rpmsq.c
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#include "system.h"
#if defined(__LCLINT__)
#define _BITS_SIGTHREAD_H /* XXX avoid __sigset_t heartburn. */
/*@-incondefs -protoparammatch@*/
/*@-exportheader@*/
/*@constant int SA_SIGINFO@*/
extern int sighold(int sig)
/*@globals errno, systemState @*/;
extern int sigignore(int sig)
/*@globals errno, systemState @*/;
extern int sigpause(int sig)
/*@globals errno, systemState @*/;
extern int sigrelse(int sig)
/*@globals errno, systemState @*/;
extern void (*sigset(int sig, void (*disp)(int)))(int)
/*@globals errno, systemState @*/;
struct qelem;
extern void __insque(struct qelem * __elem, struct qelem * __prev)
/*@modifies __elem, __prev @*/;
extern void __remque(struct qelem * __elem)
/*@modifies __elem @*/;
extern pthread_t pthread_self(void)
/*@*/;
extern int pthread_equal(pthread_t t1, pthread_t t2)
/*@*/;
extern int pthread_create(/*@out@*/ pthread_t *restrict thread,
const pthread_attr_t *restrict attr,
void *(*start_routine)(void*), void *restrict arg)
/*@modifies *thread @*/;
extern int pthread_join(pthread_t thread, /*@out@*/ void **value_ptr)
/*@modifies *value_ptr @*/;
extern int pthread_setcancelstate(int state, /*@out@*/ int *oldstate)
/*@globals internalState @*/
/*@modifies *oldstate, internalState @*/;
extern int pthread_setcanceltype(int type, /*@out@*/ int *oldtype)
/*@globals internalState @*/
/*@modifies *oldtype, internalState @*/;
extern void pthread_testcancel(void)
/*@globals internalState @*/
/*@modifies internalState @*/;
extern void pthread_cleanup_pop(int execute)
/*@globals internalState @*/
/*@modifies internalState @*/;
extern void pthread_cleanup_push(void (*routine)(void*), void *arg)
/*@globals internalState @*/
/*@modifies internalState @*/;
extern void _pthread_cleanup_pop(/*@out@*/ struct _pthread_cleanup_buffer *__buffer, int execute)
/*@globals internalState @*/
/*@modifies internalState @*/;
extern void _pthread_cleanup_push(/*@out@*/ struct _pthread_cleanup_buffer *__buffer, void (*routine)(void*), /*@out@*/ void *arg)
/*@globals internalState @*/
/*@modifies internalState @*/;
extern int pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
/*@globals errno, internalState @*/
/*@modifies *attr, errno, internalState @*/;
extern int pthread_mutexattr_init(/*@out@*/ pthread_mutexattr_t *attr)
/*@globals errno, internalState @*/
/*@modifies *attr, errno, internalState @*/;
int pthread_mutexattr_gettype(const pthread_mutexattr_t *restrict attr,
/*@out@*/ int *restrict type)
/*@modifies *type @*/;
int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
/*@globals errno, internalState @*/
/*@modifies *attr, errno, internalState @*/;
extern int pthread_mutex_destroy(pthread_mutex_t *mutex)
/*@modifies *mutex @*/;
extern int pthread_mutex_init(/*@out@*/ pthread_mutex_t *restrict mutex,
/*@null@*/ const pthread_mutexattr_t *restrict attr)
/*@globals errno, internalState @*/
/*@modifies *mutex, errno, internalState @*/;
extern int pthread_mutex_lock(pthread_mutex_t *mutex)
/*@globals errno @*/
/*@modifies *mutex, errno @*/;
extern int pthread_mutex_trylock(pthread_mutex_t *mutex)
/*@globals errno @*/
/*@modifies *mutex, errno @*/;
extern int pthread_mutex_unlock(pthread_mutex_t *mutex)
/*@globals errno @*/
/*@modifies *mutex, errno @*/;
extern int pthread_cond_destroy(pthread_cond_t *cond)
/*@modifies *cond @*/;
extern int pthread_cond_init(/*@out@*/ pthread_cond_t *restrict cond,
const pthread_condattr_t *restrict attr)
/*@globals errno, internalState @*/
/*@modifies *cond, errno, internalState @*/;
extern int pthread_cond_timedwait(pthread_cond_t *restrict cond,
pthread_mutex_t *restrict mutex,
const struct timespec *restrict abstime)
/*@modifies *cond, *mutex @*/;
extern int pthread_cond_wait(pthread_cond_t *restrict cond,
pthread_mutex_t *restrict mutex)
/*@modifies *cond, *mutex @*/;
extern int pthread_cond_broadcast(pthread_cond_t *cond)
/*@globals errno, internalState @*/
/*@modifies *cond, errno, internalState @*/;
extern int pthread_cond_signal(pthread_cond_t *cond)
/*@globals errno, internalState @*/
/*@modifies *cond, errno, internalState @*/;
/*@=exportheader@*/
/*@=incondefs =protoparammatch@*/
#endif
#include <signal.h>
#if !defined(__QNX__)
# include <sys/signal.h>
#endif
#include <sys/wait.h>
#include <search.h>
/* portability fallback for sighold(3) */
#if !defined(HAVE_SIGHOLD) && defined(HAVE_SIGPROCMASK) && defined(HAVE_SIGADDSET)
static int __RPM_sighold(int sig)
{
sigset_t set;
if (sigprocmask(SIG_SETMASK, NULL, &set) < 0)
return -1;
if (sigaddset(&set, sig) < 0)
return -1;
return sigprocmask(SIG_SETMASK, &set, NULL);
}
#define sighold(sig) __RPM_sighold(sig)
#endif
/* portability fallback for sigrelse(3) */
#if !defined(HAVE_SIGRELSE) && defined(HAVE_SIGPROCMASK) && defined(HAVE_SIGDELSET)
static int __RPM_sigrelse(int sig)
{
sigset_t set;
if (sigprocmask(SIG_SETMASK, NULL, &set) < 0)
return -1;
if (sigdelset(&set, sig) < 0)
return -1;
return sigprocmask(SIG_SETMASK, &set, NULL);
}
#define sigrelse(sig) __RPM_sigrelse(sig)
#endif
/* portability fallback for sigpause(3) */
#if !defined(HAVE_SIGPAUSE) && defined(HAVE_SIGEMPTYSET) && defined(HAVE_SIGADDSET) && defined(HAVE_SIGSUSPEND)
static int __RPM_sigpause(int sig)
{
sigset_t set;
if (sigemptyset(&set) < 0)
return -1;
if (sigaddset(&set, sig) < 0)
return -1;
return sigsuspend(&set);
}
#define sigpause(sig) __RPM_sigpause(sig)
#endif
/* portability fallback for insque(3)/remque(3) */
#if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__QNX__)
struct qelem {
struct qelem *q_forw;
struct qelem *q_back;
};
static void __insque(struct qelem * elem, struct qelem * pred)
{
elem -> q_forw = pred -> q_forw;
pred -> q_forw -> q_back = elem;
elem -> q_back = pred;
pred -> q_forw = elem;
}
#define insque(_e, _p) __insque((_e), (_p))
static void __remque(struct qelem * elem)
{
elem -> q_forw -> q_back = elem -> q_back;
elem -> q_back -> q_forw = elem -> q_forw;
}
#define remque(_e) __remque(_e)
#endif
#if defined(WITH_PTHREADS)
# if !defined(__QNX__)
/* XXX suggested in bugzilla #159024 */
# if PTHREAD_MUTEX_DEFAULT != PTHREAD_MUTEX_NORMAL
# error RPM expects PTHREAD_MUTEX_DEFAULT == PTHREAD_MUTEX_NORMAL
# endif
# endif
#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
/*@unchecked@*/
static pthread_mutex_t rpmsigTbl_lock = PTHREAD_MUTEX_INITIALIZER;
#else
/*@unchecked@*/
/*@-type@*/
static pthread_mutex_t rpmsigTbl_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
/*@=type@*/
#endif
/*@-macromatchname@*/
#define DO_LOCK() /*@-retvalint@*/pthread_mutex_lock(&rpmsigTbl_lock)/*@=retvalint@*/;
#define DO_UNLOCK() pthread_mutex_unlock(&rpmsigTbl_lock);
#define INIT_LOCK() \
{ pthread_mutexattr_t attr; \
(void) pthread_mutexattr_init(&attr); \
(void) pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); \
(void) pthread_mutex_init (&rpmsigTbl_lock, &attr); \
(void) pthread_mutexattr_destroy(&attr); \
rpmsigTbl_sigchld->active = 0; \
}
#define ADD_REF(__tbl) (__tbl)->active++
#define SUB_REF(__tbl) --(__tbl)->active
#define CLEANUP_HANDLER(__handler, __arg, __oldtypeptr) \
(void) pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, (__oldtypeptr));\
pthread_cleanup_push((__handler), (__arg));
#define CLEANUP_RESET(__execute, __oldtype) \
pthread_cleanup_pop(__execute); \
(void) pthread_setcanceltype ((__oldtype), &(__oldtype));
#define SAME_THREAD(_a, _b) pthread_equal(((pthread_t)_a), ((pthread_t)_b))
/*@-macromatchname@*/
#define ME() __tid2vp(pthread_self())
/*@shared@*/
static void *__tid2vp(pthread_t tid)
/*@*/
{
union { pthread_t tid; /*@shared@*/ void *vp; } u;
u.tid = tid;
return u.vp;
}
#else
/*@-macromatchname@*/
#define DO_LOCK() (0)
#define DO_UNLOCK() (0)
#define INIT_LOCK()
#define ADD_REF(__tbl) /*@-noeffect@*/ (0) /*@=noeffect@*/
#define SUB_REF(__tbl) /*@-noeffect@*/ (0) /*@=noeffect@*/
#define CLEANUP_HANDLER(__handler, __arg, __oldtypeptr)
#define CLEANUP_RESET(__execute, __oldtype)
#define SAME_THREAD(_a, _b) (42)
/*@=macromatchname@*/
#define ME() __pid2vp(getpid())
/*@shared@*/
static void *__pid2vp(pid_t pid)
/*@*/
{
union { pid_t pid; /*@shared@*/ void *vp; } u;
u.pid = pid;
return u.vp;
}
#endif /* WITH_PTHREADS */
#define _RPMSQ_INTERNAL
#include <rpmsq.h>
#include "debug.h"
#define _RPMSQ_DEBUG 0
/*@unchecked@*/
int _rpmsq_debug = _RPMSQ_DEBUG;
/* XXX __OpenBSD__ insque(3) needs rock->q_forw initialized. */
/*@unchecked@*/
/*@-fullinitblock @*/
static struct rpmsqElem rpmsqRock = { .q_forw = &rpmsqRock };
/*@=fullinitblock @*/
/*@-compmempass@*/
/*@unchecked@*/
rpmsq rpmsqQueue = &rpmsqRock;
/*@=compmempass@*/
int rpmsqInsert(void * elem, void * prev)
{
rpmsq sq = (rpmsq) elem;
int ret = -1;
if (sq != NULL) {
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Insert(%p): %p\n", ME(), sq);
#endif
ret = sighold(SIGCHLD);
if (ret == 0) {
sq->child = 0;
sq->reaped = 0;
sq->status = 0;
/* ==> Set to 1 to catch SIGCHLD, set to 0 to use waitpid(2). */
sq->reaper = 1;
sq->pipes[0] = sq->pipes[1] = -1;
sq->id = ME();
/*@-noeffect@*/
insque(elem, (prev != NULL ? prev : rpmsqQueue));
/*@=noeffect@*/
ret = sigrelse(SIGCHLD);
}
}
return ret;
}
int rpmsqRemove(void * elem)
{
rpmsq sq = (rpmsq) elem;
int ret = -1;
if (elem != NULL) {
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Remove(%p): %p\n", ME(), sq);
#endif
ret = sighold (SIGCHLD);
if (ret == 0) {
/*@-noeffect@*/
remque(elem);
/*@=noeffect@*/
sq->id = NULL;
if (sq->pipes[1] > 0) ret = close(sq->pipes[1]);
if (sq->pipes[0] > 0) ret = close(sq->pipes[0]);
sq->pipes[0] = sq->pipes[1] = -1;
#ifdef NOTYET /* rpmpsmWait debugging message needs */
sq->status = 0;
sq->reaped = 0;
sq->child = 0;
#endif
ret = sigrelse(SIGCHLD);
}
}
return ret;
}
/*@unchecked@*/
sigset_t rpmsqCaught;
/*@unchecked@*/
/*@-fullinitblock@*/
static struct rpmsig_s {
int signum;
void (*handler) (int signum, void * info, void * context);
int active;
struct sigaction oact;
} rpmsigTbl[] = {
{ SIGINT, rpmsqAction },
#define rpmsigTbl_sigint (&rpmsigTbl[0])
{ SIGQUIT, rpmsqAction },
#define rpmsigTbl_sigquit (&rpmsigTbl[1])
{ SIGCHLD, rpmsqAction },
#define rpmsigTbl_sigchld (&rpmsigTbl[2])
{ SIGHUP, rpmsqAction },
#define rpmsigTbl_sighup (&rpmsigTbl[3]) /* XXX unused */
{ SIGTERM, rpmsqAction },
#define rpmsigTbl_sigterm (&rpmsigTbl[4]) /* XXX unused */
{ SIGPIPE, rpmsqAction },
#define rpmsigTbl_sigpipe (&rpmsigTbl[5]) /* XXX unused */
#ifdef NOTYET /* XXX todo++ */
#if defined(SIGXCPU)
{ SIGXCPU, rpmsqAction },
#define rpmsigTbl_sigxcpu (&rpmsigTbl[6]) /* XXX unused */
#endif
#if defined(SIGXFSZ)
{ SIGXFSZ, rpmsqAction },
#define rpmsigTbl_sigxfsz (&rpmsigTbl[7]) /* XXX unused */
#endif
#endif
{ -1, NULL },
};
/*@=fullinitblock@*/
void rpmsqAction(int signum, /*@unused@*/ void * info,
/*@unused@*/ void * context)
{
int save = errno;
rpmsig tbl;
for (tbl = rpmsigTbl; tbl->signum >= 0; tbl++) {
if (tbl->signum != signum)
continue;
(void) sigaddset(&rpmsqCaught, signum);
switch (signum) {
case SIGCHLD:
while (1) {
rpmsq sq;
int status = 0;
pid_t reaped = waitpid(0, &status, WNOHANG);
/* XXX errno set to ECHILD/EINVAL/EINTR. */
if (reaped <= 0)
/*@innerbreak@*/ break;
/* XXX insque(3)/remque(3) are dequeue, not ring. */
for (sq = rpmsqQueue->q_forw;
sq != NULL && sq != rpmsqQueue;
sq = sq->q_forw)
{
int ret;
if (sq->child != reaped)
/*@innercontinue@*/ continue;
sq->reaped = reaped;
sq->status = status;
ret = close(sq->pipes[1]); sq->pipes[1] = -1;
/*@innerbreak@*/ break;
}
}
/*@switchbreak@*/ break;
default:
/*@switchbreak@*/ break;
}
break;
}
errno = save;
}
int rpmsqEnable(int signum, /*@null@*/ rpmsqAction_t handler)
/*@globals rpmsigTbl @*/
/*@modifies rpmsigTbl @*/
{
int tblsignum = (signum >= 0 ? signum : -signum);
struct sigaction sa;
rpmsig tbl;
int ret = -1;
int xx;
xx = DO_LOCK ();
if (rpmsqQueue->id == NULL)
rpmsqQueue->id = ME();
for (tbl = rpmsigTbl; tbl->signum >= 0; tbl++) {
if (tblsignum != tbl->signum)
continue;
if (signum >= 0) { /* Enable. */
if (ADD_REF(tbl) <= 0) {
(void) sigdelset(&rpmsqCaught, tbl->signum);
/* XXX Don't set a signal handler if already SIG_IGN */
(void) sigaction(tbl->signum, NULL, &tbl->oact);
if (tbl->oact.sa_handler == SIG_IGN)
continue;
(void) sigemptyset (&sa.sa_mask);
sa.sa_flags = SA_SIGINFO;
#if defined(__LCLINT__) /* XXX glibc has union to track handler prototype. */
sa.sa_handler = (handler != NULL ? handler : tbl->handler);
#else
sa.sa_sigaction = (void *) (handler != NULL ? handler : tbl->handler);
#endif
if (sigaction(tbl->signum, &sa, &tbl->oact) < 0) {
xx = SUB_REF(tbl);
break;
}
tbl->active = 1; /* XXX just in case */
if (handler != NULL)
tbl->handler = handler;
}
} else { /* Disable. */
if (SUB_REF(tbl) <= 0) {
if (sigaction(tbl->signum, &tbl->oact, NULL) < 0)
break;
tbl->active = 0; /* XXX just in case */
tbl->handler = (handler != NULL ? handler : rpmsqAction);
}
}
ret = tbl->active;
break;
}
xx = DO_UNLOCK ();
return ret;
}
pid_t rpmsqFork(rpmsq sq)
{
pid_t pid;
int xx;
if (sq->reaper) {
xx = rpmsqInsert(sq, NULL);
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Enable(%p): %p\n", ME(), sq);
#endif
xx = rpmsqEnable(SIGCHLD, NULL);
}
xx = pipe(sq->pipes);
xx = sighold(SIGCHLD);
pid = fork();
if (pid < (pid_t) 0) { /* fork failed. */
sq->child = (pid_t)-1;
xx = close(sq->pipes[0]);
xx = close(sq->pipes[1]);
sq->pipes[0] = sq->pipes[1] = -1;
goto out;
} else if (pid == (pid_t) 0) { /* Child. */
int yy;
/* Block to permit parent time to wait. */
xx = close(sq->pipes[1]);
if (sq->reaper)
xx = (int)read(sq->pipes[0], &yy, sizeof(yy));
xx = close(sq->pipes[0]);
sq->pipes[0] = sq->pipes[1] = -1;
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Child(%p): %p child %d\n", ME(), sq, (int)getpid());
#endif
} else { /* Parent. */
sq->child = pid;
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Parent(%p): %p child %d\n", ME(), sq, (int)sq->child);
#endif
}
out:
xx = sigrelse(SIGCHLD);
return sq->child;
}
static int rpmsqWaitUnregister(rpmsq sq)
/*@globals fileSystem, internalState @*/
/*@modifies sq, fileSystem, internalState @*/
{
int nothreads = 0;
int ret = 0;
int xx;
assert(sq->reaper);
/* Protect sq->reaped from handler changes. */
ret = sighold(SIGCHLD);
/* Start the child, linux often runs child before parent. */
if (sq->pipes[0] >= 0)
xx = close(sq->pipes[0]);
if (sq->pipes[1] >= 0)
xx = close(sq->pipes[1]);
/* Re-initialize the pipe to receive SIGCHLD receipt confirmation. */
xx = pipe(sq->pipes);
/* Put a stopwatch on the time spent waiting to measure performance gain. */
(void) rpmswEnter(&sq->op, -1);
/* Wait for handler to receive SIGCHLD. */
/*@-infloops@*/
while (ret == 0 && sq->reaped != sq->child) {
if (nothreads)
/* Note that sigpause re-enables SIGCHLD. */
ret = sigpause(SIGCHLD);
else {
xx = sigrelse(SIGCHLD);
/* Signal handler does close(sq->pipes[1]) triggering 0b EOF read */
if (read(sq->pipes[0], &xx, sizeof(xx)) == 0) {
xx = close(sq->pipes[0]); sq->pipes[0] = -1;
ret = 1;
}
xx = sighold(SIGCHLD);
}
}
/*@=infloops@*/
/* Accumulate stopwatch time spent waiting, potential performance gain. */
sq->ms_scriptlets += rpmswExit(&sq->op, -1)/1000;
xx = sigrelse(SIGCHLD);
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Wake(%p): %p child %d reaper %d ret %d\n", ME(), sq, (int)sq->child, sq->reaper, ret);
#endif
/* Remove processed SIGCHLD item from queue. */
xx = rpmsqRemove(sq);
/* Disable SIGCHLD handler on refcount == 0. */
xx = rpmsqEnable(-SIGCHLD, NULL);
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Disable(%p): %p\n", ME(), sq);
#endif
return ret;
}
pid_t rpmsqWait(rpmsq sq)
{
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Wait(%p): %p child %d reaper %d\n", ME(), sq, (int)sq->child, sq->reaper);
#endif
if (sq->reaper) {
(void) rpmsqWaitUnregister(sq);
} else {
pid_t reaped;
int status;
do {
reaped = waitpid(sq->child, &status, 0);
} while (reaped >= 0 && reaped != sq->child);
sq->reaped = reaped;
sq->status = status;
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Waitpid(%p): %p child %d reaped %d\n", ME(), sq, (int)sq->child, (int)sq->reaped);
#endif
}
#ifdef _RPMSQ_DEBUG
if (_rpmsq_debug)
fprintf(stderr, " Fini(%p): %p child %d status 0x%x\n", ME(), sq, (int)sq->child, sq->status);
#endif
return sq->reaped;
}
void * rpmsqThread(void * (*start) (void * arg), void * arg)
{
#if defined(WITH_PTHREADS)
pthread_t pth;
int ret;
ret = pthread_create(&pth, NULL, start, arg);
return (ret == 0 ? (void *)pth : NULL);
#else
(void) start;
(void) arg;
return NULL;
#endif
}
int rpmsqJoin(void * thread)
{
#if defined(WITH_PTHREADS)
pthread_t pth = (pthread_t) thread;
if (thread == NULL)
return EINVAL;
return pthread_join(pth, NULL);
#else
(void) thread;
return EINVAL;
#endif
}
int rpmsqThreadEqual(void * thread)
{
#if defined(WITH_PTHREADS)
pthread_t t1 = (pthread_t) thread;
pthread_t t2 = pthread_self();
return pthread_equal(t1, t2);
#else
(void) thread;
return 0;
#endif
}
#if defined(WITH_PTHREADS)
static void
sigchld_cancel (void *arg)
/*@globals rpmsigTbl, fileSystem, internalState @*/
/*@modifies rpmsigTbl, fileSystem, internalState @*/
{
pid_t child = *(pid_t *) arg;
pid_t result;
int xx;
xx = kill(child, SIGKILL);
do {
result = waitpid(child, NULL, 0);
} while (result == (pid_t)-1 && errno == EINTR);
xx = DO_LOCK ();
if (SUB_REF (rpmsigTbl_sigchld) == 0) {
xx = rpmsqEnable(-SIGQUIT, NULL);
xx = rpmsqEnable(-SIGINT, NULL);
}
xx = DO_UNLOCK ();
}
#endif
int
rpmsqExecve (const char ** argv)
/*@globals rpmsigTbl @*/
/*@modifies rpmsigTbl @*/
{
#if defined(WITH_PTHREADS)
int oldtype;
#endif
int status = -1;
pid_t pid = 0;
pid_t result;
sigset_t newMask, oldMask;
rpmsq sq = memset(alloca(sizeof(*sq)), 0, sizeof(*sq));
int xx;
#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
INIT_LOCK ();
#endif
xx = DO_LOCK ();
if (ADD_REF (rpmsigTbl_sigchld) == 0) {
if (rpmsqEnable(SIGINT, NULL) < 0) {
xx = SUB_REF (rpmsigTbl_sigchld);
goto out;
}
if (rpmsqEnable(SIGQUIT, NULL) < 0) {
xx = SUB_REF (rpmsigTbl_sigchld);
goto out_restore_sigint;
}
}
xx = DO_UNLOCK ();
(void) sigemptyset (&newMask);
(void) sigaddset (&newMask, SIGCHLD);
if (sigprocmask (SIG_BLOCK, &newMask, &oldMask) < 0) {
xx = DO_LOCK ();
if (SUB_REF (rpmsigTbl_sigchld) == 0)
goto out_restore_sigquit_and_sigint;
goto out;
}
/*@-sysunrecog@*/
CLEANUP_HANDLER(sigchld_cancel, &pid, &oldtype);
/*@=sysunrecog@*/
pid = fork ();
if (pid < (pid_t) 0) { /* fork failed. */
goto out;
} else if (pid == (pid_t) 0) { /* Child. */
/* Restore the signals. */
(void) sigaction (SIGINT, &rpmsigTbl_sigint->oact, NULL);
(void) sigaction (SIGQUIT, &rpmsigTbl_sigquit->oact, NULL);
(void) sigprocmask (SIG_SETMASK, &oldMask, NULL);
/* Reset rpmsigTbl lock and refcnt. */
INIT_LOCK ();
(void) execve (argv[0], (char *const *) argv, environ);
_exit (127);
} else { /* Parent. */
do {
result = waitpid(pid, &status, 0);
} while (result == (pid_t)-1 && errno == EINTR);
if (result != pid)
status = -1;
}
CLEANUP_RESET(0, oldtype);
xx = DO_LOCK ();
if ((SUB_REF (rpmsigTbl_sigchld) == 0 &&
(rpmsqEnable(-SIGINT, NULL) < 0 || rpmsqEnable (-SIGQUIT, NULL) < 0))
|| sigprocmask (SIG_SETMASK, &oldMask, NULL) != 0)
{
status = -1;
}
goto out;
out_restore_sigquit_and_sigint:
xx = rpmsqEnable(-SIGQUIT, NULL);
out_restore_sigint:
xx = rpmsqEnable(-SIGINT, NULL);
out:
xx = DO_UNLOCK ();
return status;
}