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src/print_ifindex.c
64 строки
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Eugene Syromyatnikov
print_ifindex: fix IFNAME_QUOTED_SZ definition
01 дек 2021, 19:38
01 дек 2021, 19:38
e27b067
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/* * Copyright (c) 2001-2021 The strace developers. * All rights reserved. * * SPDX-License-Identifier: LGPL-2.1-or-later */ #include "defs.h" #include <net/if.h> #ifdef HAVE_IF_INDEXTONAME # include "xstring.h" # define INI_PFX "if_nametoindex(\"" # define INI_SFX "\")" # define IFNAME_QUOTED_SZ (IFNAMSIZ * 4 + 3) const char * get_ifname(const unsigned int ifindex) { static char name_quoted_buf[IFNAME_QUOTED_SZ]; char name_buf[IFNAMSIZ]; if (!if_indextoname(ifindex, name_buf)) return NULL; if (string_quote(name_buf, name_quoted_buf, sizeof(name_buf), QUOTE_0_TERMINATED | QUOTE_OMIT_LEADING_TRAILING_QUOTES, NULL)) return NULL; return name_quoted_buf; } static const char * sprint_ifname(const unsigned int ifindex) { static char res[IFNAME_QUOTED_SZ + sizeof(INI_PFX INI_SFX)]; const char *name_quoted = get_ifname(ifindex); if (!name_quoted) return NULL; xsprintf(res, INI_PFX "%s" INI_SFX, name_quoted); return res; } #else /* !HAVE_IF_INDEXTONAME */ const char *get_ifname(const unsigned int ifindex) { return NULL; } #endif /* HAVE_IF_INDEXTONAME */ void print_ifindex(const unsigned int ifindex) { #ifdef HAVE_IF_INDEXTONAME print_xlat_ex(ifindex, sprint_ifname(ifindex), XLAT_STYLE_FMT_U); #else PRINT_VAL_U(ifindex); #endif }