/
inifile.c
311 lines (273 loc) · 8.76 KB
/
inifile.c
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/*
* Some portions copyright (c) 1994-1995 by Symantec
* Copyright (c) 1999-2013 by Digital Mars
* All Rights Reserved
* http://www.digitalmars.com
* Written by Walter Bright
*
* This source file is made available for personal use
* only. The license is in backendlicense.txt
* For any other uses, please contact Digital Mars.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#if _WIN32
#include <windows.h>
#endif
#if __APPLE__
#include <sys/syslimits.h>
#endif
#if __FreeBSD__ || __OpenBSD__ || __sun
// for PATH_MAX
#include <limits.h>
#endif
#include "root.h"
#include "rmem.h"
#include "port.h"
#define LOG 0
char *skipspace(char *p);
const char *findinifile(const char *argv0, const char *inifile)
{
#if LOG
printf("findinifile(argv0 = '%s', inifile = '%s')\n", argv0, inifile);
#endif
if (FileName::absolute(inifile))
return inifile;
if (FileName::exists(inifile))
return inifile;
/* Look for inifile in the following sequence of places:
* o current directory
* o home directory
* o exe directory (windows)
* o directory off of argv0
* o SYSCONFDIR (default=/etc/) (non-windows)
*/
const char *filename = FileName::combine(getenv("HOME"), inifile);
if (FileName::exists(filename))
return filename;
#if _WIN32 // This fix by Tim Matthews
char resolved_name[MAX_PATH + 1];
if (GetModuleFileNameA(NULL, resolved_name, MAX_PATH + 1) && FileName::exists(resolved_name))
{
filename = FileName::replaceName(resolved_name, inifile);
if (FileName::exists(filename))
return filename;
}
#endif
filename = FileName::replaceName(argv0, inifile);
if (FileName::exists(filename))
return filename;
#if __linux__ || __APPLE__ || __FreeBSD__ || __OpenBSD__ || __sun
// Search PATH for argv0
const char *p = getenv("PATH");
#if LOG
printf("\tPATH='%s'\n", p);
#endif
Strings *paths = FileName::splitPath(p);
const char *abspath = FileName::searchPath(paths, argv0, 0);
if (abspath)
{
const char *absname = FileName::replaceName(abspath, inifile);
if (FileName::exists(absname))
return absname;
}
// Resolve symbolic links
filename = FileName::canonicalName(abspath ? abspath : argv0);
if (filename)
{
filename = FileName::replaceName(filename, inifile);
if (FileName::exists(filename))
return filename;
}
// Search /etc/ for inifile
#ifndef SYSCONFDIR
# error SYSCONFDIR not defined
#endif
assert(SYSCONFDIR != NULL && strlen(SYSCONFDIR));
filename = FileName::combine(SYSCONFDIR, inifile);
#endif // __linux__ || __APPLE__ || __FreeBSD__ || __OpenBSD__ || __sun
return filename;
}
/*****************************
* Read and analyze .ini file, i.e. write the entries of the specified section
* into the process environment
* Input:
* argv0 program name (argv[0])
* inifile .ini file name
* envsectionname name of the section to process
* Returns:
* file name of ini file
* Note: this is a memory leak
*/
const char *inifile(const char *argv0, const char *inifile, const char *envsectionname)
{
const char *filename = findinifile(argv0, inifile);
const char *path = FileName::path(filename); // need path for @P macro
#if LOG
printf("\tpath = '%s', filename = '%s'\n", path, filename);
#endif
File file(filename);
if (file.read())
return filename; // error reading file
// Parse into lines
bool envsection = true;
size_t envsectionnamelen = strlen(envsectionname);
OutBuffer buf;
bool eof = false;
for (size_t i = 0; i < file.len && !eof; i++)
{
Lstart:
size_t linestart = i;
for (; i < file.len; i++)
{
switch (file.buffer[i])
{
case '\r':
break;
case '\n':
// Skip if it was preceded by '\r'
if (i && file.buffer[i - 1] == '\r')
{
i++;
goto Lstart;
}
break;
case 0:
case 0x1A:
eof = true;
break;
default:
continue;
}
break;
}
buf.reset();
// First, expand the macros.
// Macros are bracketed by % characters.
for (size_t k = 0; k < i - linestart; k++)
{
// The line is file.buffer[linestart..i]
char *line = (char *)&file.buffer[linestart];
if (line[k] == '%')
{
for (size_t j = k + 1; j < i - linestart; j++)
{
if (line[j] != '%')
continue;
if (j - k == 3 && Port::memicmp(&line[k + 1], "@P", 2) == 0)
{
// %@P% is special meaning the path to the .ini file
const char *p = path;
if (!*p)
p = ".";
buf.writestring(p);
}
else
{
size_t len2 = j - k;
char *p = (char *)malloc(len2);
len2--;
memcpy(p, &line[k + 1], len2);
p[len2] = 0;
Port::strupr(p);
char *penv = getenv(p);
if (penv)
buf.writestring(penv);
free(p);
}
k = j;
goto L1;
}
}
buf.writeByte(line[k]);
L1:
;
}
// Remove trailing spaces
while (buf.offset && isspace(buf.data[buf.offset - 1]))
buf.offset--;
char *p = buf.peekString();
// The expanded line is in p.
// Now parse it for meaning.
p = skipspace(p);
switch (*p)
{
case ';': // comment
case 0: // blank
break;
case '[': // look for [Environment]
p = skipspace(p + 1);
char *pn;
for (pn = p; isalnum((utf8_t)*pn); pn++)
;
if (pn - p == envsectionnamelen &&
Port::memicmp(p, envsectionname, envsectionnamelen) == 0 &&
*skipspace(pn) == ']')
{
envsection = true;
}
else
envsection = false;
break;
default:
if (envsection)
{
char *pn = p;
// Convert name to upper case;
// remove spaces bracketing =
for (p = pn; *p; p++)
{
if (islower((utf8_t)*p))
*p &= ~0x20;
else if (isspace((utf8_t)*p))
{
memmove(p, p + 1, strlen(p));
p--;
}
else if (p[0] == '?' && p[1] == '=')
{
*p = '\0';
if (getenv(pn))
{
pn = NULL;
break;
}
// remove the '?' and resume parsing starting from
// '=' again so the regular variable format is
// parsed
memmove(p, p + 1, strlen(p + 1) + 1);
p--;
}
else if (*p == '=')
{
p++;
while (isspace((utf8_t)*p))
memmove(p, p + 1, strlen(p));
break;
}
}
if (pn)
{
putenv(strdup(pn));
#if LOG
printf("\tputenv('%s')\n", pn);
//printf("getenv(\"TEST\") = '%s'\n",getenv("TEST"));
#endif
}
}
break;
}
}
return filename;
}
/********************
* Skip spaces.
*/
char *skipspace(char *p)
{
while (isspace((utf8_t)*p))
p++;
return p;
}