diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 24 |
1 files changed, 13 insertions, 11 deletions
@@ -739,21 +739,23 @@ redirect(const char *line, const char *makefile) else fatalerr("[mM]akefile is not present\n"); } - else - stat(makefile, &st); - if ((fdin = fopen(makefile, "r")) == NULL) - fatalerr("cannot open \"%s\"\n", makefile); + else { + if (stat(makefile, &st) != 0) + fatalerr("\"%s\" is not present\n", makefile); + } + snprintf(backup, sizeof(backup), "%s.bak", makefile); unlink(backup); -#if defined(WIN32) || defined(__CYGWIN__) - fclose(fdin); -#endif + + /* rename() won't work on WIN32, CYGWIN, or CIFS if src file is open */ if (rename(makefile, backup) < 0) fatalerr("cannot rename %s to %s\n", makefile, backup); -#if defined(WIN32) || defined(__CYGWIN__) - if ((fdin = fopen(backup, "r")) == NULL) - fatalerr("cannot open \"%s\"\n", backup); -#endif + if ((fdin = fopen(backup, "r")) == NULL) { + if (rename(backup, makefile) < 0) + warning("renamed %s to %s, but can't move it back\n", + makefile, backup); + fatalerr("cannot open \"%s\"\n", makefile); + } if ((fdout = freopen(makefile, "w", stdout)) == NULL) fatalerr("cannot open \"%s\"\n", backup); len = strlen(line); |