_argc

[Fraser 2]

When I run my program from the IDE of 11.3 I am finding that _argc is 0 when I have not set any parameters.  So _argv[0] is not the program name as is the documented functionality.  I've not seen this before with any other version of C++ Builder.  If I set a parameter then _argc will be 1 and _argv[0] will be the parameter so there is not an error in how I use these variables.  I made a small test program but the problem would not show up.

[Remy Lebeau 1263]

7 hours ago, Fraser said:

I am finding that _argc is 0 when I have not set any parameters.  So _argv[0] is not the program name as is the documented functionality.

Putting the program name in argv[0] is only a convention, not a guarantee.  It depends on how the caller passes parameters when spawning the process.  And it is possible to spawn a process without the program name as the first parameter.

 

You can instead use ParamStr(0) (or Application->ExeName in VCL) to get the program name.

[Fraser 2]

The standard says when argc>0 argv[0] holds the program name or is empty.  What I see is my parameter, which is neither of those.

[Fraser 2]

My program works as expected outside of the IDE.  There is clearly a bug with C++ Builder 11.3.

[Roger Cigol 88]

1 hour ago, Fraser said:

The standard says when argc>0 argv[0] holds the program name or is empty.  What I see is my parameter, which is neither of those.

But you said originally that in your case argc was equal to zero (ie it is NOT > 0). 

[Der schöne Günther 306]

It was said it's either

1. argc == 0
2. argc >= 1, with argc[0] being the first parameter, not the program name/path, as expected

 

I agree that it's more than odd and against everything else I've seen. For sure, nobody enforces it, and you can even omit the program name yourself by using things like CreateProcess(..).

However, ISO/IEC 9899 is pretty clear on that:

Quote

If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment. If the value of argc is greater than one, the strings pointed to by argv[1] through argv[argc-1] represent the program parameters

 

PS: It's probably a regression by this bugfix which was closed in April:

https://quality.embarcadero.com/browse/RSP-41397

https://quality.embarcadero.com/browse/RSP-41179

Edited June 23, 2023 by Der schöne Günther

[Fraser 2]

It appears to unresolved with 11.3.  There is a few duplicate reports so it has been noticed by many people.