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Set socket creation permission in a portable way 

fchmod(2) on a socket file descriptor is unspecified behaviour
which happens to work on Linux. Use umask(2) instead which should
affect the permissions used by bind(2).
This commit is contained in:
Marc André Tanner 2015-02-21 18:03:56 +01:00
parent af531f98ae
commit 91b7338f9d
1 changed files with 2 additions and 5 deletions
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7
server.c
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@ -38,13 +38,10 @@ static int server_create_socket(const char *name) {
if (fd == -1)
return -1;
socklen_t socklen = offsetof(struct sockaddr_un, sun_path) + strlen(sockaddr.sun_path) + 1;
mode_t mode = S_IRUSR|S_IWUSR;
if (fchmod(fd, mode) == -1)
goto error1;
mode_t mode = umask(S_IXUSR|S_IXGRP|S_IRWXO);
if (bind(fd, (struct sockaddr*)&sockaddr, socklen) == -1)
goto error1;
if (fchmod(fd, mode) == -1 || chmod(sockaddr.sun_path, mode) == -1)
goto error2;
umask(mode);
if (listen(fd, 5) == -1)
goto error2;
return fd;