[Bug 1373726] [NEW] Config file buffer limit

[Zach Riggle]

Public bug reported:

The routine read_config_file is still using a statically sized buffer.
Almost two years ago this was fixed in upstream.

This breaks when using very long config file lines.  For example, trying
to set an enum for all enumerated error numbers in errno (see below).

daefa4a - Use getline instead of static buffer in read_config_file (1
year, 7 months ago) - Petr Machata

To reproduce, create a file named ~/.ltrace.conf with the following
line:

typedef errno=enum ( EPERM=1, ENOENT=2, ESRCH=3, EINTR=4, EIO=5,
ENXIO=6, E2BIG=7, ENOEXEC=8, EBADF=9, ECHILD=10, EAGAIN=11, ENOMEM=12,
EACCES=13, EFAULT=14, ENOTBLK=15, EBUSY=16, EEXIST=17, EXDEV=18,
ENODEV=19, ENOTDIR=20, EISDIR=21, EINVAL=22, ENFILE=23, EMFILE=24,
ENOTTY=25, ETXTBSY=26, EFBIG=27, ENOSPC=28, ESPIPE=29, EROFS=30,
EMLINK=31, EPIPE=32, EDOM=33, ERANGE=34, EDEADLK=35, ENAMETOOLONG=36,
ENOLCK=37, ENOSYS=38, ENOTEMPTY=39, ELOOP=40, EWOULDBLOCK=11, ENOMSG=42,
EIDRM=43, ECHRNG=44, EL2NSYNC=45, EL3HLT=46, EL3RST=47, ELNRNG=48,
EUNATCH=49, ENOCSI=50, EL2HLT=51, EBADE=52, EBADR=53, EXFULL=54,
ENOANO=55, EBADRQC=56, EBADSLT=57, EDEADLOCK=35, EBFONT=59, ENOSTR=60,
ENODATA=61, ETIME=62, ENOSR=63, ENONET=64, ENOPKG=65, EREMOTE=66,
ENOLINK=67, EADV=68, ESRMNT=69, ECOMM=70, EPROTO=71, EMULTIHOP=72,
EDOTDOT=73, EBADMSG=74, EOVERFLOW=75, ENOTUNIQ=76, EBADFD=77,
EREMCHG=78, ELIBACC=79, ELIBBAD=80, ELIBSCN=81, ELIBMAX=82, ELIBEXEC=83,
EILSEQ=84, ERESTART=85, ESTRPIPE=86, EUSERS=87, ENOTSOCK=88,
EDESTADDRREQ=89, EMSGSIZE=90, EPROTOTYPE=91, ENOPROTOOPT=92,
EPROTONOSUPPORT=93, ESOCKTNOSUPPORT=94, EOPNOTSUPP=95, EPFNOSUPPORT=96,
EAFNOSUPPORT=97, EADDRINUSE=98, EADDRNOTAVAIL=99, ENETDOWN=100,
ENETUNREACH=101, ENETRESET=102, ECONNABORTED=103, ECONNRESET=104,
ENOBUFS=105, EISCONN=106, ENOTCONN=107, ESHUTDOWN=108, ETOOMANYREFS=109,
ETIMEDOUT=110, ECONNREFUSED=111, EHOSTDOWN=112, EHOSTUNREACH=113,
EALREADY=114, EINPROGRESS=115, ESTALE=116, EUCLEAN=117, ENOTNAM=118,
ENAVAIL=119, EISNAM=120, EREMOTEIO=121, EDQUOT=122, ENOMEDIUM=123,
EMEDIUMTYPE=124, ECANCELED=125, ENOKEY=126, EKEYEXPIRED=127,
EKEYREVOKED=128, EKEYREJECTED=129);

** Affects: ltrace (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1373726

Title:
  Config file buffer limit

Status in “ltrace” package in Ubuntu:
  New

Bug description:
  The routine read_config_file is still using a statically sized buffer.
  Almost two years ago this was fixed in upstream.

  This breaks when using very long config file lines.  For example,
  trying to set an enum for all enumerated error numbers in errno (see
  below).

  daefa4a - Use getline instead of static buffer in read_config_file (1
  year, 7 months ago) - Petr Machata

  To reproduce, create a file named ~/.ltrace.conf with the following
  line:

  typedef errno=enum ( EPERM=1, ENOENT=2, ESRCH=3, EINTR=4, EIO=5,
  ENXIO=6, E2BIG=7, ENOEXEC=8, EBADF=9, ECHILD=10, EAGAIN=11, ENOMEM=12,
  EACCES=13, EFAULT=14, ENOTBLK=15, EBUSY=16, EEXIST=17, EXDEV=18,
  ENODEV=19, ENOTDIR=20, EISDIR=21, EINVAL=22, ENFILE=23, EMFILE=24,
  ENOTTY=25, ETXTBSY=26, EFBIG=27, ENOSPC=28, ESPIPE=29, EROFS=30,
  EMLINK=31, EPIPE=32, EDOM=33, ERANGE=34, EDEADLK=35, ENAMETOOLONG=36,
  ENOLCK=37, ENOSYS=38, ENOTEMPTY=39, ELOOP=40, EWOULDBLOCK=11,
  ENOMSG=42, EIDRM=43, ECHRNG=44, EL2NSYNC=45, EL3HLT=46, EL3RST=47,
  ELNRNG=48, EUNATCH=49, ENOCSI=50, EL2HLT=51, EBADE=52, EBADR=53,
  EXFULL=54, ENOANO=55, EBADRQC=56, EBADSLT=57, EDEADLOCK=35, EBFONT=59,
  ENOSTR=60, ENODATA=61, ETIME=62, ENOSR=63, ENONET=64, ENOPKG=65,
  EREMOTE=66, ENOLINK=67, EADV=68, ESRMNT=69, ECOMM=70, EPROTO=71,
  EMULTIHOP=72, EDOTDOT=73, EBADMSG=74, EOVERFLOW=75, ENOTUNIQ=76,
  EBADFD=77, EREMCHG=78, ELIBACC=79, ELIBBAD=80, ELIBSCN=81, ELIBMAX=82,
  ELIBEXEC=83, EILSEQ=84, ERESTART=85, ESTRPIPE=86, EUSERS=87,
  ENOTSOCK=88, EDESTADDRREQ=89, EMSGSIZE=90, EPROTOTYPE=91,
  ENOPROTOOPT=92, EPROTONOSUPPORT=93, ESOCKTNOSUPPORT=94, EOPNOTSUPP=95,
  EPFNOSUPPORT=96, EAFNOSUPPORT=97, EADDRINUSE=98, EADDRNOTAVAIL=99,
  ENETDOWN=100, ENETUNREACH=101, ENETRESET=102, ECONNABORTED=103,
  ECONNRESET=104, ENOBUFS=105, EISCONN=106, ENOTCONN=107, ESHUTDOWN=108,
  ETOOMANYREFS=109, ETIMEDOUT=110, ECONNREFUSED=111, EHOSTDOWN=112,
  EHOSTUNREACH=113, EALREADY=114, EINPROGRESS=115, ESTALE=116,
  EUCLEAN=117, ENOTNAM=118, ENAVAIL=119, EISNAM=120, EREMOTEIO=121,
  EDQUOT=122, ENOMEDIUM=123, EMEDIUMTYPE=124, ECANCELED=125, ENOKEY=126,
  EKEYEXPIRED=127, EKEYREVOKED=128, EKEYREJECTED=129);

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