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require.c
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require.c
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/*
* ld - load code dynamically
*
* $Author: zimoch $
* $ID$
* $Date: 2015/06/29 09:47:30 $
*
* DISCLAIMER: Use at your own risc and so on. No warranty, no refund.
*/
#ifdef UNIX
/* for vasprintf and dl_iterate_phdr */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#endif
/* for 64 bit (NFS) file systems */
#define _FILE_OFFSET_BITS 64
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <recSup.h>
#include <initHooks.h>
#include <osiFileName.h>
#include <epicsVersion.h>
#ifdef BASE_VERSION
#define EPICS_3_13
#define epicsGetStdout() stdout
extern int dbLoadDatabase(const char *filename, const char *path, const char *substitutions);
int dbLoadRecords(const char *filename, const char *substitutions)
{
/* This implementation uses EPICS_DB_INCLUDE_PATH */
return dbLoadDatabase(filename, NULL, substitutions);
}
extern volatile int interruptAccept;
#else /* 3.14+ */
#include <iocsh.h>
#include <dbAccess.h>
/* This prototype is missing in older EPICS versions */
#ifndef EPICS_VERSION_INT
epicsShareFunc int epicsShareAPI iocshCmd(const char *cmd);
#endif
#include <epicsExit.h>
#include <epicsStdio.h>
#include <osiFileName.h>
#include <epicsExport.h>
#endif
#include "require.h"
int requireDebug;
#if defined(vxWorks)
#ifndef OS_CLASS
#define OS_CLASS "vxWorks"
#endif
#include <symLib.h>
#include <sysSymTbl.h>
#include <loadLib.h>
#include <shellLib.h>
#include <ioLib.h>
#include <fioLib.h>
#include <envLib.h>
#include <epicsAssert.h>
#include "strdup.h"
#include "asprintf.h"
#define HMODULE MODULE_ID
#define PREFIX
#define INFIX "Lib"
#define EXT ".munch"
#if _WRS_VXWORKS_MAJOR*10+_WRS_VXWORKS_MINOR*1+_WRS_VXWORKS_MAINT < 69
#define FUNCTYPE (FUNCPTR)
#define getAddress(module, name) __extension__ \
({SYM_TYPE t; char* a = NULL; symFindByName(sysSymTbl, (name), &a, &t); a;})
#else
#define FUNCTYPE
#define getAddress(module, name) \
({SYMBOL_DESC s={SYM_FIND_BY_NAME, (name), 0, 0, 0, 0}; symFind(sysSymTbl, &s); s.value;})
#endif
#ifndef _WRS_VXWORKS_MAJOR
/* vxWorks 5 has no snprintf() */
struct outStr_s {
char *str;
int free;
};
static STATUS outRoutine(char *buffer, int nchars, int outarg) {
struct outStr_s *poutStr = (struct outStr_s *) outarg;
int free = poutStr->free;
if (free < 1) { /*let fioFormatV continue to count length*/
return OK;
} else if (free > 1) {
if (nchars >= free) nchars = free-1;
strncpy(poutStr->str, buffer, nchars);
poutStr->str += nchars;
poutStr->free -= nchars;
}
/*make sure final string is null terminated*/
*poutStr->str = 0;
return OK;
}
static int snprintf(char *str, size_t size, const char *format, ...)
{
struct outStr_s outStr;
int nchars;
va_list ap;
outStr.str = str;
outStr.free = size;
va_start(ap, format);
nchars = fioFormatV(format, ap, outRoutine, (int)&outStr);
va_end(ap);
return nchars;
}
#endif
/* vxWorks has no realpath() -- at least make directory absolute */
static char* realpath(const char* path, char* buf)
{
size_t len = 0;
if (!buf) buf = malloc(PATH_MAX+1);
if (!buf) return NULL;
if (path[0] != '/')
{
getcwd(buf, PATH_MAX);
len = strlen(buf);
if (len && buf[len-1] != '/')
buf[len++] = '/';
}
strcpy(buf+len, path);
return buf;
}
#elif defined(UNIX)
#ifndef OS_CLASS
#ifdef __linux
#define OS_CLASS "Linux"
#endif
#ifdef SOLARIS
#define OS_CLASS "solaris"
#endif
#ifdef __rtems__
#define OS_CLASS "RTEMS"
#endif
#ifdef CYGWIN32
#define OS_CLASS "cygwin32"
#endif
#ifdef freebsd
#define OS_CLASS "freebsd"
#endif
#ifdef darwin
#define OS_CLASS "Darwin"
#endif
#ifdef _AIX32
#define OS_CLASS "AIX"
#endif
#endif
#include <unistd.h>
#include <dlfcn.h>
#define HMODULE void *
#define getAddress(module, name) dlsym(module, name)
#ifdef CYGWIN32
#define PREFIX
#define INFIX
#define EXT ".dll"
#elif defined(darwin)
#define PREFIX "lib"
#define INFIX
#define EXT ".dylib"
#else
#define PREFIX "lib"
#define INFIX
#define EXT ".so"
#endif
#elif defined (_WIN32)
#ifndef OS_CLASS
#define OS_CLASS "WIN32"
#endif
#include <windows.h>
#include <direct.h>
#include <Psapi.h>
#pragma comment(lib, "kernel32.lib")
#pragma comment(lib, "psapi.lib")
#include "asprintf.h"
#define getcwd _getcwd
#define snprintf _snprintf
#define setenv(name,value,overwrite) _putenv_s(name,value)
#define PATH_MAX MAX_PATH
#define PREFIX
#define INFIX
#define EXT ".dll"
#define getAddress(module, name) GetProcAddress(module, name)
static char* realpath(const char* path, char* buffer)
{
int len = MAX_PATH;
char *p;
if (buffer == NULL)
{
len = GetFullPathName(path, 0, NULL, NULL);
if (len == 0) return NULL;
buffer = malloc(len);
if (buffer == NULL) return NULL;
}
GetFullPathName(path, len, buffer, NULL);
/* convert '\' to '/' */
p = buffer;
while ((p = strchr(p, '\\')) != NULL) *p = '/';
return buffer;
}
#else
#warning unknown OS
#define PREFIX
#define INFIX
#define EXT
#define getAddress(module, name) NULL
#endif
/* for readdir: Windows or Posix */
#if defined(_WIN32)
#define DIR_HANDLE HANDLE
#define DIR_ENTRY WIN32_FIND_DATA
#define IF_OPEN_DIR(f) if(snprintf(f+modulediroffs, sizeof(f)-modulediroffs, "\\*.*"), (dir=FindFirstFile(filename, &direntry)) != INVALID_HANDLE_VALUE || (FindClose(dir), 0))
#define START_DIR_LOOP do
#define END_DIR_LOOP while(FindNextFile(dir,&direntry)); FindClose(dir);
#define SKIP_NON_DIR(e) if (!(e.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) || (e.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)) continue;
#define FILENAME(e) e.cFileName
#else
#include <dirent.h>
#define DIR_HANDLE DIR*
#define IF_OPEN_DIR(f) if ((dir = opendir(f)))
#define DIR_ENTRY struct dirent*
#define START_DIR_LOOP while ((errno = 0, direntry = readdir(dir)) != NULL)
#define END_DIR_LOOP if (!direntry && errno) fprintf(stderr, "error reading directory %s: %s\n", filename, strerror(errno)); if (dir) closedir(dir);
#ifdef _DIRENT_HAVE_D_TYPE
#define SKIP_NON_DIR(e) if (e->d_type != DT_DIR && e->d_type != DT_UNKNOWN) continue;
#else
#define SKIP_NON_DIR(e)
#endif
#define FILENAME(e) e->d_name
#endif
#define LIBDIR "lib"
#define TEMPLATEDIR "db"
#define TOSTR(s) TOSTR2(s)
#define TOSTR2(s) #s
#ifndef EPICSVERSION
#error EPICSVERSION not defined: Compile with USR_CFLAGS += -DEPICSVERSION='"${EPICSVERSION}"'
#endif
const char epicsRelease[] = EPICSVERSION;
const char epicsBasetype[] = TOSTR(EPICS_VERSION)"."TOSTR(EPICS_REVISION);
#ifndef T_A
#error T_A not defined: Compile with USR_CFLAGS += -DT_A='"${T_A}"'
#endif
const char targetArch[] = T_A;
#ifndef OS_CLASS
#error OS_CLASS not defined: Try to compile with USR_CFLAGS += -DOS_CLASS='"${OS_CLASS}"'
#endif
const char osClass[] = OS_CLASS;
/* loadlib (library)
Find a loadable library by name and load it.
*/
static HMODULE loadlib(const char* libname)
{
HMODULE libhandle = NULL;
if (libname == NULL)
{
fprintf (stderr, "missing library name\n");
return NULL;
}
#if defined (UNIX)
if ((libhandle = dlopen(libname, RTLD_NOW|RTLD_GLOBAL)) == NULL)
{
fprintf (stderr, "Loading %s library failed: %s\n",
libname, dlerror());
}
#elif defined (_WIN32)
{
char *p;
char *libpath = strdup(libname);
if ((p = strrchr(libpath, '/')) != NULL)
*p = '\0';
SetDllDirectory(libpath);
if ((libhandle = LoadLibrary(libname)) == NULL)
{
LPSTR lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
fprintf (stderr, "Loading %s library failed: %s\n",
libname, lpMsgBuf);
LocalFree(lpMsgBuf);
}
free(libpath);
SetDllDirectory(NULL);
}
#elif defined (vxWorks)
{
int fd, loaderror;
fd = open(libname, O_RDONLY, 0);
loaderror = errno;
if (fd >= 0)
{
errno = 0;
libhandle = loadModule(fd, LOAD_GLOBAL_SYMBOLS);
#ifndef _WRS_VXWORKS_MAJOR
/* vxWorks 5 */
if (errno == S_symLib_SYMBOL_NOT_FOUND)
{
libhandle = NULL;
}
#endif
loaderror = errno;
close (fd);
}
if (libhandle == NULL)
{
fprintf(stderr, "Loading %s library failed: %s\n",
libname, strerror(loaderror));
}
}
#else
fprintf (stderr, "cannot load libraries on this OS.\n");
#endif
return libhandle;
}
typedef struct moduleitem
{
struct moduleitem* next;
char content[0];
} moduleitem;
static moduleitem* loadedModules = NULL;
static unsigned long moduleCount = 0;
static size_t moduleListBufferSize = 1;
static size_t maxModuleNameLength = 0;
static size_t maxVersionLength = 0;
static size_t maxLocationLength = 0;
int putenvprintf(const char* format, ...)
{
va_list ap;
char *var;
char *val;
int status = 0;
if (!format) return -1;
va_start(ap, format);
if (vasprintf(&var, format, ap) < 0)
{
perror("require putenvprintf");
return errno;
}
va_end(ap);
if (requireDebug)
printf("require: putenv(\"%s\")\n", var);
val = strchr(var, '=');
if (!val)
{
fprintf(stderr, "putenvprintf: string contains no =: %s\n", var);
status = -1;
}
else
{
#ifdef vxWorks
if (putenv(var) != 0) /* vxWorks putenv() makes a copy */
{
perror("require putenvprintf: putenv failed");
status = errno;
}
#else
*val++ = 0;
if (setenv(var, val, 1) != 0)
{
perror("require putenvprintf: setenv failed");
status = errno;
}
#endif
}
free(var);
return status;
}
void pathAdd(const char* varname, const char* dirname)
{
char* old_path;
if (!varname || !dirname) {
fprintf(stderr, "usage: pathAdd \"ENVIRONMENT_VARIABLE\",\"directory\"\n");
fprintf(stderr, " Adds or moves the directory to the front of the ENVIRONMENT_VARIABLE\n");
fprintf(stderr, " but after a leading \".\".\n");
return;
}
/* add directory to front */
old_path = getenv(varname);
if (old_path == NULL)
putenvprintf("%s=." OSI_PATH_LIST_SEPARATOR "%s", varname, dirname);
else
{
size_t len = strlen(dirname);
char* p;
/* skip over "." at the beginning */
if (old_path[0] == '.' && old_path[1] == OSI_PATH_LIST_SEPARATOR[0])
old_path += 2;
/* If directory is already in path, move it to front */
p = old_path;
while ((p = strstr(p, dirname)) != NULL)
{
if ((p == old_path || *(p-1) == OSI_PATH_LIST_SEPARATOR[0]) &&
(p[len] == 0 || p[len] == OSI_PATH_LIST_SEPARATOR[0]))
{
if (p == old_path) break; /* already at front, nothing to do */
memmove(old_path+len+1, old_path, p-old_path-1);
strcpy(old_path, dirname);
old_path[len] = OSI_PATH_LIST_SEPARATOR[0];
if (requireDebug)
printf("require: modified %s=%s\n", varname, old_path);
break;
}
p += len;
}
if (p == NULL)
/* add new directory to the front (after "." )*/
putenvprintf("%s=." OSI_PATH_LIST_SEPARATOR "%s" OSI_PATH_LIST_SEPARATOR "%s",
varname, dirname, old_path);
}
}
static int setupDbPath(const char* module, const char* dbdir)
{
char* absdir = realpath(dbdir, NULL); /* so we can change directory later safely */
if (absdir == NULL)
{
if (requireDebug)
printf("require: cannot resolve %s\n", dbdir);
return -1;
}
if (requireDebug)
printf("require: found template directory %s\n", absdir);
/* set up db search path environment variables
<module>_TEMPLATES template path of <module>
<module>_DB template path of <module>
TEMPLATES template path of the current module (overwritten)
EPICS_DB_INCLUDE_PATH template path of all loaded modules (last in front after ".")
*/
putenvprintf("%s_DB=%s/", module, absdir);
putenvprintf("%s_TEMPLATES=%s/", module, absdir);
putenvprintf("TEMPLATES=%s/", absdir);
pathAdd("EPICS_DB_INCLUDE_PATH", absdir);
free(absdir);
return 0;
}
static int getRecordHandle(const char* namepart, short type, size_t minsize, DBADDR* paddr)
{
char recordname[PVNAME_STRINGSZ];
long dummy, offset;
sprintf(recordname, "%.*s%s", (int)(PVNAME_STRINGSZ-strlen(namepart)-1), getenv("IOC"), namepart);
if (dbNameToAddr(recordname, paddr) != 0)
{
if (requireDebug)
fprintf(stderr, "require: record %s not found\n",
recordname);
return -1;
}
if (paddr->field_type != type)
{
fprintf(stderr, "require: record %s has wrong type %s instead of %s\n",
recordname, pamapdbfType[paddr->field_type].strvalue, pamapdbfType[type].strvalue);
return -1;
}
if ((size_t)paddr->no_elements < minsize)
{
fprintf(stderr, "require: record %s has not enough elements: %lu instead of %lu\n",
recordname, paddr->no_elements, (unsigned long)minsize);
return -1;
}
if (paddr->pfield == NULL)
{
fprintf(stderr, "require: record %s has not yet allocated memory\n",
recordname);
return -1;
}
/* update array information */
dbGetRset(paddr)->get_array_info(paddr, &dummy, &offset);
return 0;
}
/*
We can fill the records only after they have been initialized, at initHookAfterFinishDevSup.
But use double indirection here because in 3.13 we must
wait until initHooks is loaded before we can register the hook.
*/
static void fillModuleListRecord(initHookState state)
{
if (state == initHookAfterFinishDevSup) /* MODULES record exists and has allocated memory */
{
DBADDR modules, versions, modver, origin;
int have_modules, have_versions, have_modver;
moduleitem *m;
int i = 0;
long c = 0;
char originName[PVNAME_STRINGSZ];
if (requireDebug)
printf("require: fillModuleListRecord\n");
have_modules = (getRecordHandle(":MODULES", DBF_STRING, moduleCount, &modules) == 0);
have_versions = (getRecordHandle(":VERSIONS", DBF_STRING, moduleCount, &versions) == 0);
moduleListBufferSize += moduleCount * maxModuleNameLength;
have_modver = (getRecordHandle(":MOD_VER", DBF_CHAR, moduleListBufferSize, &modver) == 0);
for (m = loadedModules, i = 0; m; m=m->next, i++)
{
size_t lm = strlen(m->content)+1;
size_t lv = strlen(m->content+lm)+1;
size_t ll = strlen(m->content+lm+lv)+1;
size_t lo = strlen(m->content+lm+lv+ll)+1;
if (have_modules)
{
if (requireDebug)
printf("require: %s[%d] = \"%.*s\"\n",
modules.precord->name, i,
MAX_STRING_SIZE-1, m->content);
sprintf((char*)(modules.pfield) + i * MAX_STRING_SIZE, "%.*s",
MAX_STRING_SIZE-1, m->content);
}
if (have_versions)
{
if (requireDebug)
printf("require: %s[%d] = \"%.*s\"\n",
versions.precord->name, i,
MAX_STRING_SIZE-1, m->content+lm);
sprintf((char*)(versions.pfield) + i * MAX_STRING_SIZE, "%.*s",
MAX_STRING_SIZE-1, m->content+lm);
}
if (have_modver)
{
if (requireDebug)
printf("require: %s+=\"%-*s%s\"\n",
modver.precord->name,
(int)maxModuleNameLength, m->content, m->content+lm);
c += sprintf((char*)(modver.pfield) + c, "%-*s%s\n",
(int)maxModuleNameLength, m->content, m->content+lm);
}
sprintf(originName, ":%.*s_ORIGIN", (int)(PVNAME_STRINGSZ-9), m->content);
if (getRecordHandle(originName, DBF_CHAR, lo, &origin) == 0)
{
strncpy(origin.pfield, m->content+lm+lv+ll, lo);
dbGetRset(&origin)->put_array_info(&origin, (int)lo);
}
}
if (have_modules) dbGetRset(&modules)->put_array_info(&modules, i);
if (have_versions) dbGetRset(&versions)->put_array_info(&versions, i);
if (have_modver) dbGetRset(&modver)->put_array_info(&modver, c+1);
}
}
static off_t fileSize(const char* filename)
{
struct stat filestat;
if (stat(
#ifdef vxWorks
(char*) /* vxWorks has buggy stat prototype */
#endif
filename, &filestat) != 0)
{
if (requireDebug)
printf("require: %s does not exist\n", filename);
return -1;
}
switch (filestat.st_mode & S_IFMT)
{
case S_IFREG:
if (requireDebug)
printf("require: file %s exists, size %llu bytes\n",
filename, (unsigned long long)filestat.st_size);
return filestat.st_size;
case S_IFDIR:
if (requireDebug)
printf("require: directory %s exists\n",
filename);
return 0;
default:
if (requireDebug)
printf("require: %s is a special file type\n",
filename);
return -1;
}
}
#define fileExists(filename) (fileSize(filename)>=0)
#define fileNotEmpty(filename) (fileSize(filename)>0)
void registerModule(const char* module, const char* version, const char* location)
{
moduleitem *m, **pm;
size_t lm = strlen(module) + 1;
size_t lv = (version ? strlen(version) : 0) + 1;
size_t ll = 1;
char* abslocation = NULL;
char* argstring = NULL;
int addSlash=0;
const char *mylocation;
static int firstTime = 1;
off_t originSize = 0;
char* originStr = NULL;
if (requireDebug)
printf("require: registerModule(%s,%s,%s)\n", module, version, location);
if (firstTime)
{
#ifdef EPICS_3_13
int (*initHookRegister)() = NULL;
SYM_TYPE type;
symFindByName(sysSymTbl, "initHookRegister", (char**)&initHookRegister, &type);
if (initHookRegister)
#endif
{
initHookRegister(fillModuleListRecord);
if (requireDebug)
printf("require: initHookRegister\n");
}
firstTime = 0;
}
if (!version) version="";
if (location)
{
/* see if we get an origin string */
char* originFileName = NULL;
if (asprintf(&originFileName, "%sORIGIN", location) > 0) {
originSize = fileSize(originFileName);
if (originSize > 0) {
FILE* originFile = fopen(originFileName, "r");
if (originFile) {
originStr = malloc(originSize + 1);
if (originStr)
fgets(originStr, originSize, originFile);
fclose(originFile);
} else {
perror(originFileName);
}
} else {
originSize = 0;
}
free(originFileName);
}
abslocation = realpath(location, NULL);
if (!abslocation) abslocation = (char*)location;
ll = strlen(abslocation) + 1;
/* linux realpath removes trailing slash */
if (abslocation[ll-2] != '/')
{
addSlash = 1;
}
}
m = (moduleitem*) calloc(1, sizeof(moduleitem) + lm + lv + ll + addSlash + originSize + 1);
if (m == NULL)
{
fprintf(stderr, "require: out of memory\n");
return;
}
m->next = NULL;
strcpy (m->content, module);
strcpy (m->content+lm, version);
strcpy (m->content+lm+lv, abslocation ? abslocation : "");
if (addSlash) strcpy (m->content+lm+lv+ll-1, "/");
if (originStr) strcpy (m->content+lm+lv+ll+addSlash, originStr);
free(originStr);
if (abslocation != location) free(abslocation);
for (pm = &loadedModules; *pm != NULL; pm = &(*pm)->next);
*pm = m;
if (lm > maxModuleNameLength) maxModuleNameLength = lm;
if (lv > maxVersionLength) maxVersionLength = lv;
if (ll > maxLocationLength) maxLocationLength = ll;
moduleListBufferSize += lv;
moduleCount++;
putenvprintf("MODULE=%s", module);
putenvprintf("%s_VERSION=%s", module, version);
if (location)
{
putenvprintf("MODULE_DIR=%s", m->content+lm+lv);
putenvprintf("%s_DIR=%s", module, m->content+lm+lv);
pathAdd("SCRIPT_PATH", m->content+lm+lv);
}
/* only do registration register stuff at init */
if (interruptAccept) return;
/* create a record with the version string */
mylocation = getenv("require_DIR");
if (mylocation == NULL) return;
if (asprintf(&abslocation, "%s/db/moduleversion.template", mylocation) < 0) return;
if (asprintf(&argstring, "IOC=%.30s, MODULE=%.24s, VERSION=%.39s, MODULE_COUNT=%lu, BUFFER_SIZE=%lu, ORIGIN_SIZE=%ld",
getenv("IOC"), module, version, moduleCount,
moduleListBufferSize+maxModuleNameLength*moduleCount, (long)originSize) < 0) return;
printf("Loading module info records for %s\n", module);
dbLoadRecords(abslocation, argstring);
free(argstring);
free(abslocation);
}
#if defined (vxWorks)
static BOOL findLibRelease (
char *name, /* symbol name */
char* val, /* value of symbol */
SYM_TYPE type, /* symbol type */
int arg, /* user-supplied arg */
UINT16 group /* group number */
) {
/* find symbols with a name like "_<module>LibRelease" */
char* module;
size_t lm;
if (name[0] != '_') return TRUE;
lm = strlen(name);
if (lm <= 10) /* strlen("LibRelease") */ return TRUE;
lm -= 10;
if (strcmp(name+lm, "LibRelease") != 0) return TRUE;
module = strdup(name+1); /* remove '_' */
module[lm-1]=0; /* remove "libRelase" */
if (getLibVersion(module) == NULL)
registerModule(module, val, NULL);
free(module);
return TRUE;
}
void registerExternalModules()
{
/* iterate over all symbols */
symEach(sysSymTbl, FUNCTYPE findLibRelease, 0);
}
#elif defined (__linux)
/* This is the Linux link.h, not the EPICS link.h ! */
#include <link.h>
static int findLibRelease (
struct dl_phdr_info *info, /* shared library info */
size_t size, /* size of info structure */
void *data /* user-supplied arg */
) {
void *handle;
char* location = NULL;
char* p;
char* version;
char* symname;
char name[PATH_MAX + 11]; /* get space for library path + "LibRelease" */
(void)data; /* unused */
if (size < sizeof(struct dl_phdr_info)) return 0; /* wrong version of struct dl_phdr_info */
/* find a symbol with a name like "_<module>LibRelease"
where <module> is from the library name "<location>/lib<module>.so" */
if (info->dlpi_name == NULL || info->dlpi_name[0] == 0) return 0; /* no library name */
strcpy(name, info->dlpi_name); /* get a modifiable copy of the library name */
handle = dlopen(info->dlpi_name, RTLD_LAZY); /* re-open already loaded library */
p = strrchr(name, '/'); /* find file name part in "<location>/lib<module>.so" */
if (p) {location = name; *++p=0;} else p=name; /* terminate "<location>/" (if exists) */
*(symname = p+2) = '_'; /* replace "lib" with "_" */
p = strchr(symname, '.'); /* find ".so" extension */
if (p == NULL) p = symname + strlen(symname); /* no file extension ? */
strcpy(p, "LibRelease"); /* append "LibRelease" to module name */
version = dlsym(handle, symname); /* find symbol "_<module>LibRelease" */
if (version)
{
*p=0; symname++; /* get "<module>" from "_<module>LibRelease" */
if ((p = strstr(name, "/" LIBDIR "/" )) != NULL) p[1]=0; /* cut "<location>" before LIBDIR */
if (getLibVersion(symname) == NULL)
registerModule(symname, version, location);
}
dlclose(handle);
return 0;
}
static void registerExternalModules()
{
/* iterate over all loaded libraries */
dl_iterate_phdr(findLibRelease, NULL);
}
#elif defined (_WIN32)
static void registerExternalModules()
{
HMODULE hMods[100];
HANDLE hProcess = GetCurrentProcess();
DWORD cbNeeded;
char* location = NULL;
char* p;
char* version;
char* symname;
unsigned int i;
char name [MAX_PATH+11]; /* get space for library path + "LibRelease" */
/* iterate over all loaded libraries */
if (!EnumProcessModules(hProcess, hMods, sizeof(hMods), &cbNeeded)) return;
for (i = 0; i < (cbNeeded / sizeof(HMODULE)); i++)
{
/* Get the full path to the module's file. */
if (!GetModuleFileName(hMods[i], name, MAX_PATH)) continue; /* no library name */
name[sizeof(name)-1] = 0; /* WinXP may not terminate the string */
p = strrchr(name, '\\'); /* find file name part in "<location>/<module>.dll" */
if (p) { location = name; p++; } else p=name; /* find end of "<location>\\" (if exists) */
symname = p;
p = strchr(symname, '.'); /* find ".dll" */
if (p == NULL) p = symname + strlen(symname); /* no file extension ? */
memmove(symname+2, symname, p - symname); /* make room for 0 and '_' */
*symname++ = 0; /* terminate "<location>/" */
*symname = '_'; /* prefix module name with '_' */
strcpy((p+=2), "LibRelease"); /* append "LibRelease" to module name */
version = (char*)GetProcAddress(hMods[i], symname); /* find symbol "_<module>LibRelease" */
if (version)
{
*p=0; symname++; /* get "<module>" from "_<module>LibRelease" */
if ((p = strstr(name, "\\" LIBDIR "\\")) != NULL) p[1]=0; /* cut "<location>" before LIBDIR */
if (getLibVersion(symname) == NULL)
registerModule(symname, version, location);
}
}
}
#elif defined (darwin)
#include <mach-o/dyld.h>
static void registerExternalModules()
{
void *handle;
const char *image_name;
char* location = NULL;
char* p;
char* version;
char* symname;
unsigned int i;
char name[PATH_MAX + 11]; /* get space for library path + "LibRelease" */
for (i=0; i < _dyld_image_count(); i++) {
image_name = _dyld_get_image_name(i);
if (image_name == NULL) continue; /* no library name */
strcpy(name, image_name); /* get a modifiable copy of the library name */
handle = dlopen(image_name, RTLD_LAZY); /* re-open already loaded library */
p = strrchr(name, '/'); /* find file name part in "<location>/lib<module>.dylib" */
if (p) {location = name; *++p=0;} else p=name; /* terminate "<location>/" (if exists) */
*(symname = p+2) = '_'; /* replace "lib" with "_" */
p = strchr(symname, '.'); /* find ".dylib" extension */
if (p == NULL) p = symname + strlen(symname); /* no file extension ? */
strcpy(p, "LibRelease"); /* append "LibRelease" to module name */
version = dlsym(handle, symname); /* find symbol "_<module>LibRelease" */
if (version)
{
*p=0; symname++; /* get "<module>" from "_<module>LibRelease" */
if ((p = strstr(name, "/" LIBDIR "/" )) != NULL) p[1]=0; /* cut "<location>" before LIBDIR */
if (getLibVersion(symname) == NULL)
registerModule(symname, version, location);
}
dlclose(handle);
}
}
#else
static void registerExternalModules()
{
;
}
#endif
size_t foreachLoadedLib(size_t (*func)(const char* name, const char* version, const char* path, void* arg), void* arg)
{
moduleitem* m;
size_t result;
for (m = loadedModules; m; m=m->next)
{
const char* name = m->content;
const char* version = name + strlen(name)+1;
const char* path = version + strlen(version)+1;
result = func(name, version, path, arg);
if (result) return result;
}
return 0;
}
const char* getLibVersion(const char* libname)
{
moduleitem* m;
for (m = loadedModules; m; m=m->next)
{
if (strcmp(m->content, libname) == 0)
{
return m->content+strlen(m->content)+1;
}
}
return NULL;
}
const char* getLibLocation(const char* libname)
{
moduleitem* m;
char *v;
for (m = loadedModules; m; m=m->next)
{
if (strcmp(m->content, libname) == 0)
{
v = m->content+strlen(m->content)+1;
return v+strlen(v)+1;
}
}
return NULL;
}
int libversionShow(const char* outfile)
{
moduleitem* m;
size_t lm, lv;
FILE* out = epicsGetStdout();
if (outfile)
{
out = fopen(outfile, "w");
if (out == NULL)
{
fprintf(stderr, "can't open %s: %s\n",
outfile, strerror(errno));
return -1;
}
}