toybox: main.c annotate

annotate main.c @ 20:3981c96f9285

Implement which. Add hello world to menuconfig. Wrap the various applet main functions in main.c with USE() macros so --gc-sections can strip them.

author	Rob Landley <rob@landley.net>
date	Fri, 03 Nov 2006 00:05:52 -0500
parents	d87d8a056295
children	6475d6c46066

rev	line source
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	1 /* vi: set ts=4 :*/
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	2 /* Toybox infrastructure.
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	3 *
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	4 * Copyright 2006 Rob Landley <rob@landley.net>
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	5 *
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	6 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	7 */
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	8
1 59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	9 #include "toys.h"
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	10
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	11 // The monster fun applet list.
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	12
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	13 struct toy_list toy_list[] = {
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	14 // This one is out of order on purpose.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	15 {"toybox", toybox_main, 0},
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	16 // The rest of these are alphabetical, for binary search.
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	17 USE_TOYSH({"cd", cd_main, TOYFLAG_NOFORK},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	18 USE_DF({"df", df_main, TOYFLAG_USR\|TOYFLAG_SBIN},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	19 USE_TOYSH({"exit", exit_main, TOYFLAG_NOFORK},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	20 USE_HELLO({"hello", hello_main, TOYFLAG_NOFORK\|TOYFLAG_USR},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	21 USE_TOYSH({"sh", toysh_main, TOYFLAG_BIN},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	22 USE_TOYSH({"toysh", toysh_main, TOYFLAG_BIN},)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 13 diff changeset	23 USE_WHICH({"which", which_main, TOYFLAG_USR\|TOYFLAG_BIN},)
1 59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	24 };
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	25
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	26 #define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list))
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	27
1 59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	28 // global context for this applet.
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	29
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	30 struct toy_context toys;
59d58fab67c6 Next snapshot. Tries to grab something out of lib in order to build, I have landley@driftwood parents: 0 diff changeset	31
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	32 struct toy_list toy_find(char name)
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	33 {
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	34 int top, bottom, middle;
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	35
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	36 // If the name starts with "toybox", accept that as a match. Otherwise
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	37 // skip the first entry, which is out of order.
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	38
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	39 if (!strncmp(name,"toybox",6)) return toy_list;
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	40 bottom = 1;
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	41
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	42 // Binary search to find this applet.
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	43
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	44 top = TOY_LIST_LEN-1;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	45 for (;;) {
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	46 int result;
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	47
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	48 middle = (top+bottom)/2;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	49 if (middle<bottom \|\| middle>top) return NULL;
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	50 result = strcmp(name,toy_list[middle].name);
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	51 if (!result) return toy_list+middle;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	52 if (result<0) top=--middle;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	53 else bottom = ++middle;
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	54 }
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	55 }
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	56
3 266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	57 void toy_init(struct toy_list which, char argv[])
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	58 {
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	59 // Free old toys contents here?
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	60
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	61 toys.which = which;
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	62 toys.argv = argv;
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	63 toys.exitval = 1;
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	64 }
266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	65
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	66 // Run a toy.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	67 void toy_exec(char *argv[])
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	68 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	69 struct toy_list *which;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	70
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	71 which = toy_find(argv[0]);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	72 if (!which) return;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	73
3 266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	74 toy_init(which, argv);
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	75
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	76 exit(toys.which->toy_main());
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	77 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	78
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	79 int toybox_main(void)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	80 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	81 static char *toy_paths[]={"usr/","bin/","sbin/",0};
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	82 int i, len = 0;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	83
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	84 if (toys.argv[1]) {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	85 if (toys.argv[1][0]!='-') {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	86 toy_exec(toys.argv+1);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	87 error_exit("No behavior for %s\n",toys.argv[1]);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	88 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	89 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	90
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	91 // Output list of applets.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	92 for (i=1; i<TOY_LIST_LEN; i++) {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	93 int fl = toy_list[i].flags;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	94 if (fl & TOYMASK_LOCATION) {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	95 if (toys.argv[1]) {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	96 int j;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	97 for (j=0; toy_paths[j]; j++)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	98 if (fl & (1<<j)) len += printf("%s", toy_paths[j]);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	99 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	100 len += printf("%s ",toy_list[i].name);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	101 if (len>65) {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	102 putchar('\n');
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	103 len=0;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	104 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	105 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	106 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	107 putchar('\n');
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	108 return 0;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	109 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	110
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	111 int main(int argc, char *argv[])
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	112 {
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	113 char *name;
e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	114
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	115 // Figure out which applet to call.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	116 name = rindex(argv[0], '/');
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	117 if (!name) name=argv[0];
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	118 else name++;
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	119 argv[0] = name;
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	120
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	121 toys.argv = argv-1;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: 1 diff changeset	122 return toybox_main();
0 e651a31d5416 Starting a new project. Just a bit past the "hello world" stage... landley@driftwood parents: diff changeset	123 }

Mercurial > hg > toybox

annotate main.c @ 20:3981c96f9285