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| author | John Kohl <jtkohl@mit.edu> | 1990-04-19 16:31:28 +0000 |
|---|---|---|
| committer | John Kohl <jtkohl@mit.edu> | 1990-04-19 16:31:28 +0000 |
| commit | d7410d356bbca0b26342e47f243e13e9a5fcff0f (patch) | |
| tree | f6d8fd667a01aaf93c4c9cd10e95af054d463a0d /src/lib/krb5/os/lock_file.c | |
| parent | 1511ef1e532ddc877561c90e2d63ad14fd519add (diff) | |
| download | krb5-d7410d356bbca0b26342e47f243e13e9a5fcff0f.tar.gz krb5-d7410d356bbca0b26342e47f243e13e9a5fcff0f.tar.xz krb5-d7410d356bbca0b26342e47f243e13e9a5fcff0f.zip | |
add POSIX version
git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@523 dc483132-0cff-0310-8789-dd5450dbe970
Diffstat (limited to 'src/lib/krb5/os/lock_file.c')
| -rw-r--r-- | src/lib/krb5/os/lock_file.c | 56 |
1 files changed, 48 insertions, 8 deletions
diff --git a/src/lib/krb5/os/lock_file.c b/src/lib/krb5/os/lock_file.c index d57652004a..e15e38fdd9 100644 --- a/src/lib/krb5/os/lock_file.c +++ b/src/lib/krb5/os/lock_file.c @@ -22,7 +22,18 @@ static char rcsid_lock_file_c [] = #include <krb5/libos.h> #include <stdio.h> +#ifdef POSIX +#include <errno.h> +#include <fcntl.h> +#define SHARED_LOCK F_RDLCK +#define EXCLUSIVE_LOCK F_WRLCK +#define UNLOCK_LOCK F_UNLCK +#else #include <sys/file.h> +#define SHARED_LOCK LOCK_SH +#define EXCLUSIVE_LOCK LOCK_EX +#define UNLOCK_LOCK LOCK_UN +#endif #include <sys/types.h> #include <krb5/ext-proto.h> @@ -36,22 +47,51 @@ FILE *filep; char *pathname; int mode; { - int flock_flag = -1; +#ifdef POSIX + int lock_cmd = F_SETLKW; + struct flock lock_arg; +#define lock_flag lock_arg.l_type + lock_flag = -1; +#else + int lock_flag = -1; +#endif switch (mode & ~KRB5_LOCKMODE_DONTBLOCK) { case KRB5_LOCKMODE_SHARED: - flock_flag = LOCK_SH; + lock_flag = SHARED_LOCK; + break; case KRB5_LOCKMODE_EXCLUSIVE: - flock_flag = LOCK_EX; + lock_flag = EXCLUSIVE_LOCK; + break; case KRB5_LOCKMODE_UNLOCK: - flock_flag = LOCK_UN; + lock_flag = UNLOCK_LOCK; + break; } - if (flock_flag == -1) + + if (lock_flag == -1) return(KRB5_LIBOS_BADLOCKFLAG); - if (mode & KRB5_LOCKMODE_DONTBLOCK) - flock_flag |= LOCK_NB; - if (flock(fileno(filep), flock_flag) == -1) + if (mode & KRB5_LOCKMODE_DONTBLOCK) { +#ifdef POSIX + lock_cmd = F_SETLK; +#else + lock_flag |= LOCK_NB; +#endif + } + +#ifdef POSIX + lock_arg.l_whence = 0; + lock_arg.l_start = 0; + lock_arg.l_len = 0; + if (fcntl(fileno(filep), lock_cmd, &lock_arg) == -1) { + if (errno == EACCES || errno == EAGAIN) /* see POSIX/IEEE 1003.1-1988, + 6.5.2.4 */ + return(EAGAIN); + return(errno); + } +#else + if (flock(fileno(filep), lock_flag) == -1) return(errno); +#endif return 0; } |