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pascal@13691
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1 #include <asm/limits.h>
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pascal@13691
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2 #include <sys/types.h>
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3 #include <unistd.h>
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4 #include <fcntl.h>
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5 #include <stdio.h>
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6 #include "iso9660.h"
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7 #include "bootlinux.h"
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8 #include "libdos.h"
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9
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10 static void usage(char *iso)
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11 {
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12 printf("Usage: %s [[@commands]|[kernel=<bzimage>] \
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13 [initrd=<rootfs>[,<rootfs2>...]] [iso=<isofile>] ...]\n\n\
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14 Defaults: %s @tazboot.cmd or %s kernel=bzImage auto\n\n\
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15 Examples for tazboot.cmd:\n\n\
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16 iso=\\isos\\slitaz-4.0.iso\n\
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17 kernel=boot/bzImage\n\
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18 initrd=boot/rootfs4.gz,boot/rootfs3.gz,boot/rootfs2.gz,boot/rootfs1.gz,\\slitaz\\extrafs.gz\n\
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19 rw root=/dev/null vga=normal autologin\n\n\
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20 kernel=\\slitaz\\vmlinuz\n\
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21 root=/dev/sda5 ro\n",iso,iso,iso);
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22 exit(1);
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23 }
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24
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25 static void bootiso(char **iso)
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26 {
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27 char *init = "rdinit=/init.exe", *mode="menu";
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28 char c, rootfs[16], cmdline[256];
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29 int restart;
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30 unsigned long magic;
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31
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32 if (isoreset(*iso) || isoopen("boot")) return;
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33 if (iso[1] && !strcmp(mode = iso[1], "text"))
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34 init = "";
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35 for (c = 0, restart = 1; isoreaddir(restart) == 0; restart = 0) {
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36 if (strncmp(isofilename, "rootfs", 6)
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37 || c > isofilename[6]) continue;
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38 strcpy(rootfs, isofilename);
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39 c = isofilename[6];
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40 }
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41 if (isoopen(mode))
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42 isoopen("bzImage");
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pascal@14257
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43 if (loadkernel() < 0x20630)
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44 init = ""; // Does not support multiple initramfs
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45 isoopen(rootfs);
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46 loadinitrd();
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pascal@13972
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47 lseek(isofd, 24, SEEK_SET);
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48 read(isofd, &magic, 4);
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49 isofilesize = magic & 0xFFFF;
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pascal@14264
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50 isofileofs = 0x7EE0 - isofilesize;
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51 loadinitrd();
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52 close(isofd);
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53 sprintf(cmdline,"rw root=/dev/null %s iso=%s magic=%lu mode=%s",
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54 init, *iso, magic, mode);
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55 bootlinux(cmdline);
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56 }
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57
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58 static int stricmp(char *ref, char *s)
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59 {
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60 char c;
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61 while (*ref) {
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62 c = *s++;
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63 if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
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64 c -= *ref++;
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65 if (c) return c;
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66 }
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67 return 0;
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68 }
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69
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70 static char *iso;
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71 static int fakeopen(char *file)
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72 {
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73 if (file) {
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74 char *s = file;
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75 while (*s && *s != '\r' && *s != '\n') s++;
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76 *s = 0;
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77 }
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pascal@16012
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78 if (*file == '\\') {
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79 static fd = -1;
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80 if (fd >= 0) close(fd);
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81 return open(file, O_RDONLY);
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82 }
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83 if (iso) {
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84 isoreset(iso);
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85 return isoopen(file);
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86 }
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87 close(isofd);
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88 isofd = open(file, O_RDONLY);
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89 if (isofd != -1) {
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90 isofileofs = 0;
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91 isofilesize = LONG_MAX;
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92 }
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93 return isofd;
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94 }
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95
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96 static char args[2048];
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97 int main(int argc, char *argv[])
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98 {
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99 char *kernel, *initrd, *cmdline, *cmdfile, *s;
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100
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101 argv[0] = progname();
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pascal@14268
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102 bootiso(argv); // iso ? parsing is /init.exe stuff !
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pascal@14268
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103 if (argc == 2)
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104 bootiso(argv + 1);
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105
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106 chdirname(*argv);
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107 cmdfile = "tazboot.cmd";
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108 kernel = "bzImage";
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109 initrd = NULL;
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110 cmdline = "auto";
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111 if (argc > 1) {
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112 if (argv[1][0] == '@')
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113 cmdfile = argv[1] + 1;
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114 else {
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115 cmdfile = NULL;
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116 #asm
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117 push ds
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118 pop es
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119 mov si, #0x82
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120 mov di, #_args
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121 mov cx, #0x7E/2
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122 rep
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123 seg cs
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124 movsw
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125 #endasm
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126 }
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127 }
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128 if (cmdfile) {
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129 int fd;
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130 fd = open(cmdfile, O_RDONLY);;
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131 if (fd != -1) {
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132 read(fd, args, sizeof(args));
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133 close(fd);
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134 for (s = args; s < args + sizeof(args) -1; s++) {
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135 if (*s == '\r') *s++ = ' ';
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136 if (*s == '\n') *s = ' ';
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137 }
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138 }
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139 }
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140 for (s = args; s < args + sizeof(args); s++) {
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141 if (*s == ' ') continue;
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142 if (stricmp("kernel=", s) == 0)
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143 kernel = s + 7;
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144 else if (stricmp("initrd=", s) == 0)
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145 initrd = s + 7;
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146 else if (stricmp("iso=", s) == 0)
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147 iso = s + 4;
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148 else {
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149 cmdline = s;
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150 break;
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151 }
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pascal@13691
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152 while (*s && *s != ' ') s++;
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153 *s = 0;
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154 }
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pascal@16002
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155 if (cmdline) {
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pascal@16002
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156 char *last;
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pascal@16002
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157 for (s = cmdline; *s && *s != '\r' && *s != '\n'; s++)
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158 if (*s != ' ') last = s;
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159 *++last = 0;
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160 }
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161 if (fakeopen(kernel) == -1)
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162 usage(argv[0]);
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163 loadkernel();
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164 if (initrd) {
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165 char *p, *q = initrd;
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166 while (1) {
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167 char c;
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168 for (p = q; *p && *p != ','; p++);
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169 c = *p;
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170 *p = 0;
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171 if (fakeopen(q) != -1)
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172 loadinitrd();
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173 if (c == 0)
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174 break;
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175 q = ++p;
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176 }
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177 }
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178 bootlinux(cmdline);
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179 }
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