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do not depend on flock

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rsc 2005-01-07 07:19:35 +00:00
parent 9e863cf561
commit c71af67adc
1 changed files with 6 additions and 1 deletions
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7
src/lib9/open.c
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@ -12,6 +12,7 @@ p9open(char *name, int mode)
{
int cexec, rclose;
int fd, umode, lock, rdwr;
struct flock fl;
rdwr = mode&3;
umode = rdwr;
@ -34,7 +35,11 @@ p9open(char *name, int mode)
fd = open(name, umode);
if(fd >= 0){
if(lock){
if(flock(fd, (rdwr==OREAD) ? LOCK_SH : LOCK_EX) < 0){
fl.l_type = (rdwr==OREAD) ? F_RDLCK : F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
if(fcntl(fd, F_SETLK, &fl) < 0){
close(fd);
return -1;
}