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Annotation of os2sdk/demos/examples/getenv/getenv.c, revision 1.1.1.2

1.1       root        1: /*
1.1.1.2 ! root        2:  * Example of DosGenEnv usage
1.1       root        3:  *
                      4:  * This call gets the addresses of the environment strings and command
                      5:  * line arguments belonging to the current process
                      6:  *
1.1.1.2 ! root        7:  * Compile as: cl -AL -Lp -G0 getenv.c
1.1       root        8:  *
1.1.1.2 ! root        9:  * Created by Microsoft Corp. 1986
1.1       root       10:  */
                     11: 
1.1.1.2 ! root       12: #define INCL_DOSMISC
        !            13: 
        !            14: #include <os2def.h>
        !            15: #include <bsedos.h>
1.1       root       16: 
                     17: main()
                     18: {
1.1.1.2 ! root       19:        USHORT EnvSegment;      /* Segment handle to the env strings */
        !            20:        USHORT CmdOffset;       /* Offset within EnvSegment where the
        !            21:                                   command line arguments can be found */
        !            22:        char *arg;              /* Pointer to data */
1.1       root       23: 
1.1.1.2 ! root       24:        DosGetEnv(&EnvSegment,&CmdOffset); /* Get environment information */
1.1       root       25: 
                     26:        /* Set arg to point to the environment strings */
                     27:        arg = (char *)((long)EnvSegment << 16);
                     28: 
                     29:        /* Print first environment string */
                     30:        printf("Environment parameter #1: %s\n",arg);
                     31: 
                     32:        /* Set arg to point to the command line arguments */
                     33:        arg = (char *)(((long)EnvSegment << 16) + CmdOffset);
                     34: 
                     35:        /* Print first command line argument */
                     36:        printf("Command line argument #1: %s\n",arg);
                     37: }

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