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Annotation of 43BSDReno/pgrm/dbx/tests/noenv.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Exec a program with no environment.
        !             3:  */
        !             4: 
        !             5: #include <stdio.h>
        !             6: 
        !             7: extern int errno;
        !             8: extern char *getenv(), *index();
        !             9: 
        !            10: main (argc, argv)
        !            11: int argc;
        !            12: char *argv[];
        !            13: {
        !            14:     execvep(argv[1], &argv[1], 0);
        !            15:     printf("exec failed, errno %d\n", errno);
        !            16: }
        !            17: 
        !            18: execvep (name, argv, envp)
        !            19: char *name, *argv[], *envp[];
        !            20: {
        !            21:     char *path;
        !            22:     register char *cp;
        !            23:     char fullname[1000];
        !            24: 
        !            25:     path = getenv("PATH");
        !            26:     if (path == NULL) {
        !            27:        path = "";
        !            28:        cp = NULL;
        !            29:     } else {
        !            30:        cp = index(path, ':');
        !            31:     }
        !            32:     for (;;) {
        !            33:        if (cp != NULL) {
        !            34:            *cp = '\0';
        !            35:        }
        !            36:        sprintf(fullname, "%s/%s", path, name);
        !            37:        execve(fullname, argv, envp);
        !            38:        if (cp != NULL) {
        !            39:            path = cp + 1;
        !            40:            cp = index(path, ':');
        !            41:        } else {
        !            42:            break;
        !            43:        }
        !            44:     }
        !            45:     return -1;
        !            46: }

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