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arch: new applet (same as unmae -m). ~30 bytes.

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-07-16 16:43:41 +02:00
parent 9f904a22ff
commit c49638b7d2
1 changed files with 97 additions and 70 deletions
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57
coreutils/uname.c
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@ -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_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 */
@ -103,10 +119,19 @@ 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)
{
uname_info_t uname_info;
IF_UNAME(const char *unknown_str = "unknown";)
unsigned toprint;
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 */
@ -122,38 +147,39 @@ int uname_main(int argc UNUSED_PARAM, char **argv)
"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;
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;
}
} /* if "uname" */
#endif
uname(&uname_info.name); /* never fails */
#if defined(__sparc__) && defined(__linux__)
{
char *fake_sparc = getenv("FAKE_SPARC");
if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
strcpy(uname_info.name.machine, "sparc");
}
}
#endif
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);
@ -169,7 +195,6 @@ int uname_main(int argc UNUSED_PARAM, char **argv)
uname_info.platform[1] = '3';
}
# endif
delta = utsname_offset;
fmt = " %s" + 1;
do {
@ -183,6 +208,8 @@ int uname_main(int argc UNUSED_PARAM, char **argv)
++delta;
} while (toprint >>= 1);
bb_putchar('\n');
#endif
}
fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
}