Macintosh-SW/mpw
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check for file in mpw_path

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This commit is contained in:
Kelvin Sherlock 2013-02-18 00:06:27 -05:00
parent c67dad27e4
commit 3a24ce64b6
1 changed files with 66 additions and 0 deletions
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66
bin/loader.cpp
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@ -8,6 +8,7 @@
#include <getopt.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include <CoreServices/CoreServices.h>
@ -642,6 +643,59 @@ bool parse_number(const char *input, uint32_t *dest)
return true;
}
bool file_exists(const std::string & name)
{
struct stat st;
return ::stat(name.c_str(), &st) == 0;
}
std::string find_exe(const std::string &name)
{
std::string path;
std::string subpath;
if (file_exists(name)) return name;
// if name is a path, then it doesn't exist.
if (name.find('/') != name.npos) return std::string();
// check in $MPW/name.
path = getenv("mpw_path");
// split on :
if (path.empty()) return std::string();
int start = 0, end = 0;
while ((end = path.find(':', start)) != path.npos)
{
subpath = path.substr(start, end - start);
if (subpath.length())
{
subpath.push_back('/');
subpath.append(name);
if (file_exists(subpath)) return subpath;
}
start = end + 1;
}
subpath = path.substr(start);
if (subpath.length())
{
subpath.push_back('/');
subpath.append(name);
if (file_exists(subpath)) return subpath;
}
return std::string();
}
int main(int argc, char **argv)
{
@ -749,6 +803,18 @@ int main(int argc, char **argv)
std::string command(argv[0]); // InitMPW updates argv...
command = find_exe(command);
if (command.empty())
{
const char *path = getenv("mpw_path");
fprintf(stderr, "Unable to find command %s\n", argv[0]);
fprintf(stderr, "mpw_path = %s\n", path ? path : "<null>");
exit(EX_USAGE);
}
argv[0] = ::strdup(command.c_str()); // hmm.. could setenv(mpw_command) instead.
Memory = new uint8_t[Flags.ram];
MemorySize = Flags.ram;