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Explore comfort level with posix_spawn

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Justine says nay for the time being. Only XNU implements this. It's not
clear what ABI XNU is using but it's obviously not the one in the POSIX
documentation link below. Since all platforms implement vfork, it might
be better to empirically gauge the intersection of consensus which will
have better performance than this interface.

https://pubs.opengroup.org/onlinepubs/009696699/xrat/xsh_chap03.html
This commit is contained in:
Justine Tunney 2021-01-29 00:10:06 -08:00
parent b2260c2278
commit f7c7b949fd
13 changed files with 30 additions and 56 deletions
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40
libc/sysv/consts/posix.h
View file

@ -1,26 +1,6 @@
#ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_POSIX_H_
#define COSMOPOLITAN_LIBC_SYSV_CONSTS_POSIX_H_
#include "libc/runtime/symbolic.h"
#define POSIX_FADV_DONTNEED SYMBOLIC(POSIX_FADV_DONTNEED)
#define POSIX_FADV_NOREUSE SYMBOLIC(POSIX_FADV_NOREUSE)
#define POSIX_FADV_NORMAL SYMBOLIC(POSIX_FADV_NORMAL)
#define POSIX_FADV_RANDOM SYMBOLIC(POSIX_FADV_RANDOM)
#define POSIX_FADV_SEQUENTIAL SYMBOLIC(POSIX_FADV_SEQUENTIAL)
#define POSIX_FADV_WILLNEED SYMBOLIC(POSIX_FADV_WILLNEED)
#define POSIX_MADV_DONTNEED SYMBOLIC(POSIX_MADV_DONTNEED)
#define POSIX_MADV_NORMAL SYMBOLIC(POSIX_MADV_NORMAL)
#define POSIX_MADV_RANDOM SYMBOLIC(POSIX_MADV_RANDOM)
#define POSIX_MADV_SEQUENTIAL SYMBOLIC(POSIX_MADV_SEQUENTIAL)
#define POSIX_MADV_WILLNEED SYMBOLIC(POSIX_MADV_WILLNEED)
#define POSIX_SPAWN_RESETIDS SYMBOLIC(POSIX_SPAWN_RESETIDS)
#define POSIX_SPAWN_SETPGROUP SYMBOLIC(POSIX_SPAWN_SETPGROUP)
#define POSIX_SPAWN_SETSCHEDPARAM SYMBOLIC(POSIX_SPAWN_SETSCHEDPARAM)
#define POSIX_SPAWN_SETSCHEDULER SYMBOLIC(POSIX_SPAWN_SETSCHEDULER)
#define POSIX_SPAWN_SETSIGDEF SYMBOLIC(POSIX_SPAWN_SETSIGDEF)
#define POSIX_SPAWN_SETSIGMASK SYMBOLIC(POSIX_SPAWN_SETSIGMASK)
#define POSIX_SPAWN_USEVFORK SYMBOLIC(POSIX_SPAWN_USEVFORK)
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
@ -35,14 +15,20 @@ hidden extern const long POSIX_MADV_NORMAL;
hidden extern const long POSIX_MADV_RANDOM;
hidden extern const long POSIX_MADV_SEQUENTIAL;
hidden extern const long POSIX_MADV_WILLNEED;
hidden extern const long POSIX_SPAWN_RESETIDS;
hidden extern const long POSIX_SPAWN_SETPGROUP;
hidden extern const long POSIX_SPAWN_SETSCHEDPARAM;
hidden extern const long POSIX_SPAWN_SETSCHEDULER;
hidden extern const long POSIX_SPAWN_SETSIGDEF;
hidden extern const long POSIX_SPAWN_SETSIGMASK;
hidden extern const long POSIX_SPAWN_USEVFORK;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#define POSIX_FADV_DONTNEED SYMBOLIC(POSIX_FADV_DONTNEED)
#define POSIX_FADV_NOREUSE SYMBOLIC(POSIX_FADV_NOREUSE)
#define POSIX_FADV_NORMAL SYMBOLIC(POSIX_FADV_NORMAL)
#define POSIX_FADV_RANDOM SYMBOLIC(POSIX_FADV_RANDOM)
#define POSIX_FADV_SEQUENTIAL SYMBOLIC(POSIX_FADV_SEQUENTIAL)
#define POSIX_FADV_WILLNEED SYMBOLIC(POSIX_FADV_WILLNEED)
#define POSIX_MADV_DONTNEED SYMBOLIC(POSIX_MADV_DONTNEED)
#define POSIX_MADV_NORMAL SYMBOLIC(POSIX_MADV_NORMAL)
#define POSIX_MADV_RANDOM SYMBOLIC(POSIX_MADV_RANDOM)
#define POSIX_MADV_SEQUENTIAL SYMBOLIC(POSIX_MADV_SEQUENTIAL)
#define POSIX_MADV_WILLNEED SYMBOLIC(POSIX_MADV_WILLNEED)
#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_POSIX_H_ */