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report errno for fork failure

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svn: r15434
This commit is contained in:
Matthew Flatt 2009-07-12 02:11:32 +00:00
parent 57a046c5f8
commit 307e205d7a
1 changed files with 5 additions and 2 deletions
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7
src/mzscheme/src/port.c
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@ -7402,6 +7402,7 @@ static Scheme_Object *subprocess(int c, Scheme_Object *args[])
Scheme_Object *in, *out, *err;
#if defined(UNIX_PROCESSES)
System_Child *sc;
int fork_errno = 0;
#else
void *sc = 0;
#endif
@ -7639,7 +7640,7 @@ static Scheme_Object *subprocess(int c, Scheme_Object *args[])
sc->next = scheme_system_children;
scheme_system_children = sc;
sc->id = pid;
} else {
} else if (!pid) {
#ifdef USE_ITIMER
/* Turn off the timer. */
/* SIGPROF is masked at this point due to
@ -7668,6 +7669,8 @@ static Scheme_Object *subprocess(int c, Scheme_Object *args[])
}
END_XFORM_SKIP;
#endif
} else {
fork_errno = errno;
}
scheme_block_child_signals(0);
@ -7689,7 +7692,7 @@ static Scheme_Object *subprocess(int c, Scheme_Object *args[])
MSC_IZE(close)(err_subprocess[0]);
MSC_IZE(close)(err_subprocess[1]);
}
scheme_raise_exn(MZEXN_FAIL, "%s: fork failed", name);
scheme_raise_exn(MZEXN_FAIL, "%s: fork failed (%e)", name, fork_errno);
return scheme_false;
case 0: /* child */