Tag Archives: Strace

Example for – Trace all system calls which involve process management

$strace -e trace=process python dig.py execve(“/usr/bin/python”, [“python”, “dig.py”], [/* 39 vars */]) = 0 arch_prctl(ARCH_SET_FS, 0x7feb563b4700) = 0 I think lscpu command is using proc filesystem to get data. /* /sys paths */ #define _PATH_SYS_SYSTEM “/sys/devices/system” #define _PATH_SYS_CPU _PATH_SYS_SYSTEM “/cpu” #define _PATH_SYS_NODE _PATH_SYS_SYSTEM “/node” #define _PATH_PROC_XEN “/proc/xen” #define _PATH_PROC_XENCAP _PATH_PROC_XEN “/capabilities” #define _PATH_PROC_CPUINFO “/proc/cpuinfo” #define …

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Hacking with strace to find about write calls in a program

$strace -e write python dig.py write(1, “\33[31mI think lscpu command is us”…, 69I think lscpu command is using proc filesystem to get data. ) = 69 write(1, “\33[31m/* /sys paths */\33[0m\n”, 26/* /sys paths */ ) = 26 write(1, “\33[31m#define _PATH_SYS_SYSTEM “…, 63#define _PATH_SYS_SYSTEM “/sys/devices/system” ) = 63 write(1, “\33[31m#define _PATH_SYS_CPU “…, 65#define _PATH_SYS_CPU _PATH_SYS_SYSTEM …

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