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fe61a7aa53
previously, a common __posix_spawnx backend was used that accepted an additional argument for the execve variant to call in the child. this moderately bloated up the posix_spawn function, shuffling arguments between stack and/or registers to call a 7-argument function from a 6-argument one. instead, tuck the exec function pointer in an unused part of the (large) pthread_spawnattr_t structure, and have posix_spawnp duplicate the attributes and fill in a pointer to __execvpe. the net code size change is minimal, but the weight is shifted to the "heavier" function which already pulls in more dependencies. as a bonus, we get rid of an external symbol (__posix_spawnx) that had no really good place for a declaration because it shouldn't have existed to begin with.
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
#ifndef _SPAWN_H
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#define _SPAWN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#define __NEED_mode_t
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#define __NEED_pid_t
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#define __NEED_sigset_t
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#include <bits/alltypes.h>
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struct sched_param;
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#define POSIX_SPAWN_RESETIDS 1
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#define POSIX_SPAWN_SETPGROUP 2
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#define POSIX_SPAWN_SETSIGDEF 4
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#define POSIX_SPAWN_SETSIGMASK 8
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#define POSIX_SPAWN_SETSCHEDPARAM 16
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#define POSIX_SPAWN_SETSCHEDULER 32
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#define POSIX_SPAWN_USEVFORK 64
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#define POSIX_SPAWN_SETSID 128
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typedef struct {
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int __flags;
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pid_t __pgrp;
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sigset_t __def, __mask;
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int __prio, __pol;
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void *__fn;
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char __pad[64-sizeof(void *)];
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} posix_spawnattr_t;
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typedef struct {
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int __pad0[2];
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void *__actions;
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int __pad[16];
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} posix_spawn_file_actions_t;
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int posix_spawn(pid_t *__restrict, const char *__restrict, const posix_spawn_file_actions_t *,
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const posix_spawnattr_t *__restrict, char *const *__restrict, char *const *__restrict);
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int posix_spawnp(pid_t *__restrict, const char *__restrict, const posix_spawn_file_actions_t *,
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const posix_spawnattr_t *__restrict, char *const *__restrict, char *const *__restrict);
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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_setflags(posix_spawnattr_t *, short);
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int posix_spawnattr_getflags(const posix_spawnattr_t *__restrict, short *__restrict);
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int posix_spawnattr_setpgroup(posix_spawnattr_t *, pid_t);
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int posix_spawnattr_getpgroup(const posix_spawnattr_t *__restrict, pid_t *__restrict);
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int posix_spawnattr_setsigmask(posix_spawnattr_t *__restrict, const sigset_t *__restrict);
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int posix_spawnattr_getsigmask(const posix_spawnattr_t *__restrict, sigset_t *__restrict);
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int posix_spawnattr_setsigdefault(posix_spawnattr_t *__restrict, const sigset_t *__restrict);
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int posix_spawnattr_getsigdefault(const posix_spawnattr_t *__restrict, sigset_t *__restrict);
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int posix_spawnattr_setschedparam(posix_spawnattr_t *__restrict, const struct sched_param *__restrict);
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int posix_spawnattr_getschedparam(const posix_spawnattr_t *__restrict, struct sched_param *__restrict);
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int posix_spawnattr_setschedpolicy(posix_spawnattr_t *, int);
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int posix_spawnattr_getschedpolicy(const posix_spawnattr_t *__restrict, int *__restrict);
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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, int, const char *__restrict, int, mode_t);
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int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *, int);
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int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *, int, int);
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#ifdef __cplusplus
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}
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#endif
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#endif
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