spl0its-r-us)-[/code/Projects/elfread]
└─$ valgrind -s ./elfread --file .elfread
==176056== Memcheck, a memory error detector
==176056== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==176056== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==176056== Command: ./elfread --file .elfread
==176056==
==176056== Invalid read of size 1
==176056== at 0x483FEE0: strncmp (vg_replace_strmem.c:709)
==176056== by 0x4948AA0: process_long_option (getopt.c:212)
==176056== by 0x494943E: _getopt_internal_r (getopt.c:650)
==176056== by 0x49496A0: _getopt_internal (getopt.c:711)
==176056== by 0x494971D: getopt_long (getopt1.c:31)
==176056== by 0x10B2C4: main (in /code/Projects/elfread/elfread)
==176056== Address 0x1 is not stack'd, malloc'd or (recently) free'd
==176056==
==176056==
==176056== Process terminating with default action of signal 11 (SIGSEGV)
==176056== Access not within mapped region at address 0x1
==176056== at 0x483FEE0: strncmp (vg_replace_strmem.c:709)
==176056== by 0x4948AA0: process_long_option (getopt.c:212)
==176056== by 0x494943E: _getopt_internal_r (getopt.c:650)
==176056== by 0x49496A0: _getopt_internal (getopt.c:711)
==176056== by 0x494971D: getopt_long (getopt1.c:31)
==176056== by 0x10B2C4: main (in /code/Projects/elfread/elfread)
==176056== If you believe this happened as a result of a stack
==176056== overflow in your program's main thread (unlikely but
==176056== possible), you can try to increase the size of the
==176056== main thread stack using the --main-stacksize= flag.
==176056== The main thread stack size used in this run was 8388608.
==176056==
==176056== HEAP SUMMARY:
==176056== in use at exit: 0 bytes in 0 blocks
==176056== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==176056==
==176056== All heap blocks were freed -- no leaks are possible
==176056==
==176056== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
==176056==
==176056== 1 errors in context 1 of 1:
==176056== Invalid read of size 1
==176056== at 0x483FEE0: strncmp (vg_replace_strmem.c:709)
==176056== by 0x4948AA0: process_long_option (getopt.c:212)
==176056== by 0x494943E: _getopt_internal_r (getopt.c:650)
==176056== by 0x49496A0: _getopt_internal (getopt.c:711)
==176056== by 0x494971D: getopt_long (getopt1.c:31)
==176056== by 0x10B2C4: main (in /code/Projects/elfread/elfread)
==176056== Address 0x1 is not stack'd, malloc'd or (recently) free'd
==176056==
==176056== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
zsh: segmentation fault valgrind -s ./elfread --file .elfread

Remove new lines from the above macros

Calling stat() before locking the file with fopen() is a security issue. Use fopen() first to lock the file then use fstat() instead of stat().

Overview

• Display the information contained in the file's segment headers, if it has any

Additional context

• The output should mimic readelf -l

this should be --file-header and --program-headers.