1 /* vi: set sw=4 ts=4: */
3 * Applet table generator.
4 * Runs on host and produces include/applet_tables.h
6 * Copyright (C) 2007 Denys Vlasenko <vda.linux@googlemail.com>
8 * Licensed under GPLv2, see file LICENSE in this source tree.
10 #include <sys/types.h>
20 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
22 #include "../include/autoconf.h"
23 #include "../include/applet_metadata.h"
28 enum bb_install_loc_t install_loc;
29 enum bb_suid_t need_suid;
30 /* true if instead of fork(); exec("applet"); waitpid();
31 * one can do fork(); exit(applet_main(argc,argv)); waitpid(); */
34 /* true if instead of fork(); exec("applet"); waitpid();
35 * one can simply call applet_main(argc,argv); */
39 /* Define struct bb_applet applets[] */
40 #include "../include/applets.h"
42 enum { NUM_APPLETS = ARRAY_SIZE(applets) };
44 static int cmp_name(const void *a, const void *b)
46 const struct bb_applet *aa = a;
47 const struct bb_applet *bb = b;
48 return strcmp(aa->name, bb->name);
51 static int str_isalnum_(const char *s)
54 if (!isalnum(*s) && *s != '_')
61 int main(int argc, char **argv)
65 // In find_applet_by_name(), before linear search, narrow it down
66 // by looking at N "equidistant" names. With ~350 applets:
67 // KNOWN_APPNAME_OFFSETS cycles
69 // 2 4604 + ~100 bytes of code
74 // With 8, int16_t applet_nameofs[] table has 7 elements.
75 int KNOWN_APPNAME_OFFSETS = 8;
76 // With 128 applets we do two linear searches, with 1..7 strcmp's in the first one
77 // and 1..16 strcmp's in the second. With 256 apps, second search does 1..32 strcmp's.
78 if (NUM_APPLETS < 128)
79 KNOWN_APPNAME_OFFSETS = 4;
81 KNOWN_APPNAME_OFFSETS = 0;
83 qsort(applets, NUM_APPLETS, sizeof(applets[0]), cmp_name);
87 i = open(argv[1], O_WRONLY | O_TRUNC | O_CREAT, 0666);
92 /* Keep in sync with include/busybox.h! */
94 printf("/* This is a generated file, don't edit */\n\n");
96 printf("#define NUM_APPLETS %u\n", NUM_APPLETS);
97 if (NUM_APPLETS == 1) {
98 printf("#define SINGLE_APPLET_STR \"%s\"\n", applets[0].name);
99 printf("#define SINGLE_APPLET_MAIN %s_main\n", applets[0].main);
102 printf("#define KNOWN_APPNAME_OFFSETS %u\n\n", KNOWN_APPNAME_OFFSETS);
103 if (KNOWN_APPNAME_OFFSETS > 0) {
104 int ofs, offset[KNOWN_APPNAME_OFFSETS], index[KNOWN_APPNAME_OFFSETS];
105 for (i = 0; i < KNOWN_APPNAME_OFFSETS; i++)
106 index[i] = i * NUM_APPLETS / KNOWN_APPNAME_OFFSETS;
108 for (i = 0; i < NUM_APPLETS; i++) {
109 for (j = 0; j < KNOWN_APPNAME_OFFSETS; j++)
112 ofs += strlen(applets[i].name) + 1;
114 /* If the list of names is too long refuse to proceed */
117 printf("const uint16_t applet_nameofs[] ALIGN2 = {\n");
118 for (i = 1; i < KNOWN_APPNAME_OFFSETS; i++)
119 printf("%d,\n", offset[i]);
123 //printf("#ifndef SKIP_definitions\n");
124 printf("const char applet_names[] ALIGN1 = \"\"\n");
125 for (i = 0; i < NUM_APPLETS; i++) {
126 printf("\"%s\" \"\\0\"\n", applets[i].name);
127 // if (MAX_APPLET_NAME_LEN < strlen(applets[i].name))
128 // MAX_APPLET_NAME_LEN = strlen(applets[i].name);
132 for (i = 0; i < NUM_APPLETS; i++) {
133 if (str_isalnum_(applets[i].name))
134 printf("#define APPLET_NO_%s %d\n", applets[i].name, i);
138 printf("#ifndef SKIP_applet_main\n");
139 printf("int (*const applet_main[])(int argc, char **argv) = {\n");
140 for (i = 0; i < NUM_APPLETS; i++) {
141 printf("%s_main,\n", applets[i].main);
144 printf("#endif\n\n");
146 #if ENABLE_FEATURE_PREFER_APPLETS \
147 || ENABLE_FEATURE_SH_STANDALONE \
148 || ENABLE_FEATURE_SH_NOFORK
149 printf("const uint8_t applet_flags[] ALIGN1 = {\n");
151 while (i < NUM_APPLETS) {
152 int v = applets[i].nofork + (applets[i].noexec << 1);
153 if (++i < NUM_APPLETS)
154 v |= (applets[i].nofork + (applets[i].noexec << 1)) << 2;
155 if (++i < NUM_APPLETS)
156 v |= (applets[i].nofork + (applets[i].noexec << 1)) << 4;
157 if (++i < NUM_APPLETS)
158 v |= (applets[i].nofork + (applets[i].noexec << 1)) << 6;
159 printf("0x%02x,\n", v);
165 #if ENABLE_FEATURE_SUID
166 printf("const uint8_t applet_suid[] ALIGN1 = {\n");
168 while (i < NUM_APPLETS) {
169 int v = applets[i].need_suid; /* 2 bits */
170 if (++i < NUM_APPLETS)
171 v |= applets[i].need_suid << 2;
172 if (++i < NUM_APPLETS)
173 v |= applets[i].need_suid << 4;
174 if (++i < NUM_APPLETS)
175 v |= applets[i].need_suid << 6;
176 printf("0x%02x,\n", v);
182 #if ENABLE_FEATURE_INSTALLER
183 printf("const uint8_t applet_install_loc[] ALIGN1 = {\n");
185 while (i < NUM_APPLETS) {
186 int v = applets[i].install_loc; /* 3 bits */
187 if (++i < NUM_APPLETS)
188 v |= applets[i].install_loc << 4; /* 3 bits */
189 printf("0x%02x,\n", v);
194 //printf("#endif /* SKIP_definitions */\n");
197 // printf("#define MAX_APPLET_NAME_LEN %u\n", MAX_APPLET_NAME_LEN);
202 // char line_old[80];
204 sprintf(line_new, "#define NUM_APPLETS %u\n", NUM_APPLETS);
206 // fp = fopen(argv[2], "r");
208 // fgets(line_old, sizeof(line_old), fp);
211 // if (strcmp(line_old, line_new) != 0) {
212 fp = fopen(argv[2], "w");