diff options
| -rw-r--r-- | usr.bin/patch/backupfile.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/usr.bin/patch/backupfile.c b/usr.bin/patch/backupfile.c index d9e40bcba7e..ed0767762e0 100644 --- a/usr.bin/patch/backupfile.c +++ b/usr.bin/patch/backupfile.c @@ -1,4 +1,4 @@ -/* $OpenBSD: backupfile.c,v 1.21 2013/11/26 13:19:07 deraadt Exp $ */ +/* $OpenBSD: backupfile.c,v 1.22 2020/10/12 13:58:27 naddy Exp $ */ /* * backupfile.c -- make Emacs style backup file names Copyright (C) 1990 Free @@ -53,21 +53,32 @@ static void invalid_arg(const char *, const char *, int); char * find_backup_file_name(const char *file) { - char *dir, *base_versions; + char *dir, *base_versions, *tmp_file; int highest_backup; if (backup_type == simple) return concat(file, simple_backup_suffix); - base_versions = concat(basename(file), ".~"); + tmp_file = strdup(file); + if (tmp_file == NULL) + return NULL; + base_versions = concat(basename(tmp_file), ".~"); + free(tmp_file); if (base_versions == NULL) return NULL; - dir = dirname(file); + tmp_file = strdup(file); + if (tmp_file == NULL) { + free(base_versions); + return NULL; + } + dir = dirname(tmp_file); if (dir == NULL) { free(base_versions); + free(tmp_file); return NULL; } highest_backup = max_backup_version(base_versions, dir); free(base_versions); + free(tmp_file); if (backup_type == numbered_existing && highest_backup == 0) return concat(file, simple_backup_suffix); return make_version_name(file, highest_backup + 1); |