os_installation.c File Reference

#include "platform.h"
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <unistr.h>
#include "gnunet_util_lib.h"

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Macros
#define	LOG(kind, ...)    GNUNET_log_from (kind, "util-os-installation", __VA_ARGS__)
#define	LOG_STRERROR_FILE(kind, syscall, filename)

Functions
const struct GNUNET_OS_ProjectData *	GNUNET_OS_project_data_gnunet (void)
	Return default project data used by 'libgnunetutil' for GNUnet. More...
void	GNUNET_OS_init (const char *package_name, const struct GNUNET_OS_ProjectData *pd)
	Setup OS subsystem for the given project data and package. More...
static char *	get_path_from_PATH (const char *binary)
	Return the actual path to a file found in the current PATH environment variable. More...
static char *	get_path_from_GNUNET_PREFIX (const struct GNUNET_OS_ProjectData *pd)
	Try to obtain the installation path using the "GNUNET_PREFIX" environment variable. More...
static char *	os_get_gnunet_path (const struct GNUNET_OS_ProjectData *pd)
	get the path to GNUnet bin/ or lib/, preferring the lib/ path More...
static char *	os_get_exec_path (const struct GNUNET_OS_ProjectData *pd)
	get the path to current app's bin/ More...
char *	GNUNET_OS_installation_get_path (const struct GNUNET_OS_ProjectData *pd, enum GNUNET_OS_InstallationPathKind dirkind)
	Get the path to a specific GNUnet installation directory or, with GNUNET_OS_IPK_SELF_PREFIX, the current running apps installation directory. More...
char *	GNUNET_OS_get_libexec_binary_path (const struct GNUNET_OS_ProjectData *pd, const char *progname)
	Given the name of a gnunet-helper, gnunet-service or gnunet-daemon binary, try to prefix it with the libexec/-directory to get the full path. More...
char *	GNUNET_OS_get_suid_binary_path (const struct GNUNET_OS_ProjectData *pd, const struct GNUNET_CONFIGURATION_Handle *cfg, const char *progname)
	Given the name of a helper, service or daemon binary construct the full path to the binary using the SUID_BINARY_PATH in the PATHS section of the configuration. More...
enum GNUNET_GenericReturnValue	GNUNET_OS_check_helper_binary (const char *binary, bool check_suid, const char *params)
	Check whether an executable exists and possibly if the suid bit is set on the file. More...

Variables
static const struct GNUNET_OS_ProjectData	default_pd
	Default project data used for installation path detection for GNUnet (core). More...

Macro Definition Documentation

LOG

#define LOG	(		kind,
			...
	)		GNUNET_log_from (kind, "util-os-installation", __VA_ARGS__)

Definition at line 46 of file os_installation.c.

LOG_STRERROR_FILE

#define LOG_STRERROR_FILE	(		kind,
			syscall,
			filename
	)

Value:

        GNUNET_log_from_strerror_file (kind,                   \
                                       "util-os-installation", \
                                       syscall,                \
                                       filename)

Definition at line 49 of file os_installation.c.

Function Documentation

get_path_from_PATH()

static char * get_path_from_PATH ( const char *  binary )

static

Return the actual path to a file found in the current PATH environment variable.

Parameters

binary

the name of the file to find

Returns

path to binary, NULL if not found

Definition at line 295 of file os_installation.c.

{
  char *path;
  char *pos;
  char *end;
  char *buf;
  const char *p;
 
  if (NULL == (p = getenv ("PATH")))
    return NULL;
 
  path = GNUNET_strdup (p);  /* because we write on it */
  buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
  pos = path;
  while (NULL != (end = strchr (pos,
                                PATH_SEPARATOR)))
  {
    *end = '\0';
    sprintf (buf,
             "%s/%s",
             pos,
             binary);
    if (GNUNET_YES ==
        GNUNET_DISK_file_test (buf))
    {
      pos = GNUNET_strdup (pos);
      GNUNET_free (buf);
      GNUNET_free (path);
      return pos;
    }
    pos = end + 1;
  }
  sprintf (buf,
           "%s/%s",
           pos,
           binary);
  if (GNUNET_YES ==
      GNUNET_DISK_file_test (buf))
  {
    pos = GNUNET_strdup (pos);
    GNUNET_free (buf);
    GNUNET_free (path);
    return pos;
  }
  GNUNET_free (buf);
  GNUNET_free (path);
  return NULL;
}

References end, getenv(), GNUNET_DISK_file_test(), GNUNET_free, GNUNET_malloc, GNUNET_strdup, GNUNET_YES, p, and PATH_SEPARATOR.

Referenced by GNUNET_OS_check_helper_binary(), and os_get_gnunet_path().

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get_path_from_GNUNET_PREFIX()

static char * get_path_from_GNUNET_PREFIX ( const struct GNUNET_OS_ProjectData *  pd )

static

Try to obtain the installation path using the "GNUNET_PREFIX" environment variable.

Parameters

pd	project data to use to determine paths

Returns

NULL on error (environment variable not set)

Definition at line 353 of file os_installation.c.

{
  const char *p;
 
  if ((NULL != pd->env_varname) &&
      (NULL != (p = getenv (pd->env_varname))))
    return GNUNET_strdup (p);
  if ((NULL != pd->env_varname_alt) &&
      (NULL != (p = getenv (pd->env_varname_alt))))
    return GNUNET_strdup (p);
  return NULL;
}

References GNUNET_OS_ProjectData::env_varname, GNUNET_OS_ProjectData::env_varname_alt, getenv(), GNUNET_strdup, and p.

Referenced by os_get_gnunet_path().

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os_get_gnunet_path()

static char * os_get_gnunet_path ( const struct GNUNET_OS_ProjectData *  pd )

static

get the path to GNUnet bin/ or lib/, preferring the lib/ path

Author

Milan

Parameters

pd	project data to use to determine paths

Returns

a pointer to the executable path, or NULL on error

Definition at line 375 of file os_installation.c.

{
  char *ret;
 
  if (NULL != (ret = get_path_from_GNUNET_PREFIX (pd)))
    return ret;
#ifdef __linux__
  if (NULL != (ret = get_path_from_proc_maps (pd)))
    return ret;
  /* try path *first*, before /proc/exe, as /proc/exe can be wrong */
  if ((NULL != pd->binary_name) &&
      (NULL != (ret = get_path_from_PATH (pd->binary_name))))
    return ret;
  if (NULL != (ret = get_path_from_proc_exe (pd)))
    return ret;
#endif
#if DARWIN
  if (NULL != (ret = get_path_from_dyld_image ()))
    return ret;
  if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
    return ret;
#endif
  if ((NULL != pd->binary_name) &&
      (NULL != (ret = get_path_from_PATH (pd->binary_name))))
    return ret;
  /* other attempts here */
  LOG (GNUNET_ERROR_TYPE_ERROR,
       "Could not determine installation path for %s.  Set `%s' environment variable.\n",
       pd->project_dirname,
       pd->env_varname);
  return NULL;
}

References GNUNET_OS_ProjectData::binary_name, GNUNET_OS_ProjectData::env_varname, get_path_from_GNUNET_PREFIX(), get_path_from_PATH(), GNUNET_ERROR_TYPE_ERROR, LOG, GNUNET_OS_ProjectData::project_dirname, and ret.

Referenced by GNUNET_OS_installation_get_path().

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os_get_exec_path()

static char * os_get_exec_path ( const struct GNUNET_OS_ProjectData *  pd )

static

get the path to current app's bin/

Parameters

pd	project data to use to determine paths

Returns

a pointer to the executable path, or NULL on error

Definition at line 416 of file os_installation.c.

{
  char *ret = NULL;
 
#ifdef __linux__
  if (NULL != (ret = get_path_from_proc_exe (pd)))
    return ret;
#endif
#if DARWIN
  if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
    return ret;
#endif
  /* other attempts here */
  return ret;
}

References ret.

Referenced by GNUNET_OS_installation_get_path().

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Variable Documentation

default_pd

const struct GNUNET_OS_ProjectData default_pd

static

Initial value:

= {
  .libname = "libgnunetutil",
  .project_dirname = "gnunet",
  .binary_name = "gnunet-arm",
  .version = PACKAGE_VERSION,
  .env_varname = "GNUNET_PREFIX",
  .base_config_varname = "GNUNET_BASE_CONFIG",
  .bug_email = "gnunet-developers@gnu.org",
  .homepage = "http://www.gnu.org/s/gnunet/",
  .config_file = "gnunet.conf",
  .user_config_file = "~/.config/gnunet.conf",
  .is_gnu = 1,
  .gettext_domain = "gnunet",
  .gettext_path = NULL,
  .agpl_url = GNUNET_AGPL_URL,
}

Default project data used for installation path detection for GNUnet (core).

Definition at line 60 of file os_installation.c.

Referenced by GNUNET_OS_project_data_gnunet().