diff options
Diffstat (limited to 'extra/scripts/unifdef.c')
| -rw-r--r-- | extra/scripts/unifdef.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/extra/scripts/unifdef.c b/extra/scripts/unifdef.c index f18bea853..0f059205f 100644 --- a/extra/scripts/unifdef.c +++ b/extra/scripts/unifdef.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2002 - 2013 Tony Finch <dot@dotat.at> + * Copyright (c) 2002 - 2014 Tony Finch <dot@dotat.at> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -207,6 +207,7 @@ static bool firstsym; /* ditto */ static int exitmode; /* exit status mode */ static int exitstat; /* program exit status */ +static bool altered; /* was this file modified? */ static void addsym1(bool, bool, char *); static void addsym2(bool, const char *, const char *); @@ -415,7 +416,11 @@ processinout(const char *ifn, const char *ofn) err(2, "can't rename \"%s\" to \"%s\"", ofn, backname); free(backname); } - if (replace(tempname, ofn) < 0) + /* leave file unmodified if unifdef made no changes */ + if (!altered && backext == NULL) { + if (remove(tempname) < 0) + warn("can't remove \"%s\"", tempname); + } else if (replace(tempname, ofn) < 0) err(2, "can't rename \"%s\" to \"%s\"", tempname, ofn); free(tempname); tempname = NULL; @@ -637,6 +642,7 @@ keywordedit(const char *replacement) { snprintf(keyword, tline + sizeof(tline) - keyword, "%s%s", replacement, newline); + altered = true; print(); } static void @@ -699,7 +705,7 @@ flushline(bool keep) } else { if (lnblank && fputs(newline, output) == EOF) closeio(); - exitstat = 1; + altered = true; delcount += 1; blankcount = 0; } @@ -751,6 +757,7 @@ process(void) zerosyms = true; newline = NULL; linenum = 0; + altered = false; while (lineval != LT_EOF) { lineval = parseline(); trans_table[ifstate[depth]][lineval](); @@ -758,6 +765,7 @@ process(void) linenum, linetype_name[lineval], ifstate_name[ifstate[depth]], depth); } + exitstat |= altered; } /* @@ -1097,14 +1105,12 @@ skiphash(void) { const char *cp; - if (linestate == LS_START) { - linenum++; - if (fgets(tline, MAXLINE, input) == NULL) { - if (ferror(input)) - err(2, "can't read %s", filename); - else - return (NULL); - } + linenum++; + if (fgets(tline, MAXLINE, input) == NULL) { + if (ferror(input)) + err(2, "can't read %s", filename); + else + return (NULL); } cp = skipcomment(tline); if (linestate == LS_START && *cp == '#') { @@ -1124,7 +1130,8 @@ skiphash(void) static const char * skipline(const char *cp) { - linestate = LS_DIRTY; + if (*cp != '\0') + linestate = LS_DIRTY; while (*cp != '\0') cp = skipcomment(cp + 1); return (cp); |