1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Utility routines.
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4 | *
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5 | * Copyright (C) tons of folks. Tracking down who wrote what
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6 | * isn't something I'm going to worry about... If you wrote something
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7 | * here, please feel free to acknowledge your work.
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8 | *
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9 | * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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10 | * Permission has been granted to redistribute this code under the GPL.
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11 | *
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12 | * Licensed under GPLv2 or later, see file License in this tarball for details.
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13 | */
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14 |
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15 | #include <assert.h>
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16 | #include "busybox.h"
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17 |
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18 | /* Apparently uclibc defines __GLIBC__ (compat trick?). Oh well. */
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19 | #if ENABLE_STATIC && defined(__GLIBC__) && !defined(__UCLIBC__)
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20 | #warning Static linking against glibc produces buggy executables
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21 | #warning (glibc does not cope well with ld --gc-sections).
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22 | #warning See sources.redhat.com/bugzilla/show_bug.cgi?id=3400
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23 | #warning Note that glibc is unsuitable for static linking anyway.
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24 | #warning If you still want to do it, remove -Wl,--gc-sections
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25 | #warning from top-level Makefile and remove this warning.
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26 | #error Aborting compilation.
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27 | #endif
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28 |
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29 |
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30 | /* Declare <applet>_main() */
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31 | #define PROTOTYPES
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32 | #include "applets.h"
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33 | #undef PROTOTYPES
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34 |
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35 | #if ENABLE_SHOW_USAGE && !ENABLE_FEATURE_COMPRESS_USAGE
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36 | /* Define usage_messages[] */
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37 | static const char usage_messages[] ALIGN1 = ""
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38 | #define MAKE_USAGE
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39 | #include "usage.h"
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40 | #include "applets.h"
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41 | ;
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42 | #undef MAKE_USAGE
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43 | #else
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44 | #define usage_messages 0
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45 | #endif /* SHOW_USAGE */
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46 |
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47 | /* Define struct bb_applet applets[] */
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48 | #include "applets.h"
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49 | /* The -1 arises because of the {0,NULL,0,-1} entry. */
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50 |
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51 | #if ENABLE_FEATURE_SH_STANDALONE
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52 | const unsigned short NUM_APPLETS = ARRAY_SIZE(applets);
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53 | #endif
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54 | const struct bb_applet *current_applet;
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55 | const char *applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
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56 | #if !BB_MMU
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57 | bool re_execed;
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58 | #endif
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59 |
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60 | USE_FEATURE_SUID(static uid_t ruid;) /* real uid */
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61 |
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62 | #if ENABLE_FEATURE_SUID_CONFIG
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63 |
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64 | /* applets[] is const, so we have to define this "override" structure */
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65 | static struct BB_suid_config {
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66 | const struct bb_applet *m_applet;
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67 | uid_t m_uid;
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68 | gid_t m_gid;
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69 | mode_t m_mode;
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70 | struct BB_suid_config *m_next;
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71 | } *suid_config;
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72 |
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73 | static bool suid_cfg_readable;
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74 |
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75 | /* check if u is member of group g */
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76 | static int ingroup(uid_t u, gid_t g)
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77 | {
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78 | struct group *grp = getgrgid(g);
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79 |
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80 | if (grp) {
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81 | char **mem;
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82 |
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83 | for (mem = grp->gr_mem; *mem; mem++) {
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84 | struct passwd *pwd = getpwnam(*mem);
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85 |
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86 | if (pwd && (pwd->pw_uid == u))
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87 | return 1;
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88 | }
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89 | }
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90 | return 0;
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91 | }
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92 |
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93 | /* This should probably be a libbb routine. In that case,
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94 | * I'd probably rename it to something like bb_trimmed_slice.
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95 | */
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96 | static char *get_trimmed_slice(char *s, char *e)
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97 | {
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98 | /* First, consider the value at e to be nul and back up until we
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99 | * reach a non-space char. Set the char after that (possibly at
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100 | * the original e) to nul. */
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101 | while (e-- > s) {
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102 | if (!isspace(*e)) {
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103 | break;
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104 | }
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105 | }
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106 | e[1] = '\0';
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107 |
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108 | /* Next, advance past all leading space and return a ptr to the
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109 | * first non-space char; possibly the terminating nul. */
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110 | return skip_whitespace(s);
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111 | }
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112 |
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113 | /* Don't depend on the tools to combine strings. */
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114 | static const char config_file[] ALIGN1 = "/etc/busybox.conf";
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115 |
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116 | /* We don't supply a value for the nul, so an index adjustment is
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117 | * necessary below. Also, we use unsigned short here to save some
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118 | * space even though these are really mode_t values. */
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119 | static const unsigned short mode_mask[] ALIGN2 = {
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120 | /* SST sst xxx --- */
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121 | S_ISUID, S_ISUID|S_IXUSR, S_IXUSR, 0, /* user */
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122 | S_ISGID, S_ISGID|S_IXGRP, S_IXGRP, 0, /* group */
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123 | 0, S_IXOTH, S_IXOTH, 0 /* other */
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124 | };
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125 |
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126 | #define parse_error(x) do { errmsg = x; goto pe_label; } while (0)
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127 |
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128 | static void parse_config_file(void)
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129 | {
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130 | struct BB_suid_config *sct_head;
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131 | struct BB_suid_config *sct;
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132 | const struct bb_applet *applet;
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133 | FILE *f;
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134 | const char *errmsg;
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135 | char *s;
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136 | char *e;
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137 | int i;
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138 | unsigned lc;
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139 | smallint section;
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140 | char buffer[256];
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141 | struct stat st;
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142 |
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143 | assert(!suid_config); /* Should be set to NULL by bss init. */
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144 |
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145 | ruid = getuid();
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146 | if (ruid == 0) /* run by root - don't need to even read config file */
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147 | return;
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148 |
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149 | if ((stat(config_file, &st) != 0) /* No config file? */
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150 | || !S_ISREG(st.st_mode) /* Not a regular file? */
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151 | || (st.st_uid != 0) /* Not owned by root? */
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152 | || (st.st_mode & (S_IWGRP | S_IWOTH)) /* Writable by non-root? */
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153 | || !(f = fopen(config_file, "r")) /* Cannot open? */
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154 | ) {
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155 | return;
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156 | }
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157 |
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158 | suid_cfg_readable = 1;
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159 | sct_head = NULL;
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160 | section = lc = 0;
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161 |
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162 | while (1) {
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163 | s = buffer;
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164 |
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165 | if (!fgets(s, sizeof(buffer), f)) { /* Are we done? */
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166 | if (ferror(f)) { /* Make sure it wasn't a read error. */
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167 | parse_error("reading");
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168 | }
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169 | fclose(f);
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170 | suid_config = sct_head; /* Success, so set the pointer. */
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171 | return;
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172 | }
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173 |
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174 | lc++; /* Got a (partial) line. */
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175 |
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176 | /* If a line is too long for our buffer, we consider it an error.
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177 | * The following test does mistreat one corner case though.
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178 | * If the final line of the file does not end with a newline and
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179 | * yet exactly fills the buffer, it will be treated as too long
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180 | * even though there isn't really a problem. But it isn't really
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181 | * worth adding code to deal with such an unlikely situation, and
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182 | * we do err on the side of caution. Besides, the line would be
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183 | * too long if it did end with a newline. */
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184 | if (!strchr(s, '\n') && !feof(f)) {
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185 | parse_error("line too long");
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186 | }
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187 |
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188 | /* Trim leading and trailing whitespace, ignoring comments, and
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189 | * check if the resulting string is empty. */
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190 | s = get_trimmed_slice(s, strchrnul(s, '#'));
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191 | if (!*s) {
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192 | continue;
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193 | }
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194 |
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195 | /* Check for a section header. */
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196 |
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197 | if (*s == '[') {
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198 | /* Unlike the old code, we ignore leading and trailing
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199 | * whitespace for the section name. We also require that
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200 | * there are no stray characters after the closing bracket. */
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201 | e = strchr(s, ']');
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202 | if (!e /* Missing right bracket? */
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203 | || e[1] /* Trailing characters? */
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204 | || !*(s = get_trimmed_slice(s+1, e)) /* Missing name? */
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205 | ) {
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206 | parse_error("section header");
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207 | }
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208 | /* Right now we only have one section so just check it.
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209 | * If more sections are added in the future, please don't
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210 | * resort to cascading ifs with multiple strcasecmp calls.
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211 | * That kind of bloated code is all too common. A loop
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212 | * and a string table would be a better choice unless the
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213 | * number of sections is very small. */
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214 | if (strcasecmp(s, "SUID") == 0) {
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215 | section = 1;
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216 | continue;
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217 | }
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218 | section = -1; /* Unknown section so set to skip. */
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219 | continue;
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220 | }
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221 |
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222 | /* Process sections. */
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223 |
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224 | if (section == 1) { /* SUID */
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225 | /* Since we trimmed leading and trailing space above, we're
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226 | * now looking for strings of the form
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227 | * <key>[::space::]*=[::space::]*<value>
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228 | * where both key and value could contain inner whitespace. */
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229 |
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230 | /* First get the key (an applet name in our case). */
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231 | e = strchr(s, '=');
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232 | if (e) {
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233 | s = get_trimmed_slice(s, e);
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234 | }
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235 | if (!e || !*s) { /* Missing '=' or empty key. */
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236 | parse_error("keyword");
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237 | }
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238 |
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239 | /* Ok, we have an applet name. Process the rhs if this
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240 | * applet is currently built in and ignore it otherwise.
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241 | * Note: this can hide config file bugs which only pop
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242 | * up when the busybox configuration is changed. */
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243 | applet = find_applet_by_name(s);
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244 | if (applet) {
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245 | /* Note: We currently don't check for duplicates!
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246 | * The last config line for each applet will be the
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247 | * one used since we insert at the head of the list.
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248 | * I suppose this could be considered a feature. */
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249 | sct = xmalloc(sizeof(struct BB_suid_config));
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250 | sct->m_applet = applet;
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251 | sct->m_mode = 0;
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252 | sct->m_next = sct_head;
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253 | sct_head = sct;
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254 |
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255 | /* Get the specified mode. */
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256 |
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257 | e = skip_whitespace(e+1);
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258 |
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259 | for (i = 0; i < 3; i++) {
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260 | /* There are 4 chars + 1 nul for each of user/group/other. */
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261 | static const char mode_chars[] ALIGN1 = "Ssx-\0" "Ssx-\0" "Ttx-";
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262 |
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263 | const char *q;
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264 | q = strchrnul(mode_chars + 5*i, *e++);
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265 | if (!*q) {
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266 | parse_error("mode");
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267 | }
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268 | /* Adjust by -i to account for nul. */
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269 | sct->m_mode |= mode_mask[(q - mode_chars) - i];
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270 | }
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271 |
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272 | /* Now get the the user/group info. */
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273 |
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274 | s = skip_whitespace(e);
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275 |
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276 | /* Note: we require whitespace between the mode and the
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277 | * user/group info. */
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278 | if ((s == e) || !(e = strchr(s, '.'))) {
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279 | parse_error("<uid>.<gid>");
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280 | }
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281 | *e++ = '\0';
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282 |
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283 | /* We can't use get_ug_id here since it would exit()
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284 | * if a uid or gid was not found. Oh well... */
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285 | sct->m_uid = bb_strtoul(s, NULL, 10);
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286 | if (errno) {
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287 | struct passwd *pwd = getpwnam(s);
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288 | if (!pwd) {
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289 | parse_error("user");
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290 | }
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291 | sct->m_uid = pwd->pw_uid;
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292 | }
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293 |
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294 | sct->m_gid = bb_strtoul(e, NULL, 10);
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295 | if (errno) {
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296 | struct group *grp;
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297 | grp = getgrnam(e);
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298 | if (!grp) {
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299 | parse_error("group");
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300 | }
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301 | sct->m_gid = grp->gr_gid;
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302 | }
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303 | }
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304 | continue;
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305 | }
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306 |
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307 | /* Unknown sections are ignored. */
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308 |
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309 | /* Encountering configuration lines prior to seeing a
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310 | * section header is treated as an error. This is how
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311 | * the old code worked, but it may not be desirable.
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312 | * We may want to simply ignore such lines in case they
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313 | * are used in some future version of busybox. */
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314 | if (!section) {
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315 | parse_error("keyword outside section");
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316 | }
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317 |
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318 | } /* while (1) */
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319 |
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320 | pe_label:
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321 | fprintf(stderr, "Parse error in %s, line %d: %s\n",
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322 | config_file, lc, errmsg);
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323 |
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324 | fclose(f);
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325 | /* Release any allocated memory before returning. */
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326 | while (sct_head) {
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327 | sct = sct_head->m_next;
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328 | free(sct_head);
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329 | sct_head = sct;
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330 | }
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331 | }
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332 | #else
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333 | static inline void parse_config_file(void)
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334 | {
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335 | USE_FEATURE_SUID(ruid = getuid();)
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336 | }
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337 | #endif /* FEATURE_SUID_CONFIG */
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338 |
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339 |
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340 | #if ENABLE_FEATURE_SUID
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341 | static void check_suid(const struct bb_applet *applet)
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342 | {
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343 | gid_t rgid; /* real gid */
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344 |
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345 | if (ruid == 0) /* set by parse_config_file() */
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346 | return; /* run by root - no need to check more */
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347 | rgid = getgid();
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348 |
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349 | #if ENABLE_FEATURE_SUID_CONFIG
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350 | if (suid_cfg_readable) {
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351 | uid_t uid;
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352 | struct BB_suid_config *sct;
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353 | mode_t m;
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354 |
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355 | for (sct = suid_config; sct; sct = sct->m_next) {
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356 | if (sct->m_applet == applet)
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357 | goto found;
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358 | }
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359 | /* default: drop all privileges */
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360 | xsetgid(rgid);
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361 | xsetuid(ruid);
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362 | return;
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363 | found:
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364 | m = sct->m_mode;
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365 | if (sct->m_uid == ruid)
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366 | /* same uid */
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367 | m >>= 6;
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368 | else if ((sct->m_gid == rgid) || ingroup(ruid, sct->m_gid))
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369 | /* same group / in group */
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370 | m >>= 3;
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371 |
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372 | if (!(m & S_IXOTH)) /* is x bit not set ? */
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373 | bb_error_msg_and_die("you have no permission to run this applet!");
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374 |
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375 | /* _both_ sgid and group_exec have to be set for setegid */
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376 | if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP))
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377 | rgid = sct->m_gid;
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378 | /* else (no setegid) we will set egid = rgid */
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379 |
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380 | /* We set effective AND saved ids. If saved-id is not set
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381 | * like we do below, seteiud(0) can still later succeed! */
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382 | if (setresgid(-1, rgid, rgid))
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383 | bb_perror_msg_and_die("setresgid");
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384 |
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385 | /* do we have to set effective uid? */
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386 | uid = ruid;
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387 | if (sct->m_mode & S_ISUID)
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388 | uid = sct->m_uid;
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389 | /* else (no seteuid) we will set euid = ruid */
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390 |
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391 | if (setresuid(-1, uid, uid))
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392 | bb_perror_msg_and_die("setresuid");
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393 | return;
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394 | }
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395 | #if !ENABLE_FEATURE_SUID_CONFIG_QUIET
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396 | {
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397 | static bool onetime = 0;
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398 |
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399 | if (!onetime) {
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400 | onetime = 1;
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401 | fprintf(stderr, "Using fallback suid method\n");
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402 | }
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403 | }
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404 | #endif
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405 | #endif
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406 |
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407 | if (applet->need_suid == _BB_SUID_ALWAYS) {
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408 | /* Real uid is not 0. If euid isn't 0 too, suid bit
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409 | * is most probably not set on our executable */
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410 | if (geteuid())
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411 | bb_error_msg_and_die("applet requires root privileges!");
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412 | } else if (applet->need_suid == _BB_SUID_NEVER) {
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413 | xsetgid(rgid); /* drop all privileges */
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414 | xsetuid(ruid);
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415 | }
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416 | }
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417 | #else
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418 | #define check_suid(x) ((void)0)
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419 | #endif /* FEATURE_SUID */
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420 |
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421 |
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422 | #if ENABLE_FEATURE_COMPRESS_USAGE
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423 |
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424 | #include "usage_compressed.h"
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425 | #include "unarchive.h"
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426 |
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427 | static const char *unpack_usage_messages(void)
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428 | {
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429 | char *outbuf = NULL;
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430 | bunzip_data *bd;
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431 | int i;
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432 |
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433 | i = start_bunzip(&bd,
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434 | /* src_fd: */ -1,
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435 | /* inbuf: */ packed_usage,
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436 | /* len: */ sizeof(packed_usage));
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437 | /* read_bunzip can longjmp to start_bunzip, and ultimately
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438 | * end up here with i != 0 on read data errors! Not trivial */
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439 | if (!i) {
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440 | /* Cannot use xmalloc: will leak bd in NOFORK case! */
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441 | outbuf = malloc_or_warn(SIZEOF_usage_messages);
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442 | if (outbuf)
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443 | read_bunzip(bd, outbuf, SIZEOF_usage_messages);
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444 | }
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445 | dealloc_bunzip(bd);
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446 | return outbuf;
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447 | }
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448 | #define dealloc_usage_messages(s) free(s)
|
---|
449 |
|
---|
450 | #else
|
---|
451 |
|
---|
452 | #define unpack_usage_messages() usage_messages
|
---|
453 | #define dealloc_usage_messages(s) ((void)(s))
|
---|
454 |
|
---|
455 | #endif /* FEATURE_COMPRESS_USAGE */
|
---|
456 |
|
---|
457 |
|
---|
458 | void bb_show_usage(void)
|
---|
459 | {
|
---|
460 | if (ENABLE_SHOW_USAGE) {
|
---|
461 | const char *format_string;
|
---|
462 | const char *p;
|
---|
463 | const char *usage_string = p = unpack_usage_messages();
|
---|
464 | int i;
|
---|
465 |
|
---|
466 | i = current_applet - applets;
|
---|
467 | while (i) {
|
---|
468 | while (*p++) continue;
|
---|
469 | i--;
|
---|
470 | }
|
---|
471 |
|
---|
472 | fprintf(stderr, "%s multi-call binary\n", bb_banner);
|
---|
473 | format_string = "\nUsage: %s %s\n\n";
|
---|
474 | if (*p == '\b')
|
---|
475 | format_string = "\nNo help available.\n\n";
|
---|
476 | fprintf(stderr, format_string, applet_name, p);
|
---|
477 | dealloc_usage_messages((char*)usage_string);
|
---|
478 | }
|
---|
479 | xfunc_die();
|
---|
480 | }
|
---|
481 |
|
---|
482 |
|
---|
483 | static int applet_name_compare(const void *name, const void *vapplet)
|
---|
484 | {
|
---|
485 | const struct bb_applet *applet = vapplet;
|
---|
486 |
|
---|
487 | return strcmp(name, applet->name);
|
---|
488 | }
|
---|
489 |
|
---|
490 | const struct bb_applet *find_applet_by_name(const char *name)
|
---|
491 | {
|
---|
492 | /* Do a binary search to find the applet entry given the name. */
|
---|
493 | return bsearch(name, applets, ARRAY_SIZE(applets)-1, sizeof(applets[0]),
|
---|
494 | applet_name_compare);
|
---|
495 | }
|
---|
496 |
|
---|
497 |
|
---|
498 | #if ENABLE_FEATURE_INSTALLER
|
---|
499 | /* create (sym)links for each applet */
|
---|
500 | static void install_links(const char *busybox, int use_symbolic_links)
|
---|
501 | {
|
---|
502 | /* directory table
|
---|
503 | * this should be consistent w/ the enum,
|
---|
504 | * busybox.h::bb_install_loc_t, or else... */
|
---|
505 | static const char usr_bin [] ALIGN1 = "/usr/bin";
|
---|
506 | static const char usr_sbin[] ALIGN1 = "/usr/sbin";
|
---|
507 | static const char *const install_dir[] = {
|
---|
508 | &usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
|
---|
509 | &usr_bin [4], /* "/bin" */
|
---|
510 | &usr_sbin[4], /* "/sbin" */
|
---|
511 | usr_bin,
|
---|
512 | usr_sbin
|
---|
513 | };
|
---|
514 |
|
---|
515 | int (*lf)(const char *, const char *) = link;
|
---|
516 | char *fpc;
|
---|
517 | int i;
|
---|
518 | int rc;
|
---|
519 |
|
---|
520 | if (use_symbolic_links)
|
---|
521 | lf = symlink;
|
---|
522 |
|
---|
523 | for (i = 0; applets[i].name != NULL; i++) {
|
---|
524 | fpc = concat_path_file(
|
---|
525 | install_dir[applets[i].install_loc],
|
---|
526 | applets[i].name);
|
---|
527 | rc = lf(busybox, fpc);
|
---|
528 | if (rc != 0 && errno != EEXIST) {
|
---|
529 | bb_perror_msg("%s", fpc);
|
---|
530 | }
|
---|
531 | free(fpc);
|
---|
532 | }
|
---|
533 | }
|
---|
534 | #else
|
---|
535 | #define install_links(x,y) ((void)0)
|
---|
536 | #endif /* FEATURE_INSTALLER */
|
---|
537 |
|
---|
538 |
|
---|
539 | /* If we were called as "busybox..." */
|
---|
540 | static int busybox_main(char **argv)
|
---|
541 | {
|
---|
542 | if (!argv[1]) {
|
---|
543 | /* Called without arguments */
|
---|
544 | const struct bb_applet *a;
|
---|
545 | int col, output_width;
|
---|
546 | help:
|
---|
547 | output_width = 80;
|
---|
548 | if (ENABLE_FEATURE_AUTOWIDTH) {
|
---|
549 | /* Obtain the terminal width */
|
---|
550 | get_terminal_width_height(0, &output_width, NULL);
|
---|
551 | }
|
---|
552 | /* leading tab and room to wrap */
|
---|
553 | output_width -= sizeof("start-stop-daemon, ") + 8;
|
---|
554 |
|
---|
555 | printf("%s multi-call binary\n", bb_banner); /* reuse const string... */
|
---|
556 | printf("Copyright (C) 1998-2006 Erik Andersen, Rob Landley, and others.\n"
|
---|
557 | "Licensed under GPLv2. See source distribution for full notice.\n"
|
---|
558 | "\n"
|
---|
559 | "Usage: busybox [function] [arguments]...\n"
|
---|
560 | " or: [function] [arguments]...\n"
|
---|
561 | "\n"
|
---|
562 | "\tBusyBox is a multi-call binary that combines many common Unix\n"
|
---|
563 | "\tutilities into a single executable. Most people will create a\n"
|
---|
564 | "\tlink to busybox for each function they wish to use and BusyBox\n"
|
---|
565 | "\twill act like whatever it was invoked as!\n"
|
---|
566 | "\nCurrently defined functions:\n");
|
---|
567 | col = 0;
|
---|
568 | a = applets;
|
---|
569 | while (a->name) {
|
---|
570 | if (col > output_width) {
|
---|
571 | puts(",");
|
---|
572 | col = 0;
|
---|
573 | }
|
---|
574 | col += printf("%s%s", (col ? ", " : "\t"), a->name);
|
---|
575 | a++;
|
---|
576 | }
|
---|
577 | puts("\n");
|
---|
578 | return 0;
|
---|
579 | }
|
---|
580 |
|
---|
581 | if (ENABLE_FEATURE_INSTALLER && strcmp(argv[1], "--install") == 0) {
|
---|
582 | const char *busybox;
|
---|
583 | busybox = xmalloc_readlink(bb_busybox_exec_path);
|
---|
584 | if (!busybox)
|
---|
585 | busybox = bb_busybox_exec_path;
|
---|
586 | /* -s makes symlinks */
|
---|
587 | install_links(busybox, argv[2] && strcmp(argv[2], "-s") == 0);
|
---|
588 | return 0;
|
---|
589 | }
|
---|
590 |
|
---|
591 | if (strcmp(argv[1], "--help") == 0) {
|
---|
592 | /* "busybox --help [<applet>]" */
|
---|
593 | if (!argv[2])
|
---|
594 | goto help;
|
---|
595 | /* convert to "<applet> --help" */
|
---|
596 | argv[0] = argv[2];
|
---|
597 | argv[2] = NULL;
|
---|
598 | } else {
|
---|
599 | /* "busybox <applet> arg1 arg2 ..." */
|
---|
600 | argv++;
|
---|
601 | }
|
---|
602 | /* we want "<argv[0]>: applet not found", not "busybox: ..." */
|
---|
603 | applet_name = argv[0];
|
---|
604 | run_applet_and_exit(argv[0], argv);
|
---|
605 | bb_error_msg_and_die("applet not found");
|
---|
606 | }
|
---|
607 |
|
---|
608 | void run_current_applet_and_exit(char **argv)
|
---|
609 | {
|
---|
610 | int argc = 1;
|
---|
611 |
|
---|
612 | while (argv[argc])
|
---|
613 | argc++;
|
---|
614 |
|
---|
615 | /* Reinit some shared global data */
|
---|
616 | optind = 1;
|
---|
617 | xfunc_error_retval = EXIT_FAILURE;
|
---|
618 |
|
---|
619 | applet_name = current_applet->name;
|
---|
620 | if (argc == 2 && !strcmp(argv[1], "--help"))
|
---|
621 | bb_show_usage();
|
---|
622 | if (ENABLE_FEATURE_SUID)
|
---|
623 | check_suid(current_applet);
|
---|
624 | exit(current_applet->main(argc, argv));
|
---|
625 | }
|
---|
626 |
|
---|
627 | void run_applet_and_exit(const char *name, char **argv)
|
---|
628 | {
|
---|
629 | current_applet = find_applet_by_name(name);
|
---|
630 | if (current_applet)
|
---|
631 | run_current_applet_and_exit(argv);
|
---|
632 | if (!strncmp(name, "busybox", 7))
|
---|
633 | exit(busybox_main(argv));
|
---|
634 | }
|
---|
635 |
|
---|
636 |
|
---|
637 | #ifdef __GLIBC__
|
---|
638 | /* Make it reside in R/W memory: */
|
---|
639 | int *const bb_errno __attribute__ ((section (".data")));
|
---|
640 | #endif
|
---|
641 |
|
---|
642 | int main(int argc, char **argv)
|
---|
643 | {
|
---|
644 | #ifdef __GLIBC__
|
---|
645 | (*(int **)&bb_errno) = __errno_location();
|
---|
646 | #endif
|
---|
647 |
|
---|
648 | #if !BB_MMU
|
---|
649 | /* NOMMU re-exec trick sets high-order bit in first byte of name */
|
---|
650 | if (argv[0][0] & 0x80) {
|
---|
651 | re_execed = 1;
|
---|
652 | argv[0][0] &= 0x7f;
|
---|
653 | }
|
---|
654 | #endif
|
---|
655 | applet_name = argv[0];
|
---|
656 | if (applet_name[0] == '-')
|
---|
657 | applet_name++;
|
---|
658 | applet_name = bb_basename(applet_name);
|
---|
659 |
|
---|
660 | parse_config_file(); /* ...maybe, if FEATURE_SUID_CONFIG */
|
---|
661 |
|
---|
662 | /* Set locale for everybody except 'init' */
|
---|
663 | if (ENABLE_LOCALE_SUPPORT && getpid() != 1)
|
---|
664 | setlocale(LC_ALL, "");
|
---|
665 |
|
---|
666 | run_applet_and_exit(applet_name, argv);
|
---|
667 | bb_error_msg_and_die("applet not found");
|
---|
668 | }
|
---|