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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:37:38 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:37:38 +0000 |
commit | ae581a19fbe896a797450b9d9573fb66f2735227 (patch) | |
tree | 56c40be8518a29c9351364d13a9676aa83932dc0 /lib/iolog/iolog_path.c | |
parent | Initial commit. (diff) | |
download | sudo-ae581a19fbe896a797450b9d9573fb66f2735227.tar.xz sudo-ae581a19fbe896a797450b9d9573fb66f2735227.zip |
Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/iolog/iolog_path.c')
-rw-r--r-- | lib/iolog/iolog_path.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/lib/iolog/iolog_path.c b/lib/iolog/iolog_path.c new file mode 100644 index 0000000..16f228c --- /dev/null +++ b/lib/iolog/iolog_path.c @@ -0,0 +1,130 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2011-2015 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#ifdef HAVE_STDBOOL_H +# include <stdbool.h> +#else +# include "compat/stdbool.h" +#endif /* HAVE_STDBOOL_H */ +#include <string.h> +#include <limits.h> +#include <time.h> +#include <unistd.h> + +#include "sudo_compat.h" +#include "sudo_debug.h" +#include "sudo_fatal.h" +#include "sudo_gettext.h" +#include "sudo_iolog.h" +#include "sudo_util.h" + +/* + * Expand any escape sequences in inpath, returning the expanded path. + */ +bool +expand_iolog_path(const char *inpath, char *path, size_t pathlen, + const struct iolog_path_escape *escapes, void *closure) +{ + char *dst, *pathend, tmpbuf[PATH_MAX]; + const char *endbrace, *src; + bool strfit = false; + size_t len; + debug_decl(expand_iolog_path, SUDO_DEBUG_UTIL); + + /* Collapse multiple leading slashes. */ + while (inpath[0] == '/' && inpath[1] == '/') + inpath++; + + pathend = path + pathlen; + for (src = inpath, dst = path; *src != '\0'; src++) { + if (src[0] == '%') { + if (src[1] == '{') { + endbrace = strchr(src + 2, '}'); + if (endbrace != NULL) { + const struct iolog_path_escape *esc; + len = (size_t)(endbrace - src - 2); + for (esc = escapes; esc->name != NULL; esc++) { + if (strncmp(src + 2, esc->name, len) == 0 && + esc->name[len] == '\0') + break; + } + if (esc->name != NULL) { + len = esc->copy_fn(dst, (size_t)(pathend - dst), + closure); + if (len >= (size_t)(pathend - dst)) + goto bad; + dst += len; + src = endbrace; + continue; + } + } + } else if (src[1] == '%') { + /* Collapse %% -> % */ + src++; + } else { + /* May need strftime() */ + strfit = true; + } + } + /* Need at least 2 chars, including the NUL terminator. */ + if (dst + 1 >= pathend) + goto bad; + *dst++ = *src; + } + + /* Trim trailing slashes and NUL terminate. */ + while (dst > path && dst[-1] == '/') + dst--; + *dst = '\0'; + + /* Expand strftime escapes as needed. */ + if (strfit) { + struct tm tm; + time_t now; + + time(&now); + if (localtime_r(&now, &tm) == NULL) + goto bad; + + /* We only call strftime() on the current part of the buffer. */ + tmpbuf[sizeof(tmpbuf) - 1] = '\0'; + len = strftime(tmpbuf, sizeof(tmpbuf), path, &tm); + + if (len == 0 || tmpbuf[sizeof(tmpbuf) - 1] != '\0') + goto bad; /* strftime() failed, buf too small? */ + + if (len >= (size_t)(pathend - path)) + goto bad; /* expanded buffer too big to fit. */ + memcpy(path, tmpbuf, len); + dst = path + len; + *dst = '\0'; + } + + debug_return_bool(true); +bad: + debug_return_bool(false); +} |