76 lines
1.2 KiB
C
76 lines
1.2 KiB
C
#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/utsname.h>
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/* sys node release version machine */
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int flags[] = {0, 0, 0, 0, 0};
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enum {
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O_SYS,
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O_NODE,
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O_RELEASE,
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O_VERSION,
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O_MACHINE,
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O_ALL
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};
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int main(int argc, char **argv) {
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int opt;
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while ((opt = getopt(argc, argv, "ashrvm")) != -1) {
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switch (opt) {
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case 'a':
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for (int i = 0; i < O_ALL; i++)
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flags[i] = 1;
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break;
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case 's':
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flags[O_SYS] = 1;
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break;
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case 'n':
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flags[O_NODE] = 1;
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break;
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case 'r':
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flags[O_RELEASE] = 1;
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break;
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case 'v':
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flags[O_VERSION] = 1;
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break;
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case 'm':
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flags[O_MACHINE] = 1;
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break;
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default:
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printf("uname [-a All] [-s Sys] [-n Nodename] [-r Release] [-v Version] [-m Machine]\n");
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return 0;
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}
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}
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struct utsname uts;
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if (uname(&uts)) {
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fprintf(stderr, "uname: %s", strerror(errno));
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return 1;
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}
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if (flags[O_SYS] || argc == 1)
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printf("%s ", uts.sysname);
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if (flags[O_NODE])
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printf("%s ", uts.nodename);
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if (flags[O_RELEASE])
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printf("%s ", uts.release);
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if (flags[O_VERSION])
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printf("%s ", uts.version);
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if (flags[O_MACHINE])
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printf("%s ", uts.machine);
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putchar('\n');
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}
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