1 files changed, 145 insertions, 0 deletions
diff --git a/src/proone-packer.c b/src/proone-packer.c
new file mode 100644
index 0000000..3568bf8
--- /dev/null
+++ b/src/proone-packer.c
@@ -0,0 +1,145 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sendfile.h>
+#include <fcntl.h>
+
+#include "proone_protocol.h"
+
+
+int main (const int args, const char **argc) {
+    typedef struct {
+        proone_arch_t arch;
+        const char *path;
+    } archive_tuple_t;
+    size_t i;
+    const archive_tuple_t *encounter_arr[NB_PROONE_ARCH];
+    archive_tuple_t archive_arr[NB_PROONE_ARCH];
+    archive_tuple_t *archive;
+    size_t archive_arr_cnt = 0;
+    const char *path, *ext;
+    bool proc_result = true;
+    proone_arch_t arch;
+    int bin_fd = -1;
+    struct stat st;
+    uint8_t head[4];
+
+    if (args <= 1) {
+        fprintf(stderr, "Usage: %s <path to binary 1> [path to binary 2 [path to binary ...]]\n", argc[0]);
+        return 1;
+    }
+    // refuse to run if stdout is terminal
+    if (isatty(STDOUT_FILENO)) {
+        fprintf(stderr, "** Refusing to print on terminal.\n");
+        return 1;
+    }
+    // too many files
+    if (args - 1 > NB_PROONE_ARCH) {
+        fprintf(stderr, "** Too many files given (%d > %d).\n", args - 1, NB_PROONE_ARCH);
+        return 1;
+    }
+
+    // init
+    memset(encounter_arr, 0, sizeof(archive_tuple_t*) * NB_PROONE_ARCH);
+    memset(archive_arr, 0, sizeof(archive_tuple_t) * NB_PROONE_ARCH);
+
+    // Check the file names are valid
+    for (i = 1; i < (size_t)args; i += 1) {
+        path = argc[i];
+
+        ext = strrchr(path, '.');
+        if (ext == NULL) {
+            fprintf(stderr, "** %s: file extension not found\n", path);
+            proc_result = false;
+            continue;
+        }
+        ext += 1;
+
+        arch = proone_str2arch(ext);
+        if (arch == PROONE_ARCH_NONE) {
+            fprintf(stderr, "** %s: unknown arch \"%s\"\n", path, ext);
+            proc_result = false;
+            continue;
+        }
+
+        if (encounter_arr[arch] != NULL) {
+            fprintf(stderr, "** Duplicate arch!\n%s\n%s\n", encounter_arr[arch]->path, path);
+            proc_result = false;
+            continue;
+        }
+
+        archive_arr[archive_arr_cnt].arch = arch;
+        archive_arr[archive_arr_cnt].path = path;
+        encounter_arr[arch] = &archive_arr[archive_arr_cnt];
+        archive_arr_cnt += 1;
+    }
+    if (!proc_result) {
+        return 1;
+    }
+
+    // do packing
+    fprintf(stderr, archive_arr_cnt == NB_PROONE_ARCH ? "Packing %zu binaries.\n" : "* Warning: packing only %zu binaries\n", archive_arr_cnt);
+    for (i = 0; i < archive_arr_cnt; i += 1) {
+        archive = &archive_arr[i];
+        fprintf(stderr, "Packing: %s ...\n", archive->path);
+
+        bin_fd = open(archive->path, O_RDONLY);
+        if (bin_fd < 0) {
+            perror("** open()");
+            proc_result = false;
+            break;
+        }
+
+        // get size
+        if (fstat(bin_fd, &st) != 0) {
+            perror("** fstat()");
+            proc_result = false;
+            break;
+        }
+        if (st.st_size == 0) {
+            fprintf(stderr, "** empty file!\n");
+            proc_result = false;
+            break;
+        }
+        if (st.st_size > 0x00FFFFFE) {
+            fprintf(stderr, "** binary too large!\n");
+            proc_result = false;
+            break;
+        }
+
+        // write head
+        head[0] = (uint8_t)archive->arch;
+        // endian conversion as the file is big endian
+        head[1] = (uint8_t)(((uint32_t)st.st_size & 0x00FF0000) >> 16);
+        head[2] = (uint8_t)(((uint32_t)st.st_size & 0x0000FF00) >> 8);
+        head[3] = (uint8_t)((uint32_t)st.st_size & 0x000000FF);
+        if (write(STDOUT_FILENO, head, 4) != 4) {
+            perror("write()");
+            proc_result = false;
+            break;
+        }
+        
+        // write binary
+        if (sendfile(STDOUT_FILENO, bin_fd, NULL, st.st_size) < 0) {
+            perror("** sendfile()");
+            proc_result = false;
+            break;
+        }
+
+        close(bin_fd);
+        bin_fd = -1;
+    }
+
+    close(bin_fd);
+    bin_fd = -1;
+    errno = 0;
+
+    return proc_result ? 0 : 2;
+}