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pascal@19515
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1 // This file is distributed under GPL
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pascal@19515
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2 //
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pascal@19515
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3 // TAZBOOT main() lives here
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pascal@19515
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4
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pascal@19515
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5 #include "crtl.h"
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pascal@19515
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6 #include "crtlx.h"
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pascal@19515
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7 #include "common.h"
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pascal@19515
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8 #include "iso9660.h"
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pascal@19515
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9
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pascal@19825
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10 struct initrd_info {
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pascal@19825
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11 u32 ofs;
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pascal@19825
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12 u32 size;
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pascal@19825
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13 };
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pascal@19515
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14 #define MAXINITRD 10
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pascal@19515
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15 static struct initrd_state {
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pascal@19825
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16 struct initrd_info info[MAXINITRD];
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pascal@19515
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17 u16 cnt;
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pascal@19515
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18 } initrd_state;
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pascal@19515
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19
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pascal@19515
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20 static void next_chunk(struct image_himem *m)
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pascal@19515
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21 {
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pascal@19825
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22 struct initrd_info *i = &initrd_state.info[m->state];
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pascal@19515
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23 m->chunk_size = 0;
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pascal@19825
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24 if (m->state >= initrd_state.cnt) return;
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pascal@19825
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25 lseekset(m->fd,i->ofs);
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pascal@19825
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26 m->chunk_size = i->size;
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pascal@19515
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27 m->state++;
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pascal@19515
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28 }
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pascal@19515
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29
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pascal@19538
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30 static u32 isofilesize4round()
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pascal@19538
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31 {
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pascal@19538
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32 return (isofilesize+3)&-4;
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pascal@19538
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33 }
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pascal@19538
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34
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pascal@19515
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35 static void addinitrd()
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pascal@19515
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36 {
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pascal@19825
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37 u16 *pcnt = &initrd_state.cnt;
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pascal@19825
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38 struct initrd_info *i = &initrd_state.info[*pcnt];
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pascal@19825
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39 if (*pcnt >= MAXINITRD) return;
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pascal@19825
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40 ++*pcnt;
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pascal@19825
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41 i->size = isofilesize;
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pascal@19825
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42 i->ofs = isofileofs;
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pascal@19538
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43 initrd.size += isofilesize4round();
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pascal@19515
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44 }
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pascal@19515
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45
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pascal@19515
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46 static void load_initrds()
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pascal@19515
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47 {
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pascal@19538
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48 struct image_himem *m = &initrd;
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pascal@19538
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49 if (!m->size) return;
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pascal@19538
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50 m->next_chunk = next_chunk;
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pascal@19538
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51 m->fd = isofd;
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pascal@19538
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52 m->state = 0;
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pascal@19538
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53 next_chunk(m);
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pascal@19515
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54 load_initrd();
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pascal@19515
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55 }
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pascal@19515
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56
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pascal@19538
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57 static char *isokernel()
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pascal@19515
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58 {
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pascal@19538
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59 struct image_himem *m = ±
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pascal@19538
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60 m->chunk_size = m->size = isofilesize4round();
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pascal@19538
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61 m->fd = isofd;
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pascal@19538
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62 return load_kernel();
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pascal@19515
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63 }
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pascal@19515
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64
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pascal@19825
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65 char _cmdline[4096];
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pascal@19825
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66 const char *cmdline = (const char *) _cmdline+1;
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pascal@19515
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67 static void bootiso(char **iso)
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pascal@19515
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68 {
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pascal@19825
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69 const char *init = " rdinit=/init.exe", *mode="menu";
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pascal@19825
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70 char c;
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pascal@19825
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71 static char rootfs[16], fallback[16], isknoppix, noauto;
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pascal@19825
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72 int restart;
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pascal@19515
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73 unsigned long magic;
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pascal@19571
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74 struct isostate *x=&isostate;
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pascal@19515
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75
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pascal@19515
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76 if (!*iso || isoreset(*iso) < 0) return;
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pascal@19580
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77 skip_alloc++;
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pascal@19580
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78 base_himem = memtop() /2;
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pascal@19580
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79 if (base_himem > _64m) base_himem = _64m;
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pascal@19515
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80 isoopen("boot") >= 0 ||
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pascal@19515
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81 isoopen("live") >= 0 || // debian
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pascal@19515
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82 isoopen("casper") >= 0; // ubuntu
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pascal@19515
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83 if (iso[1] && !strcmp(mode = iso[1], "text"))
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pascal@19515
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84 init = "";
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pascal@19515
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85 do {
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pascal@19825
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86 if ((isoopen(mode) >= 0 && ++noauto) || // custom
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pascal@19825
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87 isoopen("bzImage") >= 0 || // SliTaz
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pascal@19825
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88 isoopen("vmlinuz") >= 0 || // misc
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pascal@19515
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89 (isoopen("linux") >= 0 && ++isknoppix)) {
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pascal@19538
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90 magic = kver2ul(isokernel());
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pascal@19515
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91 break;
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pascal@19515
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92 }
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pascal@19515
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93 } while (isoopen("isolinux") >= 0); // Knoppix
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pascal@19515
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94 for (c = 0, restart = 1; isoreaddir(restart) == 0; restart = 0) {
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pascal@19571
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95 if (strstr(x->filename, ".gz"))
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pascal@19571
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96 strcpy(fallback, x->filename);
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pascal@19571
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97 if (strhead(x->filename, "rootfs")
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pascal@19571
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98 || c > x->filename[6]) continue;
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pascal@19571
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99 strcpy(rootfs, x->filename);
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pascal@19571
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100 c = x->filename[6];
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pascal@19515
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101 }
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pascal@19515
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102
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pascal@19825
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103 strcatb(_cmdline,"rw root=/dev/null autologin bootfrom=");
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pascal@19515
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104 strcat(_cmdline,*iso);
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pascal@19515
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105 if (magic < 0x20630)
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pascal@19515
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106 init = ""; // Does not support multiple initramfs
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pascal@19515
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107
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pascal@19825
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108 if (noauto) {
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pascal@19825
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109 char *s;
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pascal@19825
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110 * (int *) _cmdline = 0;
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pascal@19825
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111 iso++;
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pascal@19825
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112 while ((s = *++iso) != NULL) {
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pascal@19825
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113 if (strhead(s,"initrd="))
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pascal@19825
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114 strcatb(_cmdline,s);
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pascal@19825
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115 else if (isoopen(s+7) >= 0)
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pascal@19825
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116 addinitrd();
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pascal@19825
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117 }
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pascal@19825
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118 }
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pascal@19825
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119 else if (magic > 0) {
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pascal@19515
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120 char *initrd = fallback;
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pascal@19872
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121 static const unsigned long initrddesc = 18L;
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pascal@19515
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122
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pascal@19515
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123 if (rootfs[0]) {
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pascal@19515
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124 initrd = rootfs;
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pascal@19515
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125 if (rootfs[6] != '.' && isoopen("rootfs.gz") >= 0)
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pascal@19515
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126 addinitrd(); // for loram
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pascal@19515
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127 }
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pascal@19515
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128 if (isoopen(initrd) >= 0) {
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pascal@19515
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129 addinitrd();
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pascal@19515
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130 }
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pascal@19825
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131 if (*init && isolseek(&initrddesc) != -1) {
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pascal@19872
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132 read(x->fd, &x->filemod, 10); // + x->fileofs & x->filesize
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pascal@19872
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133 magic = x->filemod;
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pascal@19571
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134 x->fileofs &= 0xFFFFL;
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pascal@19825
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135 x->fileofs -= 0xC0L + (x->filesize &= 0xFFFF);
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pascal@19825
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136 if (((short *) &x->fileofs)[1] == 0) addinitrd();
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pascal@19515
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137 else init="";
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pascal@19515
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138 }
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pascal@19515
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139 strcat(_cmdline,init);
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pascal@19538
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140 strcatb(_cmdline,"mode=");
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pascal@19515
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141 strcat(_cmdline,mode);
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pascal@19538
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142 strcatb(_cmdline,"magic=");
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pascal@19515
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143 strcat(_cmdline,ultoa(magic));
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pascal@19515
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144 }
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pascal@19825
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145 load_initrds();
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pascal@19515
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146 if (isknoppix) {
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pascal@19825
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147 char *s = *iso;
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pascal@19825
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148 if (s[1] == ':')
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pascal@19825
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149 s += 2;
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pascal@19825
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150 for (; *s; s++)
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pascal@19515
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151 if (*s == '\\') *s = '/';
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pascal@19515
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152 }
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pascal@19571
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153 close(x->fd);
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pascal@19515
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154 boot_kernel();
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pascal@19515
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155 }
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pascal@19515
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156
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pascal@19515
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157 u16 root_dev;
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pascal@19515
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158 u16 vid_mode;
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pascal@19515
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159 const char* kernel_name = "bzImage";
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pascal@19515
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160 const char* initrd_name;
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pascal@19515
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161 int main(int argc, char *argv[])
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pascal@19515
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162 {
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pascal@19515
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163 char *iso = NULL;
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pascal@19515
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164 argv[0] = progname();
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pascal@19515
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165 bootiso(argv); // iso ? parsing is /init.exe stuff !
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pascal@19515
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166
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pascal@19515
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167 if (argc < 2) {
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pascal@19546
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168 try_default_args();
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pascal@19515
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169 dousage:
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pascal@19580
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170 die("Usage: tazboot [[@commands]|[-f][-b base_himem][kernel=<bzimage>] \
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pascal@19538
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171 [initrd=<rootfs>[,<rootfs2>...]] [bootfrom=<isofile>] ...]\r\n\n\
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pascal@19538
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172 Defaults: tazboot kernel=bzImage auto\r\n\n\
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pascal@19538
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173 Examples for tazboot.cmd:\r\n\n\
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pascal@19538
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174 bootfrom=\\isos\\slitaz-4.0.iso\r\n\
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pascal@19538
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175 kernel=boot/bzImage\r\n\
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pascal@19538
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176 initrd=boot/rootfs4.gz,boot/rootfs3.gz,boot/rootfs2.gz,boot/rootfs1.gz,\\slitaz\\extrafs.gz\r\n\
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pascal@19538
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177 rw root=/dev/null vga=normal autologin\r\n\n\
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pascal@19538
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178 kernel=\\slitaz\\elks\r\n\
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pascal@19538
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179 root=/dev/bda1 ro\r\n");
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pascal@19515
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180 }
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pascal@19546
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181 bootiso(argv + 1);
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pascal@19546
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182 chdirname(*argv);
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pascal@19538
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183 for (int i=0;;) {
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pascal@19546
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184 char *s;
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pascal@19580
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185 next: argv++;
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pascal@19546
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186 s=*argv;
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pascal@19538
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187 i++;
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pascal@19538
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188 if (!s) break;
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pascal@19538
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189 if (strhead(s,"kernel=") == 0) {
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pascal@19825
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190 s++;
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pascal@19538
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191 set_kernel:
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pascal@19825
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192 s += 6;
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pascal@19538
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193 kernel_name = s;
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pascal@19538
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194 }
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pascal@19538
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195 else if (strhead(s,"image=") == 0) {
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pascal@19538
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196 goto set_kernel;
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pascal@19538
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197 }
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pascal@19538
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198 else if (strhead(s,"initrd=") == 0) {
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pascal@19538
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199 s += 7;
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pascal@19538
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200 initrd_name = s;
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pascal@19538
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201 }
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pascal@19538
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202 else if (strhead(s,"bootfrom=") == 0) {
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pascal@19538
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203 s += 9;
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pascal@19538
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204 set_iso:
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pascal@19538
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205 iso = s;
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pascal@19538
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206 }
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pascal@19538
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207 else if (strhead(s,"iso=") == 0) {
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pascal@19538
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208 s += 4;
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pascal@19538
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209 goto set_iso;
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pascal@19538
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210 }
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pascal@19515
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211 else if(strhead(s,"vga=") == 0) {
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pascal@19538
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212 s += 4;
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pascal@19538
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213 vid_mode = strtol(s); // support normal, extended & ask
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pascal@19515
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214 }
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pascal@19580
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215 else switch (*(u16 *)s|0x2002) {
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pascal@19580
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216 case 0x662F: // -F /f
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pascal@19580
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217 skip_alloc++;
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pascal@19580
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218 goto next;
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pascal@19580
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219 case 0x652F: // -E /e
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pascal@19580
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220 argv++;
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pascal@19580
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221 topmem = strtol(*argv);
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pascal@19580
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222 goto next;
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pascal@19580
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223 case 0x622F: // -B /b
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pascal@19580
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224 argv++;
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pascal@19580
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225 base_himem = strtol(*argv);
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pascal@19580
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226 goto next;
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pascal@19580
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227 default:
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pascal@19580
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228 if(i == 1 && fileattr(s) != -1) {
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pascal@19538
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229 goto set_kernel;
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pascal@19538
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230 }
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pascal@19515
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231 else {
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pascal@19515
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232 if(strhead(s,"root=") == 0) {
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pascal@19538
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233 s += 5;
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pascal@19538
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234 root_dev = strtol(s);
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pascal@19515
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235 }
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pascal@19515
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236 if(strhead(s,"mem=") == 0) {
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pascal@19538
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237 s += 4;
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pascal@19538
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238 topmem = strtol(s);
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pascal@19515
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239 }
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pascal@19538
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240 strcatb(_cmdline,*argv);
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pascal@19580
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241 }}
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pascal@19515
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242 }
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pascal@19515
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243 if (iso && isoreset(iso) >= 0) {
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pascal@19515
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244 char *s = (char *) initrd_name;
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pascal@19515
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245 if (isoopen((char *) kernel_name) >= 0) {
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pascal@19515
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246 isokernel();
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pascal@19515
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247 }
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pascal@19515
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248 if (s) {
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pascal@19515
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249 while (*s) {
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pascal@19515
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250 char *p, c;
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pascal@19515
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251 for (p = s; *s && *s != ','; s++);
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pascal@19515
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252 c = *s; *s = 0;
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pascal@19515
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253 if (isoopen(p) >= 0) {
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pascal@19515
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254 addinitrd();
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pascal@19515
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255 }
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pascal@19515
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256 *s = c;
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pascal@19515
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257 if (c) s++;
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pascal@19515
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258 }
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pascal@19515
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259 load_initrds();
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pascal@19515
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260 }
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pascal@19515
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261 }
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pascal@19515
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262 else {
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pascal@19515
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263 load_kernel();
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pascal@19515
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264 load_initrd();
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pascal@19515
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265 }
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pascal@19515
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266 boot_kernel();
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pascal@19515
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267 return _AX;
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pascal@19515
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268 }
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