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| author | Felix Fietkau <nbd@openwrt.org> | 2008-09-25 18:24:18 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2008-09-25 18:24:18 +0000 |
| commit | 5a0a3cbc0016743e4092b7b21b3f6fddf63a8bde (patch) | |
| tree | 9880bf7a41af8ed37680aa1f5b2adc79ea048ce5 | |
| parent | d58b9ba0d0106346328442a9d76b3ea8c498b1ac (diff) | |
| download | mtk-20170518-5a0a3cbc0016743e4092b7b21b3f6fddf63a8bde.zip mtk-20170518-5a0a3cbc0016743e4092b7b21b3f6fddf63a8bde.tar.gz mtk-20170518-5a0a3cbc0016743e4092b7b21b3f6fddf63a8bde.tar.bz2 | |
mtd: improve support for reading input from a pipe. fixes sysupgrade
SVN-Revision: 12706
| -rw-r--r-- | package/mtd/src/mtd.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c index 18c3e97..6e430f4 100644 --- a/package/mtd/src/mtd.c +++ b/package/mtd/src/mtd.c @@ -246,7 +246,7 @@ static int mtd_write(int imagefd, const char *mtd) { int fd, result; - size_t r, w, e; + ssize_t r, w, e; fd = mtd_check_open(mtd); if(fd < 0) { @@ -263,11 +263,27 @@ mtd_write(int imagefd, const char *mtd) for (;;) { /* buffer may contain data already (from trx check) */ - r = read(imagefd, buf + buflen, erasesize - buflen); - if (r < 0) - break; + do { + r = read(imagefd, buf + buflen, erasesize - buflen); + if (r < 0) { + if ((errno == EINTR) || (errno == EAGAIN)) + continue; + else { + perror("read"); + break; + } + } + + if (r == 0) { + fprintf(stderr, "No more data left\n"); + break; + } + + buflen += r; + } while (buflen < erasesize); - buflen += r; + if (buflen == 0) + break; if (jffs2file) { if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF)) == 0) { @@ -309,10 +325,6 @@ mtd_write(int imagefd, const char *mtd) } w += buflen; - /* not enough data - eof */ - if (buflen < erasesize) - break; - buflen = 0; } if (!quiet) |