setting execv arguments

[Douglas Dillon]

I am trying to use tiffcp to reconfigure tif files (if they are tiled)
to nontiled so I can use existing code to handle them. However, I am
having issues providing the arguments. The app is run from a temp
directory which has local copy of tiffcp.

///////////////////////////////////////////////////////////////////////////
char *args[] = { "tiffcp", "-p", "contig", "-s", "-r", "1", "-c",
"none", stripe->tif_file_name, dstfile };

if (execv(NULL, args) == -1)
///////////////////////////////////////////////////////////////////////////

What is the proper format?

Thanks,

Douglas

 

[Walter Roberson]

:I am trying to use tiffcp to reconfigure tif files (if they are tiled)
:to nontiled so I can use existing code to handle them. However, I am
:having issues providing the arguments. The app is run from a temp
:directory which has local copy of tiffcp.

:char *args[] = { "tiffcp", "-p", "contig", "-s", "-r", "1", "-c",
:"none", stripe->tif_file_name, dstfile };

:if (execv(NULL, args) == -1)

execv() is not part of C itself, so this is not covered by the C standard.

:What is the proper format?

I've never seen NULL as the first argument of execv() before.
The first argument should be the path to the executable. If it is in
your current directory, then you would use "./tiffcp" as the path
in your case.

 

[Mark McIntyre]

I am trying to use tiffcp to reconfigure tif files

neither this...

if (execv(NULL, args) == -1)

.... nor this....

What is the proper format?

.... is defined by the C standard. Its thus offtopic here, and you'd be better to
ask in comp.unix.programming.

 

[Jens.Toerring]

:I am trying to use tiffcp to reconfigure tif files (if they are tiled)
:to nontiled so I can use existing code to handle them. However, I am
:having issues providing the arguments. The app is run from a temp
:directory which has local copy of tiffcp.

:char *args[] = { "tiffcp", "-p", "contig", "-s", "-r", "1", "-c",
:"none", stripe->tif_file_name, dstfile };

:if (execv(NULL, args) == -1)

execv() is not part of C itself, so this is not covered by the C standard.

And thus questions should be asked in e.g. comp.unix.programmer;-)

:What is the proper format?

I've never seen NULL as the first argument of execv() before.
The first argument should be the path to the executable. If it is in
your current directory, then you would use "./tiffcp" as the path
in your case.

<OT>
And you need a additional NULL pointer at the end of the 'args' array.
</OT>
Regards, Jens