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67 lines
1.3 KiB
67 lines
1.3 KiB
/*
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Simple and stupid file decompressor for an espfs image. Mostly used as a testbed for espfs.c and
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the decompressors: code compiled natively is way easier to debug using gdb et all :)
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "espfs.h"
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char *espFsData;
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int main(int argc, char **argv) {
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int f, out;
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int len;
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char buff[128];
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EspFsFile *ef;
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off_t size;
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EspFsInitResult ir;
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if (argc!=3) {
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printf("Usage: %s espfs-image file\nExpands file from the espfs-image archive.\n", argv[0]);
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exit(0);
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}
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f=open(argv[1], O_RDONLY);
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if (f<=0) {
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perror(argv[1]);
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exit(1);
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}
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size=lseek(f, 0, SEEK_END);
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espFsData=mmap(NULL, size, PROT_READ, MAP_SHARED, f, 0);
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if (espFsData==MAP_FAILED) {
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perror("mmap");
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exit(1);
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}
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ir=espFsInit(espFsData);
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if (ir != ESPFS_INIT_RESULT_OK) {
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printf("Couldn't init espfs filesystem (code %d)\n", ir);
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exit(1);
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}
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ef=espFsOpen(argv[2]);
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if (ef==NULL) {
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printf("Couldn't find %s in image.\n", argv[2]);
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exit(1);
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}
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out=open(argv[2], O_WRONLY|O_CREAT|O_TRUNC, 0644);
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if (out<=0) {
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perror(argv[2]);
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exit(1);
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}
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while ((len=espFsRead(ef, buff, 128))!=0) {
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write(out, buff, len);
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}
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espFsClose(ef);
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//munmap, close, ... I can't be bothered.
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}
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