/* Miscellaneous support functions for dynamic linker Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <assert.h> #include <fcntl.h> #include <unistd.h> #include <stdarg.h> #include <string.h> #include <unistd.h> #include <sys/mman.h> #include <sys/stat.h> #include <stdio-common/_itoa.h> #ifndef MAP_ANON /* This is the only dl-sysdep.c function that is actually needed at run-time by _dl_map_object. */ int _dl_sysdep_open_zero_fill (void) { return __open ("/dev/zero", O_RDONLY); } #endif /* Read the whole contents of FILE into new mmap'd space with given protections. *SIZEP gets the size of the file. */ void * _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot) { void *result; struct stat st; int fd = __open (file, O_RDONLY); if (fd < 0) return NULL; if (__fxstat (_STAT_VER, fd, &st) < 0 /* No need to map the file if it is empty. */ || st.st_size == 0) result = NULL; else { /* Map a copy of the file contents. */ result = __mmap (0, st.st_size, prot, #ifdef MAP_COPY MAP_COPY #else MAP_PRIVATE #endif #ifdef MAP_FILE | MAP_FILE #endif , fd, 0); if (result == MAP_FAILED) result = NULL; else *sizep = st.st_size; } __close (fd); return result; } /* Descriptor to write debug messages to. */ int _dl_debug_fd; void _dl_sysdep_output (int fd, const char *msg, ...) { va_list ap; va_start (ap, msg); do { size_t len = strlen (msg); __write (fd, msg, len); msg = va_arg (ap, const char *); } while (msg != NULL); va_end (ap); } void _dl_debug_message (int new_line, const char *msg, ...) { /* We print the strings we get passed one after the other but start all lines using the current PID. */ static int pid; va_list ap; if (pid == 0) pid = getpid (); va_start (ap, msg); do if (msg[0] == '\0') /* Get the next argument. */ msg = va_arg (ap, const char *); else { const char *endp; /* We actually will print something in this line. So print the PID now if needed. */ if (new_line) { char buf[7] = "00000:\t"; __write (_dl_debug_fd, _itoa_word (pid, &buf[5], 10, 0), 7); new_line = 0; } endp = strchr (msg, '\n'); if (endp == NULL) { __write (_dl_debug_fd, msg, strlen (msg)); msg = va_arg (ap, const char *); } else { __write (_dl_debug_fd, msg, endp - msg + 1); msg = endp + 1; new_line = 1; } } while (msg != NULL); va_end (ap); }