httpd: fix buglet in hex conversion. Remove alloca NULL checks

(never happens, app just crashes if stack overflows)
svlogd: cosmetic messages and style fixes

2 files changed, 30 insertions, 30 deletions

diff --git a/networking/httpd.c b/networking/httpd.c
index 7e60fc252..a888c2424 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -163,7 +163,7 @@ enum {
 #endif
 };
 
-static const uint16_t http_response_type[] = {
+static const uint16_t http_response_type[] ALIGN2 = {
         HTTP_OK,
         HTTP_MOVED_TEMPORARILY,
         HTTP_REQUEST_TIMEOUT,
@@ -287,8 +287,6 @@ struct globals {
 } while (0)
 
 
-
-
 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
 
 /* Prototypes */
@@ -467,11 +465,6 @@ static void parse_conf(const char *path, int flag)
 
         if (flag == SUBDIR_PARSE || cf == NULL) {
                 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
-                if (cf == NULL) {
-                        if (flag == FIRST_PARSE)
-                                bb_error_msg_and_die(bb_msg_memory_exhausted);
-                        return;
-                }
                 sprintf((char *)cf, "%s/%s", path, httpd_conf);
         }
 
@@ -554,7 +547,7 @@ static void parse_conf(const char *path, int flag)
                         /* error status code */
                         int status = atoi(++p0);
                         /* c already points at the character following ':' in parse loop */
-                        // c = strchr(p0, ':'); c++;
+                        /* c = strchr(p0, ':'); c++; */
                         if (status < HTTP_CONTINUE) {
                                 bb_error_msg("config error '%s' in '%s'", buf, cf);
                                 continue;
@@ -575,9 +568,7 @@ static void parse_conf(const char *path, int flag)
                 if (*p0 == '/') {
                         /* make full path from httpd root / current_path / config_line_path */
                         cf = (flag == SUBDIR_PARSE ? path : "");
-                        p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
-                        if (p0 == NULL)
-                                continue;
+                        p0 = xmalloc(strlen(cf) + (c - buf) + 2 + strlen(c));
                         c[-1] = '\0';
                         sprintf(p0, "/%s%s", cf, buf);
 
@@ -694,9 +685,11 @@ static char *encodeString(const char *string)
         char ch;
 
         while ((ch = *string++)) {
-                // very simple check for what to encode
-                if (isalnum(ch)) *p++ = ch;
-                else p += sprintf(p, "&#%d;", (unsigned char) ch);
+                /* very simple check for what to encode */
+                if (isalnum(ch))
+                        *p++ = ch;
+                else
+                        p += sprintf(p, "&#%d;", (unsigned char) ch);
         }
         *p = '\0';
         return out;
@@ -717,18 +710,21 @@ static char *encodeString(const char *string)
  */
 static unsigned hex_to_bin(unsigned char c)
 {
-        unsigned v = c | 0x20; /* lowercase */
-        v = v - '0';
+        unsigned v;
+
+        v = c - '0';
         if (v <= 9)
                 return v;
-        v = v + ('0' - 'a');
+        /* c | 0x20: letters to lower case, non-letters
+         * to (potentially different) non-letters */
+        v = (unsigned)(c | 0x20) - 'a';
         if (v <= 5)
                 return v + 10;
         return ~0;
 }
 /* For testing:
-void t(char c) { printf("'%c' %u\n", c, hex_to_bin(c)); }
-int main() { t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
+void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
+int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
 t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
 */
 static char *decodeString(char *orig, int option_d)
diff --git a/runit/svlogd.c b/runit/svlogd.c
index b8fa5645b..6c8747e96 100644
--- a/runit/svlogd.c
+++ b/runit/svlogd.c
@@ -513,22 +513,25 @@ static unsigned logdir_open(struct logdir *ld, const char *fn)
         /* read config */
         i = open_read_close("config", buf, sizeof(buf));
         if (i < 0 && errno != ENOENT)
-                bb_perror_msg(WARNING": %s/config", ld->name);
+                bb_perror_msg(WARNING"%s/config", ld->name);
         if (i > 0) {
                 if (verbose)
                         bb_error_msg(INFO"read: %s/config", ld->name);
                 s = buf;
                 while (s) {
                         np = strchr(s, '\n');
-                        if (np) *np++ = '\0';
+                        if (np)
+                                *np++ = '\0';
                         switch (s[0]) {
                         case '+':
                         case '-':
                         case 'e':
                         case 'E':
+                                /* Add '\n'-terminated line to ld->inst */
                                 while (1) {
-                                        int l = asprintf(&new, "%s%s\n", ld->inst?:"", s);
-                                        if (l >= 0 && new) break;
+                                        int l = asprintf(&new, "%s%s\n", ld->inst ? : "", s);
+                                        if (l >= 0 && new)
+                                                break;
                                         pause_nomem();
                                 }
                                 free(ld->inst);
@@ -578,7 +581,8 @@ static unsigned logdir_open(struct logdir *ld, const char *fn)
                 s = ld->inst;
                 while (s) {
                         np = strchr(s, '\n');
-                        if (np) *np++ = '\0';
+                        if (np)
+                                *np++ = '\0';
                         s = np;
                 }
         }
@@ -586,7 +590,7 @@ static unsigned logdir_open(struct logdir *ld, const char *fn)
         /* open current */
         i = stat("current", &st);
         if (i != -1) {
-                if (st.st_size && ! (st.st_mode & S_IXUSR)) {
+                if (st.st_size && !(st.st_mode & S_IXUSR)) {
                         ld->fnsave[25] = '.';
                         ld->fnsave[26] = 'u';
                         ld->fnsave[27] = '\0';
@@ -600,8 +604,9 @@ static unsigned logdir_open(struct logdir *ld, const char *fn)
                         rmoldest(ld);
                         i = -1;
                 } else {
-                        /* Be paranoid: st.st_size can be not just bigger, but WIDER! */
-                        /* (bug in original svlogd. remove this comment when fixed there) */
+                        /* st.st_size can be not just bigger, but WIDER!
+                         * This code is safe: if st.st_size > 4GB, we select
+                         * ld->sizemax (because it's "unsigned") */
                         ld->size = (st.st_size > ld->sizemax) ? ld->sizemax : st.st_size;
                 }
         } else {
@@ -667,7 +672,7 @@ static int buffer_pread(int fd, char *s, unsigned len)
         int i;
 
         input.fd = 0;
-        input.events = POLLIN|POLLHUP|POLLERR;
+        input.events = POLLIN;
 
         do {
                 if (rotateasap) {
@@ -744,7 +749,6 @@ static int buffer_pread(int fd, char *s, unsigned len)
         return i;
 }
 
-
 static void sig_term_handler(int sig_no)
 {
         if (verbose)