Introduce new function gunzip_init()

gunzip_init() will make it easier to use gunzip from other bb functions.

diff --git a/archival/gunzip.c b/archival/gunzip.c
index a5846c3784a91aea8ea6534262fdee05ec47f542..48db7cfd79321c178902dc081dda78235a27480b 100644 (file)
--- a/archival/gunzip.c
+++ b/archival/gunzip.c
@@ -1176,10 +1176,43 @@ void clear_bufs(void)
        bytes_in = bytes_out = 0L;
 }
 
+/* ===========================================================================
+ * Initialize gunzip buffers and signals
+ */
+static int gunzip_init()
+{
+       foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
+       if (foreground) {
+               (void) signal(SIGINT, (sig_type) abort_gzip);
+       }
+#ifdef SIGTERM
+       if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
+               (void) signal(SIGTERM, (sig_type) abort_gzip);
+       }
+#endif
+#ifdef SIGHUP
+       if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
+               (void) signal(SIGHUP, (sig_type) abort_gzip);
+       }
+#endif
+
+       /* Allocate all global buffers (for DYN_ALLOC option) */
+       inbuf = xmalloc((size_t)((INBUFSIZ+INBUF_EXTRA+1L)*sizeof(uch)));
+       outbuf = xmalloc((size_t)((OUTBUFSIZ+OUTBUF_EXTRA+1L)*sizeof(uch)));
+       d_buf = xmalloc((size_t)((DIST_BUFSIZE+1L)*sizeof(ush)));
+       window = xmalloc((size_t)(((2L*WSIZE)+1L)*sizeof(uch)));
+       tab_prefix0 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
+       tab_prefix1 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));
+       
+       clear_bufs();                   /* clear input and output buffers */
+       part_nb = 0;
+       return(EXIT_SUCCESS);   
+}
+
+
 /* ======================================================================== */
 int gunzip_main(int argc, char **argv)
 {
-       int file_count;                         /* number of files to precess */
        int tostdout = 0;
        int fromstdin = 0;
        int result;
@@ -1229,31 +1262,7 @@ int gunzip_main(int argc, char **argv)
        if (isatty(fileno(stdout)) && tostdout==1 && force==0)
                error_msg_and_die( "data not written to terminal. Use -f to force it.\n");
 
-
-       foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
-       if (foreground) {
-               (void) signal(SIGINT, (sig_type) abort_gzip);
-       }
-#ifdef SIGTERM
-       if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
-               (void) signal(SIGTERM, (sig_type) abort_gzip);
-       }
-#endif
-#ifdef SIGHUP
-       if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
-               (void) signal(SIGHUP, (sig_type) abort_gzip);
-       }
-#endif
-
-       file_count = argc - optind;
-
-       /* Allocate all global buffers (for DYN_ALLOC option) */
-       inbuf = xmalloc((size_t)((INBUFSIZ+INBUF_EXTRA+1L)*sizeof(uch)));
-       outbuf = xmalloc((size_t)((OUTBUFSIZ+OUTBUF_EXTRA+1L)*sizeof(uch)));
-       d_buf = xmalloc((size_t)((DIST_BUFSIZE+1L)*sizeof(ush)));
-       window = xmalloc((size_t)(((2L*WSIZE)+1L)*sizeof(uch)));
-       tab_prefix0 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
-       tab_prefix1 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
+       gunzip_init();
 
        if (fromstdin == 1) {
                strcpy(ofname, "stdin");
@@ -1290,9 +1299,6 @@ int gunzip_main(int argc, char **argv)
                strcpy(ofname, "stdout");
                outFileNum = fileno(stdout);
 
-               clear_bufs();                   /* clear input and output buffers */
-               part_nb = 0;
-
                /* Actually do the compression/decompression. */
                unzip(inFileNum, outFileNum);
 
@@ -1334,9 +1340,6 @@ int gunzip_main(int argc, char **argv)
                /* Set permissions on the file */
                fchmod(outFileNum, statBuf.st_mode);
 
-               clear_bufs();                   /* clear input and output buffers */
-               part_nb = 0;
-
                /* Actually do the compression/decompression. */
                result = unzip(inFileNum, outFileNum);
 

diff --git a/gunzip.c b/gunzip.c
index a5846c3784a91aea8ea6534262fdee05ec47f542..48db7cfd79321c178902dc081dda78235a27480b 100644 (file)
--- a/gunzip.c
+++ b/gunzip.c
@@ -1176,10 +1176,43 @@ void clear_bufs(void)
        bytes_in = bytes_out = 0L;
 }
 
+/* ===========================================================================
+ * Initialize gunzip buffers and signals
+ */
+static int gunzip_init()
+{
+       foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
+       if (foreground) {
+               (void) signal(SIGINT, (sig_type) abort_gzip);
+       }
+#ifdef SIGTERM
+       if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
+               (void) signal(SIGTERM, (sig_type) abort_gzip);
+       }
+#endif
+#ifdef SIGHUP
+       if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
+               (void) signal(SIGHUP, (sig_type) abort_gzip);
+       }
+#endif
+
+       /* Allocate all global buffers (for DYN_ALLOC option) */
+       inbuf = xmalloc((size_t)((INBUFSIZ+INBUF_EXTRA+1L)*sizeof(uch)));
+       outbuf = xmalloc((size_t)((OUTBUFSIZ+OUTBUF_EXTRA+1L)*sizeof(uch)));
+       d_buf = xmalloc((size_t)((DIST_BUFSIZE+1L)*sizeof(ush)));
+       window = xmalloc((size_t)(((2L*WSIZE)+1L)*sizeof(uch)));
+       tab_prefix0 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
+       tab_prefix1 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));
+       
+       clear_bufs();                   /* clear input and output buffers */
+       part_nb = 0;
+       return(EXIT_SUCCESS);   
+}
+
+
 /* ======================================================================== */
 int gunzip_main(int argc, char **argv)
 {
-       int file_count;                         /* number of files to precess */
        int tostdout = 0;
        int fromstdin = 0;
        int result;
@@ -1229,31 +1262,7 @@ int gunzip_main(int argc, char **argv)
        if (isatty(fileno(stdout)) && tostdout==1 && force==0)
                error_msg_and_die( "data not written to terminal. Use -f to force it.\n");
 
-
-       foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
-       if (foreground) {
-               (void) signal(SIGINT, (sig_type) abort_gzip);
-       }
-#ifdef SIGTERM
-       if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
-               (void) signal(SIGTERM, (sig_type) abort_gzip);
-       }
-#endif
-#ifdef SIGHUP
-       if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
-               (void) signal(SIGHUP, (sig_type) abort_gzip);
-       }
-#endif
-
-       file_count = argc - optind;
-
-       /* Allocate all global buffers (for DYN_ALLOC option) */
-       inbuf = xmalloc((size_t)((INBUFSIZ+INBUF_EXTRA+1L)*sizeof(uch)));
-       outbuf = xmalloc((size_t)((OUTBUFSIZ+OUTBUF_EXTRA+1L)*sizeof(uch)));
-       d_buf = xmalloc((size_t)((DIST_BUFSIZE+1L)*sizeof(ush)));
-       window = xmalloc((size_t)(((2L*WSIZE)+1L)*sizeof(uch)));
-       tab_prefix0 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
-       tab_prefix1 = xmalloc((size_t)(((1L<<(BITS-1))+1L)*sizeof(ush)));       
+       gunzip_init();
 
        if (fromstdin == 1) {
                strcpy(ofname, "stdin");
@@ -1290,9 +1299,6 @@ int gunzip_main(int argc, char **argv)
                strcpy(ofname, "stdout");
                outFileNum = fileno(stdout);
 
-               clear_bufs();                   /* clear input and output buffers */
-               part_nb = 0;
-
                /* Actually do the compression/decompression. */
                unzip(inFileNum, outFileNum);
 
@@ -1334,9 +1340,6 @@ int gunzip_main(int argc, char **argv)
                /* Set permissions on the file */
                fchmod(outFileNum, statBuf.st_mode);
 
-               clear_bufs();                   /* clear input and output buffers */
-               part_nb = 0;
-
                /* Actually do the compression/decompression. */
                result = unzip(inFileNum, outFileNum);