1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002-2006 the VideoLAN team
7 * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
10 * Derk-Jan Hartman <hartman at videolan dot org>
11 * Christophe Massiot <massiot@via.ecp.fr>
12 * Rémi Denis-Courmont <rem à videolan.org>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
27 *****************************************************************************/
42 #if defined(HAVE_ICONV)
55 # include <sys/time.h>
58 # include <sys/wait.h>
60 # include <sys/socket.h>
61 # include <sys/poll.h>
64 #if defined(WIN32) || defined(UNDER_CE)
69 # define WIN32_LEAN_AND_MEAN
74 # define strcoll strcmp
77 /*****************************************************************************
78 * getenv: just in case, but it should never be called
79 *****************************************************************************/
80 #if !defined( HAVE_GETENV )
81 char *vlc_getenv( const char *name )
87 /*****************************************************************************
88 * strdup: returns a malloc'd copy of a string
89 *****************************************************************************/
90 #if !defined( HAVE_STRDUP )
91 char *vlc_strdup( const char *string )
93 return strndup( string, strlen( string ) );
97 /*****************************************************************************
98 * strndup: returns a malloc'd copy of at most n bytes of string
99 * Does anyone know whether or not it will be present in Jaguar?
100 *****************************************************************************/
101 #if !defined( HAVE_STRNDUP )
102 char *vlc_strndup( const char *string, size_t n )
105 size_t len = strlen( string );
107 len = __MIN( len, n );
108 psz = (char*)malloc( len + 1 );
111 memcpy( (void*)psz, (const void*)string, len );
119 /*****************************************************************************
121 *****************************************************************************/
122 #if !defined( HAVE_STRNLEN )
123 size_t vlc_strnlen( const char *psz, size_t n )
125 const char *psz_end = memchr( psz, 0, n );
126 return psz_end ? (size_t)( psz_end - psz ) : n;
130 /*****************************************************************************
131 * strcasecmp: compare two strings ignoring case
132 *****************************************************************************/
133 #if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
134 int vlc_strcasecmp( const char *s1, const char *s2 )
137 if( !s1 || !s2 ) return -1;
144 if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
148 if( !*s1 && !*s2 ) return 0;
149 else return (*s1 ? 1 : -1);
153 /*****************************************************************************
154 * strncasecmp: compare n chars from two strings ignoring case
155 *****************************************************************************/
156 #if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
157 int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
160 if( !s1 || !s2 ) return -1;
162 while( n > 0 && *s1 && *s2 )
167 if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
171 if( !n || (!*s1 && !*s2) ) return 0;
172 else return (*s1 ? 1 : -1);
176 /******************************************************************************
177 * strcasestr: find a substring (little) in another substring (big)
178 * Case sensitive. Return NULL if not found, return big if little == null
179 *****************************************************************************/
180 #if !defined( HAVE_STRCASESTR ) && !defined( HAVE_STRISTR )
181 char * vlc_strcasestr( const char *psz_big, const char *psz_little )
183 char *p_pos = (char *)psz_big;
185 if( !psz_big || !psz_little || !*psz_little ) return p_pos;
189 if( toupper( *p_pos ) == toupper( *psz_little ) )
191 char * psz_cur1 = p_pos + 1;
192 char * psz_cur2 = (char *)psz_little + 1;
193 while( *psz_cur1 && *psz_cur2 &&
194 toupper( *psz_cur1 ) == toupper( *psz_cur2 ) )
199 if( !*psz_cur2 ) return p_pos;
207 /*****************************************************************************
209 *****************************************************************************/
210 #if !defined(HAVE_VASPRINTF) || defined(__APPLE__) || defined(SYS_BEOS)
211 int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
213 /* Guess we need no more than 100 bytes. */
215 char *p = malloc( i_size );
226 /* Try to print in the allocated space. */
227 n = vsnprintf( p, i_size, fmt, ap );
229 /* If that worked, return the string. */
230 if (n > -1 && n < i_size)
235 /* Else try again with more space. */
236 if (n > -1) /* glibc 2.1 */
238 i_size = n+1; /* precisely what is needed */
242 i_size *= 2; /* twice the old size */
244 if( (p = realloc( p, i_size ) ) == NULL)
253 /*****************************************************************************
255 *****************************************************************************/
256 #if !defined(HAVE_ASPRINTF) || defined(__APPLE__) || defined(SYS_BEOS)
257 int vlc_asprintf( char **strp, const char *fmt, ... )
262 va_start( args, fmt );
263 i_ret = vasprintf( strp, fmt, args );
270 /*****************************************************************************
271 * atof: convert a string to a double.
272 *****************************************************************************/
273 #if !defined( HAVE_ATOF )
274 double vlc_atof( const char *nptr )
277 wchar_t *psz_tmp = NULL;
278 int i_len = strlen( nptr ) + 1;
280 psz_tmp = malloc( i_len * sizeof(wchar_t) );
283 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
284 f_result = wcstod( psz_tmp, NULL );
291 /*****************************************************************************
292 * strtoll: convert a string to a 64 bits int.
293 *****************************************************************************/
294 #if !defined( HAVE_STRTOLL )
295 int64_t vlc_strtoll( const char *nptr, char **endptr, int base )
298 int sign = 1, newbase = base ? base : 10;
300 while( isspace(*nptr) ) nptr++;
308 /* Try to detect base */
321 if( base && newbase != base )
323 if( endptr ) *endptr = (char *)nptr;
330 while( *nptr >= '0' && *nptr <= '9' )
333 i_value += ( *nptr++ - '0' );
335 if( endptr ) *endptr = (char *)nptr;
339 while( (*nptr >= '0' && *nptr <= '9') ||
340 (*nptr >= 'a' && *nptr <= 'f') ||
341 (*nptr >= 'A' && *nptr <= 'F') )
344 if(*nptr >= '0' && *nptr <= '9') i_valc = *nptr - '0';
345 else if(*nptr >= 'a' && *nptr <= 'f') i_valc = *nptr - 'a' +10;
346 else if(*nptr >= 'A' && *nptr <= 'F') i_valc = *nptr - 'A' +10;
351 if( endptr ) *endptr = (char *)nptr;
355 i_value = strtol( nptr, endptr, newbase );
359 return i_value * sign;
363 /*****************************************************************************
364 * atoll: convert a string to a 64 bits int.
365 *****************************************************************************/
366 #if !defined( HAVE_ATOLL )
367 int64_t vlc_atoll( const char *nptr )
369 return strtoll( nptr, (char **)NULL, 10 );
373 /*****************************************************************************
374 * lldiv: returns quotient and remainder
375 *****************************************************************************/
376 #if !defined( HAVE_LLDIV )
377 lldiv_t vlc_lldiv( long long numer, long long denom )
380 d.quot = numer / denom;
381 d.rem = numer % denom;
388 * Copy a string to a sized buffer. The result is always nul-terminated
389 * (contrary to strncpy()).
391 * @param dest destination buffer
392 * @param src string to be copied
393 * @param len maximum number of characters to be copied plus one for the
396 * @return strlen(src)
399 extern size_t vlc_strlcpy (char *tgt, const char *src, size_t bufsize)
403 for (length = 1; (length < bufsize) && *src; length++)
416 /*****************************************************************************
417 * vlc_*dir_wrapper: wrapper under Windows to return the list of drive letters
418 * when called with an empty argument or just '\'
419 *****************************************************************************/
420 #if defined(WIN32) && !defined(UNDER_CE)
423 typedef struct vlc_DIR
427 struct _wdirent dd_dir;
431 void *vlc_wopendir( const wchar_t *wpath )
433 vlc_DIR *p_dir = NULL;
434 _WDIR *p_real_dir = NULL;
436 if ( wpath == NULL || wpath[0] == '\0'
437 || (wcscmp (wpath, L"\\") == 0) )
439 /* Special mode to list drive letters */
440 p_dir = malloc( sizeof(vlc_DIR) );
443 p_dir->p_real_dir = NULL;
444 p_dir->i_drives = GetLogicalDrives();
445 return (void *)p_dir;
448 p_real_dir = _wopendir( wpath );
449 if ( p_real_dir == NULL )
452 p_dir = malloc( sizeof(vlc_DIR) );
455 _wclosedir( p_real_dir );
458 p_dir->p_real_dir = p_real_dir;
460 assert (wpath[0]); // wpath[1] is defined
461 p_dir->b_insert_back = !wcscmp (wpath + 1, L":\\");
462 return (void *)p_dir;
465 struct _wdirent *vlc_wreaddir( void *_p_dir )
467 vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
471 if ( p_dir->p_real_dir != NULL )
473 if ( p_dir->b_insert_back )
475 /* Adds "..", gruik! */
476 p_dir->dd_dir.d_ino = 0;
477 p_dir->dd_dir.d_reclen = 0;
478 p_dir->dd_dir.d_namlen = 2;
479 wcscpy( p_dir->dd_dir.d_name, L".." );
480 p_dir->b_insert_back = false;
481 return &p_dir->dd_dir;
484 return _wreaddir( p_dir->p_real_dir );
487 /* Drive letters mode */
488 i_drives = p_dir->i_drives;
490 return NULL; /* end */
492 for ( i = 0; i < sizeof(DWORD)*8; i++, i_drives >>= 1 )
493 if ( i_drives & 1 ) break;
496 return NULL; /* this should not happen */
498 swprintf( p_dir->dd_dir.d_name, L"%c:\\", 'A' + i );
499 p_dir->dd_dir.d_namlen = wcslen(p_dir->dd_dir.d_name);
500 p_dir->i_drives &= ~(1UL << i);
501 return &p_dir->dd_dir;
504 int vlc_wclosedir( void *_p_dir )
506 vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
509 if ( p_dir->p_real_dir != NULL )
510 i_ret = _wclosedir( p_dir->p_real_dir );
516 void vlc_rewinddir( void *_p_dir )
518 vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
520 if ( p_dir->p_real_dir != NULL )
521 _wrewinddir( p_dir->p_real_dir );
525 /*****************************************************************************
526 * scandir: scan a directory alpha-sorted
527 *****************************************************************************/
528 #if !defined( HAVE_SCANDIR )
529 /* FIXME: I suspect this is dead code -> utf8_scandir */
535 int vlc_alphasort( const struct dirent **a, const struct dirent **b )
537 return strcoll( (*a)->d_name, (*b)->d_name );
540 int vlc_scandir( const char *name, struct dirent ***namelist,
541 int (*filter) ( const struct dirent * ),
542 int (*compar) ( const struct dirent **,
543 const struct dirent ** ) )
546 struct dirent * p_content;
547 struct dirent ** pp_list;
550 if( !namelist || !( p_dir = opendir( name ) ) ) return -1;
554 while( ( p_content = readdir( p_dir ) ) )
556 if( filter && !filter( p_content ) )
560 pp_list = realloc( pp_list, ( ret + 1 ) * sizeof( struct dirent * ) );
561 size = sizeof( struct dirent ) + strlen( p_content->d_name ) + 1;
562 pp_list[ret] = malloc( size );
565 memcpy( pp_list[ret], p_content, size );
570 /* Continuing is useless when no more memory can be allocted,
571 * so better return what we have found.
582 qsort( pp_list, ret, sizeof( struct dirent * ),
583 (int (*)(const void *, const void *)) compar );
593 * gettext callbacks for plugins.
594 * LibVLC links libintl statically on Windows.
596 char *vlc_dgettext( const char *package, const char *msgid )
598 return dgettext( package, msgid );
603 * In-tree plugins share their gettext domain with LibVLC.
605 char *vlc_gettext( const char *msgid )
607 return dgettext( PACKAGE_NAME, msgid );
610 /*****************************************************************************
611 * count_utf8_string: returns the number of characters in the string.
612 *****************************************************************************/
613 static int count_utf8_string( const char *psz_string )
615 int i = 0, i_count = 0;
616 while( psz_string[ i ] != 0 )
618 if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
624 /*****************************************************************************
625 * wraptext: inserts \n at convenient places to wrap the text.
626 * Returns the modified string in a new buffer.
627 *****************************************************************************/
628 char *vlc_wraptext( const char *psz_text, int i_line )
631 char *psz_line, *psz_new_text;
633 psz_line = psz_new_text = strdup( psz_text );
635 i_len = count_utf8_string( psz_text );
637 while( i_len > i_line )
639 /* Look if there is a newline somewhere. */
640 char *psz_parser = psz_line;
642 while( i_count <= i_line && *psz_parser != '\n' )
644 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
648 if( *psz_parser == '\n' )
650 i_len -= (i_count + 1);
651 psz_line = psz_parser + 1;
655 /* Find the furthest space. */
656 while( psz_parser > psz_line && *psz_parser != ' ' )
658 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
662 if( *psz_parser == ' ' )
665 i_len -= (i_count + 1);
666 psz_line = psz_parser + 1;
670 /* Wrapping has failed. Find the first space or newline */
671 while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
673 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
677 if( i_count < i_len ) *psz_parser = '\n';
678 i_len -= (i_count + 1);
679 psz_line = psz_parser + 1;
685 /*****************************************************************************
687 *****************************************************************************/
688 vlc_iconv_t vlc_iconv_open( const char *tocode, const char *fromcode )
690 #if defined(HAVE_ICONV)
691 return iconv_open( tocode, fromcode );
697 size_t vlc_iconv( vlc_iconv_t cd, const char **inbuf, size_t *inbytesleft,
698 char **outbuf, size_t *outbytesleft )
700 #if defined(HAVE_ICONV)
701 return iconv( cd, (ICONV_CONST char **)inbuf, inbytesleft,
702 outbuf, outbytesleft );
706 if (inbytesleft == NULL || outbytesleft == NULL)
711 i_bytes = __MIN(*inbytesleft, *outbytesleft);
712 if( !inbuf || !outbuf || !i_bytes ) return (size_t)(-1);
713 memcpy( *outbuf, *inbuf, i_bytes );
716 inbytesleft -= i_bytes;
717 outbytesleft -= i_bytes;
722 int vlc_iconv_close( vlc_iconv_t cd )
724 #if defined(HAVE_ICONV)
725 return iconv_close( cd );
731 /*****************************************************************************
733 * (adapted from libavcodec, author Michael Niedermayer <michaelni@gmx.at>)
734 *****************************************************************************/
735 bool vlc_ureduce( unsigned *pi_dst_nom, unsigned *pi_dst_den,
736 uint64_t i_nom, uint64_t i_den, uint64_t i_max )
748 i_gcd = GCD( i_nom, i_den );
752 if( i_max == 0 ) i_max = INT64_C(0xFFFFFFFF);
754 if( i_nom > i_max || i_den > i_max )
756 uint64_t i_a0_num = 0, i_a0_den = 1, i_a1_num = 1, i_a1_den = 0;
761 uint64_t i_x = i_nom / i_den;
762 uint64_t i_a2n = i_x * i_a1_num + i_a0_num;
763 uint64_t i_a2d = i_x * i_a1_den + i_a0_den;
765 if( i_a2n > i_max || i_a2d > i_max ) break;
769 i_a0_num = i_a1_num; i_a0_den = i_a1_den;
770 i_a1_num = i_a2n; i_a1_den = i_a2d;
771 if( i_nom == 0 ) break;
772 i_x = i_nom; i_nom = i_den; i_den = i_x;
784 /*************************************************************************
785 * vlc_execve: Execute an external program with a given environment,
786 * wait until it finishes and return its standard output
787 *************************************************************************/
788 int __vlc_execve( vlc_object_t *p_object, int i_argc, char *const *ppsz_argv,
789 char *const *ppsz_env, const char *psz_cwd,
790 const char *p_in, size_t i_in,
791 char **pp_data, size_t *pi_data )
793 (void)i_argc; // <-- hmph
795 # define BUFSIZE 1024
796 int fds[2], i_status;
798 if (socketpair (AF_LOCAL, SOCK_STREAM, 0, fds))
802 if ((fds[0] > 2) && (fds[1] > 2))
808 msg_Err (p_object, "unable to fork (%m)");
817 pthread_sigmask (SIG_SETMASK, &set, NULL);
820 * Like it or not, close can fail (and not only with EBADF)
822 if ((close (0) == 0) && (close (1) == 0) && (close (2) == 0)
823 && (dup (fds[1]) == 0) && (dup (fds[1]) == 1)
824 && (open ("/dev/null", O_RDONLY) == 2)
825 && ((psz_cwd == NULL) || (chdir (psz_cwd) == 0)))
826 execve (ppsz_argv[0], ppsz_argv, ppsz_env);
840 shutdown (fds[0], SHUT_WR);
842 while (!p_object->b_die)
844 struct pollfd ufd[1];
845 memset (ufd, 0, sizeof (ufd));
847 ufd[0].events = POLLIN;
850 ufd[0].events |= POLLOUT;
852 if (poll (ufd, 1, 10) <= 0)
855 if (ufd[0].revents & ~POLLOUT)
857 char *ptr = realloc (*pp_data, *pi_data + BUFSIZE + 1);
859 break; /* safely abort */
863 ssize_t val = read (fds[0], ptr + *pi_data, BUFSIZE);
868 shutdown (fds[0], SHUT_RD);
876 if (ufd[0].revents & POLLOUT)
878 ssize_t val = write (fds[0], p_in, i_in);
884 shutdown (fds[0], SHUT_WR);
896 while (waitpid (pid, &i_status, 0) == -1);
898 if (WIFEXITED (i_status))
900 i_status = WEXITSTATUS (i_status);
902 msg_Warn (p_object, "child %s (PID %d) exited with error code %d",
903 ppsz_argv[0], (int)pid, i_status);
906 if (WIFSIGNALED (i_status)) // <-- this should be redumdant a check
908 i_status = WTERMSIG (i_status);
909 msg_Warn (p_object, "child %s (PID %d) exited on signal %d (%s)",
910 ppsz_argv[0], (int)pid, i_status, strsignal (i_status));
913 #elif defined( WIN32 ) && !defined( UNDER_CE )
914 SECURITY_ATTRIBUTES saAttr;
915 PROCESS_INFORMATION piProcInfo;
916 STARTUPINFO siStartInfo;
917 BOOL bFuncRetn = FALSE;
918 HANDLE hChildStdinRd, hChildStdinWr, hChildStdoutRd, hChildStdoutWr;
920 char *psz_cmd = NULL, *p_env = NULL, *p = NULL;
924 /* Set the bInheritHandle flag so pipe handles are inherited. */
925 saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
926 saAttr.bInheritHandle = TRUE;
927 saAttr.lpSecurityDescriptor = NULL;
929 /* Create a pipe for the child process's STDOUT. */
930 if ( !CreatePipe( &hChildStdoutRd, &hChildStdoutWr, &saAttr, 0 ) )
932 msg_Err( p_object, "stdout pipe creation failed" );
936 /* Ensure the read handle to the pipe for STDOUT is not inherited. */
937 SetHandleInformation( hChildStdoutRd, HANDLE_FLAG_INHERIT, 0 );
939 /* Create a pipe for the child process's STDIN. */
940 if ( !CreatePipe( &hChildStdinRd, &hChildStdinWr, &saAttr, 0 ) )
942 msg_Err( p_object, "stdin pipe creation failed" );
946 /* Ensure the write handle to the pipe for STDIN is not inherited. */
947 SetHandleInformation( hChildStdinWr, HANDLE_FLAG_INHERIT, 0 );
949 /* Set up members of the PROCESS_INFORMATION structure. */
950 ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
952 /* Set up members of the STARTUPINFO structure. */
953 ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
954 siStartInfo.cb = sizeof(STARTUPINFO);
955 siStartInfo.hStdError = hChildStdoutWr;
956 siStartInfo.hStdOutput = hChildStdoutWr;
957 siStartInfo.hStdInput = hChildStdinRd;
958 siStartInfo.wShowWindow = SW_HIDE;
959 siStartInfo.dwFlags |= STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
961 /* Set up the command line. */
962 psz_cmd = malloc(32768);
967 ppsz_parser = &ppsz_argv[0];
968 while ( ppsz_parser[0] != NULL && i_size > 0 )
970 /* Protect the last argument with quotes ; the other arguments
971 * are supposed to be already protected because they have been
972 * passed as a command-line option. */
973 if ( ppsz_parser[1] == NULL )
975 strncat( psz_cmd, "\"", i_size );
978 strncat( psz_cmd, *ppsz_parser, i_size );
979 i_size -= strlen( *ppsz_parser );
980 if ( ppsz_parser[1] == NULL )
982 strncat( psz_cmd, "\"", i_size );
985 strncat( psz_cmd, " ", i_size );
990 /* Set up the environment. */
991 p = p_env = malloc(32768);
999 ppsz_parser = &ppsz_env[0];
1000 while ( *ppsz_parser != NULL && i_size > 0 )
1002 memcpy( p, *ppsz_parser,
1003 __MIN((int)(strlen(*ppsz_parser) + 1), i_size) );
1004 p += strlen(*ppsz_parser) + 1;
1005 i_size -= strlen(*ppsz_parser) + 1;
1010 /* Create the child process. */
1011 bFuncRetn = CreateProcess( NULL,
1012 psz_cmd, // command line
1013 NULL, // process security attributes
1014 NULL, // primary thread security attributes
1015 TRUE, // handles are inherited
1016 0, // creation flags
1019 &siStartInfo, // STARTUPINFO pointer
1020 &piProcInfo ); // receives PROCESS_INFORMATION
1025 if ( bFuncRetn == 0 )
1027 msg_Err( p_object, "child creation failed" );
1031 /* Read from a file and write its contents to a pipe. */
1032 while ( i_in > 0 && !p_object->b_die )
1035 if ( !WriteFile( hChildStdinWr, p_in, i_in, &i_written, NULL ) )
1041 /* Close the pipe handle so the child process stops reading. */
1042 CloseHandle(hChildStdinWr);
1044 /* Close the write end of the pipe before reading from the
1045 * read end of the pipe. */
1046 CloseHandle(hChildStdoutWr);
1048 /* Read output from the child process. */
1053 *pp_data = malloc( 1025 ); /* +1 for \0 */
1055 while ( !p_object->b_die )
1058 if ( !ReadFile( hChildStdoutRd, &(*pp_data)[*pi_data], 1024, &i_read,
1063 *pp_data = realloc( *pp_data, *pi_data + 1025 );
1066 while ( !p_object->b_die
1067 && !GetExitCodeProcess( piProcInfo.hProcess, &i_status )
1068 && i_status != STILL_ACTIVE )
1071 CloseHandle(piProcInfo.hProcess);
1072 CloseHandle(piProcInfo.hThread);
1076 "child %s returned with error code %ld",
1077 ppsz_argv[0], i_status );
1080 msg_Err( p_object, "vlc_execve called but no implementation is available" );
1085 if (*pp_data == NULL)
1088 (*pp_data)[*pi_data] = '\0';