124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/* uname - print system name Author: Earl Chew */
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/* Print the following system information as returned by the uname()
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* function:
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*
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* system name Minix
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* node name waddles
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* release name 1.5
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* version 10
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* machine name i86
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* arch i86 (Minix specific)
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*/
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#include <sys/types.h>
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#include <sys/utsname.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* Define the uname components. */
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#define ALL ((unsigned) 0x1F)
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#define SYSNAME ((unsigned) 0x01)
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#define NODENAME ((unsigned) 0x02)
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#define RELEASE ((unsigned) 0x04)
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#define U_MACHINE ((unsigned) 0x10)
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#define ARCH ((unsigned) 0x20)
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int main(int argc, char **argv );
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void print(int fd, ... );
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void usage(void );
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#ifdef __STDC__
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void print(int fd, ...)
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#else
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void print(fd)
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int fd;
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#endif
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{
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/* Print a sequence of strings onto the named channel. */
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va_list argp;
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char *p;
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va_start(argp, fd);
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while (1) {
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p = va_arg(argp, char *);
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if (p == (char *) NULL) break;
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write(fd, p, strlen(p));
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}
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va_end(argp);
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}
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char *name;
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void usage()
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{
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print(STDERR_FILENO, "Usage: ", name, " -snrvmpa\n", (char *) NULL);
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exit(EXIT_FAILURE);
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}
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int main(argc, argv)
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int argc;
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char **argv;
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{
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int info;
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char *p;
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struct utsname un;
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name = strrchr(argv[0], '/');
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if (name == NULL) name = argv[0]; else name++;
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for (info = 0; argc > 1; argc--, argv++) {
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if (argv[1][0] == '-') {
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for (p = &argv[1][1]; *p; p++) {
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switch (*p) {
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case 'a': info |= ALL; break;
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case 'm': info |= U_MACHINE; break;
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case 'n': info |= NODENAME; break;
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case 'r': info |= RELEASE; break;
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case 's': info |= SYSNAME; break;
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case 'v': info |= RELEASE; break;
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case 'p': info |= ARCH; break;
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default: usage();
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}
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}
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} else {
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usage();
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}
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}
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if (info == 0) info = strcmp(name, "arch") == 0 ? ARCH : SYSNAME;
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if (uname(&un) != 0) {
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print(STDERR_FILENO, "unable to determine uname values\n", (char *) NULL);
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exit(EXIT_FAILURE);
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}
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if ((info & SYSNAME) != 0)
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print(STDOUT_FILENO, un.sysname, (char *) NULL);
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if ((info & NODENAME) != 0) {
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if ((info & (SYSNAME)) != 0)
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print(STDOUT_FILENO, " ", (char *) NULL);
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print(STDOUT_FILENO, un.nodename, (char *) NULL);
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}
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if ((info & RELEASE) != 0) {
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if ((info & (SYSNAME|NODENAME)) != 0)
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print(STDOUT_FILENO, " ", (char *) NULL);
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print(STDOUT_FILENO, un.release, (char *) NULL);
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print(STDOUT_FILENO, ".", (char *) NULL);
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print(STDOUT_FILENO, un.version, (char *) NULL);
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}
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if ((info & U_MACHINE) != 0) {
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if ((info & (SYSNAME|NODENAME|RELEASE)) != 0)
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print(STDOUT_FILENO, " ", (char *) NULL);
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print(STDOUT_FILENO, un.machine, (char *) NULL);
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}
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if ((info & ARCH) != 0) {
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if ((info & (SYSNAME|NODENAME|RELEASE|U_MACHINE)) != 0)
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print(STDOUT_FILENO, " ", (char *) NULL);
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print(STDOUT_FILENO, un.arch, (char *) NULL);
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}
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print(STDOUT_FILENO, "\n", (char *) NULL);
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return EXIT_SUCCESS;
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}
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