/* main.c: handles initialization of rc and command line options */ #include "rc.h" bool dashdee, dashee, dashvee, dashex, dashell, dasheye, dashen, dashpee, interactive; int rc_pid; static bool dashoh; static void assigndefault(char *,...); static void checkfd(int, enum redirtype); extern void main(int argc, char *argv[], char *envp[]) { char *dashsee[2], *dollarzero, *null[1]; int c; initprint(); dashsee[0] = dashsee[1] = NULL; dollarzero = argv[0]; rc_pid = getpid(); dashell = (*argv[0] == '-'); /* Unix tradition */ while ((c = rc_getopt(argc, argv, "nolpeivdxc:")) != -1) switch (c) { case 'l': dashell = TRUE; break; case 'e': dashee = TRUE; break; case 'i': dasheye = interactive = TRUE; break; case 'v': dashvee = TRUE; break; case 'x': dashex = TRUE; break; case 'd': dashdee = TRUE; break; case 'c': dashsee[0] = rc_optarg; goto quitopts; case 'n': dashen = TRUE; break; case 'p': dashpee = TRUE; break; case 'o': dashoh = TRUE; break; case '?': exit(1); } quitopts: argv += rc_optind; /* use isatty() iff -i is not set, and iff the input is not from a script or -c flag */ if (!dasheye && dashsee[0] == NULL && *argv == NULL) interactive = isatty(0); if (!dashoh) { checkfd(0, rFrom); checkfd(1, rCreate); checkfd(2, rCreate); } initsignal(); inithash(); initparse(); assigndefault("prompt", "; ", "", (void *)0); assigndefault("path", DEFAULTPATH, (void *)0); assigndefault("ifs", " ", "\t", "\n", (void *)0); assigndefault("pid", nprint("%d", rc_pid), (void *)0); initenv(envp); initinput(); null[0] = NULL; starassign(dollarzero, null, FALSE); /* assign $0 to $* */ inithandler(); if (dashsee[0] != NULL) { /* input from the -c flag? */ if (*argv != NULL) starassign(dollarzero, argv, FALSE); pushstring(dashsee, TRUE); } else if (*argv != NULL) { /* else from a file? */ b_dot(--argv); rc_exit(getstatus()); } else { /* else stdin */ pushfd(0); } dasheye = FALSE; doit(TRUE); rc_exit(getstatus()); } static void assigndefault(char *name,...) { va_list ap; List *l; char *v; va_start(ap, name); for (l = NULL; (v = va_arg(ap, char *)) != NULL;) l = append(l, word(v, NULL)); varassign(name, l, FALSE); if (streq(name, "path")) alias(name, l, FALSE); va_end(ap); } /* open an fd on /dev/null if it is inherited closed */ static void checkfd(int fd, enum redirtype r) { int new = rc_open("/dev/null", r); if (new != fd && new != -1) close(new); }