[2725] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Applet table generator.
|
---|
| 4 | * Runs on host and produces include/applet_tables.h
|
---|
| 5 | *
|
---|
| 6 | * Copyright (C) 2007 Denys Vlasenko <vda.linux@googlemail.com>
|
---|
| 7 | *
|
---|
| 8 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 9 | */
|
---|
[3232] | 10 | #include <sys/types.h>
|
---|
| 11 | #include <sys/stat.h>
|
---|
| 12 | #include <fcntl.h>
|
---|
[2725] | 13 | #include <stdlib.h>
|
---|
| 14 | #include <string.h>
|
---|
| 15 | #include <stdio.h>
|
---|
[3232] | 16 | #include <unistd.h>
|
---|
[2725] | 17 |
|
---|
[3232] | 18 | #undef ARRAY_SIZE
|
---|
| 19 | #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
|
---|
| 20 |
|
---|
[2725] | 21 | #include "../include/autoconf.h"
|
---|
[3232] | 22 | #include "../include/applet_metadata.h"
|
---|
[2725] | 23 |
|
---|
| 24 | struct bb_applet {
|
---|
| 25 | const char *name;
|
---|
| 26 | const char *main;
|
---|
| 27 | enum bb_install_loc_t install_loc;
|
---|
| 28 | enum bb_suid_t need_suid;
|
---|
| 29 | /* true if instead of fork(); exec("applet"); waitpid();
|
---|
| 30 | * one can do fork(); exit(applet_main(argc,argv)); waitpid(); */
|
---|
| 31 | unsigned char noexec;
|
---|
| 32 | /* Even nicer */
|
---|
| 33 | /* true if instead of fork(); exec("applet"); waitpid();
|
---|
| 34 | * one can simply call applet_main(argc,argv); */
|
---|
| 35 | unsigned char nofork;
|
---|
| 36 | };
|
---|
| 37 |
|
---|
| 38 | /* Define struct bb_applet applets[] */
|
---|
| 39 | #include "../include/applets.h"
|
---|
| 40 |
|
---|
| 41 | enum { NUM_APPLETS = ARRAY_SIZE(applets) };
|
---|
| 42 |
|
---|
| 43 | static int offset[NUM_APPLETS];
|
---|
| 44 |
|
---|
| 45 | static int cmp_name(const void *a, const void *b)
|
---|
| 46 | {
|
---|
| 47 | const struct bb_applet *aa = a;
|
---|
| 48 | const struct bb_applet *bb = b;
|
---|
| 49 | return strcmp(aa->name, bb->name);
|
---|
| 50 | }
|
---|
| 51 |
|
---|
| 52 | int main(int argc, char **argv)
|
---|
| 53 | {
|
---|
| 54 | int i;
|
---|
| 55 | int ofs;
|
---|
| 56 | unsigned MAX_APPLET_NAME_LEN = 1;
|
---|
| 57 |
|
---|
| 58 | qsort(applets, NUM_APPLETS, sizeof(applets[0]), cmp_name);
|
---|
| 59 |
|
---|
| 60 | ofs = 0;
|
---|
| 61 | for (i = 0; i < NUM_APPLETS; i++) {
|
---|
| 62 | offset[i] = ofs;
|
---|
| 63 | ofs += strlen(applets[i].name) + 1;
|
---|
| 64 | }
|
---|
| 65 | /* We reuse 4 high-order bits of offset array for other purposes,
|
---|
| 66 | * so if they are indeed needed, refuse to proceed */
|
---|
| 67 | if (ofs > 0xfff)
|
---|
| 68 | return 1;
|
---|
| 69 | if (!argv[1])
|
---|
| 70 | return 1;
|
---|
| 71 |
|
---|
| 72 | i = open(argv[1], O_WRONLY | O_TRUNC | O_CREAT, 0666);
|
---|
| 73 | if (i < 0)
|
---|
| 74 | return 1;
|
---|
| 75 | dup2(i, 1);
|
---|
| 76 |
|
---|
| 77 | /* Keep in sync with include/busybox.h! */
|
---|
| 78 |
|
---|
| 79 | printf("/* This is a generated file, don't edit */\n\n");
|
---|
| 80 |
|
---|
| 81 | printf("#define NUM_APPLETS %u\n", NUM_APPLETS);
|
---|
| 82 | if (NUM_APPLETS == 1) {
|
---|
| 83 | printf("#define SINGLE_APPLET_STR \"%s\"\n", applets[0].name);
|
---|
[3232] | 84 | printf("#define SINGLE_APPLET_MAIN %s_main\n", applets[0].main);
|
---|
[2725] | 85 | }
|
---|
| 86 | printf("\n");
|
---|
| 87 |
|
---|
| 88 | //printf("#ifndef SKIP_definitions\n");
|
---|
| 89 | printf("const char applet_names[] ALIGN1 = \"\"\n");
|
---|
| 90 | for (i = 0; i < NUM_APPLETS; i++) {
|
---|
| 91 | printf("\"%s\" \"\\0\"\n", applets[i].name);
|
---|
| 92 | if (MAX_APPLET_NAME_LEN < strlen(applets[i].name))
|
---|
| 93 | MAX_APPLET_NAME_LEN = strlen(applets[i].name);
|
---|
| 94 | }
|
---|
| 95 | printf(";\n\n");
|
---|
| 96 |
|
---|
| 97 | printf("#ifndef SKIP_applet_main\n");
|
---|
| 98 | printf("int (*const applet_main[])(int argc, char **argv) = {\n");
|
---|
| 99 | for (i = 0; i < NUM_APPLETS; i++) {
|
---|
| 100 | printf("%s_main,\n", applets[i].main);
|
---|
| 101 | }
|
---|
| 102 | printf("};\n");
|
---|
| 103 | printf("#endif\n\n");
|
---|
| 104 |
|
---|
| 105 | printf("const uint16_t applet_nameofs[] ALIGN2 = {\n");
|
---|
| 106 | for (i = 0; i < NUM_APPLETS; i++) {
|
---|
| 107 | printf("0x%04x,\n",
|
---|
| 108 | offset[i]
|
---|
| 109 | #if ENABLE_FEATURE_PREFER_APPLETS
|
---|
| 110 | + (applets[i].nofork << 12)
|
---|
| 111 | + (applets[i].noexec << 13)
|
---|
| 112 | #endif
|
---|
| 113 | #if ENABLE_FEATURE_SUID
|
---|
| 114 | + (applets[i].need_suid << 14) /* 2 bits */
|
---|
| 115 | #endif
|
---|
| 116 | );
|
---|
| 117 | }
|
---|
| 118 | printf("};\n\n");
|
---|
| 119 |
|
---|
| 120 | #if ENABLE_FEATURE_INSTALLER
|
---|
| 121 | printf("const uint8_t applet_install_loc[] ALIGN1 = {\n");
|
---|
| 122 | i = 0;
|
---|
| 123 | while (i < NUM_APPLETS) {
|
---|
| 124 | int v = applets[i].install_loc; /* 3 bits */
|
---|
| 125 | if (++i < NUM_APPLETS)
|
---|
| 126 | v |= applets[i].install_loc << 4; /* 3 bits */
|
---|
| 127 | printf("0x%02x,\n", v);
|
---|
| 128 | i++;
|
---|
| 129 | }
|
---|
| 130 | printf("};\n");
|
---|
| 131 | #endif
|
---|
| 132 | //printf("#endif /* SKIP_definitions */\n");
|
---|
| 133 | printf("\n");
|
---|
| 134 | printf("#define MAX_APPLET_NAME_LEN %u\n", MAX_APPLET_NAME_LEN);
|
---|
| 135 |
|
---|
| 136 | if (argv[2]) {
|
---|
| 137 | char line_old[80];
|
---|
| 138 | char line_new[80];
|
---|
| 139 | FILE *fp;
|
---|
| 140 |
|
---|
| 141 | line_old[0] = 0;
|
---|
| 142 | fp = fopen(argv[2], "r");
|
---|
| 143 | if (fp) {
|
---|
| 144 | fgets(line_old, sizeof(line_old), fp);
|
---|
| 145 | fclose(fp);
|
---|
| 146 | }
|
---|
| 147 | sprintf(line_new, "#define NUM_APPLETS %u\n", NUM_APPLETS);
|
---|
| 148 | if (strcmp(line_old, line_new) != 0) {
|
---|
| 149 | fp = fopen(argv[2], "w");
|
---|
| 150 | if (!fp)
|
---|
| 151 | return 1;
|
---|
| 152 | fputs(line_new, fp);
|
---|
| 153 | }
|
---|
| 154 | }
|
---|
| 155 |
|
---|
| 156 | return 0;
|
---|
| 157 | }
|
---|