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Annotation of 43BSD/ucb/dbx/tests/noenv.c, revision 1.1.1.1

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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