toaruos/kernel/misc/args.c

87 lines
2.0 KiB
C

/* vim: tabstop=4 shiftwidth=4 noexpandtab
*
* Kernel Argument Parser
*
* Parses arguments passed by, ie, a Multiboot bootloader.
*
* Part of the ToAruOS Kernel.
* (C) 2011 Kevin Lange
*/
#include <system.h>
extern void bochs_install_wallpaper(char *);
/**
* Parse the given arguments to the kernel.
*
* @param arg A string containing all arguments, separated by spaces.
*/
void
parse_args(
char * arg /* Arguments */
) {
/* Sanity check... */
if (!arg) { return; }
char * pch; /* Tokenizer pointer */
char * save; /* We use the reentrant form of strtok */
char * argv[1024]; /* Command tokens (space-separated elements) */
int tokenid = 0; /* argc, basically */
/* Tokenize the arguments, splitting at spaces */
pch = strtok_r(arg," ",&save);
if (!pch) { return; }
while (pch != NULL) {
argv[tokenid] = (char *)pch;
++tokenid;
pch = strtok_r(NULL," ",&save);
}
argv[tokenid] = NULL;
/* Tokens are now stored in argv. */
for (int i = 0; i < tokenid; ++i) {
/* Parse each provided argument */
char * pch_i;
char * save_i;
char * argp[1024];
int argc = 0;
pch_i = strtok_r(argv[i],"=",&save_i);
if (!pch_i) { continue; }
while (pch_i != NULL) {
argp[argc] = (char *)pch_i;
++argc;
pch_i = strtok_r(NULL,"=",&save_i);
}
argp[argc] = NULL;
if (!strcmp(argp[0],"vid")) {
if (argc < 2) { kprintf("vid=?\n"); continue; }
uint16_t x, y;
if (argc < 4) {
x = 1024;
y = 768;
} else {
x = atoi(argp[2]);
y = atoi(argp[3]);
}
kprintf("--> Requested display resolution is %dx%d\n", x, y);
if (!strcmp(argp[1],"qemu")) {
/* Bochs / Qemu Video Device */
graphics_install_bochs(x,y);
} else if (!strcmp(argp[1],"vesa")) {
graphics_install_vesa(x,y);
} else {
kprintf("Unrecognized video adapter: %s\n", argp[1]);
}
} else if (!strcmp(argp[0],"hdd")) {
extern void ext2_disk_mount(void);
ext2_disk_mount();
} else if (!strcmp(argp[0],"single")) {
boot_arg = "--single";
} else if (!strcmp(argp[0],"vgaterm")) {
boot_arg = "--vga";
}
}
}