90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
/*
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* Copyright (c) 2015-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/wait.h>
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static inline int
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logit_(const char *const str)
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{
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return !chdir(str);
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}
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#define prefix "vfork-f."
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#define logit(arg) logit_(prefix arg)
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int main(int ac, char **av)
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{
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if (ac < 1)
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return 1;
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if (ac > 1) {
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if (read(0, &ac, sizeof(int)))
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return 2;
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return logit("exec");
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}
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logit("start");
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int child_wait_fds[2];
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(void) close(0);
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if (pipe(child_wait_fds))
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perror_msg_and_fail("pipe");
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if (fcntl(child_wait_fds[1], F_SETFD, FD_CLOEXEC))
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perror_msg_and_fail("fcntl");
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int parent_wait_fds[2];
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if (pipe(parent_wait_fds))
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perror_msg_and_fail("pipe");
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if (fcntl(parent_wait_fds[0], F_SETFD, FD_CLOEXEC))
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perror_msg_and_fail("fcntl");
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if (fcntl(parent_wait_fds[1], F_SETFD, FD_CLOEXEC))
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perror_msg_and_fail("fcntl");
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char *const args[] = { av[0], (char *) "", NULL };
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pid_t pid = vfork();
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if (pid < 0)
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perror_msg_and_fail("vfork");
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if (!pid) {
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if (logit("child") || execve(args[0], args, args + 1))
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_exit(2);
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}
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close(0);
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close(parent_wait_fds[1]);
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if (read(parent_wait_fds[0], &parent_wait_fds[1], sizeof(int)))
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perror_msg_and_fail("read");
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logit("parent");
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close(child_wait_fds[1]);
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int status;
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assert(wait(&status) == pid);
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assert(status == 0);
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pid_t ppid = getpid();
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logit("finish");
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printf("%-5d chdir(\"%sstart\") = -1 ENOENT (%m)\n"
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"%-5d chdir(\"%schild\") = -1 ENOENT (%m)\n"
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"%-5d chdir(\"%sparent\") = -1 ENOENT (%m)\n"
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"%-5d chdir(\"%sexec\") = -1 ENOENT (%m)\n"
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"%-5d chdir(\"%sfinish\") = -1 ENOENT (%m)\n",
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ppid, prefix,
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pid, prefix,
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ppid, prefix,
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pid, prefix,
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ppid, prefix);
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return 0;
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}
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