Add POSIX routines called posix_spawn() and posix_spawnp(), which
can be used as replacements for exec/fork in a lot of cases. This change also added execvpe() which allows environment variable PATH to be used for searching executable file, it is used for implementing posix_spawnp(). PR: standards/122051
This commit is contained in:
parent
aec9f8e993
commit
947aa542e9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=179838
@ -19,7 +19,7 @@ INCS= a.out.h ar.h assert.h bitstring.h complex.h cpio.h _ctype.h ctype.h \
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printf.h proc_service.h pthread.h \
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printf.h proc_service.h pthread.h \
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pthread_np.h pwd.h ranlib.h readpassphrase.h regex.h regexp.h \
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pthread_np.h pwd.h ranlib.h readpassphrase.h regex.h regexp.h \
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res_update.h resolv.h runetype.h search.h setjmp.h sgtty.h \
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res_update.h resolv.h runetype.h search.h setjmp.h sgtty.h \
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signal.h stab.h \
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signal.h spawn.h stab.h \
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stdbool.h stddef.h stdio.h stdlib.h string.h stringlist.h \
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stdbool.h stddef.h stdio.h stdlib.h string.h stringlist.h \
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strings.h sysexits.h tar.h tgmath.h \
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strings.h sysexits.h tar.h tgmath.h \
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time.h timeconv.h timers.h ttyent.h \
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time.h timeconv.h timers.h ttyent.h \
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115
include/spawn.h
Normal file
115
include/spawn.h
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@ -0,0 +1,115 @@
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/*-
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* Copyright (c) 2008 Ed Schouten <ed@80386.nl>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SPAWN_H_
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#define _SPAWN_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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#include <sys/_sigset.h>
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#ifndef _MODE_T_DECLARED
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typedef __mode_t mode_t;
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#define _MODE_T_DECLARED
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#endif
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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#ifndef _SIGSET_T_DECLARED
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#define _SIGSET_T_DECLARED
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typedef __sigset_t sigset_t;
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#endif
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struct sched_param;
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typedef struct __posix_spawnattr *posix_spawnattr_t;
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typedef struct __posix_spawn_file_actions *posix_spawn_file_actions_t;
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#define POSIX_SPAWN_RESETIDS 0x01
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#define POSIX_SPAWN_SETPGROUP 0x02
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#define POSIX_SPAWN_SETSCHEDPARAM 0x04
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#define POSIX_SPAWN_SETSCHEDULER 0x08
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#define POSIX_SPAWN_SETSIGDEF 0x10
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#define POSIX_SPAWN_SETSIGMASK 0x20
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__BEGIN_DECLS
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/*
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* Spawn routines
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*/
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int posix_spawn(pid_t * __restrict, const char * __restrict,
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const posix_spawn_file_actions_t *, const posix_spawnattr_t * __restrict,
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char * const [__restrict], char * const [__restrict]);
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int posix_spawnp(pid_t * __restrict, const char * __restrict,
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const posix_spawn_file_actions_t *, const posix_spawnattr_t * __restrict,
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char * const [__restrict], char * const [__restrict]);
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/*
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* File descriptor actions
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*/
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int posix_spawn_file_actions_init(posix_spawn_file_actions_t *);
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int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *);
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int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict,
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int, const char * __restrict, int, mode_t);
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int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *, int, int);
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int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *, int);
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/*
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* Spawn attributes
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*/
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int posix_spawnattr_init(posix_spawnattr_t *);
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int posix_spawnattr_destroy(posix_spawnattr_t *);
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int posix_spawnattr_getflags(const posix_spawnattr_t * __restrict,
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short * __restrict);
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int posix_spawnattr_getpgroup(const posix_spawnattr_t * __restrict,
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pid_t * __restrict);
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int posix_spawnattr_getschedparam(const posix_spawnattr_t * __restrict,
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struct sched_param * __restrict);
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int posix_spawnattr_getschedpolicy(const posix_spawnattr_t * __restrict,
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int * __restrict);
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int posix_spawnattr_getsigdefault(const posix_spawnattr_t * __restrict,
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sigset_t * __restrict);
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int posix_spawnattr_getsigmask(const posix_spawnattr_t * __restrict,
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sigset_t * __restrict sigmask);
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int posix_spawnattr_setflags(posix_spawnattr_t *, short);
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int posix_spawnattr_setpgroup(posix_spawnattr_t *, pid_t);
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int posix_spawnattr_setschedparam(posix_spawnattr_t * __restrict,
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const struct sched_param * __restrict);
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int posix_spawnattr_setschedpolicy(posix_spawnattr_t *, int);
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int posix_spawnattr_setsigdefault(posix_spawnattr_t * __restrict,
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const sigset_t * __restrict);
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int posix_spawnattr_setsigmask(posix_spawnattr_t * __restrict,
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const sigset_t * __restrict);
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__END_DECLS
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#endif /* !_SPAWN_H_ */
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@ -335,6 +335,7 @@ int execlp(const char *, const char *, ...);
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int execv(const char *, char * const *);
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int execv(const char *, char * const *);
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int execve(const char *, char * const *, char * const *);
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int execve(const char *, char * const *, char * const *);
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int execvp(const char *, char * const *);
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int execvp(const char *, char * const *);
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int execvpe(const char *, char * const *, char * const *);
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pid_t fork(void);
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pid_t fork(void);
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long fpathconf(int, int);
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long fpathconf(int, int);
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char *getcwd(char *, size_t);
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char *getcwd(char *, size_t);
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@ -21,7 +21,7 @@ SRCS+= __getosreldate.c __xuname.c \
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initgroups.c isatty.c isinf.c isnan.c jrand48.c lcong48.c \
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initgroups.c isatty.c isinf.c isnan.c jrand48.c lcong48.c \
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lockf.c lrand48.c mrand48.c nftw.c nice.c \
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lockf.c lrand48.c mrand48.c nftw.c nice.c \
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nlist.c nrand48.c opendir.c \
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nlist.c nrand48.c opendir.c \
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pause.c pmadvise.c popen.c pselect.c \
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pause.c pmadvise.c popen.c posix_spawn.c pselect.c \
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psignal.c pw_scan.c pwcache.c \
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psignal.c pw_scan.c pwcache.c \
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raise.c readdir.c readpassphrase.c rewinddir.c \
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raise.c readdir.c readpassphrase.c rewinddir.c \
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scandir.c seed48.c seekdir.c sem.c semctl.c \
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scandir.c seed48.c seekdir.c sem.c semctl.c \
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@ -81,7 +81,7 @@ MLINKS+=err.3 err_set_exit.3 err.3 err_set_file.3 err.3 errc.3 err.3 errx.3 \
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err.3 verr.3 err.3 verrc.3 err.3 verrx.3 err.3 vwarn.3 err.3 vwarnc.3 \
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err.3 verr.3 err.3 verrc.3 err.3 verrx.3 err.3 vwarn.3 err.3 vwarnc.3 \
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err.3 vwarnx.3 err.3 warnc.3 err.3 warn.3 err.3 warnx.3
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err.3 vwarnx.3 err.3 warnc.3 err.3 warn.3 err.3 warnx.3
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MLINKS+=exec.3 execl.3 exec.3 execle.3 exec.3 execlp.3 exec.3 exect.3 \
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MLINKS+=exec.3 execl.3 exec.3 execle.3 exec.3 execlp.3 exec.3 exect.3 \
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exec.3 execv.3 exec.3 execvp.3 exec.3 execvP.3
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exec.3 execv.3 exec.3 execvP.3 exec.3 execvp.3 exec.3 execvpe.3
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MLINKS+=fpclassify.3 finite.3 fpclassify.3 finitef.3 \
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MLINKS+=fpclassify.3 finite.3 fpclassify.3 finitef.3 \
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fpclassify.3 isfinite.3 fpclassify.3 isinf.3 fpclassify.3 isnan.3 \
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fpclassify.3 isfinite.3 fpclassify.3 isinf.3 fpclassify.3 isnan.3 \
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fpclassify.3 isnormal.3
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fpclassify.3 isnormal.3
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@ -329,6 +329,7 @@ FBSD_1.0 {
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};
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};
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FBSD_1.1 {
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FBSD_1.1 {
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execvpe;
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fdopendir;
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fdopendir;
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fts_open;
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fts_open;
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fts_close;
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fts_close;
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@ -339,6 +340,27 @@ FBSD_1.1 {
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fts_get_stream;
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fts_get_stream;
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fts_set_clientptr;
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fts_set_clientptr;
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tcgetsid;
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tcgetsid;
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posix_spawn;
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posix_spawn_file_actions_addclose;
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posix_spawn_file_actions_adddup2;
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posix_spawn_file_actions_addopen;
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posix_spawn_file_actions_destroy;
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posix_spawn_file_actions_init;
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posix_spawnattr_destroy;
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posix_spawnattr_getflags;
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posix_spawnattr_getpgroup;
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posix_spawnattr_getschedparam;
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posix_spawnattr_getschedpolicy;
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posix_spawnattr_getsigdefault;
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posix_spawnattr_getsigmask;
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posix_spawnattr_init;
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posix_spawnattr_setflags;
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posix_spawnattr_setpgroup;
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posix_spawnattr_setschedparam;
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posix_spawnattr_setschedpolicy;
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posix_spawnattr_setsigdefault;
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posix_spawnattr_setsigmask;
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posix_spawnp;
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};
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};
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FBSDprivate_1.0 {
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FBSDprivate_1.0 {
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@ -38,6 +38,7 @@
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.Nm exect ,
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.Nm exect ,
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.Nm execv ,
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.Nm execv ,
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.Nm execvp ,
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.Nm execvp ,
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.Nm execvpe ,
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.Nm execvP
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.Nm execvP
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.Nd execute a file
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.Nd execute a file
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.Sh LIBRARY
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.Sh LIBRARY
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@ -64,6 +65,8 @@
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.Ft int
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.Ft int
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.Fn execvp "const char *file" "char *const argv[]"
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.Fn execvp "const char *file" "char *const argv[]"
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.Ft int
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.Ft int
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.Fn execvpe "const char *file" "char *const argv[]" "char *const envp[]"
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.Ft int
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.Fn execvP "const char *file" "const char *search_path" "char *const argv[]"
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.Fn execvP "const char *file" "const char *search_path" "char *const argv[]"
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.Sh DESCRIPTION
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.Sh DESCRIPTION
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The
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The
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@ -118,9 +121,10 @@ be terminated by a
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pointer.
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pointer.
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.Pp
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.Pp
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The
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The
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.Fn execle
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.Fn execle ,
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and
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.Fn exect
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.Fn exect
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and
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.Fn execvpe
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functions also specify the environment of the executed process by following
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functions also specify the environment of the executed process by following
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the
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the
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.Dv NULL
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.Dv NULL
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@ -142,6 +146,7 @@ Some of these functions have special semantics.
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The functions
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The functions
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.Fn execlp ,
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.Fn execlp ,
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.Fn execvp ,
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.Fn execvp ,
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.Fn execvpe ,
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and
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and
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.Fn execvP
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.Fn execvP
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will duplicate the actions of the shell in searching for an executable file
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will duplicate the actions of the shell in searching for an executable file
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@ -152,6 +157,7 @@ For
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.Fn execlp
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.Fn execlp
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and
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and
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.Fn execvp ,
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.Fn execvp ,
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.Fn execvpe ,
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search path is the path specified in the environment by
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search path is the path specified in the environment by
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.Dq Ev PATH
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.Dq Ev PATH
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variable.
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variable.
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@ -277,7 +283,8 @@ The
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.Fn execl ,
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.Fn execl ,
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.Fn execle ,
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.Fn execle ,
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.Fn execlp ,
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.Fn execlp ,
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.Fn execvp
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.Fn execvp ,
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.Fn execvpe
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and
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and
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.Fn execvP
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.Fn execvP
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functions
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functions
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@ -319,3 +326,7 @@ The
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.Fn execvP
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.Fn execvP
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function first appeared in
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function first appeared in
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.Fx 5.2 .
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.Fx 5.2 .
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The
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.Fn execvpe
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function first appeared in
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.Fx 8.0 .
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@ -140,20 +140,15 @@ execv(name, argv)
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int
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int
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execvp(const char *name, char * const *argv)
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execvp(const char *name, char * const *argv)
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{
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{
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const char *path;
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return (execvpe(name, argv, environ));
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/* Get the path we're searching. */
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if ((path = getenv("PATH")) == NULL)
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path = _PATH_DEFPATH;
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return (execvP(name, path, argv));
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}
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}
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int
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static int
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execvP(name, path, argv)
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execvPe(name, path, argv, envp)
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const char *name;
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const char *name;
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const char *path;
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const char *path;
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char * const *argv;
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char * const *argv;
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char * const *envp;
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{
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{
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char **memp;
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char **memp;
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int cnt, lp, ln;
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int cnt, lp, ln;
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@ -269,3 +264,21 @@ retry: (void)_execve(bp, argv, environ);
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done:
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done:
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return (-1);
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return (-1);
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}
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}
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int
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execvP(const char *name, const char *path, char * const argv[])
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{
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return execvPe(name, path, argv, environ);
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}
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int
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execvpe(const char *name, char * const argv[], char * const envp[])
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{
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const char *path;
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/* Get the path we're searching. */
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if ((path = getenv("PATH")) == NULL)
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path = _PATH_DEFPATH;
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return (execvPe(name, path, argv, envp));
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}
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|
472
lib/libc/gen/posix_spawn.c
Normal file
472
lib/libc/gen/posix_spawn.c
Normal file
@ -0,0 +1,472 @@
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|
/*-
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|
* Copyright (c) 2008 Ed Schouten <ed@80386.nl>
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* All rights reserved.
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|
*
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|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
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||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <sys/cdefs.h>
|
||||||
|
__FBSDID("$FreeBSD$");
|
||||||
|
|
||||||
|
#include "namespace.h"
|
||||||
|
#include <sys/queue.h>
|
||||||
|
|
||||||
|
#include <errno.h>
|
||||||
|
#include <fcntl.h>
|
||||||
|
#include <sched.h>
|
||||||
|
#include <spawn.h>
|
||||||
|
#include <signal.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include "un-namespace.h"
|
||||||
|
|
||||||
|
extern char **environ;
|
||||||
|
|
||||||
|
struct __posix_spawnattr {
|
||||||
|
short sa_flags;
|
||||||
|
pid_t sa_pgroup;
|
||||||
|
struct sched_param sa_schedparam;
|
||||||
|
int sa_schedpolicy;
|
||||||
|
sigset_t sa_sigdefault;
|
||||||
|
sigset_t sa_sigmask;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct __posix_spawn_file_actions {
|
||||||
|
STAILQ_HEAD(, __posix_spawn_file_actions_entry) fa_list;
|
||||||
|
};
|
||||||
|
|
||||||
|
typedef struct __posix_spawn_file_actions_entry {
|
||||||
|
STAILQ_ENTRY(__posix_spawn_file_actions_entry) fae_list;
|
||||||
|
enum { FAE_OPEN, FAE_DUP2, FAE_CLOSE } fae_action;
|
||||||
|
|
||||||
|
int fae_fildes;
|
||||||
|
union {
|
||||||
|
struct {
|
||||||
|
char *path;
|
||||||
|
#define fae_path fae_data.open.path
|
||||||
|
int oflag;
|
||||||
|
#define fae_oflag fae_data.open.oflag
|
||||||
|
mode_t mode;
|
||||||
|
#define fae_mode fae_data.open.mode
|
||||||
|
} open;
|
||||||
|
struct {
|
||||||
|
int newfildes;
|
||||||
|
#define fae_newfildes fae_data.dup2.newfildes
|
||||||
|
} dup2;
|
||||||
|
} fae_data;
|
||||||
|
} posix_spawn_file_actions_entry_t;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Spawn routines
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
process_spawnattr(const posix_spawnattr_t sa)
|
||||||
|
{
|
||||||
|
struct sigaction sigact = { .sa_flags = 0, .sa_handler = SIG_DFL };
|
||||||
|
int i;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* POSIX doesn't really describe in which order everything
|
||||||
|
* should be set. We'll just set them in the order in which they
|
||||||
|
* are mentioned.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Set signal masks/defaults */
|
||||||
|
if (sa->sa_flags & POSIX_SPAWN_SETSIGMASK) {
|
||||||
|
_sigprocmask(SIG_SETMASK, &sa->sa_sigmask, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (sa->sa_flags & POSIX_SPAWN_SETSIGDEF) {
|
||||||
|
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||||
|
if (sigismember(&sa->sa_sigdefault, i))
|
||||||
|
if (_sigaction(i, &sigact, NULL) != 0)
|
||||||
|
return (errno);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Reset user ID's */
|
||||||
|
if (sa->sa_flags & POSIX_SPAWN_RESETIDS) {
|
||||||
|
if (setegid(getgid()) != 0)
|
||||||
|
return (errno);
|
||||||
|
if (seteuid(getuid()) != 0)
|
||||||
|
return (errno);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Set process group */
|
||||||
|
if (sa->sa_flags & POSIX_SPAWN_SETPGROUP) {
|
||||||
|
if (setpgid(0, sa->sa_pgroup) != 0)
|
||||||
|
return (errno);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Set scheduler policy */
|
||||||
|
if (sa->sa_flags & POSIX_SPAWN_SETSCHEDULER) {
|
||||||
|
if (sched_setscheduler(0, sa->sa_schedpolicy,
|
||||||
|
&sa->sa_schedparam) != 0)
|
||||||
|
return (errno);
|
||||||
|
} else if (sa->sa_flags & POSIX_SPAWN_SETSCHEDPARAM) {
|
||||||
|
if (sched_setparam(0, &sa->sa_schedparam) != 0)
|
||||||
|
return (errno);
|
||||||
|
}
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
process_file_actions_entry(posix_spawn_file_actions_entry_t *fae)
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
|
||||||
|
switch (fae->fae_action) {
|
||||||
|
case FAE_OPEN:
|
||||||
|
/* Perform an open(), make it use the right fd */
|
||||||
|
fd = _open(fae->fae_path, fae->fae_oflag, fae->fae_mode);
|
||||||
|
if (fd < 0)
|
||||||
|
return (errno);
|
||||||
|
if (fd != fae->fae_fildes) {
|
||||||
|
if (_dup2(fd, fae->fae_fildes) == -1)
|
||||||
|
return (errno);
|
||||||
|
if (_close(fd) != 0) {
|
||||||
|
if (errno == EBADF)
|
||||||
|
return (EBADF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (_fcntl(fae->fae_fildes, F_SETFD, 0) == -1)
|
||||||
|
return (errno);
|
||||||
|
break;
|
||||||
|
case FAE_DUP2:
|
||||||
|
/* Perform a dup2() */
|
||||||
|
if (_dup2(fae->fae_fildes, fae->fae_newfildes) == -1)
|
||||||
|
return (errno);
|
||||||
|
if (_fcntl(fae->fae_newfildes, F_SETFD, 0) == -1)
|
||||||
|
return (errno);
|
||||||
|
break;
|
||||||
|
case FAE_CLOSE:
|
||||||
|
/* Perform a close() */
|
||||||
|
if (_close(fae->fae_fildes) != 0) {
|
||||||
|
if (errno == EBADF)
|
||||||
|
return (EBADF);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
process_file_actions(const posix_spawn_file_actions_t fa)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_entry_t *fae;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
/* Replay all file descriptor modifications */
|
||||||
|
STAILQ_FOREACH(fae, &fa->fa_list, fae_list) {
|
||||||
|
error = process_file_actions_entry(fae);
|
||||||
|
if (error)
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
do_posix_spawn(pid_t *pid, const char *path,
|
||||||
|
const posix_spawn_file_actions_t *fa,
|
||||||
|
const posix_spawnattr_t *sa,
|
||||||
|
char * const argv[], char * const envp[], int use_env_path)
|
||||||
|
{
|
||||||
|
pid_t p;
|
||||||
|
volatile int error = 0;
|
||||||
|
|
||||||
|
p = vfork();
|
||||||
|
switch (p) {
|
||||||
|
case -1:
|
||||||
|
return (errno);
|
||||||
|
case 0:
|
||||||
|
if (sa != NULL) {
|
||||||
|
error = process_spawnattr(*sa);
|
||||||
|
if (error)
|
||||||
|
_exit(127);
|
||||||
|
}
|
||||||
|
if (fa != NULL) {
|
||||||
|
error = process_file_actions(*fa);
|
||||||
|
if (error)
|
||||||
|
_exit(127);
|
||||||
|
}
|
||||||
|
if (use_env_path)
|
||||||
|
execvpe(path, argv, envp != NULL ? envp : environ);
|
||||||
|
else
|
||||||
|
_execve(path, argv, envp != NULL ? envp : environ);
|
||||||
|
error = errno;
|
||||||
|
_exit(127);
|
||||||
|
default:
|
||||||
|
if (pid != NULL)
|
||||||
|
*pid = p;
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawn(pid_t *pid, const char *path,
|
||||||
|
const posix_spawn_file_actions_t *fa,
|
||||||
|
const posix_spawnattr_t *sa,
|
||||||
|
char * const argv[], char * const envp[])
|
||||||
|
{
|
||||||
|
return do_posix_spawn(pid, path, fa, sa, argv, envp, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnp(pid_t *pid, const char *path,
|
||||||
|
const posix_spawn_file_actions_t *fa,
|
||||||
|
const posix_spawnattr_t *sa,
|
||||||
|
char * const argv[], char * const envp[])
|
||||||
|
{
|
||||||
|
return do_posix_spawn(pid, path, fa, sa, argv, envp, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* File descriptor actions
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawn_file_actions_init(posix_spawn_file_actions_t *ret)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_t fa;
|
||||||
|
|
||||||
|
fa = malloc(sizeof(struct __posix_spawn_file_actions));
|
||||||
|
if (fa == NULL)
|
||||||
|
return (-1);
|
||||||
|
|
||||||
|
STAILQ_INIT(&fa->fa_list);
|
||||||
|
*ret = fa;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *fa)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_entry_t *fae;
|
||||||
|
|
||||||
|
while ((fae = STAILQ_FIRST(&(*fa)->fa_list)) != NULL) {
|
||||||
|
/* Remove file action entry from the queue */
|
||||||
|
STAILQ_REMOVE_HEAD(&(*fa)->fa_list, fae_list);
|
||||||
|
|
||||||
|
/* Deallocate file action entry */
|
||||||
|
if (fae->fae_action == FAE_OPEN)
|
||||||
|
free(fae->fae_path);
|
||||||
|
free(fae);
|
||||||
|
}
|
||||||
|
|
||||||
|
free(*fa);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict fa,
|
||||||
|
int fildes, const char * __restrict path, int oflag, mode_t mode)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_entry_t *fae;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
if (fildes < 0)
|
||||||
|
return (EBADF);
|
||||||
|
|
||||||
|
/* Allocate object */
|
||||||
|
fae = malloc(sizeof(posix_spawn_file_actions_entry_t));
|
||||||
|
if (fae == NULL)
|
||||||
|
return (errno);
|
||||||
|
|
||||||
|
/* Set values and store in queue */
|
||||||
|
fae->fae_action = FAE_OPEN;
|
||||||
|
fae->fae_path = strdup(path);
|
||||||
|
if (fae->fae_path == NULL) {
|
||||||
|
error = errno;
|
||||||
|
free(fae);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
fae->fae_fildes = fildes;
|
||||||
|
fae->fae_oflag = oflag;
|
||||||
|
fae->fae_mode = mode;
|
||||||
|
|
||||||
|
STAILQ_INSERT_TAIL(&(*fa)->fa_list, fae, fae_list);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa,
|
||||||
|
int fildes, int newfildes)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_entry_t *fae;
|
||||||
|
|
||||||
|
if (fildes < 0 || newfildes < 0)
|
||||||
|
return (EBADF);
|
||||||
|
|
||||||
|
/* Allocate object */
|
||||||
|
fae = malloc(sizeof(posix_spawn_file_actions_entry_t));
|
||||||
|
if (fae == NULL)
|
||||||
|
return (errno);
|
||||||
|
|
||||||
|
/* Set values and store in queue */
|
||||||
|
fae->fae_action = FAE_DUP2;
|
||||||
|
fae->fae_fildes = fildes;
|
||||||
|
fae->fae_newfildes = newfildes;
|
||||||
|
|
||||||
|
STAILQ_INSERT_TAIL(&(*fa)->fa_list, fae, fae_list);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa,
|
||||||
|
int fildes)
|
||||||
|
{
|
||||||
|
posix_spawn_file_actions_entry_t *fae;
|
||||||
|
|
||||||
|
if (fildes < 0)
|
||||||
|
return (EBADF);
|
||||||
|
|
||||||
|
/* Allocate object */
|
||||||
|
fae = malloc(sizeof(posix_spawn_file_actions_entry_t));
|
||||||
|
if (fae == NULL)
|
||||||
|
return (errno);
|
||||||
|
|
||||||
|
/* Set values and store in queue */
|
||||||
|
fae->fae_action = FAE_CLOSE;
|
||||||
|
fae->fae_fildes = fildes;
|
||||||
|
|
||||||
|
STAILQ_INSERT_TAIL(&(*fa)->fa_list, fae, fae_list);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Spawn attributes
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_init(posix_spawnattr_t *ret)
|
||||||
|
{
|
||||||
|
posix_spawnattr_t sa;
|
||||||
|
|
||||||
|
sa = calloc(1, sizeof(struct __posix_spawnattr));
|
||||||
|
if (sa == NULL)
|
||||||
|
return (errno);
|
||||||
|
|
||||||
|
/* Set defaults as specified by POSIX, cleared above */
|
||||||
|
*ret = sa;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_destroy(posix_spawnattr_t *sa)
|
||||||
|
{
|
||||||
|
free(*sa);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getflags(const posix_spawnattr_t * __restrict sa,
|
||||||
|
short * __restrict flags)
|
||||||
|
{
|
||||||
|
*flags = (*sa)->sa_flags;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getpgroup(const posix_spawnattr_t * __restrict sa,
|
||||||
|
pid_t * __restrict pgroup)
|
||||||
|
{
|
||||||
|
*pgroup = (*sa)->sa_pgroup;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getschedparam(const posix_spawnattr_t * __restrict sa,
|
||||||
|
struct sched_param * __restrict schedparam)
|
||||||
|
{
|
||||||
|
*schedparam = (*sa)->sa_schedparam;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getschedpolicy(const posix_spawnattr_t * __restrict sa,
|
||||||
|
int * __restrict schedpolicy)
|
||||||
|
{
|
||||||
|
*schedpolicy = (*sa)->sa_schedpolicy;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getsigdefault(const posix_spawnattr_t * __restrict sa,
|
||||||
|
sigset_t * __restrict sigdefault)
|
||||||
|
{
|
||||||
|
*sigdefault = (*sa)->sa_sigdefault;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_getsigmask(const posix_spawnattr_t * __restrict sa,
|
||||||
|
sigset_t * __restrict sigmask)
|
||||||
|
{
|
||||||
|
*sigmask = (*sa)->sa_sigmask;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setflags(posix_spawnattr_t *sa, short flags)
|
||||||
|
{
|
||||||
|
(*sa)->sa_flags = flags;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setpgroup(posix_spawnattr_t *sa, pid_t pgroup)
|
||||||
|
{
|
||||||
|
(*sa)->sa_pgroup = pgroup;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setschedparam(posix_spawnattr_t *sa __restrict,
|
||||||
|
const struct sched_param * __restrict schedparam)
|
||||||
|
{
|
||||||
|
(*sa)->sa_schedparam = *schedparam;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setschedpolicy(posix_spawnattr_t *sa, int schedpolicy)
|
||||||
|
{
|
||||||
|
(*sa)->sa_schedpolicy = schedpolicy;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setsigdefault(posix_spawnattr_t * __restrict sa,
|
||||||
|
const sigset_t * __restrict sigdefault)
|
||||||
|
{
|
||||||
|
(*sa)->sa_sigdefault = *sigdefault;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
posix_spawnattr_setsigmask(posix_spawnattr_t * __restrict sa,
|
||||||
|
const sigset_t * __restrict sigmask)
|
||||||
|
{
|
||||||
|
(*sa)->sa_sigmask = *sigmask;
|
||||||
|
return (0);
|
||||||
|
}
|
Loading…
Reference in New Issue
Block a user