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path: root/lib/libalpm/util.c
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2020-07-07Add a utility function to check whether a file exists in the cacheAnatol Pomozov
It is similar to _alpm_filecache_find() but does not return a dynamically allocated memory to user. Thus the user does not need to free this resource. Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2020-04-29Constify some input pointersRikard Falkeborn
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2020-04-13Use STRDUP for error checking in more placesAllan McRae
Use STRDUP() over strdup() to catch memory allocation errors. There are still some instances of strdup left, but these are in functions that currently have no error path and would require a larger rework. Signed-off-by: Allan McRae <allan@archlinux.org>
2020-04-13Add REALLOC macro to simplify realloc error handlingRikard Falkeborn
realloc can fail just like the other memory allocation functions. Add a macro to simplify handling of realloc failures, similar to the already existing MALLOC, CALLOC, etc. Replace the existing realloc uses with the new macro, allowing us to move tedious error handling to the macro. Also, in be_package and be_sync, this fixes hypothetical memory leaks (and thereafter null pointer dereferences) in case realloc fails to shrink the allocated memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2020-02-10build-aux/update-copyright 2019 2020Allan McRae
Signed-off-by: Allan McRae <allan@archlinux.org>
2020-01-28Docs docs docsmorganamilo
libalpm: move docs from .c files into alpm.h And fix/expand some along the way. Signed-off-by: Allan McRae <allan@archlinux.org>
2020-01-07Use c99 struct initialization to avoid memset callsDave Reisner
This is guaranteed less error prone than calling memset and hoping the human gets the argument order correct.
2019-10-23Update copyright yearsAllan McRae
make update-copyright OLD=2018 NEW=2019 Signed-off-by: Allan McRae <allan@archlinux.org>
2018-10-21handle EINTR while polling scripts/hooksAndrew Gregory
If poll() is interrupted by a signal, alpm was closing the socket it uses for listening to script/hook output. This would drop script output at the least and kill the script at the worst. Fixes FS#60396 Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2018-10-21reset signal handlers before running scripts/hooksAndrew Gregory
Front-ends or libraries may set signals to be ignored, which gets inherited across fork and exec. This can cause scripts to malfunction if they expect the signal. To make matters worse, scripts written in bash can't reset signals that were ignored when bash was started. Fixes FS#56756 Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2018-05-14Remove all modelines from the projectEli Schwartz
Many of these are pointless (e.g. there is no need to explicitly turn on spellchecking and language dictionaries for the manpages by default). The only useful modelines are the ones enforcing the project coding standards for indentation style (and "maybe" filetype/syntax, but everything except the asciidoc manpages and makepkg.conf is already autodetected), and indent style can be applied more easily with .editorconfig Signed-off-by: Eli Schwartz <eschwartz@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2018-03-14Update coyrights for 2018Allan McRae
make update-copyright OLD=2017 NEW=201 Signed-off-by: Allan McRae <allan@archlinux.org>
2017-04-16run_chroot: label pipe endpoints for readabilityAndrew Gregory
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
2017-04-16use sockets for scriptlet/hook communicationAndrew Gregory
If a scriptlet/hook dies at the wrong moment it can trigger SIGPIPE, terminating the process. For pipes, there is no way to prevent SIGPIPE other than ignoring it process-wide. This can have unintended consequences in a multi-threaded process. Using send(2) with sockets, however, allows ignoring SIGPIPE on a per-call basis, leaving other threads able to make use of SIGPIPE. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
2017-01-04Update copyright yearsAllan McRae
Signed-off-by: Allan McRae <allan@archlinux.org>
2016-10-22Allow replacing libcrypto with libnettle in pacmanFlorian Weigelt
Add a --with-nettle configure option that directs pacman to use the libnettle hashing functions. Only one of the --with-libssl and --with-nettle configure options can be specified. [Allan: rewrote configure check] Signed-off-by: Allan McRae <allan@archlinux.org>
2016-10-10Remove SHA224 supportAllan McRae
This was included due to use of PolarSSL's implementation for our internal SHA2 support. As our internal checksum calculations are now removed, we can also remove this unused code path. Signed-off-by: Allan McRae <allan@archlinux.org>
2016-10-10Remove internal md5 and sha2 implementationsAllan McRae
The internal implementations for md5 and sha256 checksums have not been merged from upstream sources for a long time. Instead of us carrying copies of code from other projects, we should just support building against multiple libraries that provide such functionality. This patch removes the md5 and sha2 code (originally obtained from PolarSSL) from our repository. The configure script will now error unless at least one library supporting checksum generation is present, with the only library currently supported being openssl. It will be relatively simple for other such libraries (e.g. nettle) to be supported if anyone wishes to add them. Signed-off-by: Allan McRae <allan@archlinux.org>
2016-05-05Avoid logical OR duplication warning from gcc-6Allan McRae
The value EAGAIN is allowed by POSIX to be the same as EWOULDBLOCK, but this is not guaranteed. Thus on some systems (e.g. glibc Linux), we get a warning that the logical OR is being performed on two expressions of the same type. We can not get rid of this test in case any system defines these as unique values. Suggested-by: Dave Reisner Signed-off-by: Allan McRae <allan@archlinux.org>
2016-02-23alpm_run_chroot: always connect parent2child pipeAndrew Gregory
Commit e374e6829cea3512f0b4a4069c5a6168f0f8d8a0 closed stdin before running scripts/hooks. This left the exec'd process with no file descriptor 0. If the process subsequently opened a file it would be assigned fd 0, and could potentially be confused for stdin. Connecting and immediately closing the parent2child pipe ensures that the child has an fd 0 and that it is empty. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2016-01-04Update copyright years for 2016Allan McRae
make update-copyright OLD=2015 NEW=2016 Signed-off-by: Allan McRae <allan@archlinux.org>
2015-12-06alpm_run_chroot: remove dead codeAndrew Gregory
Removes a leftover error message from when fdopen and fgets were used to read from the pipe. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2015-11-29run_chroot: always clear script output bufferAndrew Gregory
If the script output does not end in a newline there could still be data in the buffer after the poll loop. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2015-11-28allow specifying input to scriptletsAndrew Gregory
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2015-11-11Use correct format specifiersRikard Falkeborn
Signed-off-by: Allan McRae <allan@archlinux.org>
2015-05-12merge _alpm_logaction into alpm_logactionAndrew Gregory
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2015-03-26close stdin before running install scriptsAndrew Gregory
libalpm does not guarantee that script output will be presented to the user or that stdin will be connected to a terminal. Close stdin so that scripts do not attempt to use it for user interaction. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2015-02-01Update copyright notices for 2015Allan McRae
Signed-off-by: Allan McRae <allan@archlinux.org>
2015-01-21Merge branch 'maint'Allan McRae
2015-01-21fix geometric growth in _alpm_greedy_growDaniel Micay
It was allocating the required size rather than the calculated new size, resulting in pathological incremental reallocations. Signed-off-by: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2014-12-27_alpm_run_chroot: only close working directory if it was openedAllan McRae
Signed-off-by: Allan McRae <allan@archlinux.org>
2014-09-23wrap fgets to retry on EINTRAndrew Gregory
The read() underlying fgets() can be interrupted by a signal handler causing fgets() to return NULL. Before we started handling SIGWINCH, the odds of interrupting a read were low and typically resulted in termination anyway. Replace all fgets calls with a wrapper that retries in EINTR. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
2014-08-03move _alpm_lstat into util-commonAndrew Gregory
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
2014-03-03Update the event callbackOlivier Brunel
Instead of using two void* arguments for all events, we now send one pointer to an alpm_event_t struct. This contains the type of event that was triggered. With this information, the pointer can then be typecasted to the event-specific struct in order to get additional arguments. Signed-off-by: Olivier Brunel <jjk@jjacky.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2014-03-03util: Add _alpm_realloc() and _alpm_greedy_grow()Florian Pritz
These will be used in the following patches. Signed-off-by: Florian Pritz <bluewind@xinu.at>
2014-01-28Remove ts and sw from vim modeline when noet is setFlorian Pritz
Forcing vim users to view files with a tabstop of 2 seems really unnecessary when noet is set. I find it much easier to read code with ts=4 and I dislike having to override the modeline by hand. Command run: find . -type f -exec sed -i '/vim.* noet/s# ts=2 sw=2##' {} + Signed-off-by: Florian Pritz <bluewind@xinu.at> Signed-off-by: Allan McRae <allan@archlinux.org>
2014-01-06Use O_CLOEXEC as much as possible when opening filesDan McGee
When calling open(), use O_CLOEXEC as much as possible to ensure the file descriptor is closed when and if a process using libalpm forks. For most of these cases, and especially in utility functions, the file descriptor is opened and closed in the same function, so we don't have too much to worry about. However, for things like the log file and database lock file, we should ensure descriptors aren't left hanging around for children to touch. This patch is inspired by the problem in FS#36161, where an open file descriptor to the current working directory prevents chroot() from working on FreeBSD. We don't need this file descriptor in the child process, so open it (and now several others) with O_CLOEXEC. Signed-off-by: Dan McGee <dan@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2014-01-06Update copyright years for 2014Allan McRae
Signed-off-by: Allan McRae <allan@archlinux.org>
2013-12-15Close file descirptor before forkWolfgang Bumiller
FreeBSD chroot(2) fails with EPERM when a directory file descriptor is open with either `kern.chroot_allow_open_directories` being 0, or when the process already is inside a chroot. This is exposed in alpm_run_chroot that uses opendir() to open a file descriptor to the current directory before doing the forking and chrooting. Since the file descriptor is not used in the forked process, we close it. Fixes FS#36161. Signed-off-by: Allan McRae <allan@archlinux.org>
2013-11-15Fix whitespace and other formatting issuesJason St. John
This commit: -- replaces space-based indents with tabs per the coding standards -- removes extraneous whitespace (e.g. extra spaces between function args) -- adds missing braces for a one-line if statement Signed-off-by: Jason St. John <jstjohn@purdue.edu>
2013-09-04alpm: log errors for scriptlets terminated by a signalDave Reisner
Fixes FS#36618. Signed-off-by: Dave Reisner <dreisner@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2013-07-30Remove setlocale usage from the backendAllan McRae
Using setlocale in the backend is bound to lead to frontend issues and we have have been using epoch in our databases since April 2007 (commit 47622eef). Remove support for old style times. Signed-off-by: Allan McRae <allan@archlinux.org>
2013-07-05do not check error from close(2)Dave Reisner
On operating systems we support, the behavior is always such that the kernel will do the right thing as far as invalidating the file descriptor, regardless of the eventual return value. Therefore, potentially looping and calling close multiple times is wrong. At best, we call close again on an invalid FD and throw a spurious EBADF error. At worst, we might close an FD which doesn't belong to us when a multi-threaded application opens its own file descriptor between iterations of the loop. Signed-off-by: Dave Reisner <dreisner@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2013-06-26Enable inverted patterns in NoExtract and NoUpgrade.Patrick Steinhardt
It is now possible to invert patterns in NoExtract and NoUpgrade. This feature allows users to whitelist certain files that were previously blacklisted by another entry. Signed-off-by: Allan McRae <allan@archlinux.org>
2013-04-18Fix spelling errors using 'codespell' toolAnatol Pomozov
Signed-off-by: Allan McRae <allan@archlinux.org>
2013-03-14Save and restore old locale when manipulating via setlocaleDan McGee
We shouldn't assume a frontend program didn't explicitly set the LC_TIME setting to a value not in the environment, which is what we previously assumed. Save the old locale before forcing the 'C' locale and restore it when we are done. Signed-off-by: Dan McGee <dan@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2013-01-29Use libarchive compat header for relevant symbolsDave Reisner
Signed-off-by: Dave Reisner <dreisner@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
2013-01-28add caller prefix to alpm_logactionAndrew Gregory
prefix defaults to "UNKOWN" if null or an empty string is provided. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
2013-01-28Make path to ldconfig configurableAllan McRae
The FHS (2.3) says having ldconfig in /sbin is optional and it is usually located in /usr/sbin. So /sbin/ldconfig should not be hard coded in pacman. Instead, provide a configure option --with-ldconfig that defaults to the current path. Signed-off-by: Allan McRae <allan@archlinux.org>
2013-01-28Revert execvp and related commitsAllan McRae
This reverts commit 4a8c2852a887d2b1aaa43be3071ab586eb24b9e3. This reverts commit 993700bc6b12cd291544d2a22845f480e8a7925e. This reverts commit bb4d2b72c1d35ab9d65d632be0dcaf00cfa7d600. This reverts commit 60b192e3836a150eb6950ce52241efebbee00f11. Signed-off-by: Allan McRae <allan@archlinux.org>

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