diff options
Diffstat (limited to 'uname.c')
| -rw-r--r-- | uname.c | 39 |
1 files changed, 27 insertions, 12 deletions
@@ -17,14 +17,12 @@ * */ +#define _POSIX_C_SOURCE 2 #include <stdio.h> -#include <getopt.h> #include <sys/utsname.h> +#include <unistd.h> -const char *uname_desc = "return system name"; -const char *uname_inv = "uname [-amnrsv]"; - -int main(int argc, char **argv) +int main(int argc, char *argv[]) { int c; int machine = 0; @@ -35,7 +33,7 @@ int main(int argc, char **argv) struct utsname uts; int space = 0; - while ((c = getopt(argc, argv, ":amnrsv")) != -1) { + while ((c = getopt(argc, argv, "amnrsv")) != -1) { switch (c) { case 'a': machine = 1; @@ -44,44 +42,61 @@ int main(int argc, char **argv) sysname = 1; version = 1; break; + case 'm': machine = 1; break; + case 'n': nodename = 1; break; + case 'r': release = 1; break; + case 's': sysname = 1; break; + case 'v': version = 1; break; + default: return 1; } } - if (optind < argc) + if (optind < argc) { return 1; + } if (machine == 0 && nodename == 0 && release == 0 && version == 0) sysname = 1; uname(&uts); - if (sysname) + if (sysname) { space = printf("%s", uts.sysname); - if (nodename) + } + + if (nodename) { space = printf("%s%s", space ? " " : "", uts.nodename); - if (release) + } + + if (release) { space = printf("%s%s", space ? " " : "", uts.release); - if (version) + } + + if (version) { space = printf("%s%s", space ? " " : "", uts.version); - if (machine) + } + + if (machine) { space = printf("%s%s", space ? " " : "", uts.machine); + } + printf("\n"); return 0; |