June 2016 - Pacman-dev - lists.archlinux.org

[pacman-dev] [PATCH] libmakepkg: look for architecture-specific hashes in get_integlist
by Jack O'Connor 31 Jul '16

31 Jul '16

`makepkg -g` looks for existing checksums in the PKGBUILD file, so that it can generate new sums of the same type. Previously it only checked variables of the form "sha256sums", and not "sha256sums_x86_64". That meant it would always fall back to MD5 for packages with only architecture-specific sources. This change makes it look at architecture-specific checksums too to determine the type. Signed-off-by: Jack O'Connor <oconnor663(a)gmail.com> --- scripts/libmakepkg/util/pkgbuild.sh.in | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/scripts/libmakepkg/util/pkgbuild.sh.in b/scripts/libmakepkg/util/pkgbuild.sh.in index 1a4567d..2157b56 100644 --- a/scripts/libmakepkg/util/pkgbuild.sh.in +++ b/scripts/libmakepkg/util/pkgbuild.sh.in @@ -195,10 +195,21 @@ get_integlist() { local integlist=() for integ in "${known_hash_algos[@]}"; do + # check for e.g. "sha256sums" local sumname="${integ}sums[@]" if [[ -n ${!sumname} ]]; then integlist+=("$integ") + continue fi + + # check for e.g. "sha256sums_x86_64" + for a in "${arch[@]}"; do + local sumname="${integ}sums_${a}[@]" + if [[ -n ${!sumname} ]]; then + integlist+=("$integ") + break + fi + done done if (( ${#integlist[@]} > 0 )); then -- 2.9.0

2 1

[pacman-dev] [PATCH] configure.ac: Fix handling --with-libcurl
by Olivier Brunel 30 Jun '16

30 Jun '16

It was reported being --with-libcurl in the help (and the check for libcurl being installed used $with_libcurl accordingly), but the option handling was set using $with_curl and, therefore, expected option --with-curl. In the end, --with-libcurl wasn't recognized, and --with-curl had no effect. Signed-off-by: Olivier Brunel <jjk(a)jjacky.com> --- configure.ac | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/configure.ac b/configure.ac index dd4ac04..03e9670 100644 --- a/configure.ac +++ b/configure.ac @@ -131,9 +131,9 @@ AC_ARG_WITH(gpgme, [], [with_gpgme=check]) # Help line for using libcurl -AC_ARG_WITH(curl, +AC_ARG_WITH(libcurl, AS_HELP_STRING([--with-libcurl], [use libcurl for the internal downloader]), - [], [with_curl=check]) + [], [with_libcurl=check]) # Help line for documentation AC_ARG_ENABLE(doc, -- 2.9.0

2 1

[pacman-dev] [PATCH] hook.c: replace fstatat with stat
by Andrew Gregory 30 Jun '16

30 Jun '16

macOS < 10.10 do not provide fstatat. We were constructing the full path to the hook file for all other operations anyway, so there was no real benefit to using fstatat. Fixes FS#49771 Signed-off-by: Andrew Gregory <andrew.gregory.8(a)gmail.com> --- lib/libalpm/hook.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/libalpm/hook.c b/lib/libalpm/hook.c index 9b4f215..ccde225 100644 --- a/lib/libalpm/hook.c +++ b/lib/libalpm/hook.c @@ -675,7 +675,7 @@ int _alpm_hook_run(alpm_handle_t *handle, alpm_hook_when_t when) continue; } - if(fstatat(dirfd(d), entry->d_name, &buf, 0) != 0) { + if(stat(path, &buf) != 0) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not stat file %s: %s\n"), path, strerror(errno)); ret = -1; -- 2.9.0

2 1

[pacman-dev] [PATCH] hook.c: replace readdir_r with readdir
by Andrew Gregory 30 Jun '16

30 Jun '16

glibc 2.24 deprecates readdir_r. Signed-off-by: Andrew Gregory <andrew.gregory.8(a)gmail.com> --- lib/libalpm/hook.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/lib/libalpm/hook.c b/lib/libalpm/hook.c index 6890a6e..9b4f215 100644 --- a/lib/libalpm/hook.c +++ b/lib/libalpm/hook.c @@ -623,10 +623,9 @@ int _alpm_hook_run(alpm_handle_t *handle, alpm_hook_when_t when) int ret = 0; for(i = alpm_list_last(handle->hookdirs); i; i = alpm_list_previous(i)) { - int err; char path[PATH_MAX]; size_t dirlen; - struct dirent entry, *result; + struct dirent *entry; DIR *d; if((dirlen = strlen(i->data)) >= PATH_MAX) { @@ -648,35 +647,35 @@ int _alpm_hook_run(alpm_handle_t *handle, alpm_hook_when_t when) } } - while((err = readdir_r(d, &entry, &result)) == 0 && result) { + while((errno = 0, entry = readdir(d))) { struct _alpm_hook_cb_ctx ctx = { handle, NULL }; struct stat buf; size_t name_len; - if(strcmp(entry.d_name, ".") == 0 || strcmp(entry.d_name, "..") == 0) { - continue; + if(strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) { + continue; } - if((name_len = strlen(entry.d_name)) >= PATH_MAX - dirlen) { + if((name_len = strlen(entry->d_name)) >= PATH_MAX - dirlen) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not open file: %s%s: %s\n"), - path, entry.d_name, strerror(ENAMETOOLONG)); + path, entry->d_name, strerror(ENAMETOOLONG)); ret = -1; continue; } - memcpy(path + dirlen, entry.d_name, name_len + 1); + memcpy(path + dirlen, entry->d_name, name_len + 1); if(name_len < suflen - || strcmp(entry.d_name + name_len - suflen, suffix) != 0) { + || strcmp(entry->d_name + name_len - suflen, suffix) != 0) { _alpm_log(handle, ALPM_LOG_DEBUG, "skipping non-hook file %s\n", path); continue; } - if(find_hook(hooks, entry.d_name)) { + if(find_hook(hooks, entry->d_name)) { _alpm_log(handle, ALPM_LOG_DEBUG, "skipping overridden hook %s\n", path); continue; } - if(fstatat(dirfd(d), entry.d_name, &buf, 0) != 0) { + if(fstatat(dirfd(d), entry->d_name, &buf, 0) != 0) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not stat file %s: %s\n"), path, strerror(errno)); ret = -1; @@ -700,11 +699,10 @@ int _alpm_hook_run(alpm_handle_t *handle, alpm_hook_when_t when) continue; } - STRDUP(ctx.hook->name, entry.d_name, ret = -1; closedir(d); goto cleanup); + STRDUP(ctx.hook->name, entry->d_name, ret = -1; closedir(d); goto cleanup); hooks = alpm_list_add(hooks, ctx.hook); } - - if(err != 0) { + if(errno != 0) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not read directory: %s: %s\n"), (char *) i->data, strerror(errno)); ret = -1; -- 2.9.0

2 1

[pacman-dev] [PATCH] Fix typo in german translation
by Jan-Marten Brüggemann 27 Jun '16

27 Jun '16

This patch fixes a typo in the german translation of pacman. Because the german word for package is "Paket" not "Packet". Signed-off-by: Jan-Marten Brüggemann <brueggemann(a)b1-systems.de> --- src/pacman/po/de.po | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/pacman/po/de.po b/src/pacman/po/de.po index e9c9460..45f594e 100644 --- a/src/pacman/po/de.po +++ b/src/pacman/po/de.po @@ -1354,7 +1354,7 @@ msgstr "Konnte den Vorgang nicht vorbereiten (%s)\n" #: src/pacman/remove.c:125 src/pacman/sync.c:724 #, c-format msgid "%s: removing %s breaks dependency '%s'\n" -msgstr "%s: das Entfernen von %s löscht ein benötigtes Packet von '%s'\n" +msgstr "%s: das Entfernen von %s löscht ein benötigtes Paket von '%s'\n" #: src/pacman/remove.c:144 #, c-format @@ -1494,7 +1494,7 @@ msgstr "%s: benötigt %s\n" #, c-format msgid "%s: installing %s (%s) breaks dependency '%s'\n" msgstr "" -"%s: das Installieren von %s (%s) löscht ein benötigtes Packet von '%s'\n" +"%s: das Installieren von %s (%s) löscht ein benötigtes Paket von '%s'\n" #: src/pacman/sync.c:744 #, c-format -- 2.9.0

4 4

[pacman-dev] [PATCH] Added the --bell switch.
by Eric Toombs 26 Jun '16

26 Jun '16

This switch rings the terminal bell when user input is required. Obviously, it has no effect if --noconfirm is also passed. --- doc/pacman.8.txt | 3 +++ src/pacman/conf.h | 4 +++- src/pacman/pacman.c | 3 +++ src/pacman/util.c | 15 +++++++++------ 4 files changed, 18 insertions(+), 7 deletions(-) diff --git a/doc/pacman.8.txt b/doc/pacman.8.txt index 514f559..6e0617a 100644 --- a/doc/pacman.8.txt +++ b/doc/pacman.8.txt @@ -148,6 +148,9 @@ Options *\--arch* <arch>:: Specify an alternate architecture. +*\--bell*:: + Sound the terminal bell when input is required. + *\--cachedir* <dir>:: Specify an alternative package cache location (a typical default is +{localstatedir}/cache/pacman/pkg+). Multiple cache directories can be diff --git a/src/pacman/conf.h b/src/pacman/conf.h index 7a7e9cf..463ae48 100644 --- a/src/pacman/conf.h +++ b/src/pacman/conf.h @@ -55,6 +55,7 @@ typedef struct __config_t { unsigned short checkspace; unsigned short usesyslog; unsigned short color; + unsigned short bell; double deltaratio; char *arch; char *print_format; @@ -201,7 +202,8 @@ enum { OP_VERBOSE, OP_DOWNLOADONLY, OP_REFRESH, - OP_ASSUMEINSTALLED + OP_ASSUMEINSTALLED, + OP_BELL }; /* clean method */ diff --git a/src/pacman/pacman.c b/src/pacman/pacman.c index 94685a7..07282e7 100644 --- a/src/pacman/pacman.c +++ b/src/pacman/pacman.c @@ -221,6 +221,7 @@ static void usage(int op, const char * const myname) addlist(_(" --logfile <path> set an alternate log file\n")); addlist(_(" --noconfirm do not ask for any confirmation\n")); addlist(_(" --confirm always ask for confirmation\n")); + addlist(_(" --bell sound the terminal bell when input is required\n")); } list = alpm_list_msort(list, alpm_list_count(list), options_cmp); for(i = list; i; i = alpm_list_next(i)) { @@ -480,6 +481,7 @@ static int parsearg_global(int opt) case OP_CONFIRM: config->noconfirm = 0; break; + case OP_BELL: config->bell = 1; break; case OP_DBPATH: case 'b': free(config->dbpath); @@ -981,6 +983,7 @@ static int parseargs(int argc, char *argv[]) {"gpgdir", required_argument, 0, OP_GPGDIR}, {"dbonly", no_argument, 0, OP_DBONLY}, {"color", required_argument, 0, OP_COLOR}, + {"bell", no_argument, 0, OP_BELL}, {0, 0, 0, 0} }; diff --git a/src/pacman/util.c b/src/pacman/util.c index 5f331e8..9183047 100644 --- a/src/pacman/util.c +++ b/src/pacman/util.c @@ -1396,13 +1396,14 @@ int multiselect_question(char *array, int count) fprintf(stream, "\n"); fprintf(stream, _("Enter a selection (default=all)")); fprintf(stream, ": "); - fflush(stream); if(config->noconfirm) { fprintf(stream, "\n"); break; + } else if(config->bell) { + fprintf(stream, "\a"); } - + fflush(stream); flush_term_input(fileno(stdin)); if(safe_fgets(response, response_len, stdin)) { @@ -1463,13 +1464,14 @@ int select_question(int count) fprintf(stream, "\n"); fprintf(stream, _("Enter a number (default=%d)"), preset); fprintf(stream, ": "); - fflush(stream); if(config->noconfirm) { fprintf(stream, "\n"); break; + } else if(config->bell) { + fprintf(stream, "\a"); } - + fflush(stream); flush_term_input(fileno(stdin)); if(safe_fgets(response, sizeof(response), stdin)) { @@ -1517,13 +1519,14 @@ static int question(short preset, const char *format, va_list args) } fputs(config->colstr.nocolor, stream); - fflush(stream); if(config->noconfirm) { fprintf(stream, "\n"); return preset; + } else if(config->bell) { + fprintf(stream, "\a"); } - + fflush(stream); flush_term_input(fd_in); if(safe_fgets(response, sizeof(response), stdin)) { -- 2.6.2

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[pacman-dev] [PATCH RFC] DWIM if user attempts to sync on a file
by Andrew Eikum 23 Jun '16

23 Jun '16

I get bit by this fairly often when I build AUR packages. From my perspective as a user, the distinction between -U and -S seems irrelevant: I just want to install this package. So let's just have pacman offer to Do What I Mean and install the files if I use -S when I should have used -U. Signed-off-by: Andrew Eikum <coldpie(a)fastmail.com> --- RFC because this lacks tests and maybe UI polish, but I thought I'd see if there's interest in this change before I put more effort into it. --- src/pacman/sync.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) diff --git a/src/pacman/sync.c b/src/pacman/sync.c index 8b30603..faad728 100644 --- a/src/pacman/sync.c +++ b/src/pacman/sync.c @@ -619,6 +619,9 @@ static int process_targname(alpm_list_t *dblist, const char *targname, return process_group(dblist, targname, error); } +#define TGT_FAIL 1 +#define TGT_FAIL_IS_FILE 2 + static int process_target(const char *target, int error) { /* process targets */ @@ -639,7 +642,7 @@ static int process_target(const char *target, int error) if(!db) { pm_printf(ALPM_LOG_ERROR, _("database not found: %s\n"), dbname); - ret = 1; + ret = TGT_FAIL; goto cleanup; } @@ -667,6 +670,7 @@ cleanup: pm_printf(ALPM_LOG_WARNING, _("'%s' is a file, did you mean %s instead of %s?\n"), target, "-U/--upgrade", "-S/--sync"); + ret = TGT_FAIL_IS_FILE; } return ret; } @@ -682,14 +686,29 @@ static int sync_trans(alpm_list_t *targets) } /* process targets */ + if(targets) { + retval = -1; + } for(i = targets; i; i = alpm_list_next(i)) { const char *targ = i->data; - if(process_target(targ, retval) == 1) { - retval = 1; + int ret = process_target(targ, retval); + if(retval < 0) { + retval = ret; + }else if(retval != ret) { + retval = TGT_FAIL; + } + } + + if(retval == TGT_FAIL_IS_FILE) { + int confirm = noyes(_("Proceed with install from file(s)?")); + if(confirm) { + trans_release(); + return pacman_upgrade(targets); } + retval = TGT_FAIL; } - if(retval) { + if(retval == TGT_FAIL) { trans_release(); return retval; } -- 2.8.3

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[pacman-dev] [RFC] [PATCH] Implement a du --apparent-size equivalent
by Alastair Hughes 22 Jun '16

22 Jun '16

From: Alastair Hughes <hobbitalastair(a)yandex.com> Add a pkgsize binary which mimics the behaviour of GNU du --apparent-size -skl. Fixes FS#47943. Signed-off-by: Alastair Hughes <hobbitalastair(a)gmail.com> --- I haven't done much C programming before - I'd appreciate any feedback you have. At the moment, this patch creates a new pkgsize binary as an extra utility, and installs with the other utilities. I think that it would be better if it installed it to a libexec dir, but I'm not entirely sure how to do that without making a mess. --- configure.ac | 5 --- scripts/Makefile.am | 2 -- scripts/makepkg.sh.in | 2 +- src/util/.gitignore | 2 ++ src/util/Makefile.am | 4 ++- src/util/pkgsize.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 94 insertions(+), 9 deletions(-) create mode 100644 src/util/pkgsize.c diff --git a/configure.ac b/configure.ac index dd4ac04..ee5f7ea 100644 --- a/configure.ac +++ b/configure.ac @@ -332,7 +332,6 @@ OWNERCMD="stat -c '%u:%g'" MODECMD="stat -c '%a'" SIZECMD="stat -c %s" SEDINPLACE="sed --follow-symlinks -i" -DUFLAGS="-sk --apparent-size" STRIP_BINARIES="--strip-all" STRIP_SHARED="--strip-unneeded" STRIP_STATIC="--strip-debug" @@ -343,7 +342,6 @@ case "${host_os}" in MODECMD="stat -f '%Lp'" SIZECMD="stat -f %z" SEDINPLACE="sed -i \"\"" - DUFLAGS="-sk" ;; darwin*) host_os_darwin=yes @@ -352,7 +350,6 @@ case "${host_os}" in MODECMD="/usr/bin/stat -f '%Lp'" SIZECMD="/usr/bin/stat -f %z" SEDINPLACE="/usr/bin/sed -i ''" - DUFLAGS="-sk" STRIP_BINARIES="" STRIP_SHARED="-S" STRIP_STATIC="-S" @@ -360,13 +357,11 @@ case "${host_os}" in esac AM_CONDITIONAL([DARWIN], test "x$host_os_darwin" = "xyes") -AC_PATH_PROGS([DUPATH], [du], [du], [/usr/bin$PATH_SEPARATOR/bin] ) AC_SUBST(INODECMD) AC_SUBST(OWNERCMD) AC_SUBST(MODECMD) AC_SUBST(SIZECMD) AC_SUBST(SEDINPLACE) -AC_SUBST(DUFLAGS) AC_SUBST(STRIP_BINARIES) AC_SUBST(STRIP_SHARED) AC_SUBST(STRIP_STATIC) diff --git a/scripts/Makefile.am b/scripts/Makefile.am index e4f9fb1..ea14e73 100644 --- a/scripts/Makefile.am +++ b/scripts/Makefile.am @@ -138,8 +138,6 @@ edit = sed \ -e "s|@MODECMD[@]|$(MODECMD)|g" \ -e 's|@SIZECMD[@]|$(SIZECMD)|g' \ -e 's|@SEDINPLACE[@]|$(SEDINPLACE)|g' \ - -e 's|@DUFLAGS[@]|$(DUFLAGS)|g' \ - -e 's|@DUPATH[@]|$(DUPATH)|g' \ -e 's|@SCRIPTNAME[@]|$@|g' \ -e 's|@configure_input[@]|Generated from $@.sh.in; do not edit by hand.|g' diff --git a/scripts/makepkg.sh.in b/scripts/makepkg.sh.in index 7b2ce51..249c878 100644 --- a/scripts/makepkg.sh.in +++ b/scripts/makepkg.sh.in @@ -605,7 +605,7 @@ write_pkginfo() { local packager="Unknown Packager" fi - local size="$(@DUPATH@ @DUFLAGS@)" + local size="$(pkgsize .)" size="$(( ${size%%[^0-9]*} * 1024 ))" merge_arch_attrs diff --git a/src/util/.gitignore b/src/util/.gitignore index 202fb75..7dbefe8 100644 --- a/src/util/.gitignore +++ b/src/util/.gitignore @@ -6,6 +6,8 @@ pacsort pacsort.exe pactree pactree.exe +pkgsize +pkgsize.exe testpkg testpkg.exe vercmp diff --git a/src/util/Makefile.am b/src/util/Makefile.am index 6a89ea6..84dfce9 100644 --- a/src/util/Makefile.am +++ b/src/util/Makefile.am @@ -4,7 +4,7 @@ dbpath = ${localstatedir}/lib/pacman/ gpgdir = ${sysconfdir}/pacman.d/gnupg/ cachedir = ${localstatedir}/cache/pacman/pkg/ -bin_PROGRAMS = vercmp testpkg cleanupdelta pacsort pactree +bin_PROGRAMS = vercmp testpkg cleanupdelta pacsort pactree pkgsize AM_CPPFLAGS = \ -imacros $(top_builddir)/config.h \ @@ -27,6 +27,8 @@ pacsort_LDADD = $(top_builddir)/lib/libalpm/.libs/libalpm.la pactree_SOURCES = pactree.c util-common.c pactree_LDADD = $(top_builddir)/lib/libalpm/.libs/libalpm.la +pkgsize_SOURCES = pkgsize.c + testpkg_SOURCES = testpkg.c testpkg_LDADD = $(top_builddir)/lib/libalpm/.libs/libalpm.la diff --git a/src/util/pkgsize.c b/src/util/pkgsize.c new file mode 100644 index 0000000..5e1b3fc --- /dev/null +++ b/src/util/pkgsize.c @@ -0,0 +1,88 @@ +/* + * pkgsize.c - a du --apparent-size equivalent for systems without GNU du + * + * Copyright (c) 2016 Pacman Development Team <pacman-dev(a)archlinux.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/* This is equivalent to "du -skl --apparent-size". + * Unforunately, there appears to be no easy way of ignoring hard links, hence + * the additional '-l' argument. + */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <string.h> +#include <stdlib.h> +#include <stdio.h> +#include <dirent.h> +#include <unistd.h> + +static long size(char *path) +{ + long total_size, subsize; + DIR *dir; + struct dirent *entry; + struct stat buf; + + if(lstat(path, &buf) != 0) { return -1; } + + if(S_ISLNK(buf.st_mode) || S_ISREG(buf.st_mode)) { + return buf.st_size; + } else if(S_ISDIR(buf.st_mode)) { + total_size = buf.st_size; + dir = opendir(path); + if(dir == NULL || chdir(path) != 0) { return -1; } + while(entry = readdir(dir)) { + if(strcmp(entry->d_name, "..") == 0 || strcmp(entry->d_name, ".") == 0) { + continue; + } + subsize = size(entry->d_name); + if(subsize == -1) { + closedir(dir); + return -1; + } + total_size += subsize; + } + + closedir(dir); + if(chdir("../") != 0) { return -1; } + return total_size; + } + return 0; +} + +int main(int argc, char *argv[]) +{ + long total_size; + + if(argc != 2) { + printf("Invalid argument count %d!\n", argc - 1); + exit(EXIT_FAILURE); + } + + total_size = size(argv[1]); + if(total_size == -1) { + perror(""); + exit(EXIT_FAILURE); + } + + /* Use KB, rounded up - should be equivalent to the du -k flag */ + printf("%ld %s\n", (total_size / 1024) + (total_size % 1024 != 0), argv[1]); + + exit(EXIT_SUCCESS); +} + +/* vim: set noet: */ -- 2.8.3

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[pacman-dev] [PATCH] Make DUFLAGS be overrideable during configure
by Alastair Hughes 22 Jun '16

22 Jun '16

Signed-off-by: Alastair Hughes <hobbitalastair(a)gmail.com> --- configure.ac | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)

1 0

[pacman-dev] [PATCH] Prevent stack overflow on symbolic link access.
by Tobias Stoeckmann 22 Jun '16

22 Jun '16

It is possible (but unlikely) to encounter very long symbolic links, which would take a few mega bytes in size. In general, such long symbolic links are impossible to create because the kernel will only accept up to PATH_MAX in length. BUT lstat() on a maliciously modified symbolic link can return a much larger size than that. In function check_file_link (src/pacman/check.c), the length of a symbolic link is used in a variable length array: char link[length]; // length being st->st_size + 1 This doesn't just allow a very theoretical overflow on 32 bit systems with 64 bit off_t (which is st_size's type), it can also overflow available stack space, leading to a segmentation fault. Symbolic links pointing to something that is longer than PATH_MAX can be considered illegal, so just get a fixed size array and reject symbolic links which are longer than that. --- src/pacman/check.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/src/pacman/check.c b/src/pacman/check.c index d282cc2..6e8cda7 100644 --- a/src/pacman/check.c +++ b/src/pacman/check.c @@ -132,15 +132,16 @@ static int check_file_time(const char *pkgname, const char *filepath, static int check_file_link(const char *pkgname, const char *filepath, struct stat *st, struct archive_entry *entry) { - size_t length = st->st_size + 1; - char link[length]; + ssize_t len; + char link[PATH_MAX]; - if(readlink(filepath, link, length) != st->st_size) { + len = readlink(filepath, link, sizeof(link)); + if (len == -1 || len >= PATH_MAX) { /* this should not happen */ pm_printf(ALPM_LOG_ERROR, _("unable to read symlink contents: %s\n"), filepath); return 1; } - link[length - 1] = '\0'; + link[len] = '\0'; if(strcmp(link, archive_entry_symlink(entry)) != 0) { if(!config->quiet) { -- 2.8.3

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