platform_unix.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/param.h>
#include <errno.h>
#include <assert.h>
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#include <sys/wait.h>
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#if USE_PTHREAD
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#include <pthread.h>
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#include "platform.h"
#include "ui.h"
int file_exists(const char *fname)
{
struct stat statbuf;
return(stat(fname, &statbuf) == 0);
} /* file_exists */
int file_is_directory(const char *fname)
{
struct stat statbuf;
int retval = 0;
if (stat(fname, &statbuf) == 0)
{
if (S_ISDIR(statbuf.st_mode))
retval = 1;
} /* if */
return(retval);
} /* file_is_directory */
int file_is_symlink(const char *fname)
{
struct stat statbuf;
int retval = 0;
if (lstat(fname, &statbuf) == 0)
{
if (S_ISLNK(statbuf.st_mode))
retval = 1;
} /* if */
return(retval);
} /* file_is_symlink */
/* enumerate contents of (base) directory. */
file_list *make_filelist(const char *base)
{
file_list *retval = NULL;
file_list *l = NULL;
file_list *prev = NULL;
DIR *dir;
struct dirent *ent;
errno = 0;
dir = opendir(base);
if (dir == NULL)
{
_fatal("Error: could not read dir %s: %s.", base, strerror(errno));
return(NULL);
} /* if */
while (1)
{
ent = readdir(dir);
if (ent == NULL) /* we're done. */
break;
if (strcmp(ent->d_name, ".") == 0)
continue;
if (strcmp(ent->d_name, "..") == 0)
continue;
/*
* !!! FIXME: This is a workaround until symlinks are really
* !!! FIXME: supported...just pretend they don't exist for now. :(
*/
{
char buf[MAXPATHLEN];
snprintf(buf, sizeof (buf), "%s/%s", base, ent->d_name);
if (file_is_symlink(buf))
continue;
}
l = (file_list *) malloc(sizeof (file_list));
if (l == NULL)
{
_fatal("Error: out of memory.");
break;
} /* if */
l->fname = (char *) malloc(strlen(ent->d_name) + 1);
if (l->fname == NULL)
{
free(l);
_fatal("Error: out of memory.");
break;
} /* if */
strcpy(l->fname, ent->d_name);
if (retval == NULL)
retval = l;
else
prev->next = l;
prev = l;
l->next = NULL;
} /* while */
closedir(dir);
return(retval);
} /* make_filelist */
int get_file_size(const char *fname, long *fsize)
{
struct stat statbuf;
assert(fsize != NULL);
if (stat(fname, &statbuf) == -1)
{
_fatal("Error: failed to get filesize of [%s]: %s.",
fname, strerror(errno));
return(0);
} /* if */
*fsize = statbuf.st_size;
return(1);
} /* get_file_size */
char *get_realpath(const char *path)
{
char resolved_path[MAXPATHLEN];
char *retval = NULL;
errno = 0;
if (!realpath(path, resolved_path))
{
_fatal("Can't determine full path of [%s]: %s.",
path, strerror(errno));
return(NULL);
} /* if */
retval = malloc(strlen(resolved_path) + 1);
if (retval == NULL)
{
_fatal("Error: out of memory.");
return(NULL);
} /* if */
strcpy(retval, resolved_path);
return(retval);
} /* get_realpath */
#ifdef PLATFORM_MACOSX
#include <ApplicationServices/ApplicationServices.h>
static char *parse_xml(char *ptr, char **tag, char **val)
{
char *ptr2;
while ( (ptr = strchr(ptr, '<')) != NULL )
{
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ptr++; /* skip past '<' to start of tag.*/
if (*ptr == '/') continue; /* prior endtag? */
if (*ptr == '!') continue; /* initial crap? */
if (*ptr == '?') continue; /* initial crap? */
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*tag = ptr;
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*(ptr-1) = '/'; /* prepend a '/' so we can search for the endtag. */
ptr2 = strchr(ptr, ' '); /* look for a space (tag attributes?) */
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if ( (ptr = strchr(ptr, '>')) == NULL ) return(NULL);
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if ((ptr2) && (ptr2 < ptr)) *ptr2 = '\0'; /* chop out attributes. */
*ptr = '\0'; /* chop off '<' at end of tag. */
*val = ptr + 1; /* (*val) == start of children of this tag. */
/* Catch <tagname/> tags... */
ptr2 = ptr - 1;
while ( (ptr2 != *tag) && (isspace(*ptr2)) )
ptr2--;
if ((ptr2 != *tag) && (*ptr2 == '/')) /* it's a <tag/> ... skip it. */
{
ptr = *val;
continue;
} /* if */
/* look for endtag... */
ptr++;
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while ( (ptr = strstr(ptr, (*tag)-1)) != NULL )
{
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if (*(ptr-1) != '<') { ptr++; continue; } /* false positive */
*(ptr-1) = '\0'; /* null-terminate tag's children. */
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break;
} /* while */
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/* return everything after this tag's children. */
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return((ptr == NULL) ? NULL : ptr + 1);
} /* while */
return(NULL);
} /* parse_xml */
static char *find_info_plist_version(char *ptr)
{
int have_key = 0;
char *tag;
char *val;
while ( (ptr = parse_xml(ptr, &tag, &val)) != NULL )
{
if (have_key)
{
have_key = 0;
if (strcasecmp(tag, "string") == 0)
return(val);
} /* if */
if ((strcasecmp(tag, "plist") == 0) || (strcasecmp(tag, "dict") == 0))
{
ptr = val;
continue;
} /* if */
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/* You should only use CFBundleShortVersionString, for various
* reasons not worth explaining here. CFBundleVersion is here
* for older products that need to update to the other tag.
*/
if (strcasecmp(tag,"key") == 0)
{
if (strcasecmp(val,"CFBundleVersion") == 0)
have_key = 1;
if (strcasecmp(val,"CFBundleShortVersionString") == 0)
have_key = 1;
} /* if */
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} /* while */
return(NULL);
} /* find_info_plist_version */
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/* !!! FIXME: Code duplication */
static char *find_info_plist_bundle_id(char *ptr)
{
int have_key = 0;
char *tag;
char *val;
while ( (ptr = parse_xml(ptr, &tag, &val)) != NULL )
{
if (have_key)
{
have_key = 0;
if (strcasecmp(tag, "string") == 0)
return(val);
} /* if */
if ((strcasecmp(tag, "plist") == 0) || (strcasecmp(tag, "dict") == 0))
{
ptr = val;
continue;
} /* if */
if (strcasecmp(tag,"key") == 0)
{
if (strcasecmp(val,"CFBundleIdentifier") == 0)
have_key = 1;
} /* if */
} /* while */
return(NULL);
} /* find_info_plist_version */
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static int parse_info_dot_plist(const char *ident,
const char *version,
const char *newversion)
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{
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const char *fname = "Contents/Info.plist"; /* already chdir'd for this. */
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char *mem = NULL;
char *ptr;
long fsize;
int retval = 0;
FILE *io = NULL;
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int knowver = 0;
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if ( !get_file_size(fname, &fsize) ) goto parse_info_plist_bailed;
if ( (mem = malloc(fsize + 1)) == NULL ) goto parse_info_plist_bailed;
if ( (io = fopen(fname, "r")) == NULL ) goto parse_info_plist_bailed;
if ( (fread(mem, fsize, 1, io)) != 1 ) goto parse_info_plist_bailed;
fclose(io);
io = NULL;
mem[fsize] = '\0';
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ptr = find_info_plist_bundle_id(mem);
if ((ptr == NULL) || (strcasecmp(ptr, ident) != 0))
{
int yes = ui_prompt_ny("We don't think we're looking at the right directory!"
" Are you SURE this is the right place?"
" If you aren't sure, clicking 'Yes' can destroy unrelated files!");
if (!yes)
{
_fatal("Stopping at user's request.");
free(mem);
return(0);
} /* if */
} /* if */
if ( (io = fopen(fname, "r")) == NULL ) goto parse_info_plist_bailed;
if ( (fread(mem, fsize, 1, io)) != 1 ) goto parse_info_plist_bailed;
fclose(io);
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ptr = find_info_plist_version(mem);
if (ptr != NULL)
{
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knowver = 1;
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retval = version_ok(ptr, version, newversion);
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if (retval == -1)
_fatal("You seem to be all patched up already!");
else if (retval == 0)
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{
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_fatal("This patch applies to version '%s', but you have '%s'.",
version, ptr);
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} /* else */
} /* if */
parse_info_plist_bailed:
free(mem);
if (io != NULL)
fclose(io);
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if (!knowver) _fatal("Can't determine product's installed version.");
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return(retval);
} /* parse_info_dot_plist */
int update_version(const char *ver)
{
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const char *fname = "Contents/Info.plist"; /* already chdir'd for this. */
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char *mem = NULL;
char *ptr;
long fsize;
int retval = 0;
long writestart;
long writeend;
FILE *io = NULL;
if ( !get_file_size(fname, &fsize) ) goto update_version_bailed;
if ( (mem = malloc(fsize + 1)) == NULL ) goto update_version_bailed;
if ( (io = fopen(fname, "r+")) == NULL ) goto update_version_bailed;
if ( (fread(mem, fsize, 1, io)) != 1 ) goto update_version_bailed;
mem[fsize] = '\0';
ptr = find_info_plist_version(mem);
if (ptr == NULL) goto update_version_bailed;
writestart = (long) (ptr - mem);
writeend = writestart + strlen(ptr);
ptr = mem + writeend;
if ( (fseek(io, 0, SEEK_SET) == -1) ) goto update_version_bailed;
if ( (fread(mem, fsize, 1, io)) != 1 ) goto update_version_bailed;
if ( (fseek(io, writestart, SEEK_SET) == -1) ) goto update_version_bailed;
if ( (fwrite(ver, strlen(ver), 1, io)) != 1 ) goto update_version_bailed;
if ( (fwrite(ptr, strlen(ptr), 1, io)) != 1 ) goto update_version_bailed;
for (fsize = (writeend - writestart); fsize > 0; fsize--)
if (fwrite(" ", 1, 1, io) != 1) goto update_version_bailed;
retval = 1;
update_version_bailed:
free(mem);
if (io != NULL)
fclose(io);
if (!retval) _fatal("Can't update product's installed version.");
return(retval);
} /* update_version */
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int manually_locate_product(const char *name, char *buf, size_t bufsize);
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int chdir_by_identifier(const char *name, const char *str,
const char *version, const char *newversion)
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{
char buf[MAXPATHLEN];
Boolean b;
OSStatus rc;
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int found = 0;
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int hasident = ((str != NULL) && (*str));
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/* if an identifier is specified, ask LaunchServices to find product... */
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{
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CFURLRef url = NULL;
CFStringRef id = CFStringCreateWithBytes(NULL, str, strlen(str),
kCFStringEncodingISOLatin1, 0);
rc = LSFindApplicationForInfo(kLSUnknownCreator, id, NULL, NULL, &url);
CFRelease(id);
if (rc == noErr)
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b = CFURLGetFileSystemRepresentation(url, TRUE, buf, sizeof (buf));
CFRelease(url);
if (!b)
{
_fatal("Internal error.");
return(0);
} /* if */
found = 1;
} /* if */
else
{
_log("Couldn't find product. Perhaps it isn't installed?");
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} /* if */
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if (!found) /* No identifier, or LaunchServices couldn't find it. */
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{
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if (!manually_locate_product(name, buf, sizeof (buf)))
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{
_fatal("We can't patch the product if we can't find it!");
return(0);
} /* if */
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} /* if */
_log("I think the product is installed at [%s].", buf);
if (chdir(buf) != 0)
{
_fatal("Failed to change to product's installation directory.");
return(0);
} /* if */
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if (hasident)
return(parse_info_dot_plist(str, version, newversion));
return(1);
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} /* chdir_by_identifier */
int show_and_install_readme(const char *fname, const char *text)
{
FILE *io;
char *cmd;
const char *envr = getenv("HOME");
if (!envr)
{
_fatal("HOME environment var not set?");
return(0);
} /* if */
cmd = alloca(strlen(fname) + strlen(envr) + 30);
strcpy(cmd, "open ");
strcat(cmd, envr);
if (cmd[strlen(cmd)-1] != '/')
strcat(cmd, "/");
strcat(cmd, "Desktop/");
strcat(cmd, fname);
io = fopen(cmd + 5, "w");
if (!io)
{
_fatal("Failed to open [%s] for writing.", cmd+5);
return(0);
} /* if */
/* !!! FIXME: error checking! */
fputs(text, io);
fclose(io);
system(cmd);
return(1);
} /* show_and_install_readme */
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#else /* Regular old POSIX-compliant Unix... */
int update_version(const char *ver)
{
/*
* !!! FIXME: need some way to flag this install as updated...
* !!! FIXME: maybe just leave unimplemented?
*/
_fatal("Not implemented!");
return(0);
} /* show_and_install_readme */
int show_and_install_readme(const char *fname, const char *text)
{
/*
* !!! FIXME: Can just dump to stdout? This should really be in the
* !!! FIXME: UI modules...
*/
_fatal("Not implemented!");
return(0);
} /* show_and_install_readme */
int chdir_by_identifier(const char *name, const char *str,
const char *version, const char *newversion)
{
/*
* !!! FIXME: need some way to find the program automatically...
* !!! FIXME: maybe just prompt the user? Oh well.
*/
_fatal("Not implemented!");
return(0);
} /* chdir_by_identifier */
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#endif
int calc_tmp_filenames(char **tmp1, char **tmp2)
{
static char _tmp1[MAXPATHLEN];
static char _tmp2[MAXPATHLEN];
pid_t pid = getpid();
snprintf(_tmp1, sizeof (_tmp1), "/tmp/mojopatch.tmp1.%d", (int) pid);
snprintf(_tmp2, sizeof (_tmp2), "/tmp/mojopatch.tmp2.%d", (int) pid);
*tmp1 = _tmp1;
*tmp2 = _tmp2;
return(1);
} /* calc_tmp_filenames */
static char *basedir = NULL;
static volatile int thread_alive = 0;
static void *spawn_thread(void *arg)
{
static int rc;
rc = system((char *) arg);
thread_alive = 0;
return(&rc);
} /* spawn_thread */
int spawn_xdelta(const char *cmdline)
{
const char *binname = "xdelta";
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char *cmd = alloca(strlen(cmdline) + strlen(basedir) + strlen(binname) + 5);
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if (!cmd)
return(0);
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sprintf(cmd, "\"%s/%s\" %s", basedir, binname, cmdline);
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#if !USE_PTHREAD
int rc = 0;
pid_t pid = fork();
if (pid == -1)
{
int e = errno;
_fatal("fork() failed: %d (%s)", e, strerror(e));
return(0);
} /* if */
else if (pid == 0) // child process.
{
rc = spawn_thread(cmd);
exit(1); /* !!! FIXME *((int *) rc) == 0 ); */
} /* else if */
else
{
while (waitpid(pid, &rc, WNOHANG) == 0)
{
ui_pump();
usleep(10000);
} /* while */
return(1);
} /* else */
#else
pthread_t thr;
void *rc;
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thread_alive = 1;
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if (pthread_create(&thr, NULL, spawn_thread, cmd) != 0)
return(0);
while (thread_alive)
{
ui_pump();
usleep(10000);
} /* while */
pthread_join(thr, &rc);
return(1); /* !!! FIXME *((int *) rc) == 0 ); */
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} /* spawn_xdelta */
static void find_basedir(int *argc, char **argv)
{
const char *argv0 = argv[0];
char buf[MAXPATHLEN];
char realbuf[MAXPATHLEN];
if ((argv0 != NULL) && (strchr(argv0, '/') != NULL)) /* path specifed? */
strncpy(buf, argv0, sizeof (buf));
else
{
char *ptr;
char *envr = getenv("PATH");
if (!envr)
return;
while (*envr)
{
ptr = strchr(envr, ':');
if (!ptr)
strcpy(buf, envr);
else
{
memcpy(buf, envr, (size_t) (ptr - envr));
buf[(size_t) (ptr - envr)] = '\0';
} /* else */
envr = ptr + 1;
if (*buf == '\0')
continue;
strcat(buf, "/");
strcat(buf, argv0);
if (access(buf, X_OK) == 0)
break;
if (!ptr)
{
strcpy(buf, "."); /* oh well. */
break;
} /* if */
} /* while */
} /* else */
buf[sizeof (buf) - 1] = '\0'; /* null terminate, just in case. */
if (realpath(buf, realbuf) == NULL)
return;
char *ptr = strrchr(realbuf, '/'); /* chop off binary name. */
if (ptr != NULL)
*ptr = '\0';
if (realbuf[strlen(realbuf)-1] != '/')
strcat(realbuf, "/");
basedir = malloc(strlen(realbuf + 1));
strcpy(basedir, realbuf);
#if PLATFORM_MACOSX
/* Chop off process serial number arg that the Finder adds... */
if ( (*argc >= 2) && (strncmp(argv[1], "-psn_", 5) == 0) )
{
*argc = *argc - 1;
argv[1] = NULL;
/* Now that we know where xdelta will be, chdir out of AppBundle... */
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/* !!! FIXME: Fails if there are more than one of these in the string... */
ptr = strstr(realbuf, "/Contents/MacOS/");
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if (ptr != NULL)
{
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ptr++; /* keep a '/' at the end of the string... */
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*ptr = '\0';
chdir(realbuf);
} /* if */
} /* if */
#endif
} /* find_basedir */
int main(int argc, char **argv)
{
int retval;
find_basedir(&argc, argv);
retval = mojopatch_main(argc, argv);
free(basedir);
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return((retval == PATCHSUCCESS) ? 0 : 1);
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} /* unixmain */
/* end of platform_unix.c ... */