Remove some dead code

tool/build/sha256sum.c

@@ -28,17 +28,15 @@
 #include "third_party/getopt/getopt.internal.h"
 #include "third_party/mbedtls/sha256.h"
 
-#define PROG "sha256sum"
 #define USAGE \
-  "\
-Usage: " PROG " [-?hbctw] [PATH...]\n\
+  "[-?hbctw] [PATH...]\n\
   -h          help\n\
   -c          check mode\n\
   -b          binary mode\n\
   -t          textual mode\n\
   -w          warning mode\n\
 \n\
-cosmopolitan " PROG " v1.0\n\
+cosmopolitan sha256sum v1.1\n\
 copyright 2022 justine alexandra roberts tunney\n\
 notice licenses are embedded in the binary\n\
 https://twitter.com/justinetunney\n\
@@ -56,11 +54,17 @@ static bool g_warn;
 static char g_mode;
 static bool g_check;
 static int g_mismatches;
+static const char *prog;
+
+static wontreturn void PrintUsage(int rc, int fd) {
+  tinyprint(fd, "Usage: ", prog, USAGE, NULL);
+  exit(rc);
+}
 
 static void GetOpts(int argc, char *argv[]) {
   int opt;
   g_mode = ' ';
-  while ((opt = getopt(argc, argv, "?hbctw")) != -1) {
+  while ((opt = getopt(argc, argv, "hbctw")) != -1) {
     switch (opt) {
       case 'w':
         g_warn = true;
@@ -75,28 +79,13 @@ static void GetOpts(int argc, char *argv[]) {
         g_mode = '*';
         break;
       case 'h':
-      case '?':
-        write(1, USAGE, sizeof(USAGE) - 1);
-        exit(0);
+        PrintUsage(0, 1);
       default:
-        write(2, USAGE, sizeof(USAGE) - 1);
-        exit(64);
+        PrintUsage(1, 2);
     }
   }
 }
 
-static ssize_t Write(int fd, const char *s, ...) {
-  va_list va;
-  char buf[512];
-  buf[0] = 0;
-  va_start(va, s);
-  do {
-    strlcat(buf, s, sizeof(buf));
-  } while ((s = va_arg(va, const char *)));
-  va_end(va);
-  return write(fd, buf, strlen(buf));
-}
-
 static bool IsModeCharacter(char c) {
   switch (c) {
     case ' ':
@@ -117,7 +106,7 @@ static bool IsSupportedPath(const char *path) {
       case '\r':
       case '\n':
       case '\\':
-        Write(2, PROG, ": ", path, ": unsupported path\n", NULL);
+        tinyprint(2, prog, ": ", path, ": unsupported path\n", NULL);
         return false;
       default:
         break;
@@ -135,7 +124,7 @@ static bool GetDigest(const char *path, FILE *f, unsigned char digest[32]) {
     _unassert(!mbedtls_sha256_update_ret(&ctx, buf, got));
   }
   if (ferror(f)) {
-    Write(2, PROG, ": ", path, ": ", _strerdoc(errno), "\n", NULL);
+    tinyprint(2, prog, ": ", path, ": ", strerror(errno), "\n", NULL);
     return false;
   }
   _unassert(!mbedtls_sha256_finish_ret(&ctx, digest));
@@ -150,7 +139,7 @@ static bool ProduceDigest(const char *path, FILE *f) {
   if (!IsSupportedPath(path)) return false;
   if (!GetDigest(path, f, digest)) return false;
   hexpcpy(hexdigest, digest, 32);
-  Write(1, hexdigest, " ", mode, path, "\n", NULL);
+  tinyprint(1, hexdigest, " ", mode, path, "\n", NULL);
   return true;
 }
 
@@ -182,13 +171,13 @@ static bool CheckDigests(const char *path, FILE *f) {
           ++g_mismatches;
           k = false;
         }
-        Write(1, path2, ": ", status, "\n", NULL);
+        tinyprint(1, path2, ": ", status, "\n", NULL);
       } else {
         k = false;
       }
       fclose(f2);
     } else {
-      Write(2, PROG, ": ", path2, ": ", _strerdoc(errno), "\n", NULL);
+      tinyprint(2, prog, ": ", path2, ": ", strerror(errno), "\n", NULL);
       k = false;
     }
     continue;
@@ -196,12 +185,12 @@ static bool CheckDigests(const char *path, FILE *f) {
     if (g_warn) {
       char linestr[12];
       FormatInt32(linestr, line + 1);
-      Write(2, PROG, ": ", path, ":", linestr, ": ",
-            "improperly formatted checksum line", "\n", NULL);
+      tinyprint(2, prog, ": ", path, ":", linestr, ": ",
+                "improperly formatted checksum line", "\n", NULL);
     }
   }
   if (ferror(f)) {
-    Write(2, PROG, ": ", path, ": ", _strerdoc(errno), "\n", NULL);
+    tinyprint(2, prog, ": ", path, ": ", strerror(errno), "\n", NULL);
     k = false;
   }
   return k;
@@ -219,6 +208,8 @@ int main(int argc, char *argv[]) {
   int i;
   FILE *f;
   bool k = true;
+  prog = argv[0];
+  if (!prog) prog = "sha256sum";
   GetOpts(argc, argv);
   if (optind == argc) {
     f = stdin;
@@ -229,7 +220,7 @@ int main(int argc, char *argv[]) {
         k &= Process(argv[i], f);
         fclose(f);
       } else {
-        Write(2, PROG, ": ", argv[i], ": ", _strerdoc(errno), "\n", NULL);
+        tinyprint(2, prog, ": ", argv[i], ": ", strerror(errno), "\n", NULL);
         k = false;
       }
     }
@@ -237,8 +228,8 @@ int main(int argc, char *argv[]) {
   if (g_mismatches) {
     char ibuf[12];
     FormatInt32(ibuf, g_mismatches);
-    Write(2, PROG, ": WARNING: ", ibuf, " computed checksum did NOT match\n",
-          NULL);
+    tinyprint(2, prog, ": WARNING: ", ibuf,
+              " computed checksum did NOT match\n", NULL);
   }
   return !k;
 }