2012/4/9 Robert Haas <robertmh...@gmail.com> > On Mon, Apr 9, 2012 at 7:38 AM, Clover White <mywhiteclo...@gmail.com> > wrote: > > Hi, > > I'm debugging initdb using gdb. > > I found that I could not step in the function getopt_long in line 2572 > in > > initdb.c. > > I also found that the value of VAR optind never be changed. VAR optind > is > > always equal to 1 but how could optind be larger than the value of > argc(the > > value of argc is 6) in line 2648 and 2654. > > Read the man page for getopt_long. It changes the global variable optind. > > It's a silly interface, but also a long and hallowed UNIX tradition, > so we're stuck with it. > > -- > Robert Haas > EnterpriseDB: http://www.enterprisedb.com > The Enterprise PostgreSQL Company >
Thanks Robert. I have read the man page for getopt_long and optind. they are in the same man page. but i still could not understand why optind always equal to 1 when I gdb initdb and print optind? Was optind supported to increased after getopt_long pasered every parameter? -- Clover White
