xargs: shrink code, ~80 bytes

applets.h: +#undef APPLET_NOEXEC

diff --git a/findutils/xargs.c b/findutils/xargs.c
index 44dbcda..ea7c220 100644 (file)
--- a/findutils/xargs.c
+++ b/findutils/xargs.c
@@ -30,17 +30,17 @@
 
 
 #ifdef TEST
-# ifndef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
-#  define CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+# ifndef ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION
+#  define ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION 1
 # endif
-# ifndef CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
-#  define CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
+# ifndef ENABLE_FEATURE_XARGS_SUPPORT_QUOTES
+#  define ENABLE_FEATURE_XARGS_SUPPORT_QUOTES 1
 # endif
-# ifndef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
-#  define CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+# ifndef ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT
+#  define ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT 1
 # endif
-# ifndef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
-#  define CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
+# ifndef ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
+#  define ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM 1
 # endif
 #endif
 
@@ -94,20 +94,20 @@ static int xargs_exec(char *const *args)
 }
 
 
-typedef struct xlist_s {
+typedef struct xlist_t {
        char *data;
-       size_t lenght;
-       struct xlist_s *link;
+       size_t length;
+       struct xlist_t *link;
 } xlist_t;
 
-static int eof_stdin_detected;
+static smallint eof_stdin_detected;
 
 #define ISBLANK(c) ((c) == ' ' || (c) == '\t')
 #define ISSPACE(c) (ISBLANK(c) || (c) == '\n' || (c) == '\r' \
                    || (c) == '\f' || (c) == '\v')
 
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_QUOTES
-static xlist_t *process_stdin(xlist_t * list_arg,
+#if ENABLE_FEATURE_XARGS_SUPPORT_QUOTES
+static xlist_t *process_stdin(xlist_t *list_arg,
        const char *eof_str, size_t mc, char *buf)
 {
 #define NORM      0
@@ -125,16 +125,18 @@ static xlist_t *process_stdin(xlist_t * list_arg,
        xlist_t *cur;
        xlist_t *prev;
 
-       for (prev = cur = list_arg; cur; cur = cur->link) {
-               line_l += cur->lenght;  /* previous allocated */
-               if (prev != cur)
-                       prev = prev->link;
+       cur = list_arg;
+       while (1) {
+               prev = cur;
+               if (!cur) break;
+               line_l += cur->length;
+               cur = cur->link;
        }
 
        while (!eof_stdin_detected) {
                c = getchar();
                if (c == EOF) {
-                       eof_stdin_detected++;
+                       eof_stdin_detected = 1;
                        if (s)
                                goto unexpected_eof;
                        break;
@@ -183,22 +185,22 @@ set:
                        }
                        /* word loaded */
                        if (eof_str) {
-                               eof_str_detected = strcmp(s, eof_str) == 0;
+                               eof_str_detected = (strcmp(s, eof_str) == 0);
                        }
                        if (!eof_str_detected) {
-                               size_t lenght = (p - buf);
+                               size_t length = (p - buf);
 
-                               cur = xmalloc(sizeof(xlist_t) + lenght);
-                               cur->data = memcpy(cur + 1, s, lenght);
-                               cur->lenght = lenght;
-                               cur->link = NULL;
+                               cur = xzalloc(sizeof(xlist_t) + length);
+                               cur->data = memcpy(cur + 1, s, length);
+                               cur->length = length;
+                               /*cur->link = NULL;*/
                                if (prev == NULL) {
                                        list_arg = cur;
                                } else {
                                        prev->link = cur;
                                }
                                prev = cur;
-                               line_l += lenght;
+                               line_l += length;
                                if (line_l > mc) {
                                        /* stop memory usage :-) */
                                        break;
@@ -212,28 +214,30 @@ set:
 }
 #else
 /* The variant does not support single quotes, double quotes or backslash */
-static xlist_t *process_stdin(xlist_t * list_arg,
-       const char *eof_str, size_t mc, char *buf)
+static xlist_t *process_stdin(xlist_t *list_arg,
+               const char *eof_str, size_t mc, char *buf)
 {
 
        int c;                  /* current char */
-       int eof_str_detected = 0;
+       char eof_str_detected = 0;
        char *s = NULL;         /* start word */
        char *p = NULL;         /* pointer to end word */
        size_t line_l = 0;      /* size loaded args line */
        xlist_t *cur;
        xlist_t *prev;
 
-       for (prev = cur = list_arg; cur; cur = cur->link) {
-               line_l += cur->lenght;  /* previous allocated */
-               if (prev != cur)
-                       prev = prev->link;
+       cur = list_arg;
+       while (1) {
+               prev = cur;
+               if (!cur) break;
+               line_l += cur->length;
+               cur = cur->link;
        }
 
        while (!eof_stdin_detected) {
                c = getchar();
                if (c == EOF) {
-                       eof_stdin_detected++;
+                       eof_stdin_detected = 1;
                }
                if (eof_str_detected)
                        continue;
@@ -250,22 +254,22 @@ static xlist_t *process_stdin(xlist_t * list_arg,
                if (c == EOF) { /* word's delimiter or EOF detected */
                        /* word loaded */
                        if (eof_str) {
-                               eof_str_detected = strcmp(s, eof_str) == 0;
+                               eof_str_detected = (strcmp(s, eof_str) == 0);
                        }
                        if (!eof_str_detected) {
-                               size_t lenght = (p - buf);
+                               size_t length = (p - buf);
 
-                               cur = xmalloc(sizeof(xlist_t) + lenght);
-                               cur->data = memcpy(cur + 1, s, lenght);
-                               cur->lenght = lenght;
-                               cur->link = NULL;
+                               cur = xzalloc(sizeof(xlist_t) + length);
+                               cur->data = memcpy(cur + 1, s, length);
+                               cur->length = length;
+                               /*cur->link = NULL;*/
                                if (prev == NULL) {
                                        list_arg = cur;
                                } else {
                                        prev->link = cur;
                                }
                                prev = cur;
-                               line_l += lenght;
+                               line_l += length;
                                if (line_l > mc) {
                                        /* stop memory usage :-) */
                                        break;
@@ -276,39 +280,34 @@ static xlist_t *process_stdin(xlist_t * list_arg,
        }
        return list_arg;
 }
-#endif /* CONFIG_FEATURE_XARGS_SUPPORT_QUOTES */
+#endif /* FEATURE_XARGS_SUPPORT_QUOTES */
 
 
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION
+#if ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION
 /* Prompt the user for a response, and
    if the user responds affirmatively, return true;
-   otherwise, return false. Used "/dev/tty", not stdin. */
+   otherwise, return false. Uses "/dev/tty", not stdin. */
 static int xargs_ask_confirmation(void)
 {
-       static FILE *tty_stream;
+       FILE *tty_stream;
        int c, savec;
 
-       if (!tty_stream) {
-               tty_stream = xfopen(CURRENT_TTY, "r");
-               /* pranoidal security by vodz */
-               fcntl(fileno(tty_stream), F_SETFD, FD_CLOEXEC);
-       }
+       tty_stream = xfopen(CURRENT_TTY, "r");
        fputs(" ?...", stderr);
        fflush(stderr);
        c = savec = getc(tty_stream);
        while (c != EOF && c != '\n')
                c = getc(tty_stream);
-       if (savec == 'y' || savec == 'Y')
-               return 1;
-       return 0;
+       fclose(tty_stream);
+       return (savec == 'y' || savec == 'Y');
 }
 #else
 # define xargs_ask_confirmation() 1
-#endif /* CONFIG_FEATURE_XARGS_SUPPORT_CONFIRMATION */
+#endif /* FEATURE_XARGS_SUPPORT_CONFIRMATION */
 
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM
-static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str ATTRIBUTE_UNUSED,
-                                                          size_t mc, char *buf)
+#if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM
+static xlist_t *process0_stdin(xlist_t *list_arg,
+               const char *eof_str ATTRIBUTE_UNUSED, size_t mc, char *buf)
 {
        int c;                  /* current char */
        char *s = NULL;         /* start word */
@@ -317,16 +316,18 @@ static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str ATTRIBUTE
        xlist_t *cur;
        xlist_t *prev;
 
-       for (prev = cur = list_arg; cur; cur = cur->link) {
-               line_l += cur->lenght;  /* previous allocated */
-               if (prev != cur)
-                       prev = prev->link;
+       cur = list_arg;
+       while (1) {
+               prev = cur;
+               if (!cur) break;
+               line_l += cur->length;
+               cur = cur->link;
        }
 
        while (!eof_stdin_detected) {
                c = getchar();
                if (c == EOF) {
-                       eof_stdin_detected++;
+                       eof_stdin_detected = 1;
                        if (s == NULL)
                                break;
                        c = 0;
@@ -338,19 +339,19 @@ static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str ATTRIBUTE
                *p++ = c;
                if (c == 0) {   /* word's delimiter or EOF detected */
                        /* word loaded */
-                       size_t lenght = (p - buf);
+                       size_t length = (p - buf);
 
-                       cur = xmalloc(sizeof(xlist_t) + lenght);
-                       cur->data = memcpy(cur + 1, s, lenght);
-                       cur->lenght = lenght;
-                       cur->link = NULL;
+                       cur = xzalloc(sizeof(xlist_t) + length);
+                       cur->data = memcpy(cur + 1, s, length);
+                       cur->length = length;
+                       /*cur->link = NULL;*/
                        if (prev == NULL) {
                                list_arg = cur;
                        } else {
                                prev->link = cur;
                        }
                        prev = cur;
-                       line_l += lenght;
+                       line_l += length;
                        if (line_l > mc) {
                                /* stop memory usage :-) */
                                break;
@@ -360,7 +361,7 @@ static xlist_t *process0_stdin(xlist_t * list_arg, const char *eof_str ATTRIBUTE
        }
        return list_arg;
 }
-#endif /* CONFIG_FEATURE_XARGS_SUPPORT_ZERO_TERM */
+#endif /* FEATURE_XARGS_SUPPORT_ZERO_TERM */
 
 /* Correct regardless of combination of CONFIG_xxx */
 enum {
@@ -413,8 +414,8 @@ int xargs_main(int argc, char **argv)
        if (opt & OPT_ZEROTERM)
                USE_FEATURE_XARGS_SUPPORT_ZERO_TERM(read_args = process0_stdin);
 
-       argc -= optind;
        argv += optind;
+       argc -= optind;
        if (!argc) {
                /* default behavior is to echo all the filenames */
                *argv = (char*)"echo";
@@ -458,9 +459,9 @@ int xargs_main(int argc, char **argv)
                opt |= OPT_NO_EMPTY;
                n = 0;
                n_chars = 0;
-#ifdef CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT
+#if ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT
                for (cur = list; cur;) {
-                       n_chars += cur->lenght;
+                       n_chars += cur->length;
                        n++;
                        cur = cur->link;
                        if (n_chars > n_max_chars || (n == n_max_arg && cur)) {
@@ -471,13 +472,13 @@ int xargs_main(int argc, char **argv)
                }
 #else
                for (cur = list; cur; cur = cur->link) {
-                       n_chars += cur->lenght;
+                       n_chars += cur->length;
                        n++;
                        if (n_chars > n_max_chars || n == n_max_arg) {
                                break;
                        }
                }
-#endif /* CONFIG_FEATURE_XARGS_SUPPORT_TERMOPT */
+#endif /* FEATURE_XARGS_SUPPORT_TERMOPT */
 
                /* allocate pointers for execvp:
                   argc*arg, n*arg from stdin, NULL */
@@ -517,7 +518,8 @@ int xargs_main(int argc, char **argv)
                        break;
                }
        }
-       if (ENABLE_FEATURE_CLEAN_UP) free(max_chars);
+       if (ENABLE_FEATURE_CLEAN_UP)
+               free(max_chars);
        return child_error;
 }
 

diff --git a/include/applets.h b/include/applets.h
index f20b796..0139038 100644 (file)
--- a/include/applets.h
+++ b/include/applets.h
@@ -14,8 +14,8 @@
 /*
 name  - applet name as it is typed on command line
 name2 - applet name, converted to C (ether-wake: name2 = ether_wake)
-main  - <applet>_main part (e.g. for bzcat: main = bunzip2)
-l     - location ([/usr]/[s]bin)
+main  - corresponding <applet>_main to call (bzcat: main = bunzip2)
+l     - location to install link to: [/usr]/[s]bin
 s     - suid type:
         _BB_SUID_ALWAYS: will complain if busybox isn't suid
         and is run by non-root (applet_main() will not be called at all)
@@ -363,3 +363,4 @@ USE_ZCIP(APPLET(zcip, _BB_DIR_SBIN, _BB_SUID_NEVER))
 #undef APPLET_NOUSAGE
 #undef APPLET_ODDNAME
 #undef APPLET_NOEXEC
+#undef APPLET_NOFORK