ltrace

Library and system call tracer for programs

Ltrace is a program that runs the specified command until it exits. It intercepts and records the dynamic library calls that are called by the executed process and the signals that are received by that process. It can also intercept and print the system calls executed by the program. The program to trace need not be recompiled for this, so ltrace can be used on binaries for which no source is available. This is still a work in progress, so, for example, the tracking to child processes may fail or some things may not work as expected.