new NOFORKs: pwdx,kill[all5],ttysize,realpath,readlink NOEXECs: date,resize

[oweals/busybox.git] / coreutils / date.c

diff --git a/coreutils/date.c b/coreutils/date.c
index 9d4a7dfeabeb1218e8d4529d2e6d1805561ccb34..89b281646e240ff2bb73c736c1523d3a38f15573 100644 (file)
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -19,19 +19,19 @@
    much as possible, missed out a lot of bounds checking */
 
 //config:config DATE
-//config:      bool "date"
+//config:      bool "date (7.1 kb)"
 //config:      default y
 //config:      help
-//config:        date is used to set the system date or display the
-//config:        current time in the given format.
+//config:      date is used to set the system date or display the
+//config:      current time in the given format.
 //config:
 //config:config FEATURE_DATE_ISOFMT
 //config:      bool "Enable ISO date format output (-I)"
 //config:      default y
 //config:      depends on DATE
 //config:      help
-//config:        Enable option (-I) to output an ISO-8601 compliant
-//config:        date/time string.
+//config:      Enable option (-I) to output an ISO-8601 compliant
+//config:      date/time string.
 //config:
 //config:# defaults to "no": stat's nanosecond field is a bit non-portable
 //config:config FEATURE_DATE_NANO
@@ -40,25 +40,25 @@
 //config:      depends on DATE  # syscall(__NR_clock_gettime)
 //config:      select PLATFORM_LINUX
 //config:      help
-//config:        Support %[num]N format specifier. Adds ~250 bytes of code.
+//config:      Support %[num]N format specifier. Adds ~250 bytes of code.
 //config:
 //config:config FEATURE_DATE_COMPAT
 //config:      bool "Support weird 'date MMDDhhmm[[YY]YY][.ss]' format"
 //config:      default y
 //config:      depends on DATE
 //config:      help
-//config:        System time can be set by 'date -s DATE' and simply 'date DATE',
-//config:        but formats of DATE string are different. 'date DATE' accepts
-//config:        a rather weird MMDDhhmm[[YY]YY][.ss] format with completely
-//config:        unnatural placement of year between minutes and seconds.
-//config:        date -s (and other commands like touch -d) use more sensible
-//config:        formats (for one, ISO format YYYY-MM-DD hh:mm:ss.ssssss).
+//config:      System time can be set by 'date -s DATE' and simply 'date DATE',
+//config:      but formats of DATE string are different. 'date DATE' accepts
+//config:      a rather weird MMDDhhmm[[YY]YY][.ss] format with completely
+//config:      unnatural placement of year between minutes and seconds.
+//config:      date -s (and other commands like touch -d) use more sensible
+//config:      formats (for one, ISO format YYYY-MM-DD hh:mm:ss.ssssss).
 //config:
-//config:        With this option off, 'date DATE' is 'date -s DATE' support
-//config:        the same format. With it on, 'date DATE' additionally supports
-//config:        MMDDhhmm[[YY]YY][.ss] format.
+//config:      With this option off, 'date DATE' is 'date -s DATE' support
+//config:      the same format. With it on, 'date DATE' additionally supports
+//config:      MMDDhhmm[[YY]YY][.ss] format.
 
-//applet:IF_DATE(APPLET(date, BB_DIR_BIN, BB_SUID_DROP))
+//applet:IF_DATE(APPLET_NOEXEC(date, date, BB_DIR_BIN, BB_SUID_DROP, date))
 
 //kbuild:lib-$(CONFIG_DATE) += date.o
 
@@ -66,7 +66,7 @@
  * date [OPTION]... [+FORMAT]
  * date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
  * -d, --date=STRING
- *      display time described by STRING, not `now'
+ *      display time described by STRING, not 'now'
  * -f, --file=DATEFILE
  *      like --date once for each line of DATEFILE
  * -r, --reference=FILE
@@ -152,12 +152,6 @@ enum {
        OPT_HINT      = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
 };
 
-static void maybe_set_utc(int opt)
-{
-       if (opt & OPT_UTC)
-               putenv((char*)"TZ=UTC0");
-}
-
 #if ENABLE_LONG_OPTS
 static const char date_longopts[] ALIGN1 =
                "rfc-822\0"   No_argument       "R"
@@ -170,6 +164,19 @@ static const char date_longopts[] ALIGN1 =
                ;
 #endif
 
+/* We are a NOEXEC applet.
+ * Obstacles to NOFORK:
+ * - we change env
+ * - xasprintf result not freed
+ * - after xasprintf we use other xfuncs
+ */
+
+static void maybe_set_utc(int opt)
+{
+       if (opt & OPT_UTC)
+               putenv((char*)"TZ=UTC0");
+}
+
 int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int date_main(int argc UNUSED_PARAM, char **argv)
 {