diff options
| author | rsc <devnull@localhost> | 2004-06-11 14:38:56 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2004-06-11 14:38:56 +0000 |
| commit | e750400529eb4e655e206cbfba42b156a03c29c3 (patch) | |
| tree | e3b925bbaa38adec1d915d29b01d4f672c337c65 /src/lib9/create.c | |
| parent | d2ffec702ecc02ddb00700b713865a7868d9805b (diff) | |
| download | plan9port-e750400529eb4e655e206cbfba42b156a03c29c3.tar.gz plan9port-e750400529eb4e655e206cbfba42b156a03c29c3.tar.bz2 plan9port-e750400529eb4e655e206cbfba42b156a03c29c3.zip | |
add OLOCK
Diffstat (limited to 'src/lib9/create.c')
| -rw-r--r-- | src/lib9/create.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/lib9/create.c b/src/lib9/create.c index 6bfb0c1b..a9e796ad 100644 --- a/src/lib9/create.c +++ b/src/lib9/create.c @@ -1,6 +1,7 @@ #define _GNU_SOURCE /* for Linux O_DIRECT */ #include <u.h> #define NOPLAN9DEFINES +#include <sys/file.h> #include <libc.h> #include <sys/stat.h> #ifndef O_DIRECT @@ -10,11 +11,12 @@ int p9create(char *path, int mode, ulong perm) { - int fd, cexec, umode, rclose; + int fd, cexec, umode, rclose, lock; + lock = mode&OLOCK; cexec = mode&OCEXEC; rclose = mode&ORCLOSE; - mode &= ~(ORCLOSE|OCEXEC); + mode &= ~(ORCLOSE|OCEXEC|OLOCK); /* XXX should get mode mask right? */ fd = -1; @@ -45,6 +47,12 @@ p9create(char *path, int mode, ulong perm) } out: if(fd >= 0){ + if(lock){ + if(flock(fd, (mode==OREAD) ? LOCK_SH : LOCK_EX) < 0){ + close(fd); + return -1; + } + } if(cexec) fcntl(fd, F_SETFL, FD_CLOEXEC); if(rclose) |