Author: Jason A. Donenfeld <Jason@zx2c4.com>
Fix gcc 8.1.1 compiler warnings
CC ../shared.o
../shared.c: In function ‘expand_macro’:
../shared.c:487:3: warning: ‘strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
strncpy(name, value, len);
^~~~~~~~~~~~~~~~~~~~~~~~~
../shared.c:484:9: note: length computed here
len = strlen(value);
^~~~~~~~~~~~~
../ui-shared.c: In function ‘cgit_repobasename’:
../ui-shared.c:136:2: warning: ‘strncpy’ specified bound 1024 equals destination size [-Wstringop-truncation]
strncpy(rvbuf, reponame, sizeof(rvbuf));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CC ../ui-ssdiff.o
../ui-ssdiff.c: In function ‘replace_tabs’:
../ui-ssdiff.c:142:4: warning: ‘strncat’ output truncated copying between 1 and 8 bytes from a string of length 8 [-Wstringop-truncation]
strncat(result, spaces, 8 - (strlen(result) % 8));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
shared.c | 7 ++++--- ui-shared.c | 19 ++++++++++++------- ui-ssdiff.c | 12 +++++++-----
diff --git a/shared.c b/shared.c index f7b64cf317ced6a7dd5ce33fce48e74c149c0e5f..609bd2a30670e5eab7974593fd98c6d9e95c24bc 100644 --- a/shared.c +++ b/shared.c @@ -476,15 +476,16 @@ */ static char *expand_macro(char *name, int maxlength) { char *value; - int len; + size_t len; len = 0; value = getenv(name); if (value) { - len = strlen(value); + len = strlen(value) + 1; if (len > maxlength) len = maxlength; - strncpy(name, value, len); + strlcpy(name, value, len); + --len; } return name + len; } diff --git a/ui-shared.c b/ui-shared.c index 066a470e5dd419b503bd4ff80646028079f844ad..739505a865cc7660621f28666474ec9c6d624718 100644 --- a/ui-shared.c +++ b/ui-shared.c @@ -133,20 +133,25 @@ /* I assume we don't need to store more than one repo basename */ static char rvbuf[1024]; int p; const char *rv; - strncpy(rvbuf, reponame, sizeof(rvbuf)); - if (rvbuf[sizeof(rvbuf)-1]) + size_t len; + + len = strlcpy(rvbuf, reponame, sizeof(rvbuf)); + if (len >= sizeof(rvbuf)) die("cgit_repobasename: truncated repository name '%s'", reponame); - p = strlen(rvbuf)-1; + p = len - 1; /* strip trailing slashes */ - while (p && rvbuf[p] == '/') rvbuf[p--] = 0; + while (p && rvbuf[p] == '/') + rvbuf[p--] = '\0'; /* strip trailing .git */ if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) { - p -= 3; rvbuf[p--] = 0; + p -= 3; + rvbuf[p--] = '\0'; } /* strip more trailing slashes if any */ - while ( p && rvbuf[p] == '/') rvbuf[p--] = 0; + while (p && rvbuf[p] == '/') + rvbuf[p--] = '\0'; /* find last slash in the remaining string */ - rv = strrchr(rvbuf,'/'); + rv = strrchr(rvbuf, '/'); if (rv) return ++rv; return rvbuf; diff --git a/ui-ssdiff.c b/ui-ssdiff.c index 7f261ed53a0077fa3fd4a8dab3db1fcdcf247a8c..68c2044dcc75c8ab58df847c36e0debe3665acba 100644 --- a/ui-ssdiff.c +++ b/ui-ssdiff.c @@ -114,11 +114,10 @@ static char *replace_tabs(char *line) { char *prev_buf = line; char *cur_buf; - int linelen = strlen(line); + size_t linelen = strlen(line); int n_tabs = 0; int i; char *result; - char *spaces = " "; if (linelen == 0) { result = xmalloc(1); @@ -126,20 +125,23 @@ result[0] = '\0'; return result; } - for (i = 0; i < linelen; i++) + for (i = 0; i < linelen; i++) { if (line[i] == '\t') n_tabs += 1; + } result = xmalloc(linelen + n_tabs * 8 + 1); result[0] = '\0'; - while (1) { + for (;;) { cur_buf = strchr(prev_buf, '\t'); if (!cur_buf) { strcat(result, prev_buf); break; } else { strncat(result, prev_buf, cur_buf - prev_buf); - strncat(result, spaces, 8 - (strlen(result) % 8)); + linelen = strlen(result); + memset(&result[linelen], ' ', 8 - (linelen % 8)); + result[linelen + 8 - (linelen % 8)] = '\0'; } prev_buf = cur_buf + 1; }