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c7bd453e68
Leave common utility functions in c_src/sys/alcove_fork.(c|h). Maybe these files should be renamed "fork_common.c" or "alcove_fork_common.c". Move alcove_setfd() to alcove.c since the pid_foreach() is also there. These common functions should also eventually be moved out to another file.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* Copyright (c) 2014, Michael Santos <michael.santos@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "alcove.h"
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#include "alcove_call.h"
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#include "alcove_fork.h"
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/*
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* fork(2)
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*
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*/
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ssize_t
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alcove_sys_fork(alcove_state_t *ap, const char *arg, size_t len,
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char *reply, size_t rlen)
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{
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int rindex = 0;
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alcove_arg_t child_arg = {0};
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alcove_stdio_t fd = {{0}};
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pid_t pid = 0;
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sigset_t oldset;
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sigset_t set;
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int errnum = 0;
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if (ap->depth >= ap->maxforkdepth)
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return alcove_mk_errno(reply, rlen, EAGAIN);
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if (pid_foreach(ap, 0, NULL, NULL, pid_equal, avail_pid) != 0)
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return alcove_mk_errno(reply, rlen, EAGAIN);
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if (alcove_stdio(&fd) < 0)
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return alcove_mk_errno(reply, rlen, errno);
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(void)sigfillset(&set);
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(void)sigemptyset(&oldset);
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if (sigprocmask(SIG_BLOCK, &set, &oldset) < 0)
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return alcove_mk_errno(reply, rlen, errno);
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child_arg.ap = ap;
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child_arg.fd = &fd;
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child_arg.sigset = &oldset;
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pid = fork();
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switch (pid) {
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case -1:
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errnum = errno;
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if (sigprocmask(SIG_SETMASK, &oldset, NULL) < 0)
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exit(errno);
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return alcove_mk_errno(reply, rlen, errnum);
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case 0:
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if (alcove_child_fun(&child_arg) < 0)
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exit(errno);
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exit(0);
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default:
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if (sigprocmask(SIG_SETMASK, &oldset, NULL) < 0)
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return alcove_mk_errno(reply, rlen, errno);
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if (alcove_parent_fd(ap, &fd, pid) < 0)
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return alcove_mk_errno(reply, rlen, errno);
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ALCOVE_OK(reply, &rindex,
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alcove_encode_long(reply, rlen, &rindex, pid));
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return rindex;
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}
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}
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