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#include "urlib.c" |
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|
| 3 |
#include <stdio.h> |
| 4 |
#include <stdlib.h> |
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#include <unistd.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <time.h> |
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|
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#include "liblzf/lzf_d.c" |
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|
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#include "urlib.h" |
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|
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/* some simple? dynamic memory management for paths might save ltos of ram */ |
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static u_handle pack_handle; |
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static u_handle lock_handle; |
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static char tmppath[MAX_PATH]; |
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static char currdir[MAX_PATH]; |
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static char datadir[MAX_PATH]; // %AppData%/urlader |
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static char exe_dir[MAX_PATH]; // %AppData%/urlader/EXE_ID |
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static char execdir[MAX_PATH]; // %AppData%/urlader/EXE_ID/EXE_VER |
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static char exe_id[MAX_PATH]; |
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static char exe_ver[MAX_PATH]; |
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|
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static int exe_argc; |
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static const char *exe_argv[MAX_ARGC]; |
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static char exe_args[MAX_ARGS]; /* actual arguments strings copied here */ |
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static unsigned int exe_argo; |
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|
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static void |
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fatal (const char *msg) |
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{ |
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#ifdef _WIN32 |
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MessageBox (0, msg, URLADER, 0); |
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#else |
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write (2, URLADER ": ", sizeof (URLADER ": ") - 1); |
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write (2, msg, strlen (msg)); |
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write (2, "\n", 1); |
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#endif |
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|
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_exit (1); |
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} |
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|
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static void |
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tmpdir (const char *dir) |
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{ |
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static int cnt; |
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|
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for (;;) |
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{ |
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// #ifdef _WIN32 |
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// sprintf (tmppath, "%s/%x_%x.tmp", dir, (unsigned int)GetCurrentProcessId (), ++cnt); |
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// #else |
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sprintf (tmppath, "%s/t-%x_%x.tmp", dir, (unsigned int)getpid () , ++cnt); |
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// #endif |
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|
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if (!u_mkdir (tmppath)) |
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return; |
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} |
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} |
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|
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static void |
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systemv (const char *const argv[]) |
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{ |
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#ifdef _WIN32 |
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_spawnv (P_WAIT, argv [0], argv); |
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#else |
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pid_t pid = fork (); |
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|
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if (pid < 0) |
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fatal ("fork failure"); |
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|
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if (!pid) |
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{ |
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execv (argv [0], (void *)argv); |
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_exit (124); |
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} |
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|
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int status; |
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waitpid (pid, &status, 0); |
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#endif |
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} |
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|
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static void |
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deltree (const char *path) |
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{ |
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#ifdef _WIN32 |
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char buf[MAX_PATH * 2 + 64]; |
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const char *argv[] = { getenv ("COMSPEC"), "/c", "rd", "/s", "/q", buf, 0 }; |
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sprintf (buf, "\"%s\"", path); |
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#else |
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const char *argv[] = { "/bin/rm", "-rf", path, 0 }; |
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#endif |
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systemv (argv); |
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} |
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|
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static char *pack_base, *pack_end; |
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static struct u_pack_hdr *pack_cur; |
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static char *scratch; |
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static unsigned int scratch_size; |
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|
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#define PACK_NAME ((char *)(pack_cur + 1)) |
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#define PACK_DATA (PACK_NAME + u_16 (pack_cur->namelen) + 1) |
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#define PACK_VALID pack_cur->type |
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|
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static void |
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pack_next (void) |
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{ |
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unsigned int d = u_32 (pack_cur->datalen); |
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|
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pack_cur = (struct u_pack_hdr *)(PACK_DATA + d); |
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} |
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|
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static void |
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pack_unmap (void) |
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{ |
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if (pack_base) |
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{ |
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u_munmap (pack_base, pack_end - pack_base); |
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pack_base = 0; |
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} |
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|
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if (scratch) |
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{ |
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u_free (scratch, scratch_size); |
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scratch = 0; |
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} |
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} |
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|
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static int |
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pack_map (void) |
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{ |
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char *addr; |
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unsigned int size; |
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|
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#ifdef _WIN32 |
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BY_HANDLE_FILE_INFORMATION fi; |
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|
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if (!GetFileInformationByHandle (pack_handle, &fi)) |
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return 0; |
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|
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size = fi.nFileSizeLow; |
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#else |
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size = lseek (pack_handle, 0, SEEK_END); |
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#endif |
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|
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addr = u_mmap (pack_handle, size); |
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if (!addr) |
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return 0; |
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|
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pack_unmap (); |
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|
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pack_base = addr; |
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pack_end = pack_base + size; |
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|
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struct u_pack_tail *tail; |
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|
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tail = (void *)(pack_end - sizeof (*tail)); |
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|
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if (memcmp (tail->magic, TAIL_MAGIC, sizeof (TAIL_MAGIC) - 1)) |
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return 0; |
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|
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pack_cur = (struct u_pack_hdr *)(pack_end - u_32 (tail->size)); |
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|
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scratch = u_malloc (scratch_size = u_32 (tail->max_filesize)); |
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if (!scratch) |
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return 0; |
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|
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return 1; |
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} |
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|
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static void |
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exe_info (void) |
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{ |
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if (!pack_map ()) |
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fatal ("unable to locate packfile in executable - executable corrupted?"); |
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|
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if (pack_cur->type != U_T_META) |
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fatal ("unable to locate executable metadata - executable corrupted?"); |
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|
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strcpy (exe_id, PACK_NAME); |
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} |
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|
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static void |
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load (void) |
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{ |
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u_mkdir (datadir); |
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|
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strcpy (exe_dir, datadir); |
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u_append (exe_dir, exe_id); |
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u_mkdir (exe_dir); |
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|
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if (u_chdir (exe_dir)) |
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fatal ("unable to change to application data directory"); |
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|
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u_handle h = u_open ("override"); |
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if (u_valid (h)) |
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{ |
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u_handle oh = pack_handle; |
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|
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pack_handle = h; |
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if (!pack_map ()) |
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{ |
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pack_handle = oh; |
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oh = h; |
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} |
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|
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u_close (oh); |
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} |
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|
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if (pack_cur->type != U_T_META) |
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fatal ("unable to locate override metadata"); |
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|
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strcpy (exe_ver, PACK_DATA); |
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pack_next (); |
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|
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for (;;) |
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{ |
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if (pack_cur->type == U_T_ENV) |
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u_setenv (PACK_NAME, PACK_DATA); |
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else if (pack_cur->type == U_T_ARG) |
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{ |
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int len = u_16 (pack_cur->namelen) + 1; |
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exe_argv [exe_argc++] = exe_args + exe_argo; |
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memcpy (exe_args + exe_argo, PACK_NAME, len); |
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exe_argo += len; |
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} |
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else |
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break; |
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|
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pack_next (); |
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} |
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|
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done_env_arg: |
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strcpy (execdir, exe_dir); |
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u_append (execdir, "i-"); |
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strcat (execdir, exe_ver); |
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|
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strcat (strcpy (tmppath, execdir), ".lck"); |
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lock_handle = u_lock (tmppath, 0, 1); |
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if (!lock_handle) |
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fatal ("unable to lock application instance"); |
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|
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if (access (execdir, F_OK)) |
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{ |
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// does not exist yet, so unpack and move |
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tmpdir (exe_dir); |
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|
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if (u_chdir (tmppath)) |
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fatal ("unable to change to new instance directory"); |
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|
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for (;;) |
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{ |
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switch (pack_cur->type) |
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{ |
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case U_T_DIR: |
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u_mkdir (PACK_NAME); |
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break; |
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|
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case U_T_FILE: |
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{ |
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u_handle h = u_creat (PACK_NAME, pack_cur->flags & U_F_EXEC); |
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unsigned int dlen, len = u_32 (pack_cur->datalen); |
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char *data = PACK_DATA; |
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|
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if (pack_cur->flags & U_F_LZF) |
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if (dlen = lzf_decompress (data, len, scratch, scratch_size)) |
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{ |
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data = scratch; |
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len = dlen; |
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} |
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else |
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fatal ("unable to uncompress file data - pack corrupted?"); |
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|
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if (!u_valid (h)) |
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fatal ("unable to unpack file from packfile - disk full?"); |
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|
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if (u_write (h, data, len) != len) |
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fatal ("unable to unpack file from packfile - disk full?"); |
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|
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u_fsync (h); |
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u_close (h); |
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} |
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break; |
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|
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case U_T_NULL: |
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goto done; |
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} |
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|
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pack_next (); |
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} |
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|
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done: |
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if (u_chdir (datadir)) |
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fatal ("unable to change to data directory"); |
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|
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u_sync (); |
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|
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if (u_rename (tmppath, execdir)) |
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deltree (tmppath); // if move fails, delete new, assume other process created it independently |
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} |
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|
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pack_unmap (); |
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u_close (pack_handle); |
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|
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if (u_chdir (execdir)) |
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fatal ("unable to change to application instance directory"); |
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|
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u_setenv ("URLADER_VERSION", URLADER_VERSION); |
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u_setenv ("URLADER_DATADIR", datadir); |
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u_setenv ("URLADER_EXECDIR", execdir); |
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u_setenv ("URLADER_EXE_ID" , exe_id); |
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u_setenv ("URLADER_EXE_DIR", exe_dir); |
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u_setenv ("URLADER_EXE_VER", exe_ver); |
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|
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#if 0 |
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// yes, this is overkill |
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u_setenv ("SHLIB_PATH" , execdir); // hpux |
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u_setenv ("LIBPATH" , execdir); // aix |
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u_setenv ("LD_LIBRARY_PATH" , execdir); // most elf systems |
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u_setenv ("LD_LIBRARY_PATH_32", execdir); // solaris |
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u_setenv ("LD_LIBRARY_PATH_64", execdir); // solaris |
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u_setenv ("LD_LIBRARYN32_PATH", execdir); // irix |
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u_setenv ("LD_LIBRARY64_PATH" , execdir); // irix |
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u_setenv ("DYLD_LIBRARY_PATH" , execdir); // os sucks from apple |
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#endif |
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} |
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|
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static void |
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execute (void) |
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{ |
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exe_argv [exe_argc] = 0; |
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systemv (exe_argv); |
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} |
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|
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#ifdef _WIN32 |
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|
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int APIENTRY |
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WinMain (HINSTANCE hI, HINSTANCE hP, LPSTR argv, int command_show) |
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{ |
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if (!GetModuleFileName (hI, tmppath, sizeof (tmppath))) |
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fatal ("unable to find executable pack"); |
| 343 |
|
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pack_handle = u_open (tmppath); |
| 345 |
if (!u_valid (pack_handle)) |
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fatal ("unable to open executable pack"); |
| 347 |
|
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exe_info (); |
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|
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if (!GetCurrentDirectory (sizeof (currdir), currdir)) |
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strcpy (currdir, "."); |
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|
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if (SHGetFolderPath (0, CSIDL_APPDATA | CSIDL_FLAG_CREATE, NULL, SHGFP_TYPE_CURRENT, datadir) != S_OK) |
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fatal ("unable to find application data directory"); |
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|
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u_mkdir (datadir); |
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u_append (datadir, URLADER); |
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|
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load (); |
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execute (); |
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|
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return 0; |
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} |
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|
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#else |
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|
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int |
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main (int argc, char *argv[]) |
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{ |
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char *home = getenv ("HOME"); |
| 371 |
|
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pack_handle = u_open (argv [0]); |
| 373 |
if (!u_valid (pack_handle)) |
| 374 |
fatal ("unable to open executable pack"); |
| 375 |
|
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exe_info (); |
| 377 |
|
| 378 |
if (!home) |
| 379 |
{ |
| 380 |
struct passwd *pw; |
| 381 |
|
| 382 |
if ((pw = getpwuid (getuid ()))) |
| 383 |
home = pw->pw_dir; |
| 384 |
else |
| 385 |
home = "/tmp"; |
| 386 |
} |
| 387 |
|
| 388 |
if (!getcwd (currdir, sizeof (currdir))) |
| 389 |
strcpy (currdir, "."); |
| 390 |
|
| 391 |
u_mkdir (home); |
| 392 |
//strcat (strcat (strcpy (datadir, home), "/."), URLADER); |
| 393 |
sprintf (datadir, "%s/.%s", home, URLADER); |
| 394 |
u_mkdir (datadir); |
| 395 |
|
| 396 |
#if 0 |
| 397 |
if (gethostname (tmppath, sizeof (tmppath))) |
| 398 |
strcpy (tmppath, "default"); |
| 399 |
|
| 400 |
u_append (datadir, tmppath); |
| 401 |
#endif |
| 402 |
|
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load (); |
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execute (); |
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|
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return 0; |
| 407 |
} |
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|
| 409 |
#endif |
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|
