Hi Marcus, this is the function code ************************** function code ********************* int file_exists(const char *fname) { struct stat attribut; if( (stat(fname, &attribut)) == -1) { if(errno == ENOENT) return false; else printf("stat() Fehler: %d\n", errno); } else if( S_ISREG(attribut.st_mode)) return true; return false; } *********************************************************** As I could find out so far, it's likely that this is problem of gdb. strace states that stat gets the correct argument. Regards, Oliver Am Montag, 27. November 2006 16:08 schrieben Sie:
On Mon, Nov 27, 2006 at 03:57:43PM +0100, Oliver Block wrote:
Hello,
I was facing a problem with a functio I wrote, checking if a file exists withing the fs. When I was debuggin that , I set 2 breakpoints, the first to the function file_exists and the second to the function call of file_exists inside the program. I got the following output
**************************** gdb ************************************ Breakpoint 2, main (argc=1, argv=0xbffff1c4) at ddnscli.c:712 712 if(file_exists(lockfile)) (gdb) s
Breakpoint 1, file_exists (fname=0xbffff110 "disabled") at ddnscli.c:689 689 if( (rval = stat( fname, &attribut)) == -1) (gdb) s __stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51 51 stat.c: Datei oder Verzeichnis nicht gefunden. in stat.c (gdb) bt full #0 __stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51 No locals. #1 0x0804a56b in file_exists (fname=0xbffff110 "disabled") at ddnscli.c:689 attribut = {st_dev = 128, __pad1 = 34760, st_ino = 7, st_mode = 53, st_nlink = 1075277812, st_uid = 1075283840, st_gid = 134522768, st_rdev = 4615200421588234412, __pad2 = 34688, st_size = 40, st_blksize = 1075277812, st_blocks = 1073835200, st_atime = 134522768, st_atimensec = 3221221564, st_mtime = 1074560382, st_mtimensec = 40, st_ctime = 1075277812, st_ctimensec = 3221221592, __unused4 = 1074559989, __unused5 = 40} rval = 1075277812 ************************************************************************* ************
__stat (file=0xbffff070 "\200", buf=0xbffff070) at stat.c:51
both arguments of stat hold the same address. file should be AFAIK fname=0xbffff110.
I isolated the function to a test_program and it works fine there.
Any ideas?
Showing us the actual source of the function would perhaps help.
Ciao, Marcus
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