58 initarg(struct arglist *al)  in initarg()  argument
60 	al->argc = 0;  in initarg()
61 	al->maxc = 10;  in initarg()
62 	if ((al->argv = calloc(al->maxc, sizeof (char *))) == NULL)  in initarg()
67 addarg(struct arglist *al, const char *arg)  in addarg()  argument
70 	if (al->argc == al->maxc) {  in addarg()
71 		al->maxc <<= 1;  in addarg()
72 		al->argv = realloc(al->argv, al->maxc * sizeof (char *));  in addarg()
73 		if (al->argv == NULL)  in addarg()
77 		al->argv[al->argc++] = NULL;  in addarg()
78 	else if ((al->argv[al->argc++] = strdup(arg)) == NULL)  in addarg()
91 	struct arglist al;  in main()  local
102 	initarg(&al);  in main()
103 	addarg(&al, argv[0]);  in main()
107 			addarg(&al, argv[i]);  in main()
108 		addarg(&al, NULL);  in main()
113 		execve(_PATH_DEFAULTMTA, al.argv, envp);  in main()
149 					addarg(&al, ap);  in main()
160 		addarg(&al, argv[i]);  in main()
162 	addarg(&al, NULL);  in main()
163 	execve(to, al.argv, envp);  in main()