Ability to specify output compressed pathname.

Fix log level handling.
Trim commented code.

README.md

@@ -56,7 +56,7 @@ Usage
 =====
 
     To compress a file:
-       pcompress -c <algorithm> [-l <compress level>] [-s <chunk size>] <file> [-]
+       pcompress -c <algorithm> [-l <compress level>] [-s <chunk size>] <file> [<target file>]
 
        Where <algorithm> can be the folowing:
        lzfx   - Very fast and small algorithm based on LZF.
@@ -90,8 +90,10 @@ Usage
                 just a hint and may get automatically adjusted.
        <compress_level> - Can be a number from 0 meaning minimum and 14 meaning
                 maximum compression.
-       '-'    - If '-' is given as the final argument then it specifies that
+       <target file>    - Optional argument specifying the destination compressed
-                compressed output should go to stdout.
+                file. The '.pz' extension is appended. If this is '-' then
+                compressed output goes to stdout. If this argument is omitted then
+                source filename is used with the extension '.pz' appended.
 
 NOTE: The option "libbsc" uses  Ilya Grebnov's block sorting compression library
       from http://libbsc.com/ . It is only available if pcompress in built with

pcompress.c

@@ -85,7 +85,7 @@ usage(pc_ctx_t *pctx)
 	    "\nPcompress Version %s\n\n"
 	    "Usage:\n"
 	    "1) To compress a file:\n"
-	    "   %s -c <algorithm> [-l <compress level>] [-s <chunk size>] <file>\n"
+	    "   %s -c <algorithm> [-l <compress level>] [-s <chunk size>] <file> [<target file>]\n"
 	    "   Where <algorithm> can be the folowing:\n"
 	    "   lzfx   - Very fast and small algorithm based on LZF.\n"
 	    "   lz4    - Ultra fast, high-throughput algorithm reaching RAM B/W at level1.\n"
@@ -115,6 +115,10 @@ usage(pc_ctx_t *pctx)
 	    "            Larger chunks produce better compression at the cost of memory.\n"
 	    "   <compress_level> - Can be a number from 0 meaning minimum and 14 meaning\n"
 	    "            maximum compression.\n\n"
+	    "   <target file>    - Optional argument specifying the destination compressed\n"
+	    "            file. The '.pz' extension is appended. If this is '-' then\n"
+	    "            compressed output goes to stdout. If this argument is omitted then\n"
+	    "            source filename is used with the extension '.pz' appended.\n"
 	    "2) To decompress a file compressed using above command:\n"
 	    "   %s -d <compressed file> <target file>\n"
 	    "3) To operate as a pipe, read from stdin and write to stdout:\n"
@@ -1882,6 +1886,7 @@ start_compress(pc_ctx_t *pctx, const char *filename, uint64_t chunksize, int lev
 				COMP_BAIL;
 			}
 		} else {
+			if (pctx->to_filename == NULL) {
 				strcat(tmpfile1, "/.pcompXXXXXX");
 				snprintf(to_filename, sizeof (to_filename), "%s" COMP_EXTN, filename);
 				if ((compfd = mkstemp(tmpfile1)) == -1) {
@@ -1889,6 +1894,14 @@ start_compress(pc_ctx_t *pctx, const char *filename, uint64_t chunksize, int lev
 					COMP_BAIL;
 				}
 				add_fname(tmpfile1);
+			} else {
+				snprintf(to_filename, sizeof (to_filename), "%s" COMP_EXTN, pctx->to_filename);
+				if ((compfd = open(to_filename, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) == -1) {
+					perror("open ");
+					COMP_BAIL;
+				}
+				add_fname(to_filename);
+			}
 		}
 		signal(SIGINT, Int_Handler);
 		signal(SIGTERM, Int_Handler);
@@ -2369,12 +2382,17 @@ comp_done:
 			fchmod(compfd, sbuf.st_mode);
 			if (fchown(compfd, sbuf.st_uid, sbuf.st_gid) == -1)
 				perror("chown ");
+			close(compfd);
 
+			if (pctx->to_filename == NULL) {
 				if (rename(tmpfile1, to_filename) == -1) {
 					perror("Cannot rename temporary file ");
 					unlink(tmpfile1);
 				}
 				rm_fname(tmpfile1);
+			} else {
+				rm_fname(to_filename);
+			}
 		}
 	}
 	if (dary != NULL) {
@@ -2823,13 +2841,11 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
 				if (*(argv[my_optind]) == '-') {
 					pctx->to_filename = "-";
 					pctx->pipe_out = 1;
-				}
+					pctx->to_filename = NULL;
-				pctx->to_filename = realpath(argv[my_optind], NULL);
 				} else {
-				strcpy(apath, pctx->filename);
+					strcpy(apath, argv[my_optind]);
 					strcat(apath, COMP_EXTN);
 					pctx->to_filename = realpath(apath, NULL);
-			}
 
 					/* Check if compressed file exists */
 					if (pctx->to_filename != NULL) {
@@ -2837,6 +2853,20 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
 						free((void *)(pctx->to_filename));
 						return (1);
 					}
+					pctx->to_filename = argv[my_optind];
+				}
+			} else {
+				strcpy(apath, pctx->filename);
+				strcat(apath, COMP_EXTN);
+				pctx->to_filename = realpath(apath, NULL);
+
+				/* Check if compressed file exists */
+				if (pctx->to_filename != NULL) {
+					log_msg(LOG_ERR, 0, "Compressed file %s exists\n", pctx->to_filename);
+					free((void *)(pctx->to_filename));
+					return (1);
+				}
+			}
 		} else if (pctx->do_uncompress && num_rem == 2) {
 			/*
 			 * While decompressing, input can be stdin and output a physical file.

utils/utils.c

@@ -57,37 +57,6 @@ init_pcompress() {
 	XXH32_module_init();
 }
 
-/*
-void
-err_exit(int show_errno, const char *format, ...)
-{
-	int err = errno;
-	va_list args;
-
-	va_start(args, format);
-	vfprintf(stderr, format, args);
-	va_end(args);
-
-	if (show_errno)
-		fprintf(stderr, "\nError: %s\n", strerror(err));
-	exit(1);
-}
-
-void
-err_print(int show_errno, const char *format, ...)
-{
-	int err = errno;
-	va_list args;
-
-	va_start(args, format);
-	vfprintf(stderr, format, args);
-	va_end(args);
-
-	if (show_errno)
-		fprintf(stderr, "\nError: %s\n", strerror(err));
-}
-*/
-
 /*
  * Fetch the command name that started the current process.
  * The returned string must be freed by the caller.
@@ -475,7 +444,7 @@ log_msg(log_level_t log_level, int show_errno, const char *format, ...)
 	va_list args;
 	char msg[1024];
 
-	if (log_level <= cur_log_level) return;
+	if (log_level > cur_log_level) return;
 
 	va_start(args, format);
 	written = vsnprintf(msg, 1024, format, args);