projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 2efe1df4 C |
1 | /* main.c: handles initialization of rc and command line options */ |
| 2 | ||
| 3 | #include "rc.h" | |
| 4 | ||
| 5 | bool dashdee, dashee, dashvee, dashex, dashell, dasheye, | |
| 6 | dashen, dashpee, interactive; | |
| 7 | int rc_pid; | |
| 8 | ||
| 9 | static bool dashoh; | |
| 10 | ||
| 11 | static void assigndefault(char *,...); | |
| 12 | static void checkfd(int, enum redirtype); | |
| 13 | ||
| 14 | extern void main(int argc, char *argv[], char *envp[]) { | |
| 15 | char *dashsee[2], *dollarzero, *null[1]; | |
| 16 | int c; | |
| 17 | initprint(); | |
| 18 | dashsee[0] = dashsee[1] = NULL; | |
| 19 | dollarzero = argv[0]; | |
| 20 | rc_pid = getpid(); | |
| 21 | dashell = (*argv[0] == '-'); /* Unix tradition */ | |
| 22 | while ((c = rc_getopt(argc, argv, "nolpeivdxc:")) != -1) | |
| 23 | switch (c) { | |
| 24 | case 'l': | |
| 25 | dashell = TRUE; | |
| 26 | break; | |
| 27 | case 'e': | |
| 28 | dashee = TRUE; | |
| 29 | break; | |
| 30 | case 'i': | |
| 31 | dasheye = interactive = TRUE; | |
| 32 | break; | |
| 33 | case 'v': | |
| 34 | dashvee = TRUE; | |
| 35 | break; | |
| 36 | case 'x': | |
| 37 | dashex = TRUE; | |
| 38 | break; | |
| 39 | case 'd': | |
| 40 | dashdee = TRUE; | |
| 41 | break; | |
| 42 | case 'c': | |
| 43 | dashsee[0] = rc_optarg; | |
| 44 | goto quitopts; | |
| 45 | case 'n': | |
| 46 | dashen = TRUE; | |
| 47 | break; | |
| 48 | case 'p': | |
| 49 | dashpee = TRUE; | |
| 50 | break; | |
| 51 | case 'o': | |
| 52 | dashoh = TRUE; | |
| 53 | break; | |
| 54 | case '?': | |
| 55 | exit(1); | |
| 56 | } | |
| 57 | quitopts: | |
| 58 | argv += rc_optind; | |
| 59 | /* use isatty() iff -i is not set, and iff the input is not from a script or -c flag */ | |
| 60 | if (!dasheye && dashsee[0] == NULL && *argv == NULL) | |
| 61 | interactive = isatty(0); | |
| 62 | if (!dashoh) { | |
| 63 | checkfd(0, rFrom); | |
| 64 | checkfd(1, rCreate); | |
| 65 | checkfd(2, rCreate); | |
| 66 | } | |
| 67 | initsignal(); | |
| 68 | inithash(); | |
| 69 | initparse(); | |
| 70 | assigndefault("prompt", "; ", "", (void *)0); | |
| 71 | assigndefault("path", DEFAULTPATH, (void *)0); | |
| 72 | assigndefault("ifs", " ", "\t", "\n", (void *)0); | |
| 73 | assigndefault("pid", nprint("%d", rc_pid), (void *)0); | |
| 74 | initenv(envp); | |
| 75 | initinput(); | |
| 76 | null[0] = NULL; | |
| 77 | starassign(dollarzero, null, FALSE); /* assign $0 to $* */ | |
| 78 | inithandler(); | |
| 79 | if (dashsee[0] != NULL) { /* input from the -c flag? */ | |
| 80 | if (*argv != NULL) | |
| 81 | starassign(dollarzero, argv, FALSE); | |
| 82 | pushstring(dashsee, TRUE); | |
| 83 | } else if (*argv != NULL) { /* else from a file? */ | |
| 84 | b_dot(--argv); | |
| 85 | rc_exit(getstatus()); | |
| 86 | } else { /* else stdin */ | |
| 87 | pushfd(0); | |
| 88 | } | |
| 89 | dasheye = FALSE; | |
| 90 | doit(TRUE); | |
| 91 | rc_exit(getstatus()); | |
| 92 | } | |
| 93 | ||
| 94 | static void assigndefault(char *name,...) { | |
| 95 | va_list ap; | |
| 96 | List *l; | |
| 97 | char *v; | |
| 98 | va_start(ap, name); | |
| 99 | for (l = NULL; (v = va_arg(ap, char *)) != NULL;) | |
| 100 | l = append(l, word(v, NULL)); | |
| 101 | varassign(name, l, FALSE); | |
| 102 | if (streq(name, "path")) | |
| 103 | alias(name, l, FALSE); | |
| 104 | va_end(ap); | |
| 105 | } | |
| 106 | ||
| 107 | /* open an fd on /dev/null if it is inherited closed */ | |
| 108 | ||
| 109 | static void checkfd(int fd, enum redirtype r) { | |
| 110 | int new = rc_open("/dev/null", r); | |
| 111 | if (new != fd && new != -1) | |
| 112 | close(new); | |
| 113 | } |