--- src/file.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- src/file.c +++ src/file.c 2018-06-12 14:16:45.847489541 +0000 @@ -242,6 +242,8 @@ main(int argc, char *argv[]) flags |= MAGIC_ERROR; break; case 'e': + if (!optarg) + usage(); for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) if (strcmp(nv[i].name, optarg) == 0) break; @@ -253,7 +255,7 @@ main(int argc, char *argv[]) break; case 'f': - if(action) + if(action || !optarg) usage(); if (magic == NULL) if ((magic = load(magicfile, flags)) == NULL) @@ -263,6 +265,8 @@ main(int argc, char *argv[]) ++didsomefiles; break; case 'F': + if (!optarg) + usage(); separator = optarg; break; case 'i': @@ -275,6 +279,8 @@ main(int argc, char *argv[]) action = FILE_LIST; break; case 'm': + if (!optarg) + usage(); magicfile = optarg; break; case 'n':