[git commit] arch: new applet (same as unmae -m). ~30 bytes.
Denys Vlasenko
vda.linux at googlemail.com
Sun Jul 16 14:43:41 UTC 2017
commit: https://git.busybox.net/busybox/commit/?id=c49638b7d29e1010bfa95acbd013bf3268810bae
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
coreutils/uname.c | 165 +++++++++++++++++++++++++++++++-----------------------
1 file changed, 96 insertions(+), 69 deletions(-)
diff --git a/coreutils/uname.c b/coreutils/uname.c
index 4d98fde..9c6a06e 100644
--- a/coreutils/uname.c
+++ b/coreutils/uname.c
@@ -55,10 +55,20 @@
//config: help
//config: Sets the operating system name reported by uname -o. The
//config: default is "GNU/Linux".
+//config:
+//can't use "ARCH" for this applet, all hell breaks loose in build system :)
+//config:config BBARCH
+//config: bool "arch"
+//config: default y
+//config: help
+//config: Same as uname -m.
//applet:IF_UNAME(APPLET(uname, BB_DIR_BIN, BB_SUID_DROP))
+// APPLET_ODDNAME:name main location suid_type help
+//applet:IF_BBARCH(APPLET_ODDNAME(arch, uname, BB_DIR_BIN, BB_SUID_DROP, arch))
-//kbuild:lib-$(CONFIG_UNAME) += uname.o
+//kbuild:lib-$(CONFIG_UNAME) += uname.o
+//kbuild:lib-$(CONFIG_BBARCH) += uname.o
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */
@@ -81,6 +91,11 @@
//usage: "$ uname -a\n"
//usage: "Linux debian 2.4.23 #2 Tue Dec 23 17:09:10 MST 2003 i686 GNU/Linux\n"
+//usage:#define arch_trivial_usage
+//usage: ""
+//usage:#define arch_full_usage "\n\n"
+//usage: "Print system architecture"
+
#include "libbb.h"
/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h>
@@ -92,7 +107,8 @@ typedef struct {
char os[sizeof(CONFIG_UNAME_OSNAME)];
} uname_info_t;
-static const char options[] ALIGN1 = "snrvmpioa";
+#if ENABLE_UNAME
+#define options "snrvmpioa"
static const unsigned short utsname_offset[] = {
offsetof(uname_info_t, name.sysname), /* -s */
offsetof(uname_info_t, name.nodename), /* -n */
@@ -103,86 +119,97 @@ static const unsigned short utsname_offset[] = {
offsetof(uname_info_t, platform), /* -i */
offsetof(uname_info_t, os), /* -o */
};
+#endif
int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int uname_main(int argc UNUSED_PARAM, char **argv)
+int uname_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
-#if ENABLE_LONG_OPTS
- static const char uname_longopts[] ALIGN1 =
- /* name, has_arg, val */
- "all\0" No_argument "a"
- "kernel-name\0" No_argument "s"
- "nodename\0" No_argument "n"
- "kernel-release\0" No_argument "r"
- "release\0" No_argument "r"
- "kernel-version\0" No_argument "v"
- "machine\0" No_argument "m"
- "processor\0" No_argument "p"
- "hardware-platform\0" No_argument "i"
- "operating-system\0" No_argument "o"
- ;
-#endif
uname_info_t uname_info;
-#if defined(__sparc__) && defined(__linux__)
- char *fake_sparc = getenv("FAKE_SPARC");
-#endif
- const char *unknown_str = "unknown";
- const char *fmt;
- const unsigned short *delta;
+ IF_UNAME(const char *unknown_str = "unknown";)
unsigned toprint;
- IF_LONG_OPTS(applet_long_options = uname_longopts);
- toprint = getopt32(argv, options);
-
- if (argv[optind]) { /* coreutils-6.9 compat */
- bb_show_usage();
- }
-
- if (toprint & (1 << 8)) { /* -a => all opts on */
- toprint = (1 << 8) - 1;
- unknown_str = ""; /* -a does not print unknown fields */
- }
-
- if (toprint == 0) { /* no opts => -s (sysname) */
- toprint = 1;
- }
+ toprint = (1 << 4); /* "arch" = "uname -m" */
+
+#if ENABLE_UNAME
+ if (!ENABLE_BBARCH || applet_name[0] == 'u') {
+# if ENABLE_LONG_OPTS
+ static const char uname_longopts[] ALIGN1 =
+ /* name, has_arg, val */
+ "all\0" No_argument "a"
+ "kernel-name\0" No_argument "s"
+ "nodename\0" No_argument "n"
+ "kernel-release\0" No_argument "r"
+ "release\0" No_argument "r"
+ "kernel-version\0" No_argument "v"
+ "machine\0" No_argument "m"
+ "processor\0" No_argument "p"
+ "hardware-platform\0" No_argument "i"
+ "operating-system\0" No_argument "o"
+ ;
+# endif
+ IF_LONG_OPTS(applet_long_options = uname_longopts);
+ toprint = getopt32(argv, options);
+ if (argv[optind]) { /* coreutils-6.9 compat */
+ bb_show_usage();
+ }
+ if (toprint & (1 << 8)) { /* -a => all opts on */
+ toprint = (1 << 8) - 1;
+ unknown_str = ""; /* -a does not print unknown fields */
+ }
+ if (toprint == 0) { /* no opts => -s (sysname) */
+ toprint = 1;
+ }
+ } /* if "uname" */
+#endif
uname(&uname_info.name); /* never fails */
#if defined(__sparc__) && defined(__linux__)
- if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
- strcpy(uname_info.name.machine, "sparc");
- }
-#endif
- strcpy(uname_info.processor, unknown_str);
- strcpy(uname_info.platform, unknown_str);
- strcpy(uname_info.os, CONFIG_UNAME_OSNAME);
-#if 0
- /* Fedora does something like this */
- strcpy(uname_info.processor, uname_info.name.machine);
- strcpy(uname_info.platform, uname_info.name.machine);
- if (uname_info.platform[0] == 'i'
- && uname_info.platform[1]
- && uname_info.platform[2] == '8'
- && uname_info.platform[3] == '6'
- ) {
- uname_info.platform[1] = '3';
+ {
+ char *fake_sparc = getenv("FAKE_SPARC");
+ if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
+ strcpy(uname_info.name.machine, "sparc");
+ }
}
#endif
-
- delta = utsname_offset;
- fmt = " %s" + 1;
- do {
- if (toprint & 1) {
- const char *p = (char *)(&uname_info) + *delta;
- if (p[0]) {
- printf(fmt, p);
- fmt = " %s";
- }
+ if (ENABLE_BBARCH && (!ENABLE_UNAME || applet_name[0] == 'a')) {
+ puts(uname_info.name.machine);
+ } else {
+#if ENABLE_UNAME
+ /* "uname" */
+ const char *fmt;
+ const unsigned short *delta;
+
+ strcpy(uname_info.processor, unknown_str);
+ strcpy(uname_info.platform, unknown_str);
+ strcpy(uname_info.os, CONFIG_UNAME_OSNAME);
+# if 0
+ /* Fedora does something like this */
+ strcpy(uname_info.processor, uname_info.name.machine);
+ strcpy(uname_info.platform, uname_info.name.machine);
+ if (uname_info.platform[0] == 'i'
+ && uname_info.platform[1]
+ && uname_info.platform[2] == '8'
+ && uname_info.platform[3] == '6'
+ ) {
+ uname_info.platform[1] = '3';
}
- ++delta;
- } while (toprint >>= 1);
- bb_putchar('\n');
+# endif
+ delta = utsname_offset;
+ fmt = " %s" + 1;
+ do {
+ if (toprint & 1) {
+ const char *p = (char *)(&uname_info) + *delta;
+ if (p[0]) {
+ printf(fmt, p);
+ fmt = " %s";
+ }
+ }
+ ++delta;
+ } while (toprint >>= 1);
+ bb_putchar('\n');
+#endif
+ }
fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
}
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