diff options
| -rw-r--r-- | lib/ChangeLog | 8 | ||||
| -rw-r--r-- | lib/network.c | 14 | ||||
| -rw-r--r-- | lib/network.h | 7 |
3 files changed, 29 insertions, 0 deletions
diff --git a/lib/ChangeLog b/lib/ChangeLog index 2b29056f..ee024389 100644 --- a/lib/ChangeLog +++ b/lib/ChangeLog @@ -1,3 +1,11 @@ +2005-02-15 Andrew J. Schorr <ajschorr@alumni.princeton.edu> + + * network.h: Declare new function set_nonblocking. Indicate that + readn and writen are deprecated. + * network.c: (set_nonblocking) New function to make a file descriptor + non-blocking, since it seems silly to have fcntl calls sprinkled + throughout the code. + 2005-02-14 Paul Jakma <paul.jakma@sun.com> * stream.h: Unsigned long updated to size_t diff --git a/lib/network.c b/lib/network.c index e1f733cf..3b296720 100644 --- a/lib/network.c +++ b/lib/network.c @@ -21,6 +21,8 @@ */ #include <zebra.h> +#include "log.h" +#include "network.h" /* Read nbytes from fd and store into ptr. */ int @@ -69,3 +71,15 @@ writen(int fd, const u_char *ptr, int nbytes) } return nbytes - nleft; } + +int +set_nonblocking(int fd) +{ + if (fcntl(fd, F_SETFL, (fcntl(fd, F_GETFL) | O_NONBLOCK)) < 0) + { + zlog_warn("fcntl failed setting fd %d non-blocking: %s", + fd, safe_strerror(errno)); + return -1; + } + return 0; +} diff --git a/lib/network.h b/lib/network.h index f0a7d4df..589b80e9 100644 --- a/lib/network.h +++ b/lib/network.h @@ -23,7 +23,14 @@ #ifndef _ZEBRA_NETWORK_H #define _ZEBRA_NETWORK_H +/* Both readn and writen are deprecated and will be removed. They are not + suitable for use with non-blocking file descriptors. + */ int readn (int, u_char *, int); int writen (int, const u_char *, int); +/* Set the file descriptor to use non-blocking I/O. Returns 0 for success, + -1 on error. */ +extern int set_nonblocking(int fd); + #endif /* _ZEBRA_NETWORK_H */ |