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Add an OFF_T_MAX define

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This will be used for integer overflow checks when copying files.
This commit is contained in:
Todd C. Miller 2025-01-14 11:38:07 -07:00
parent 30729312c2
commit 7c075c100d
4 changed files with 48 additions and 1 deletions
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3
config.h.in
View File

@ -1302,6 +1302,9 @@
/* The size of 'long long', as computed by sizeof. */
#undef SIZEOF_LONG_LONG
/* The size of 'off_t', as computed by sizeof. */
#undef SIZEOF_OFF_T
/* The size of 'time_t', as computed by sizeof. */
#undef SIZEOF_TIME_T

35
configure vendored
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@ -21185,6 +21185,41 @@ printf "%s\n" "$ac_cv_sizeof_id_t" >&6; }
printf "%s\n" "#define SIZEOF_ID_T $ac_cv_sizeof_id_t" >>confdefs.h
# The cast to long int works around a bug in the HP C Compiler
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
# declarations like 'int a3[[(sizeof (unsigned char)) >= 0]];'.
# This bug is HP SR number 8606223364.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of off_t" >&5
printf %s "checking size of off_t... " >&6; }
if test ${ac_cv_sizeof_off_t+y}
then :
printf %s "(cached) " >&6
else case e in #(
e) if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (off_t))" "ac_cv_sizeof_off_t" "$ac_includes_default"
then :
else case e in #(
e) if test "$ac_cv_type_off_t" = yes; then
{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
as_fn_error 77 "cannot compute sizeof (off_t)
See 'config.log' for more details" "$LINENO" 5; }
else
ac_cv_sizeof_off_t=0
fi ;;
esac
fi
;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_off_t" >&5
printf "%s\n" "$ac_cv_sizeof_off_t" >&6; }
printf "%s\n" "#define SIZEOF_OFF_T $ac_cv_sizeof_off_t" >>confdefs.h
# The cast to long int works around a bug in the HP C Compiler
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
# declarations like 'int a3[[(sizeof (unsigned char)) >= 0]];'.

3
configure.ac
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@ -3,7 +3,7 @@ dnl Use the top-level autogen.sh script to generate configure and config.h.in
dnl
dnl SPDX-License-Identifier: ISC
dnl
dnl Copyright (c) 1994-1996, 1998-2024 Todd C. Miller <Todd.Miller@sudo.ws>
dnl Copyright (c) 1994-1996, 1998-2025 Todd C. Miller <Todd.Miller@sudo.ws>
dnl
dnl Permission to use, copy, modify, and distribute this software for any
dnl purpose with or without fee is hereby granted, provided that the above
@ -2519,6 +2519,7 @@ SUDO_SOCK_SIN_LEN
AC_CHECK_SIZEOF([long])
AC_CHECK_SIZEOF([long long])
AC_CHECK_SIZEOF([id_t])
AC_CHECK_SIZEOF([off_t])
AC_CHECK_SIZEOF([time_t])
AC_CHECK_SIZEOF([uid_t])
# sudo current assumes uid_t can be cast to unsigned int without problems

8
include/sudo_util.h
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@ -33,6 +33,14 @@
#endif
#define ROOT_GID 0
#ifndef OFF_T_MAX
# if SIZEOF_OFF_T == 8
# define OFF_T_MAX LLONG_MAX
# else
# define OFF_T_MAX INT_MAX
# endif
#endif
#ifndef TIME_T_MIN
# if SIZEOF_TIME_T == 8
# define TIME_T_MIN LLONG_MIN