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tools: mkenvimage: Fix read() stdin error handling
On success read() returns the number of bytes read or zero for EOF. On error -1 is returned and errno is set, so the right way to test if read had failed is to test the return value instead of errno. Signed-off-by: Alexander Dahl <ada@thorsis.com>
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@ -168,7 +168,7 @@ int main(int argc, char **argv)
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return EXIT_FAILURE;
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return EXIT_FAILURE;
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}
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}
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readbytes = read(txt_fd, filebuf + filesize, readlen);
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readbytes = read(txt_fd, filebuf + filesize, readlen);
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if (errno) {
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if (readbytes < 0) {
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fprintf(stderr, "Error while reading stdin: %s\n",
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fprintf(stderr, "Error while reading stdin: %s\n",
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strerror(errno));
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strerror(errno));
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return EXIT_FAILURE;
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return EXIT_FAILURE;
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