1 files changed, 113 insertions, 0 deletions
diff --git a/semestr-5/so/lista0/lista_0/libapue/error.c b/semestr-5/so/lista0/lista_0/libapue/error.c
new file mode 100644
index 0000000..cb9060f
--- /dev/null
+++ b/semestr-5/so/lista0/lista_0/libapue/error.c
@@ -0,0 +1,113 @@
+#include "apue.h"
+#include <errno.h>  /* for definition of errno */
+#include <stdarg.h> /* ISO C variable aruments */
+
+static void err_doit(int, int, const char *, va_list);
+
+/*
+ * Nonfatal error related to a system call.
+ * Print a message and return.
+ */
+void err_ret(const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(1, errno, fmt, ap);
+  va_end(ap);
+}
+
+/*
+ * Fatal error related to a system call.
+ * Print a message and terminate.
+ */
+void err_sys(const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(1, errno, fmt, ap);
+  va_end(ap);
+  exit(1);
+}
+
+/*
+ * Nonfatal error unrelated to a system call.
+ * Error code passed as explict parameter.
+ * Print a message and return.
+ */
+void err_cont(int error, const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(1, error, fmt, ap);
+  va_end(ap);
+}
+
+/*
+ * Fatal error unrelated to a system call.
+ * Error code passed as explict parameter.
+ * Print a message and terminate.
+ */
+void err_exit(int error, const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(1, error, fmt, ap);
+  va_end(ap);
+  exit(1);
+}
+
+/*
+ * Fatal error related to a system call.
+ * Print a message, dump core, and terminate.
+ */
+void err_dump(const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(1, errno, fmt, ap);
+  va_end(ap);
+  abort(); /* dump core and terminate */
+  exit(1); /* shouldn't get here */
+}
+
+/*
+ * Nonfatal error unrelated to a system call.
+ * Print a message and return.
+ */
+void err_msg(const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(0, 0, fmt, ap);
+  va_end(ap);
+}
+
+/*
+ * Fatal error unrelated to a system call.
+ * Print a message and terminate.
+ */
+void err_quit(const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  err_doit(0, 0, fmt, ap);
+  va_end(ap);
+  exit(1);
+}
+
+/*
+ * Print a message and return to caller.
+ * Caller specifies "errnoflag".
+ */
+static void err_doit(int errnoflag, int error, const char *fmt, va_list ap) {
+  char buf[MAXLINE];
+
+  vsnprintf(buf, MAXLINE - 1, fmt, ap);
+  if (errnoflag)
+    snprintf(buf + strlen(buf), MAXLINE - strlen(buf) - 1, ": %s",
+             strerror(error));
+  strcat(buf, "\n");
+  fflush(stdout); /* in case stdout and stderr are the same */
+  fputs(buf, stderr);
+  fflush(NULL); /* flushes all stdio output streams */
+}