#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
+extern void escape_display_name (char *, size_t);
+
int
main(int argc, char *argv[])
{
struct passwd *pwd;
+ char buf[BUFSIZ], *p;
+
+ if (argc < 2) {
+ pwd = getpwuid(getuid());
- pwd = getpwuid(getuid());
+ if (! pwd) {
+ fprintf(stderr, "Unable to retrieve user info for "
+ "userid %ld\n", (long) getuid());
+ exit(1);
+ }
- if (! pwd) {
- fprintf(stderr, "Unable to retrieve user info for "
- "userid %d\n", getuid());
- exit(1);
+ strncpy(buf, pwd->pw_gecos, sizeof(buf));
+ buf[sizeof(buf) - 1] = '\0';
+ } else if (argc == 2) {
+ strncpy(buf, argv[1], sizeof(buf));
+ } else if (argc > 2) {
+ fprintf (stderr, "usage: %s [name]\n", argv[0]);
+ return 1;
}
- printf("%s\n", pwd->pw_gecos);
+ /*
+ * Perform the same processing that getuserinfo() does.
+ */
+
+ /*
+ * Stop at the first comma.
+ */
+ if ((p = strchr(buf, ',')))
+ *p = '\0';
+
+ /*
+ * Quote the entire string if it has a special character in it.
+ */
+ escape_display_name (buf, sizeof(buf));
+
+ printf("%s\n", buf);
exit(0);
}