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| author | Dan McGee <dan@archlinux.org> | 2008-09-10 21:29:50 +0200 |
|---|---|---|
| committer | Dan McGee <dan@archlinux.org> | 2008-10-13 04:28:05 +0200 |
| commit | f9be2334f7b01ba30235500cb12d4ed61fff564b (patch) | |
| tree | 796b90d94985d8e0ad19f3c05d7f19dd275bc387 | |
| parent | 18452a6c51827e91f37978397552c30cb92c26cd (diff) | |
| download | pacman-f9be2334f7b01ba30235500cb12d4ed61fff564b.tar.gz pacman-f9be2334f7b01ba30235500cb12d4ed61fff564b.tar.xz | |
libalpm: handle syscall interruption correctly
It is possible to throw EINTR from a system call such as open(), close(), or
waitpid() if custom signal handlers are set up and they are not initialized
with the SA_RESTART flag. This was noticed by Andreas Radke when ^C (SIGINT)
was given during the call to waitpid(), causing it to throw the EINTR error
and we could not accommodate it.
Simply wrap these calls in a simple loop that allows us to retry the call if
interrupted.
Signed-off-by: Dan McGee <dan@archlinux.org>
| -rw-r--r-- | lib/libalpm/trans.c | 5 | ||||
| -rw-r--r-- | lib/libalpm/util.c | 3 |
2 files changed, 4 insertions, 4 deletions
diff --git a/lib/libalpm/trans.c b/lib/libalpm/trans.c index d6b165d3..f996c02c 100644 --- a/lib/libalpm/trans.c +++ b/lib/libalpm/trans.c @@ -30,7 +30,6 @@ #include <sys/types.h> #include <sys/stat.h> #include <sys/statvfs.h> -#include <unistd.h> #include <errno.h> /* libalpm */ @@ -205,7 +204,7 @@ int SYMEXPORT alpm_trans_release() /* unlock db */ if(handle->lckfd != -1) { - close(handle->lckfd); + while(close(handle->lckfd) == -1 && errno == EINTR); handle->lckfd = -1; } if(_alpm_lckrm()) { @@ -576,7 +575,7 @@ int _alpm_runscriptlet(const char *root, const char *installfn, /* this code runs for the parent only (wait on the child) */ pid_t retpid; int status; - retpid = waitpid(pid, &status, 0); + while((retpid = waitpid(pid, &status, 0)) == -1 && errno == EINTR); if(retpid == -1) { _alpm_log(PM_LOG_ERROR, _("call to waitpid failed (%s)\n"), strerror(errno)); diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c index b26c9702..da3463b0 100644 --- a/lib/libalpm/util.c +++ b/lib/libalpm/util.c @@ -254,7 +254,8 @@ int _alpm_lckmk() _alpm_makepath(dir); FREE(dir); - fd = open(file, O_WRONLY | O_CREAT | O_EXCL, 0000); + while((fd = open(file, O_WRONLY | O_CREAT | O_EXCL, 0000)) == -1 + && errno == EINTR); return(fd > 0 ? fd : -1); } |