-------- Original Message -------- Subject: CMDXSWP.COM missing from list of DOS shells Date: Fri, 02 Apr 2004 22:11:25 GMT From: Fabrizio Gennari <[EMAIL PROTECTED]> Organization: TIN Newsgroups: comp.os.msdos.djgpp
FreeDOS distributes a shell called CMDXSWP.COM, which is a DOS-style shell. i.e. requires the /c switch when launching commands. Unfortunately, it is not present in the list of DOS-style shells present in the file libc/dos/process/dosexec.c, variable shell_brokets. Since FreeDOS by default sets the COMSPEC env variable to point to this, it may cause problems: for example, the system() function invokes the shell without /c, causing the invocation to fail.
Example: take this somple program
int main(){
system("echo Hello World!");
return 0;
}, compile it with DJGPP, and run it on a FreeDOS system with FreeDOS installed, no SHELL variable and the variable COMSPEC pointing to CMDXSWP.COM . It fails, because system(), detecting that echo is not an executable file, tries to launch the shell, passing "echo Hello World!" as the parameter. Unfortunately, it does that without the /c switch.
The fix would be to include CMDXSWP.COM in dosexec.c. A workaround is to set the SHELL variable to COMMAND.COM, which is correctly detected by DJGPP as being a DOS-style shell.
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