From ae7139adcfa65991c71616e8de7910ff722d4166 Mon Sep 17 00:00:00 2001 From: Dan McGee Date: Tue, 5 Jul 2011 14:16:17 -0500 Subject: Remove most usages of strncmp() The supposed safety blanket of this function is better handled by explicit length checking and usages of strlen() on known NULL-terminated strings rather than hoping things fit in a buffer. We also have no need to fully fill a PATH_MAX length variable with NULLs every time as long as a single terminating byte is there. Remove usages of it by using strcpy() or memcpy() as appropriate, after doing length checks via strlen(). Signed-off-by: Dan McGee --- src/pacman/query.c | 17 ++++++++++------- src/pacman/util.c | 11 ++++------- 2 files changed, 14 insertions(+), 14 deletions(-) (limited to 'src/pacman') diff --git a/src/pacman/query.c b/src/pacman/query.c index 90329b33..251c4dd6 100644 --- a/src/pacman/query.c +++ b/src/pacman/query.c @@ -110,8 +110,7 @@ static int query_fileowner(alpm_list_t *targets) int ret = 0; char path[PATH_MAX]; const char *root; - char *append; - size_t max_length; + size_t rootlen; alpm_list_t *t; alpm_db_t *db_local; @@ -125,9 +124,13 @@ static int query_fileowner(alpm_list_t *targets) * once, then we can just overwrite whatever file was there on the previous * iteration. */ root = alpm_option_get_root(config->handle); - strncpy(path, root, PATH_MAX - 1); - append = path + strlen(path); - max_length = PATH_MAX - (append - path) - 1; + rootlen = strlen(root); + if(rootlen + 1 > PATH_MAX) { + /* we are in trouble here */ + pm_fprintf(stderr, ALPM_LOG_ERROR, _("path too long: %s%s\n"), root, ""); + return 1; + } + strcpy(path, root); db_local = alpm_option_get_localdb(config->handle); @@ -208,11 +211,11 @@ static int query_fileowner(alpm_list_t *targets) continue; } - if(strlen(pkgfile) > max_length) { + if(rootlen + 1 + strlen(pkgfile) > PATH_MAX) { pm_fprintf(stderr, ALPM_LOG_ERROR, _("path too long: %s%s\n"), root, pkgfile); } /* concatenate our file and the root path */ - strcpy(append, pkgfile); + strcpy(path + rootlen, pkgfile); pdname = mdirname(path); ppath = resolve_path(pdname); diff --git a/src/pacman/util.c b/src/pacman/util.c index deb3e056..7065abdc 100644 --- a/src/pacman/util.c +++ b/src/pacman/util.c @@ -389,22 +389,21 @@ char *strreplace(const char *str, const char *needle, const char *replace) * x "size difference between replace and needle" */ newsz = strlen(str) + 1 + alpm_list_count(list) * (replacesz - needlesz); - newstr = malloc(newsz); + newstr = calloc(newsz, sizeof(char)); if(!newstr) { return NULL; } - *newstr = '\0'; p = str; newp = newstr; for(i = list; i; i = alpm_list_next(i)) { q = alpm_list_getdata(i); - if(q > p){ + if(q > p) { /* add chars between this occurence and last occurence, if any */ - strncpy(newp, p, (size_t)(q - p)); + memcpy(newp, p, (size_t)(q - p)); newp += q - p; } - strncpy(newp, replace, replacesz); + memcpy(newp, replace, replacesz); newp += replacesz; p = q + needlesz; } @@ -413,9 +412,7 @@ char *strreplace(const char *str, const char *needle, const char *replace) if(*p) { /* add the rest of 'p' */ strcpy(newp, p); - newp += strlen(p); } - *newp = '\0'; return newstr; } -- cgit v1.2.3-70-g09d2