sudo strace -p 18750 -f -e trace=execve

strace: Process 18750 attached
strace: Process 19055 attached
[pid 19055] execve("/usr/lib/cups/daemon/cups-exec", ["/usr/lib/cups/daemon/cups-exec", "-g", "7", "-n", "0", "-u", "7", "none", "/usr/lib/cups/filter/pdftopdf", "Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"..., "/var/spool/cups/d00011-001"], 0x7ffda71513b0 /* 31 vars */) = 0
[pid 19055] execve("/usr/lib/cups/filter/pdftopdf", ["Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"..., "/var/spool/cups/d00011-001"], 0x7ffdb5e449b0 /* 31 vars */) = 0
strace: Process 19056 attached
[pid 19056] execve("/usr/lib/cups/daemon/cups-exec", ["/usr/lib/cups/daemon/cups-exec", "-g", "7", "-n", "0", "-u", "7", "none", "/usr/lib/cups/filter/pdftops", "Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7ffda71513b0 /* 31 vars */) = 0
[pid 19056] execve("/usr/lib/cups/filter/pdftops", ["Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7ffcd9ecb7b8 /* 31 vars */) = 0
strace: Process 19057 attached
[pid 19057] execve("/usr/lib/cups/daemon/cups-exec", ["/usr/lib/cups/daemon/cups-exec", "-g", "7", "-n", "0", "-u", "7", "none", "/usr/lib/cups/filter/pstoufr2cpc"..., "Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7ffda71513b0 /* 31 vars */) = 0
strace: Process 19058 attached
[pid 19057] execve("/usr/lib/cups/filter/pstoufr2cpca", ["Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7fff61d7d078 /* 31 vars */) = 0
[pid 19058] execve("/usr/lib/cups/daemon/cups-exec", ["/usr/lib/cups/daemon/cups-exec", "-g", "7", "-n", "0", "-u", "0", "none", "/usr/lib/cups/backend/lpd", "lpd://10.0.3.1", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7ffda71513b0 /* 31 vars */) = 0
[pid 19058] execve("/usr/lib/cups/backend/lpd", ["lpd://10.0.3.1", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCollate number-"...], 0x7ffd499cb388 /* 31 vars */) = 0
[pid 19055] +++ exited with 0 +++
[pid 18750] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19055, si_uid=7, si_status=0, si_utime=1, si_stime=0} ---
strace: Process 19059 attached
strace: Process 19060 attached
[pid 19060] execve("/usr/lib/cups/filter/pstops", ["Canon-iR1020-1024-1025-UFRII-LT", "11", "tim", "Untitled Document 1", "1", "InputSlot=Auto noCNTonerSaving M"...], 0x7ffca7065510 /* 30 vars */ <unfinished ...>
[pid 19059] execve("/usr/lib/cups/filter/gs", ["gs", "-q", "-dNOPAUSE", "-dBATCH", "-dSAFER", "-dNOMEDIAATTRS", "-sDEVICE=ps2write", "-dShowAcroForm", "-sOUTPUTFILE=%stdout", "-dLanguageLevel=3", "-r600", "-dCompressFonts=false", "-dNoT3CCITT", "-dNOINTERPOLATE", "-c", "save pop", "-f", "/tmp/04a705a73bdd7"], 0x7ffca7065510 /* 30 vars */) = -1 ENOENT (No such file or directory)
[pid 19059] execve("/usr/bin/gs", ["gs", "-q", "-dNOPAUSE", "-dBATCH", "-dSAFER", "-dNOMEDIAATTRS", "-sDEVICE=ps2write", "-dShowAcroForm", "-sOUTPUTFILE=%stdout", "-dLanguageLevel=3", "-r600", "-dCompressFonts=false", "-dNoT3CCITT", "-dNOINTERPOLATE", "-c", "save pop", "-f", "/tmp/04a705a73bdd7"], 0x7ffca7065510 /* 30 vars */) = 0
[pid 19060] <... execve resumed> )      = 0
[pid 19060] +++ exited with 0 +++
[pid 19056] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19060, si_uid=7, si_status=0, si_utime=1, si_stime=0} ---
[pid 19059] +++ exited with 0 +++
[pid 19056] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19059, si_uid=7, si_status=0, si_utime=9, si_stime=2} ---
[pid 19056] +++ exited with 0 +++
[pid 18750] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19056, si_uid=7, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 19061 attached
[pid 19061] execve("/usr/bin/gs", ["/usr/bin/gs", "-r600", "-dDEVICEWIDTH=5100", "-dDEVICEHEIGHT=6600", "-sDEVICE=opvp", "-sDriver=libcanonc3pl.so", "-sModel=iR1020/1024/1025", "-sJobInfo=ps:CNOEFLibName=ufr2fi"..., "-q", "-dBATCH", "-dSAFER", "-dQUIET", "-dNOPAUSE", "-sFastImage=All", "-sOutputFile=-", "-"], 0x7ffcaa048890 /* 30 vars */) = 0
strace: Process 19062 attached
[pid 19062] execve("/usr/lib/cups/filter/c3pldrv", ["c3pldrv", "-i", "7", "-o", "10", ""], 0x7ffedcd812e0 /* 30 vars */) = -1 ENOENT (No such file or directory)
[pid 19062] execve("/usr/bin/c3pldrv", ["c3pldrv", "-i", "7", "-o", "10", ""], 0x7ffedcd812e0 /* 30 vars */) = 0
strace: [ Process PID=19062 runs in 32 bit mode. ]
[pid 19062] --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=19061, si_uid=7} ---
[pid 19062] +++ exited with 0 +++
[pid 19061] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19062, si_uid=7, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 19063 attached
[pid 19063] execve("/usr/lib/cups/filter/c3pldrv", ["c3pldrv", "-i", "6", "-o", "11", ""], 0x7ffedcd812e0 /* 30 vars */) = -1 ENOENT (No such file or directory)
[pid 19063] execve("/usr/bin/c3pldrv", ["c3pldrv", "-i", "6", "-o", "11", ""], 0x7ffedcd812e0 /* 30 vars */) = 0
strace: [ Process PID=19063 runs in 32 bit mode. ]
strace: Process 19064 attached
[pid 19064] execve("/usr/bin/cnpkmoduleufr2", ["cnpkmoduleufr2"], 0xffcac9e0 /* 30 vars */) = 0
[pid 19064] +++ exited with 1 +++
[pid 19063] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19064, si_uid=7, si_status=1, si_utime=0, si_stime=0} ---
strace: Process 19065 attached
[pid 19065] execve("/usr/bin/cnpkmoduleufr2", ["/usr/bin/cnpkmoduleufr2", "--format=2", "--output=1", "--cmd_fd=7", "--res_fd=13", "--dat_fd=14"], 0xffcac9e0 /* 30 vars */) = 0
[pid 19065] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 19065] +++ killed by SIGSEGV +++
[pid 19063] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=19065, si_uid=7, si_status=SIGSEGV, si_utime=0, si_stime=0} ---