xrootd
XrdSysFD.hh
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1 #ifndef __XRDSYS_FD_H__
2 #define __XRDSYS_FD_H__
3 /******************************************************************************/
4 /* */
5 /* X r d S y s F D . h h */
6 /* */
7 /* (c) 2013 by the Board of Trustees of the Leland Stanford, Jr., University */
8 /* Produced by Andrew Hanushevsky for Stanford University under contract */
9 /* DE-AC02-76-SFO0515 with the Department of Energy */
10 /* */
11 /* This file is part of the XRootD software suite. */
12 /* */
13 /* XRootD is free software: you can redistribute it and/or modify it under */
14 /* the terms of the GNU Lesser General Public License as published by the */
15 /* Free Software Foundation, either version 3 of the License, or (at your */
16 /* option) any later version. */
17 /* */
18 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
19 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
20 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
21 /* License for more details. */
22 /* */
23 /* You should have received a copy of the GNU Lesser General Public License */
24 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
25 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
26 /* */
27 /* The copyright holder's institutional names and contributor's names may not */
28 /* be used to endorse or promote products derived from this software without */
29 /* specific prior written permission of the institution or contributor. */
30 /******************************************************************************/
31 
32 //-----------------------------------------------------------------------------
38 //-----------------------------------------------------------------------------
39 
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <unistd.h>
43 #include <sys/stat.h>
44 #include <fcntl.h>
45 
46 namespace
47 {
48 #if defined(__linux__) && defined(SOCK_CLOEXEC) && defined(O_CLOEXEC)
49 inline int XrdSysFD_Accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
50  {return accept4(sockfd, addr, addrlen, SOCK_CLOEXEC);}
51 
52 inline int XrdSysFD_Dup(int oldfd)
53  {return fcntl(oldfd, F_DUPFD_CLOEXEC, 0);}
54 
55 inline int XrdSysFD_Dup1(int oldfd, int minfd)
56  {return fcntl(oldfd, F_DUPFD_CLOEXEC, minfd);}
57 
58 inline int XrdSysFD_Dup2(int oldfd, int newfd)
59  {return dup3(oldfd, newfd, O_CLOEXEC);}
60 
61 inline int XrdSysFD_Open(const char *path, int flags)
62  {return open(path, flags|O_CLOEXEC);}
63 
64 inline int XrdSysFD_Open(const char *path, int flags, mode_t mode)
65  {return open(path, flags|O_CLOEXEC, mode);}
66 
67 inline int XrdSysFD_Pipe(int pipefd[2])
68  {return pipe2(pipefd, O_CLOEXEC);}
69 
70 inline int XrdSysFD_Socket(int domain, int type, int protocol)
71  {return socket(domain, type|SOCK_CLOEXEC, protocol);}
72 
73 inline int XrdSysFD_Socketpair(int domain, int type, int protocol, int sfd[2])
74  {return socketpair(domain, type|SOCK_CLOEXEC, protocol, sfd);}
75 #else
76 inline int XrdSysFD_Accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
77  {int newfd = accept(sockfd, addr, addrlen);
78  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
79  return newfd;
80  }
81 
82 inline int XrdSysFD_Dup(int oldfd)
83  {int newfd = dup(oldfd);
84  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
85  return newfd;
86  }
87 
88 inline int XrdSysFD_Dup1(int oldfd, int minfd)
89  {int newfd = fcntl(oldfd, F_DUPFD, minfd);
90  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
91  return newfd;
92  }
93 
94 inline int XrdSysFD_Dup2(int oldfd, int newfd)
95  {int rc = dup2(oldfd, newfd);
96  if (!rc) fcntl(newfd, F_SETFD, FD_CLOEXEC);
97  return rc;
98  }
99 
100 inline int XrdSysFD_Open(const char *path, int flags)
101  {int newfd = open(path, flags);
102  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
103  return newfd;
104  }
105 
106 inline int XrdSysFD_Open(const char *path, int flags, mode_t mode)
107  {int newfd = open(path, flags, mode);
108  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
109  return newfd;
110  }
111 
112 inline int XrdSysFD_Pipe(int pipefd[2])
113  {int rc = pipe(pipefd);
114  if (!rc) {fcntl(pipefd[0], F_SETFD, FD_CLOEXEC);
115  fcntl(pipefd[1], F_SETFD, FD_CLOEXEC);
116  }
117  return rc;
118  }
119 
120 inline int XrdSysFD_Socket(int domain, int type, int protocol)
121  {int newfd = socket(domain, type, protocol);
122  if (newfd >= 0) fcntl(newfd, F_SETFD, FD_CLOEXEC);
123  return newfd;
124  }
125 
126 inline int XrdSysFD_Socketpair(int domain, int type, int protocol, int sfd[2])
127  {int rc = socketpair(domain, type, protocol, sfd);
128  if (!rc) {fcntl(sfd[0], F_SETFD, FD_CLOEXEC);
129  fcntl(sfd[1], F_SETFD, FD_CLOEXEC);
130  }
131  return rc;
132  }
133 #endif
134 
135 inline bool XrdSysFD_Yield(int fd)
136  {int fdFlags = fcntl(fd, F_GETFD);
137  if (fdFlags < 0) return false;
138  return 0 == fcntl(fd, F_SETFD, fdFlags & ~FD_CLOEXEC);
139  }
140 }
141 #endif
open
#define open
Definition: XrdPosix.hh:71