🚀 go-pugleaf

In <19920813.054753.507@almaden.ibm.com> BJ Hargrave writes:
>PSZ buff = "C:\\OS2\\CMD.EXE\0/C Echo Hello!";
>
>rc = DosExecPgm ( NULL,                 /* Object name buffer         */
>                  0,                    /* len of object name buffer  */
>                  EXEC_SYNC,            /* execute synchronously      */
>                  buff,                 /* arguments                  */
>                  NULL,                 /* environment                */
>                  (PRESULTCODES)&exec_rc,       /* return codes       */
>                  buff );               /* program to execute         */
>
>Notice the \0 after the program name. The last argument to DosExecPgm
>uses the first SZ from buff for the program name and 4th argument to
>DosExecPgm uses the first SZ as argv<0> and the second SZ as the
>arguments to the program!

As was duly noted by another vigilant IBMer, buff should be as follows:

PSZ buff = "C:\\OS2\\CMD.EXE\0/C Echo Hello!\0";
                                            ^^
The last \0 is necessary to signal the end of the strings.
A trailing zero byte is added by C, thus buff ens with 2 zero bytes.
The 4th argument to DosExecPgm is a series of SZ's punctuated by a zero
byte.

-----------------------------------------------------------------------
BJ Hargrave                     Internet: fattire@vnet.ibm.com
Boca Raton, FL                  IBMIPNet: bjhar@bjhar.bocaraton.ibm.com