wok annotate linld/stuff/src/TAZBOOT.CPP @ rev 19546

linld/tazboot: default conf in tazboot.cmd
author Pascal Bellard <pascal.bellard@slitaz.org>
date Tue Dec 06 18:49:44 2016 +0100 (2016-12-06)
parents 7f92b23984dc
children e428345df29a
rev   line source
pascal@19515 1 // This file is distributed under GPL
pascal@19515 2 //
pascal@19515 3 // TAZBOOT main() lives here
pascal@19515 4
pascal@19515 5 #include "crtl.h"
pascal@19515 6 #include "crtlx.h"
pascal@19515 7 #include "common.h"
pascal@19515 8 #include "iso9660.h"
pascal@19515 9
pascal@19515 10 #define MAXINITRD 10
pascal@19515 11 static struct initrd_state {
pascal@19515 12 u32 ofs[MAXINITRD];
pascal@19515 13 u32 size[MAXINITRD];
pascal@19515 14 u16 cnt;
pascal@19515 15 } initrd_state;
pascal@19515 16
pascal@19515 17 static void next_chunk(struct image_himem *m)
pascal@19515 18 {
pascal@19515 19 m->chunk_size = 0;
pascal@19515 20 if (m->state >= initrd_state.cnt) return;
pascal@19515 21 lseek(m->fd,initrd_state.ofs[m->state],SEEK_SET);
pascal@19515 22 m->chunk_size = initrd_state.size[m->state];
pascal@19515 23 m->state++;
pascal@19515 24 }
pascal@19515 25
pascal@19538 26 static u32 isofilesize4round()
pascal@19538 27 {
pascal@19538 28 return (isofilesize+3)&-4;
pascal@19538 29 }
pascal@19538 30
pascal@19515 31 static void addinitrd()
pascal@19515 32 {
pascal@19538 33 struct initrd_state *p = &initrd_state;
pascal@19538 34 if (p->cnt >= MAXINITRD) return;
pascal@19538 35 p->size[p->cnt] = isofilesize;
pascal@19538 36 p->ofs[p->cnt] = isofileofs;
pascal@19538 37 p->cnt++;
pascal@19538 38 initrd.size += isofilesize4round();
pascal@19515 39 }
pascal@19515 40
pascal@19515 41 static void load_initrds()
pascal@19515 42 {
pascal@19538 43 struct image_himem *m = &initrd;
pascal@19538 44 if (!m->size) return;
pascal@19538 45 m->next_chunk = next_chunk;
pascal@19538 46 m->fd = isofd;
pascal@19538 47 m->state = 0;
pascal@19538 48 next_chunk(m);
pascal@19515 49 load_initrd();
pascal@19515 50 }
pascal@19515 51
pascal@19538 52 static char *isokernel()
pascal@19515 53 {
pascal@19538 54 struct image_himem *m = &pm;
pascal@19538 55 m->chunk_size = m->size = isofilesize4round();
pascal@19538 56 m->fd = isofd;
pascal@19538 57 return load_kernel();
pascal@19515 58 }
pascal@19515 59
pascal@19515 60 char _cmdline[256];
pascal@19515 61 const char *cmdline = (const char *) _cmdline;
pascal@19515 62 extern int skip_xmmalloc;
pascal@19515 63 static void bootiso(char **iso)
pascal@19515 64 {
pascal@19515 65 char *init = " rdinit=/init.exe", *mode="menu";
pascal@19515 66 char *s, c, rootfs[16], fallback[16];
pascal@19515 67 int restart, isknoppix = 0;
pascal@19515 68 unsigned long magic;
pascal@19515 69
pascal@19515 70 if (!*iso || isoreset(*iso) < 0) return;
pascal@19515 71 skip_xmmalloc++;
pascal@19515 72 isoopen("boot") >= 0 ||
pascal@19515 73 isoopen("live") >= 0 || // debian
pascal@19515 74 isoopen("casper") >= 0; // ubuntu
pascal@19515 75 if (iso[1] && !strcmp(mode = iso[1], "text"))
pascal@19515 76 init = "";
pascal@19515 77 do {
pascal@19515 78 if (isoopen(mode) >= 0 || // custom
pascal@19515 79 isoopen("bzImage") >= 0 || // SliTaz
pascal@19515 80 isoopen("vmlinuz") >= 0 || // misc
pascal@19515 81 (isoopen("linux") >= 0 && ++isknoppix)) {
pascal@19538 82 magic = kver2ul(isokernel());
pascal@19515 83 break;
pascal@19515 84 }
pascal@19515 85 } while (isoopen("isolinux") >= 0); // Knoppix
pascal@19515 86 fallback[0] = 0;
pascal@19515 87 for (c = 0, restart = 1; isoreaddir(restart) == 0; restart = 0) {
pascal@19515 88 if (strstr(isofilename, ".gz"))
pascal@19515 89 strcpy(fallback, isofilename);
pascal@19515 90 if (strhead(isofilename, "rootfs")
pascal@19515 91 || c > isofilename[6]) continue;
pascal@19515 92 strcpy(rootfs, isofilename);
pascal@19515 93 c = isofilename[6];
pascal@19515 94 }
pascal@19515 95
pascal@19515 96 strcpy(_cmdline,"rw root=/dev/null autologin bootfrom=");
pascal@19515 97 strcat(_cmdline,*iso);
pascal@19515 98 if (magic < 0x20630)
pascal@19515 99 init = ""; // Does not support multiple initramfs
pascal@19515 100
pascal@19515 101 if (magic > 0) {
pascal@19515 102 char *initrd = fallback;
pascal@19515 103
pascal@19515 104 if (rootfs[0]) {
pascal@19515 105 initrd = rootfs;
pascal@19515 106 if (rootfs[6] != '.' && isoopen("rootfs.gz") >= 0)
pascal@19515 107 addinitrd(); // for loram
pascal@19515 108 }
pascal@19515 109 if (isoopen(initrd) >= 0) {
pascal@19515 110 addinitrd();
pascal@19515 111 }
pascal@19538 112 if (*init && lseek(isofd, 20L, SEEK_SET) != -1) {
pascal@19538 113 read(isofd, &isofileofs, 4);
pascal@19538 114 read(isofd, &magic, 4);
pascal@19515 115 isofileofs &= 0xFFFFL;
pascal@19515 116 isofilesize = magic & 0xFFFFL;
pascal@19515 117 isofileofs -= 0xC0L + isofilesize;
pascal@19515 118 if (isofilesize) addinitrd();
pascal@19515 119 else init="";
pascal@19515 120 }
pascal@19515 121 load_initrds();
pascal@19515 122 strcat(_cmdline,init);
pascal@19538 123 strcatb(_cmdline,"mode=");
pascal@19515 124 strcat(_cmdline,mode);
pascal@19538 125 strcatb(_cmdline,"magic=");
pascal@19515 126 strcat(_cmdline,ultoa(magic));
pascal@19515 127 }
pascal@19515 128 if (isknoppix) {
pascal@19515 129 if (iso[0][1] == ':')
pascal@19515 130 *iso += 2;
pascal@19515 131 for (s = *iso; *s; s++)
pascal@19515 132 if (*s == '\\') *s = '/';
pascal@19515 133 }
pascal@19515 134 close(isofd);
pascal@19515 135 boot_kernel();
pascal@19515 136 }
pascal@19515 137
pascal@19515 138 u16 root_dev;
pascal@19515 139 u16 vid_mode;
pascal@19515 140 const char* kernel_name = "bzImage";
pascal@19515 141 const char* initrd_name;
pascal@19515 142 int main(int argc, char *argv[])
pascal@19515 143 {
pascal@19515 144 char *iso = NULL;
pascal@19515 145 argv[0] = progname();
pascal@19515 146 bootiso(argv); // iso ? parsing is /init.exe stuff !
pascal@19515 147
pascal@19515 148 if (argc < 2) {
pascal@19546 149 try_default_args();
pascal@19515 150 dousage:
pascal@19538 151 die("Usage: tazboot [[@commands]|[-f][kernel=<bzimage>] \
pascal@19538 152 [initrd=<rootfs>[,<rootfs2>...]] [bootfrom=<isofile>] ...]\r\n\n\
pascal@19538 153 Defaults: tazboot kernel=bzImage auto\r\n\n\
pascal@19538 154 Examples for tazboot.cmd:\r\n\n\
pascal@19538 155 bootfrom=\\isos\\slitaz-4.0.iso\r\n\
pascal@19538 156 kernel=boot/bzImage\r\n\
pascal@19538 157 initrd=boot/rootfs4.gz,boot/rootfs3.gz,boot/rootfs2.gz,boot/rootfs1.gz,\\slitaz\\extrafs.gz\r\n\
pascal@19538 158 rw root=/dev/null vga=normal autologin\r\n\n\
pascal@19538 159 kernel=\\slitaz\\elks\r\n\
pascal@19538 160 root=/dev/bda1 ro\r\n");
pascal@19515 161 }
pascal@19546 162 bootiso(argv + 1);
pascal@19546 163 chdirname(*argv);
pascal@19538 164 for (int i=0;;) {
pascal@19546 165 char *s;
pascal@19546 166 argv++;
pascal@19546 167 s=*argv;
pascal@19538 168 i++;
pascal@19538 169 if (!s) break;
pascal@19538 170 if (strhead(s,"kernel=") == 0) {
pascal@19538 171 s += 7;
pascal@19538 172 set_kernel:
pascal@19538 173 kernel_name = s;
pascal@19538 174 }
pascal@19538 175 else if (strhead(s,"image=") == 0) {
pascal@19538 176 s += 6;
pascal@19538 177 goto set_kernel;
pascal@19538 178 }
pascal@19538 179 else if (strhead(s,"initrd=") == 0) {
pascal@19538 180 s += 7;
pascal@19538 181 initrd_name = s;
pascal@19538 182 }
pascal@19538 183 else if (strhead(s,"bootfrom=") == 0) {
pascal@19538 184 s += 9;
pascal@19538 185 set_iso:
pascal@19538 186 iso = s;
pascal@19538 187 }
pascal@19538 188 else if (strhead(s,"iso=") == 0) {
pascal@19538 189 s += 4;
pascal@19538 190 goto set_iso;
pascal@19538 191 }
pascal@19515 192 else if(strhead(s,"vga=") == 0) {
pascal@19538 193 s += 4;
pascal@19538 194 vid_mode = strtol(s); // support normal, extended & ask
pascal@19515 195 }
pascal@19538 196 else if((*(u16 *)s|0x2002) == 0x662F) { // -F /f
pascal@19515 197 skip_xmmalloc++;
pascal@19515 198 }
pascal@19538 199 else if(i == 1 && fileattr(s) != -1) {
pascal@19538 200 goto set_kernel;
pascal@19538 201 }
pascal@19515 202 else {
pascal@19515 203 if(strhead(s,"root=") == 0) {
pascal@19538 204 s += 5;
pascal@19538 205 root_dev = strtol(s);
pascal@19515 206 }
pascal@19515 207 if(strhead(s,"mem=") == 0) {
pascal@19538 208 s += 4;
pascal@19538 209 topmem = strtol(s);
pascal@19515 210 }
pascal@19538 211 strcatb(_cmdline,*argv);
pascal@19515 212 }
pascal@19515 213 }
pascal@19515 214 if (iso && isoreset(iso) >= 0) {
pascal@19515 215 char *s = (char *) initrd_name;
pascal@19515 216 if (isoopen((char *) kernel_name) >= 0) {
pascal@19515 217 isokernel();
pascal@19515 218 }
pascal@19515 219 if (s) {
pascal@19515 220 while (*s) {
pascal@19515 221 char *p, c;
pascal@19515 222 for (p = s; *s && *s != ','; s++);
pascal@19515 223 c = *s; *s = 0;
pascal@19515 224 if (isoopen(p) >= 0) {
pascal@19515 225 addinitrd();
pascal@19515 226 }
pascal@19515 227 *s = c;
pascal@19515 228 if (c) s++;
pascal@19515 229 }
pascal@19515 230 load_initrds();
pascal@19515 231 }
pascal@19515 232 }
pascal@19515 233 else {
pascal@19515 234 load_kernel();
pascal@19515 235 load_initrd();
pascal@19515 236 }
pascal@19515 237 boot_kernel();
pascal@19515 238 return _AX;
pascal@19515 239 }