e2fsck: add support for field widths in messages using %-expansion

This will come in handy when printing checksums, some of which are
32-bit and some of which are 16-bit.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/e2fsck/message.c b/e2fsck/message.c
index 4dab1a4..1a91044 100644 (file)
--- a/e2fsck/message.c
+++ b/e2fsck/message.c
@@ -397,7 +397,7 @@ static _INLINE_ void expand_dirent_expression(ext2_filsys fs, char ch,
 }
 
 static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
-                                              int *first,
+                                              int width, int *first,
                                               struct problem_context *ctx)
 {
        e2fsck_t e2fsck_ctx = fs ? (e2fsck_t) fs->priv_data : NULL;
@@ -412,9 +412,9 @@ static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
                break;
        case 'b':
 #ifdef EXT2_NO_64_TYPE
-               printf("%u", (unsigned long) ctx->blk);
+               printf("%*u", width, (unsigned long) ctx->blk);
 #else
-               printf("%llu", (unsigned long long) ctx->blk);
+               printf("%*llu", width, (unsigned long long) ctx->blk);
 #endif
                break;
        case 'B':
@@ -441,31 +441,31 @@ static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
                break;
        case 'c':
 #ifdef EXT2_NO_64_TYPE
-               printf("%u", (unsigned long) ctx->blk2);
+               printf("%*u", width, (unsigned long) ctx->blk2);
 #else
-               printf("%llu", (unsigned long long) ctx->blk2);
+               printf("%*llu", width, (unsigned long long) ctx->blk2);
 #endif
                break;
        case 'd':
-               printf("%u", ctx->dir);
+               printf("%*u", width, ctx->dir);
                break;
        case 'g':
-               printf("%d", ctx->group);
+               printf("%*d", width, ctx->group);
                break;
        case 'i':
-               printf("%u", ctx->ino);
+               printf("%*u", width, ctx->ino);
                break;
        case 'j':
-               printf("%u", ctx->ino2);
+               printf("%*u", width, ctx->ino2);
                break;
        case 'm':
-               printf("%s", error_message(ctx->errcode));
+               printf("%*s", width, error_message(ctx->errcode));
                break;
        case 'N':
 #ifdef EXT2_NO_64_TYPE
-               printf("%u", ctx->num);
+               printf("%*u", width, ctx->num);
 #else
-               printf("%llu", (long long)ctx->num);
+               printf("%*llu", width, (long long)ctx->num);
 #endif
                break;
        case 'p':
@@ -483,16 +483,16 @@ static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
                break;
        case 'r':
 #ifdef EXT2_NO_64_TYPE
-               printf("%d", ctx->blkcount);
+               printf("%*d", width, ctx->blkcount);
 #else
-               printf("%lld", (long long) ctx->blkcount);
+               printf("%*lld", width, (long long) ctx->blkcount);
 #endif
                break;
        case 'S':
                printf("%u", get_backup_sb(NULL, fs, NULL, NULL));
                break;
        case 's':
-               printf("%s", ctx->str ? ctx->str : "NULL");
+               printf("%*s", width, ctx->str ? ctx->str : "NULL");
                break;
        case 't':
                print_time((time_t) ctx->num);
@@ -502,9 +502,9 @@ static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
                break;
        case 'X':
 #ifdef EXT2_NO_64_TYPE
-               printf("0x%x", ctx->num);
+               printf("0x%*x", width, ctx->num);
 #else
-               printf("0x%llx", (long long)ctx->num);
+               printf("0x%*llx", width, (long long)ctx->num);
 #endif
                break;
        default:
@@ -520,22 +520,30 @@ void print_e2fsck_message(e2fsck_t ctx, const char *msg,
 {
        ext2_filsys fs = ctx->fs;
        const char *    cp;
-       int             i;
+       int             i, width;
 
        e2fsck_clear_progbar(ctx);
        for (cp = msg; *cp; cp++) {
                if (cp[0] == '@') {
                        cp++;
                        expand_at_expression(ctx, *cp, pctx, &first, recurse);
-               } else if (cp[0] == '%' && cp[1] == 'I') {
-                       cp += 2;
-                       expand_inode_expression(fs, *cp, pctx);
-               } else if (cp[0] == '%' && cp[1] == 'D') {
-                       cp += 2;
-                       expand_dirent_expression(fs, *cp, pctx);
-               } else if ((cp[0] == '%')) {
+               } else if (cp[0] == '%') {
                        cp++;
-                       expand_percent_expression(fs, *cp, &first, pctx);
+                       width = 0;
+                       while (isdigit(cp[0])) {
+                               width = (width * 10) + cp[0] - '0';
+                               cp++;
+                       }
+                       if (cp[0] == 'I') {
+                               cp++;
+                               expand_inode_expression(fs, *cp, pctx);
+                       } else if (cp[0] == 'D') {
+                               cp++;
+                               expand_dirent_expression(fs, *cp, pctx);
+                       } else {
+                               expand_percent_expression(fs, *cp, width,
+                                                         &first, pctx);
+                       }
                } else {
                        for (i=0; cp[i]; i++)
                                if ((cp[i] == '@') || cp[i] == '%')