loader's can I execute this file check: $ export PATH=.:$PATH $ dd if=/dev/zero of=ls count=1 1+0 records in 1+0 records out $ ls -l ls -rw-rw-r-- 1 slab slab 512 Dec 20 03:33 ls $ chmod a+x ls $ ls -bash: ./ls: cannot execute binary file ??? Am I blind or is there really no difference between you shell example an mine? As far as I can see, you are doing exactly the same thing as I did... no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Well, that doesn't tell us anything about, whether a file executable or not. But anyway: you admit, that the local file ls is __not__ actually executable, although it has the x-bit set? So what are trying to proof? that you're wrong when you claim that the contents of the file matters when using the usual Unix conventions to check if a file is executable. Let me ask you a question: [EMAIL PROTECTED]:09:52] ~/test -- cat test.sh #!/bin/bash if [ $1 ]; then echo Hello $1 else echo Hello world fi [EMAIL PROTECTED]:09:54] ~/test -- ll test.sh -rw-r--r-- 1 lunar lunar 76 2006-12-21 13:09 test.sh Is test.sh now executable or not? Bye lunar -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Sebastian 'lunar' Wiesner wrote: no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Only if you have your system set up badly. The current directory should not be in the search path, and it especially shouldn't have higher priority than the regular bin locations. and the award for completely missing the context of this subthread goes to... Nevertheless his comment was absolutely correct... nope. a Unix system uses the same flag to determine if a file is executable no matter how I've set up my path. Paul didn't even mention the word executable. He was referring to completely different thing: The fact, that whether a local executable overrides a shared on, is matter of how you set your PATH. The local file would be executable, whether it is in the PATH or not... are you trying to win some kind of award? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Sebastian 'lunar' Wiesner [EMAIL PROTECTED] wrote: Fredrik Lundh [EMAIL PROTECTED] schrieb Sebastian 'lunar' Wiesner wrote: you're confusing the shell's is this file executable check with the loader's can I execute this file check: ... Well, that doesn't tell us anything about, whether a file executable or not. But anyway: you admit, that the local file ls is __not__ actually executable, although it has the x-bit set? Sebastian, you really have missed the point of this thread. The original question was how can I find out if a file is executable. The answer involved calling stat. On a Linux system, using stat, the definition of executable is has the x mode bit set. On a Windows system, using stat, the definition is has an extension that is in PATHEXT. Nothing more, nothing less. In both cases, the contents of the file are irrelevant. Now, when you, as a human being, try answer the question is this file executable, you would use more sophisticated criteria that looked at the first bytes of the file, but that's not the question here. -- Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Gabriel Genellina [EMAIL PROTECTED] schrieb On 17 dic, 19:21, Roger Upole [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. A similar function exists on Linux too. But even if a file has the right file format, if it does not have the execute bit set, won't run. And you could set that bit on a JPG image too - and nothing good would happen, I presume. Really? I don't think so. Afaik on Linux executable binary files need an ELF header. [EMAIL PROTECTED]:15:43] ~/Bilder -- chmod a+x VM-Background.png [EMAIL PROTECTED]:15:46] ~/Bilder -- ./VM-Background.png bash: ./VM-Background.png: cannot execute binary file As you can see, binary files without such a header are not executed... Bye lunar -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Tim Roberts [EMAIL PROTECTED] schrieb Gabriel Genellina [EMAIL PROTECTED] wrote: On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. Yes, of course, you're right. I was about to delve into a philosophical discussion about the difference in handling this between Linux and Windows, but they're both just conventions. One is based on an arbitrary flag, one is based on a file extension. Contents are irrelevant. No, they aren't! Try this: [EMAIL PROTECTED]:24:44] ~/test -- dd if=/dev/zero of=test.sh count=1 1+0 records in 1+0 records out 512 bytes (512 B) copied, 6.5e-05 seconds, 7.9 MB/s [EMAIL PROTECTED]:24:46] ~/test -- chmod a+x test.sh [EMAIL PROTECTED]:24:55] ~/test -- ./test.sh bash: ./test.sh: cannot execute binary file A file containing only zeros isn't executed... -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Sebastian 'lunar' Wiesner wrote: No, they aren't! Try this: you're confusing the shell's is this file executable check with the loader's can I execute this file check: $ export PATH=.:$PATH $ dd if=/dev/zero of=ls count=1 1+0 records in 1+0 records out $ ls -l ls -rw-rw-r-- 1 slab slab 512 Dec 20 03:33 ls $ chmod a+x ls $ ls -bash: ./ls: cannot execute binary file /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Fredrik Lundh [EMAIL PROTECTED] schrieb Sebastian 'lunar' Wiesner wrote: No, they aren't! Try this: you're confusing the shell's is this file executable check with the loader's can I execute this file check: $ export PATH=.:$PATH $ dd if=/dev/zero of=ls count=1 1+0 records in 1+0 records out $ ls -l ls -rw-rw-r-- 1 slab slab 512 Dec 20 03:33 ls $ chmod a+x ls $ ls -bash: ./ls: cannot execute binary file ??? Am I blind or is there really no difference between you shell example an mine? As far as I can see, you are doing exactly the same thing as I did... So what are trying to proof? Sebastian -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
In [EMAIL PROTECTED], Sebastian 'lunar' Wiesner wrote: Gabriel Genellina [EMAIL PROTECTED] schrieb A similar function exists on Linux too. But even if a file has the right file format, if it does not have the execute bit set, won't run. And you could set that bit on a JPG image too - and nothing good would happen, I presume. Really? I don't think so. Afaik on Linux executable binary files need an ELF header. There are other executable loaders for `a.out` and `COFF` in the kernel, and with the `binfmt_misc` module you can make anything with a magic header executable, including Python scripts/bytecode and even JPEG images. http://www.tat.physik.uni-tuebingen.de/~rguenth/linux/binfmt_misc.html Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Sebastian 'lunar' Wiesner wrote: you're confusing the shell's is this file executable check with the loader's can I execute this file check: $ export PATH=.:$PATH $ dd if=/dev/zero of=ls count=1 1+0 records in 1+0 records out $ ls -l ls -rw-rw-r-- 1 slab slab 512 Dec 20 03:33 ls $ chmod a+x ls $ ls -bash: ./ls: cannot execute binary file ??? Am I blind or is there really no difference between you shell example an mine? As far as I can see, you are doing exactly the same thing as I did... no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. So what are trying to proof? that you're wrong when you claim that the contents of the file matters when using the usual Unix conventions to check if a file is executable. maybe you should read Tim's post and the post he replied to again? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Marc 'BlackJack' Rintsch [EMAIL PROTECTED] schrieb In [EMAIL PROTECTED], Sebastian 'lunar' Wiesner wrote: Gabriel Genellina [EMAIL PROTECTED] schrieb A similar function exists on Linux too. But even if a file has the right file format, if it does not have the execute bit set, won't run. And you could set that bit on a JPG image too - and nothing good would happen, I presume. Really? I don't think so. Afaik on Linux executable binary files need an ELF header. There are other executable loaders for `a.out` and `COFF` in the kernel, and with the `binfmt_misc` module you can make anything with a magic header executable, including Python scripts/bytecode and even JPEG images. Yes, I know... But ELF is actually the most common linker format on Linux systems. a.out is a legacy format, that is afaik not used by any modern distribution. Concerning COFF I'm not sure, if there is really a COFF loader in the kernel. At least I did not find any information about such a loader in the kernel configuration. It just lists elf, a.out and binfmt_misc. But basically you're right. One could even write a loader for JPEG files. But as long as such an loader is not part of a standard linux distribution, nothing bad happens when you try to execute a JPEG file, and that's what I wanted to point out. Sebastian -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Paul Arthur wrote: no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Only if you have your system set up badly. The current directory should not be in the search path, and it especially shouldn't have higher priority than the regular bin locations. and the award for completely missing the context of this subthread goes to... /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Fredrik Lundh [EMAIL PROTECTED] schrieb Paul Arthur wrote: no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Only if you have your system set up badly. The current directory should not be in the search path, and it especially shouldn't have higher priority than the regular bin locations. and the award for completely missing the context of this subthread goes to... Nevertheless his comment was absolutely correct... -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Sebastian 'lunar' Wiesner wrote: no, I'm showing that a local file marked as executable overrides a shared one, even if the local file isn't actually an executable. Only if you have your system set up badly. The current directory should not be in the search path, and it especially shouldn't have higher priority than the regular bin locations. and the award for completely missing the context of this subthread goes to... Nevertheless his comment was absolutely correct... nope. a Unix system uses the same flag to determine if a file is executable no matter how I've set up my path. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
On 17 dic, 19:21, Roger Upole [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. A similar function exists on Linux too. But even if a file has the right file format, if it does not have the execute bit set, won't run. And you could set that bit on a JPG image too - and nothing good would happen, I presume. So one must determine first what means the file is executable. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Gabriel Genellina wrote: On 17 dic, 19:21, Roger Upole [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. A similar function exists on Linux too. But even if a file has the right file format, if it does not have the execute bit set, won't run. And you could set that bit on a JPG image too - and nothing good would happen, I presume. So one must determine first what means the file is executable. Well... sure, but that isn't the point. Here is the problem I was trying to solve: I wrote and maintain the 'twander' cross-platform file browser: http://www.tundraware.com/Software/twander/ I was working on a new release and wanted to add file associations to it. That is, if the user selected a file and double clicked or pressed Enter, I wanted the following behavior (in the following steps, type means nothing more than a file whose name ends with a particular string): 1) If an association for that file type exists, run the associated program. 2) If an association for that file type does not exist: a) If the file is not executable, see if there is a default association defined and run that program if there is. b) If the file *is* executable, run it. So ... all I really needed to know is whether or not the OS thinks the file is executable. Obvious - and this is true on most any system - you can create the situation where the file appear executable from the OS's point of view, but it is not actually. But this is a pathology that no application should really be expected to cope with... -- Tim Daneliuk [EMAIL PROTECTED] PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
At Monday 18/12/2006 13:41, Tim Daneliuk wrote: I was working on a new release and wanted to add file associations to it. That is, if the user selected a file and double clicked or pressed Enter, I wanted the following behavior (in the following steps, type means nothing more than a file whose name ends with a particular string): 1) If an association for that file type exists, run the associated program. 2) If an association for that file type does not exist: a) If the file is not executable, see if there is a default association defined and run that program if there is. b) If the file *is* executable, run it. This is what os.startfile does. The underlying Win32 functions would be ShellExecute, FindExecutable their variants. Will you maintain your own registry for associations? -- Gabriel Genellina Softlab SRL __ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam ¡gratis! ¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Gabriel Genellina wrote: At Monday 18/12/2006 13:41, Tim Daneliuk wrote: I was working on a new release and wanted to add file associations to it. That is, if the user selected a file and double clicked or pressed Enter, I wanted the following behavior (in the following steps, type means nothing more than a file whose name ends with a particular string): 1) If an association for that file type exists, run the associated program. 2) If an association for that file type does not exist: a) If the file is not executable, see if there is a default association defined and run that program if there is. b) If the file *is* executable, run it. This is what os.startfile does. The underlying Win32 functions would be And on Windows, that's exactly what I use. ShellExecute, FindExecutable their variants. Will you maintain your own registry for associations? Yes, because I want common configuration syntax and runtime semantics across FreeBSD, Linux, Windows, et al. The only semantic difference is that, on Windows, if my own association is not found, then the Windows association will apply. This cannot be done in the *nix environment - at least not easily - because there is no common association repository across the various window managers, nor is there a startfile() type call in the POSIX world. This is implemented already and largely works as planned. There are a few subtleties I want to work into the next release, but things work as expected today... -- Tim Daneliuk [EMAIL PROTECTED] PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Gabriel Genellina [EMAIL PROTECTED] wrote: On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. Yes, of course, you're right. I was about to delve into a philosophical discussion about the difference in handling this between Linux and Windows, but they're both just conventions. One is based on an arbitrary flag, one is based on a file extension. Contents are irrelevant. -- Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Gabriel Genellina wrote: On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. -- Gabriel Genellina On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. Roger == Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News== http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups = East and West-Coast Server Farms - Total Privacy via Encryption = -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Roger Upole wrote: Gabriel Genellina wrote: On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. -- Gabriel Genellina On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. Roger Yabut ... what about things like batch files? Does it return them as executable as well? -- Tim Daneliuk [EMAIL PROTECTED] PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Tim Daneliuk wrote: Roger Upole wrote: Gabriel Genellina wrote: On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. -- Gabriel Genellina On windows, you can use win32file.GetBinaryType to check if a file is actually a binary executable. Roger Yabut ... what about things like batch files? Does it return them as executable as well? No, it's strictly for binary executables. Roger == Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News== http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups = East and West-Coast Server Farms - Total Privacy via Encryption = -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
On 16 dic, 04:47, Tim Roberts [EMAIL PROTECTED] wrote: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. Isn't the same with any other recipe, portable or not? Unless the OS actually tries to load and examine the file contents, which the OS's I'm aware of, don't do. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
[Tim Daneliuk] I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? I'm fairly certain the answer is no. What follows is a relatively low-level and certainly not portable discussion. The last couple of times this question came up on the list I looked into the implementation and experimented a bit but in short I would say that os.stat / os.access were near enough useless for determining executablility under Windows. That's not down to Python as such; it's simply passing back what the crt offers. Of course that raises the slightly wider issue of: should the Python libs do more than simply call the underlying crt especially when that's known to give, perhaps misleading results? But I'm in no position to answer that. I suggest that for Windows, you either use the PATHEXT env var and determine whether a given file ends with one of its components. Or -- and this depends on your definition of executable under Windows -- use the FindExecutable win32 API call (exposed in the win32api module of pywin32 and available via ctypes) which will return the executable for anything which has an association defined. So the executable for a Word doc is the winword.exe program. The executable for an .exe is itself. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Tim Golden wrote: [Tim Daneliuk] I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? I'm fairly certain the answer is no. What follows is a relatively low-level and certainly not portable discussion. The last couple of times this question came up on the list I looked into the implementation and experimented a bit but in short I would say that os.stat / os.access were near enough useless for determining executablility under Windows. That's not down to Python as such; it's simply passing back what the crt offers. Of course that raises the slightly wider issue of: should the Python libs do more than simply call the underlying crt especially when that's known to give, perhaps misleading results? But I'm in no position to answer that. I suggest that for Windows, you either use the PATHEXT env var and determine whether a given file ends with one of its components. Or -- and this depends on your definition of executable under Windows -- use the FindExecutable win32 API call (exposed in the win32api module of pywin32 and available via ctypes) which will return the executable for anything which has an association defined. So the executable for a Word doc is the winword.exe program. The executable for an .exe is itself. TJG This seems to work, at least approximately: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH It probably does not catch every single instance of something that could be considered executable because this is a sort of fluid thing in Windows (as you point out). -- Tim Daneliuk [EMAIL PROTECTED] PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Tim Daneliuk [EMAIL PROTECTED] wrote: This seems to work, at least approximately: os.stat(selected)[ST_MODE] (S_IXUSR|S_IXGRP|S_IXOTH It probably does not catch every single instance of something that could be considered executable because this is a sort of fluid thing in Windows (as you point out). This will tell you that x.exe is executable, even if x.exe contains nothing but zeros. On the other hand, I'm not convinced that any other solution is better. -- Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Need Simple Way To Determine If File Is Executable
I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? Thanks, Tim Daneliuk [EMAIL PROTECTED] PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
Tim Daneliuk wrote: I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? os.access(pathToFile, os.X_OK) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Simple Way To Determine If File Is Executable
At Thursday 14/12/2006 19:21, John McMonagle wrote: I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? os.access(pathToFile, os.X_OK) That won't work on Windows. You have to define what do you mean by a file is set as executable on Windows. a.exe is executable and nobody would discuss that. I can supress the extension and type simply: a, on the command line, and get a.exe executed. Same for a.com What about a.bat? cmd.exe is executed and runs the batch file. I can even omit the extension. Is a.bat executable then? What about a.py? Another process starts and handles the file (python.exe). Is a.py executable then? I can type a.mdb on the command prompt and launch an Access application. Is a.mdb executable then? If I type a.doc on the command prompt, Word is executed and opens that file. Is a.doc executable then? The answer may be so narrow to just consider .exe .com and a few more, or so broad to consider all things that os.startfile can handle without error. -- Gabriel Genellina Softlab SRL __ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam ¡gratis! ¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar -- http://mail.python.org/mailman/listinfo/python-list
