version 1.28, 2003/09/15 22:30:38 |
version 1.32, 2012/06/25 22:32:43 |
Line 54 __RCSID("$NetBSD$"); |
|
Line 54 __RCSID("$NetBSD$"); |
|
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
#include <unistd.h> |
#include <unistd.h> |
|
#include <fcntl.h> |
|
|
|
#include "env.h" |
#include "reentrant.h" |
#include "reentrant.h" |
|
|
#ifdef __weak_alias |
#ifdef __weak_alias |
Line 61 __weak_alias(popen,_popen) |
|
Line 64 __weak_alias(popen,_popen) |
|
__weak_alias(pclose,_pclose) |
__weak_alias(pclose,_pclose) |
#endif |
#endif |
|
|
#ifdef _REENTRANT |
|
extern rwlock_t __environ_lock; |
|
#endif |
|
|
|
static struct pid { |
static struct pid { |
struct pid *next; |
struct pid *next; |
FILE *fp; |
FILE *fp; |
Line 79 static rwlock_t pidlist_lock = RWLOCK_IN |
|
Line 78 static rwlock_t pidlist_lock = RWLOCK_IN |
|
#endif |
#endif |
|
|
FILE * |
FILE * |
popen(command, type) |
popen(const char *command, const char *type) |
const char *command, *type; |
|
{ |
{ |
struct pid *cur, *old; |
struct pid *cur, *old; |
FILE *iop; |
FILE *iop; |
int pdes[2], pid, twoway, serrno; |
const char * volatile xtype = type; |
|
int pdes[2], pid, serrno; |
|
volatile int twoway; |
|
int flags; |
|
|
_DIAGASSERT(command != NULL); |
_DIAGASSERT(command != NULL); |
_DIAGASSERT(type != NULL); |
_DIAGASSERT(xtype != NULL); |
|
|
#ifdef __GNUC__ |
flags = strchr(xtype, 'e') ? O_CLOEXEC : 0; |
/* This outrageous construct just to shut up a GCC warning. */ |
if (strchr(xtype, '+')) { |
(void) &cur; (void) &twoway; (void) &type; |
int stype = flags ? (SOCK_STREAM | SOCK_CLOEXEC) : SOCK_STREAM; |
#endif |
|
|
|
if (strchr(type, '+')) { |
|
twoway = 1; |
twoway = 1; |
type = "r+"; |
xtype = "r+"; |
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, pdes) < 0) |
if (socketpair(AF_LOCAL, stype, 0, pdes) < 0) |
return (NULL); |
return NULL; |
} else { |
} else { |
twoway = 0; |
twoway = 0; |
if ((*type != 'r' && *type != 'w') || type[1] || |
xtype = strrchr(xtype, 'r') ? "r" : "w"; |
(pipe(pdes) < 0)) { |
if (pipe2(pdes, flags) == -1) |
errno = EINVAL; |
return NULL; |
return (NULL); |
|
} |
|
} |
} |
|
|
if ((cur = malloc(sizeof(struct pid))) == NULL) { |
if ((cur = malloc(sizeof(struct pid))) == NULL) { |
Line 115 popen(command, type) |
|
Line 111 popen(command, type) |
|
return (NULL); |
return (NULL); |
} |
} |
|
|
rwlock_rdlock(&pidlist_lock); |
(void)rwlock_rdlock(&pidlist_lock); |
rwlock_rdlock(&__environ_lock); |
(void)__readlockenv(); |
switch (pid = vfork()) { |
switch (pid = vfork()) { |
case -1: /* Error. */ |
case -1: /* Error. */ |
serrno = errno; |
serrno = errno; |
rwlock_unlock(&__environ_lock); |
(void)__unlockenv(); |
rwlock_unlock(&pidlist_lock); |
(void)rwlock_unlock(&pidlist_lock); |
free(cur); |
free(cur); |
(void)close(pdes[0]); |
(void)close(pdes[0]); |
(void)close(pdes[1]); |
(void)close(pdes[1]); |
Line 139 popen(command, type) |
|
Line 135 popen(command, type) |
|
close(fileno(old->fp)); /* don't allow a flush */ |
close(fileno(old->fp)); /* don't allow a flush */ |
#endif |
#endif |
|
|
if (*type == 'r') { |
if (*xtype == 'r') { |
(void)close(pdes[0]); |
(void)close(pdes[0]); |
if (pdes[1] != STDOUT_FILENO) { |
if (pdes[1] != STDOUT_FILENO) { |
(void)dup2(pdes[1], STDOUT_FILENO); |
(void)dup2(pdes[1], STDOUT_FILENO); |
Line 159 popen(command, type) |
|
Line 155 popen(command, type) |
|
_exit(127); |
_exit(127); |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
rwlock_unlock(&__environ_lock); |
(void)__unlockenv(); |
|
|
/* Parent; assume fdopen can't fail. */ |
/* Parent; assume fdopen can't fail. */ |
if (*type == 'r') { |
if (*xtype == 'r') { |
iop = fdopen(pdes[0], type); |
iop = fdopen(pdes[0], xtype); |
#ifdef _REENTRANT |
#ifdef _REENTRANT |
cur->fd = pdes[0]; |
cur->fd = pdes[0]; |
#endif |
#endif |
(void)close(pdes[1]); |
(void)close(pdes[1]); |
} else { |
} else { |
iop = fdopen(pdes[1], type); |
iop = fdopen(pdes[1], xtype); |
#ifdef _REENTRANT |
#ifdef _REENTRANT |
cur->fd = pdes[1]; |
cur->fd = pdes[1]; |
#endif |
#endif |
Line 181 popen(command, type) |
|
Line 177 popen(command, type) |
|
cur->pid = pid; |
cur->pid = pid; |
cur->next = pidlist; |
cur->next = pidlist; |
pidlist = cur; |
pidlist = cur; |
rwlock_unlock(&pidlist_lock); |
(void)rwlock_unlock(&pidlist_lock); |
|
|
return (iop); |
return (iop); |
} |
} |
Line 192 popen(command, type) |
|
Line 188 popen(command, type) |
|
* if already `pclosed', or waitpid returns an error. |
* if already `pclosed', or waitpid returns an error. |
*/ |
*/ |
int |
int |
pclose(iop) |
pclose(FILE *iop) |
FILE *iop; |
|
{ |
{ |
struct pid *cur, *last; |
struct pid *cur, *last; |
int pstat; |
int pstat; |
|
|
if (cur->fp == iop) |
if (cur->fp == iop) |
break; |
break; |
if (cur == NULL) { |
if (cur == NULL) { |
rwlock_unlock(&pidlist_lock); |
(void)rwlock_unlock(&pidlist_lock); |
return (-1); |
return (-1); |
} |
} |
|
|
|
|
else |
else |
last->next = cur->next; |
last->next = cur->next; |
|
|
rwlock_unlock(&pidlist_lock); |
(void)rwlock_unlock(&pidlist_lock); |
|
|
do { |
do { |
pid = waitpid(cur->pid, &pstat, 0); |
pid = waitpid(cur->pid, &pstat, 0); |